Medical device

Abstract

The invention provides a medical device and the like. The medical device comprises a long medical device main body; a first operation wire and a second operation wire respectively inserted along the axial direction of the medical device main body; and a bending operation unit for performing a bending operation on the tip of the medical device main body by pulling the first operation wire and the second operation wire. The first operation wire and the second operation wire extend parallel to each other at a distance from each other in the circumferential direction of the medical device main body in an intermediate portion and a base end portion in the axial direction of the medical device main body, and the first operation wire and the second operation wire extend parallel to each other in a distal end portion in the axial direction of the medical device main body. The first operation wire and the second operation wire are bent toward the front end side so as to gradually approach each other in the circumferential direction of the medical device main body and merge.

Description

[0001] This application is a divisional application of the application filed on August 2, 2018, with application number 2018800415294 and invention title "Medical Device". Technical Field

[0002] This invention relates to a medical device.

[0003] This application claims priority based on Japanese Patent Application No. 2017-150210, filed in Japan on August 2, 2017; Japanese Patent Application No. 2018-015534, filed in Japan on January 31, 2018; and Japanese Patent Application No. 2018-015535, filed in Japan on January 31, 2018, the contents of which are incorporated herein by reference. Background Technology

[0004] As a type of medical device with an elongated catheter capable of bending at its tip, there are known medical devices with an operating line (e.g., Patent Document 1).

[0005] In the catheter of Patent Document 1, multiple hollow tubes are arranged around a central lumen, and an operating line is inserted into the interior of two hollow tubes facing each other across the central lumen. In the catheter of the patent document, the front end of the operating line is fixed to the front end of the catheter. The catheter of the patent document is configured to allow for traction of the rear end of the operating line. Thus, by selecting the operating line for traction, the front end of the catheter can be bent.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2013-48711 Summary of the Invention

[0009] The technical problem to be solved by the invention

[0010] However, in the catheter of Patent Document 1, when the tip is bent after passing through a curved blood vessel or other body cavity, it is easy to bend it inward, but not easy to bend it outward.

[0011] The reason is that if the operating line located on the curved outer course is pulled to bend the catheter tip outward, the catheter will rotate around its axis in the curved blood vessel in the direction that the path of the pulled operating line becomes shorter.

[0012] The present invention was made in view of the above-mentioned problems and provides a medical device such as a catheter with a structure that can more reliably bend the tip in the desired direction.

[0013] Furthermore, in medical devices such as catheters, operability is required to meet various needs, and from this perspective, the technology in Patent Document 1 still has room for improvement.

[0014] The present invention was made in view of the above-mentioned problems and provides medical devices such as catheters that can appropriately realize operability corresponding to various needs.

[0015] means for solving technical problems

[0016] This invention provides a medical device comprising: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. At the front end of the medical device body in the axial direction, the first operating line and the second operating line bend and converge toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body.

[0017] Furthermore, the present invention provides a medical device comprising: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. The bending operation unit includes: A rotating component, which is rotatably supported by a shaft and has the base end of the first operating line and the base end of the second operating line fixed thereon; The moving mechanism causes the rotating component to move in the traction direction of the first operating line and the second operating line, and in a direction opposite to the traction direction; and The operation receiving unit receives user commands and performs actions accordingly. The power of the operating receiving unit is transmitted to the rotating component via the moving mechanism, thereby causing the rotating component to move in the traction direction and the opposite direction.

[0018] The effects of the invention

[0019] According to the present invention, the front end can be bent in the desired direction more reliably. Furthermore, according to the present invention, operability corresponding to various needs can be appropriately achieved. Attached Figure Description

[0020] Figure 1 This is a longitudinal sectional view of the front end portion of the main body of the medical device according to embodiments 1-1 and 2-1.

[0021] Figure 2 It is along Figure 1 A cross-sectional view of the main body of the medical device, cut along line AA.

[0022] Figure 3 It is along Figure 1 A cross-sectional view of the main body of the medical device, cut along the BB line.

[0023] Figure 4 It is along Figure 1 A cross-sectional view of the main body of the medical device, cut along the CC line.

[0024] Figure 5 middle, Figure 5 (a) and Figure 5 (b) is a schematic diagram illustrating the bending action of the front end of the medical device body of the medical device according to embodiments 1-1 and 2-1.

[0025] Figure 6 This is a top view showing the curved operating part and the surrounding portion of the medical device according to embodiments 1-1 and 2-1.

[0026] Figure 7 This is a side view showing the curved operating part and the surrounding portion of the medical device according to embodiments 1-1 and 2-1.

[0027] Figure 8 middle, Figure 8 (a) is an overall view of the medical device according to embodiments 1-1 and 2-1. Figure 8 (b) is an overall view of the medical device body of the medical device according to embodiments 1-1 and 2-1, in which the front end is bent to one side.

[0028] Figure 9 This is a longitudinal sectional view of the front end portion of the main body of the medical device according to embodiments 1-2 and 2-2.

[0029] Figure 10 It is along Figure 9 A cross-sectional view of the main body of the medical device, cut along line AA.

[0030] Figure 11middle, Figure 11 (a) and Figure 11 (b) is a schematic diagram illustrating the bending action of the front end of the medical device body of the medical device involved in the first-2 and second-2 embodiments.

[0031] Figure 12 This is a longitudinal sectional view of the front end portion of the main body of the medical device according to embodiments 1-3 and 2-3.

[0032] Figure 13 It is along Figure 12 A cross-sectional view of the main body of the medical device, cut along line AA.

[0033] Figure 14 It is along Figure 12 A cross-sectional view of the main body of the medical device, cut along the BB line.

[0034] Figure 15 It is along Figure 12 A cross-sectional view of the main body of the medical device, cut along the CC line.

[0035] Figure 16 middle, Figure 16 (a) Figure 16 (b) Figure 16 (c) and Figure 16 (d) is a schematic diagram illustrating the bending action of the front end of the medical device body of the medical device according to embodiments 1-3 and 2-3.

[0036] Figure 17 This is a side view showing the curved operating part and the surrounding portion of the medical device according to embodiments 1-3 and 2-3.

[0037] Figure 18 middle, Figure 18 (a) is an overall view of the medical device according to embodiments 1-3 and 2-3. Figure 18 (b) is an overall view of the medical device body of the medical device according to embodiments 1-3 and 2-3, showing the front end bent to one side. Figure 18 (c) is an overall view of the medical device body of the medical device according to embodiments 1-3 and 2-3, showing the front end bent to the other side.

[0038] Figure 19 middle, Figure 19 (a) and Figure 19 (b) is a schematic diagram of the front end of the main body of the medical device according to embodiments 1-4 and 2-4, wherein, Figure 19 (a) is a top view. Figure 19 (b) is a side view.

[0039] Figure 20 middle, Figure 20 (a) and Figure 20 (b) is a schematic diagram of the front end of the main body of the medical device according to embodiments 1-5 and 2-5, wherein, Figure 20 (a) is a top view. Figure 20 (b) is a side view.

[0040] Figure 21 This is a top view showing the curved operating part and the surrounding portion of the medical device according to embodiments 1-6 and 2-6.

[0041] Figure 22 This is a top view showing the curved operating part and the surrounding portion of the medical device according to embodiments 1-7 and 2-7. Detailed Implementation

[0042] Hereinafter, embodiments of the present invention will be described using the accompanying drawings. Furthermore, in all the drawings, the same reference numerals are used to refer to the same constituent elements, and descriptions are appropriately omitted.

[0043] The various constituent elements of the medical device involved in this embodiment do not need to exist independently, but multiple constituent elements are allowed to be formed as a single component, a single constituent element is formed by multiple components, a certain constituent element is part of other constituent elements, a part of a certain constituent element is repeated by a part of other constituent elements, etc.

[0044] Unless otherwise specified, the terms used in describing embodiments of the present invention are defined as follows.

[0045] In the description of the implementation method, terms such as "front end" and "base end" are sometimes used. The front end refers to a predetermined length region of each part of the medical device, including the distal end (insertion tip side) of the medical device. The base end refers to a predetermined length region of each part of the medical device, including the proximal end (base side) of the medical device.

[0046] Furthermore, the axis refers to the central axis along the long side of the main body of the medical device.

[0047] The longitudinal section of a medical device refers to the cross-section of the medical device cut along its axis.

[0048] The cross section of a medical device refers to the section of the medical device cut by a plane orthogonal to its axis.

[0049] [Implementation Method 1-1]

[0050] First, use Figures 1 to 8 (b) The first-1 embodiment will be described.

[0051] in addition, Figure 1 It is along Figure 2 A sectional view cut along line AA.

[0052] Figure 5 (a) and Figure 5 (b) is used to explain along Figure 4 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 5 (a) indicates the state before bending. Figure 5 (b) indicates a bent state.

[0053] Figure 7 In the middle, the internal structure of the frame 86 of the bending operation part 80 is shown by partially breaking the frame 86.

[0054] Figure 8 (a) Figure 8 In (b), the middle part of the long side of the main body 10 of the medical device is broken and omitted. Figure 8 (a) and Figure 8 (b) In the medical device body 10 shown, the rotational phases around the axis of the medical device body 10 differ by 90 degrees in the portion closer to the base end and the portion closer to the front end than the omitted portion.

[0055] like Figures 1 to 8 As shown in any of the figures in (b), the medical device 100 according to this embodiment includes: an elongated medical device body 10; a first operating line 41 and a second operating line 42, respectively inserted along the axial direction of the medical device body 10; and a bent operating portion 80. Figure 6 , Figure 7 ( ), used for bending the front end 11 of the medical device body 10 by traction through the first operating line 41 and the second operating line 42.

[0056] The middle part 12 and the base end 13 along the axial direction of the main body 10 of the medical device ( Figure 6 , Figure 7 The first operating line 41 and the second operating line 42 are separated from each other and extend side by side in the circumferential direction of the medical device body 10.

[0057] At the front end 11 of the medical device body 10 in the axial direction, the first operating line 41 and the second operating line 42 bend toward the front end side and converge in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0058] Here, the convergence of the first operating line 41 and the second operating line 42 means that the tip 41a of the first operating line 41 and the tip 42a of the second operating line 42 are close to each other. Preferably, the tip 41a of the first operating line 41 and the tip 42a of the second operating line 42 are close to each other by a distance less than the wall thickness of the resin tube 20 described later.

[0059] According to this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to achieve the following: Figure 5 (a) and Figure 5 (b) shows that the front end 11 of the medical device body 10 is bent. At this time, it is possible to achieve a balance between the load pulled by the first operating line 41 and the load pulled by the second operating line 42 on the front end 11 of the medical device body 10, and thus it is possible to suppress the phenomenon that the medical device body 10 rotates around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0060] Therefore, even when the front end 11 is bent after the main body 10 of the medical device passes through a curved blood vessel or other body cavity, it is possible to bend the front end 11 in the desired direction more reliably.

[0061] Furthermore, as in this embodiment, the medical device 100 has two operating lines, and when these operating lines converge, the direction in which the front end 11 bends can be made to be the same by the traction of the operating lines.

[0062] Medical devices typically include catheters.

[0063] The main body 10 of the medical device has a resin tube 20 with an inner cavity formed as a lumen 21.

[0064] In this embodiment, the resin tube 20 has a layered structure comprising: an inner layer 22 in the shape of a hollow tube, the inner cavity of which is a lumen 21; and an outer layer 23 in the shape of a hollow tube, coaxial with the inner layer 22 and formed on the outer periphery of the inner layer 22. The inner layer 22 and the outer layer 23 are each made of resin material. The inner peripheral surface of the outer layer 23 is bonded to the outer peripheral surface of the inner layer 22.

[0065] The resin material constituting the inner layer 22 and the resin material constituting the outer layer 23 may be different from each other or the same.

[0066] A hydrophilic coating may also be formed on the outer surface of the main body 10 of the medical device as needed.

[0067] The lumen 21 is continuously formed from the front end to the base end of the medical device body 10, and opens at the front end and the base end of the medical device body 10 respectively.

[0068] The main body 10 of the medical device also includes a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20. A first operating line 41 is inserted through the first hollow tube 31, and a second operating line 42 is inserted through the second hollow tube 32.

[0069] Hollow tube 31 and hollow tube 32 are secondary lumen hoses, and the inner lumen of these secondary lumen hoses is the secondary lumen. That is, each operating line (operating line 41, operating line 42) is inserted into the secondary lumen.

[0070] The inner diameters of the first hollow tube 31 and the second hollow tube 32 are smaller than the inner diameter of the lumen 21.

[0071] The first operating line 41 and the second operating line 42 are respectively made of fine wires such as metal or resin.

[0072] Furthermore, in this embodiment, since the first hollow tube 31 and the second hollow tube 32 are arranged to avoid the position that would become the inner ring side when the front end 11 of the medical device body 10 is bent, bending of the front end 11 can be easily performed. In particular, the closer to the base end side of the front end 11, the further away the first hollow tube 31 and the second hollow tube 32 are from the inner ring side, thus making bending easier.

[0073] At the front end 11 of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 are bent toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10. As a result, the first operating line 41 in the first hollow tube 31 and the second operating line 42 in the second hollow tube 32 are bent toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0074] Furthermore, the first hollow tube 31 and the second hollow tube 32 do not intersect each other. Also, the first operating line 41 and the second operating line 42 do not intersect each other.

[0075] Thus, the medical device body 10 is configured to include: a resin tube 20 having a lumen 21; and a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20, with a first operating line 41 and a second operating line 42 respectively inserted through them. At the front end 11 in the axial direction of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0076] Furthermore, in the axial direction of the medical device body 10, the area where the first operating line 41 and the second operating line 42 bend towards the front end in a manner that gradually approaches each other in the circumferential direction of the medical device body 10 is called the bending region 15. The base position 15a of the bending region 15 is the position where the first operating line 41 and the second operating line 42 begin to bend towards each other, and the front position 15b of the bending region 15 is the position where the first operating line 41 and the second operating line 42 end to bend towards each other.

[0077] In this embodiment, the front end position 15b of the curved region 15 is the position of the front end 41a, 42a of the first operation line 41 and the second operation line 42 or a position near it.

[0078] The front end 41a of the first operating line 41 protrudes from the front end 31a of the first hollow tube 31. Similarly, the front end 42a of the second operating line 42 protrudes from the front end 32a of the second hollow tube 32.

[0079] For example, front end 41a is located near front end 31a, and front end 42a is located near front end 32a.

[0080] The medical device body 10 includes, for example, a braided layer 51 embedded in the resin tube 20. Thus, the medical device body 10 is reinforced by the braided layer 51. The braided layer 51 is constructed by braiding multiple threads. The braided layer 51 is, for example, disposed around the inner layer 22.

[0081] In addition, the first hollow tube 31 and the second hollow tube 32 are, for example, arranged on the radially outer side of the medical device body 10 (away from the axis of the medical device body 10) than the braided layer 51.

[0082] The medical device body 10 also includes a winding wire 52 embedded in the resin tube 20. The winding wire 52 is wound radially outward from the medical device body 10, further than the braided layer 51, the first hollow tube 31, and the second hollow tube 32. For example, the winding wire 52 binds the first hollow tube 31 and the second hollow tube 32 to the braided layer 51.

[0083] In the curved region 15, the first hollow tube 31 and the second hollow tube 32 are respectively arranged along the outer periphery of the braided layer 51 (see reference). Figure 3 , Figure 4 ).

[0084] In the curved region 15, the distance between the first hollow tube 31 and the second hollow tube 32 in the circumferential direction of the medical device body 10 gradually decreases towards the front end, and the distance between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 also gradually decreases towards the front end.

[0085] Furthermore, the first hollow tube 31 and the second hollow tube 32 are respectively shaped into a curved shape at a position further forward than the base end position 15a of the curved region 15. At the base end position 15a of the curved region 15, the first hollow tube 31 and the second hollow tube 32 can be fixed to at least one of the braided layer 51 or the inner layer 22, or the front end of the wound wire 52 can be disposed at the base end position 15a of the curved region 15, so that at a position further forward than the base end position 15a, the first hollow tube 31 and the second hollow tube 32 are not bound by the wound wire 52.

[0086] In the middle part 12 and the base end 13 along the axial direction of the medical device body 10, the first operating line 41 and the second operating line 42 are positioned opposite each other in the circumferential direction of the medical device body 10.

[0087] In this embodiment, for example, Figure 2 As shown, at the middle portion 12 of the medical device body 10, the first operating line 41 and the second operating line 42 are positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10, with the axis center of the medical device body 10 as a reference. Similarly, at the base end 13 of the medical device body 10 and the base end position 15a of the curved region 15, the first operating line 41 and the second operating line 42 are also positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10. That is, at the middle portion 12, the base end 13, and the base end position 15a of the curved region 15, the phase difference between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 is 180 degrees.

[0088] The phase difference between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 gradually decreases towards the front end in the curved region 15, and at the front end position 15b of the curved region 15, for example, the phase difference becomes almost zero. In this embodiment, the first operating line 41 and the second operating line 42 are each rotated 90 degrees in the circumferential direction of the medical device body 10 in the curved region 15.

[0089] However, the arrangement of the first operating line 41 and the second operating line 42 in a position opposite each other in the circumferential direction of the medical device body 10 is not limited to this example, but means that the first operating line 41 and the second operating line 42 are separated from each other by more than 120 degrees in the circumferential direction of the medical device body 10.

[0090] Furthermore, in this embodiment, at the middle portion 12, the base end portion 13, and the base end position 15a of the curved region 15 of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 are positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10, with the axial center of the medical device body 10 as a reference. That is, at the middle portion 12, the base end portion 13, and the base end position 15a of the curved region 15, the phase difference between the first hollow tube 31 and the second hollow tube 32 in the circumferential direction of the medical device body 10 is 180 degrees. This phase difference gradually decreases towards the front end side in the curved region 15.

[0091] The front end 11 of the medical device body 10 is provided with a ring-shaped marker 70 made of a non-radiotransmittable metallic material.

[0092] The marker 70 is coaxial with the lumen 21 and is positioned around the lumen 21.

[0093] Markers 70 are, for example, disposed around the braided layer 51.

[0094] The front end 41a of the first operating line 41 is fixed to the marker 70, for example, by a dotted solder, i.e., the first fixing part 71.

[0095] Similarly, the front end 42a of the second operating line 42 is fixed to the marker 70, for example, by a dotted solder, i.e., the first fixing part 71.

[0096] The first fixing part 71 and the second fixing part 72 are disposed, for example, at the end of the base side of the marker 70.

[0097] In this embodiment, the front end 41a of the first operation line 41 and the front end 42a of the second operation line 42 are connected to each other. That is, the front ends of the first operation line 41 and the second operation line 42 are connected to each other.

[0098] More specifically, the first fixing part 71 and the second fixing part 72 are adjacent to each other and in contact. That is, the first fixing part 71 and the second fixing part 72 are integrated.

[0099] In addition, the front end 41a and the front end 42a can also be fixed to the marker 70 by a fixing part.

[0100] Next, use Figure 6 and Figure 7 The hub 90 located at the base end of the medical device body 10 will be described.

[0101] The hub 90 has a connecting portion 93 for inserting an injector (not shown) from the base end of the hub 90. The outer periphery of the connecting portion 93 is formed with a threaded groove so that the injector can be fixed in a detachable manner.

[0102] The outer periphery of the hub 90 has two blade portions 92 that are opposite each other across the axis of the hub 90.

[0103] The front end of the hub 90 is inserted into and fixed to the base end of the medical device body 10. Thus, the cavity 21 inside the medical device body 10 is connected to the internal space of the hub 90.

[0104] By rotating the blade section 92 around the axis of the hub 90, torque operation can be performed to rotate the entire medical device body 10.

[0105] The front end of the hub 90 is connected to the frame 86 of the bending operation part 80, which will be described later.

[0106] Next, use Figure 6 and Figure 7 The bending operation part 80 of the medical device 100 will be described.

[0107] The medical device 100 includes a bending operation section 80, which is used to bend the front end 11 of the medical device body 10 by traction of the first operation line 41 and the second operation line 42.

[0108] The bending operation unit 80 is configured to include: a rotating member 81, which is supported by a shaft to be rotatable and engages with the first operation line 41 and the second operation line 42, and the base end of the first operation line 41 and the base end of the second operation line 42 are fixed thereon; and a moving mechanism that moves the rotating member 81 in the traction direction of the first operation line 41 and the second operation line 42 and in the opposite direction to the traction direction.

[0109] Rotating component 81 is, for example, a pulley.

[0110] In this specification, the ability of a component to rotate is not limited to rotating more than 360 degrees, but also includes the ability to swing within a specified angular range of less than 360 degrees.

[0111] like Figure 6 As shown, the rotating component 81 has a locking portion formed in a circular shape centered on the rotation center of the rotating component 81, in which the first operating line 41 and the second operating line 42 are engaged. Furthermore, the locking portion of the rotating component 81 is not limited to a circular shape, but may also be an arc shape.

[0112] Thus, the rotating component 81 has a engaging portion engaged by the first operating line 41 and the second operating line, and the engaging portion is formed in a circular shape or an arc shape centered on the rotation center of the rotating component 81.

[0113] The moving mechanism is configured to include a forward / reverse component 82 and a pinion 83.

[0114] The forward / backward component 82 includes: a holding portion 82a that holds the rotating component 81 so that it can rotate; and a rod-shaped portion 82b that extends from the holding portion 82a toward the base end of the medical device body 10.

[0115] The rod-shaped portion 82b is formed with a toothed portion 82c.

[0116] The bending operation unit 80 also includes: a frame 86, which is the main body of the bending operation unit 80; a knob operation unit 84, which is rotatably supported on the frame 86; a pinion 83, which is integrally formed with the knob operation unit 84; and a guide member 85, which is provided on the inner surface of the frame 86 and guides the rod-shaped portion 82b in the direction of the long side of the rod-shaped portion 82b (for example, a pair of front and rear guide members 85).

[0117] The base end 13 of the medical device body 10 passes through the interior of the frame 86 and is guided to the base end side of the frame 86, and is inserted and fixed to the front end of the hub 90.

[0118] The rotation axis of the knob operation part 84 extends orthogonally to the axis of the medical device body 10 within the frame 86.

[0119] The pinion 83 is integrally formed with the knob operation part 84 on one side and is coaxially configured with the rotation axis of the knob operation part 84.

[0120] The gear on the outer periphery of the pinion 83 meshes with the gear on the rack portion 82c of the forward / reverse component 82.

[0121] At least a portion of the knob operating part 84 is exposed outside the housing 86 so that an operator performing the operation of the medical device 100 can rotate the knob operating part 84 from outside the housing 86.

[0122] The first operating line 41 and the second operating line 42 are respectively led out from the main body 10 of the medical device within the frame 86.

[0123] The base end of the first operating line 41 is wound around the rotating member 81 one and a half turns, and the base end of the first operating line 41 passes through the first fixing part 81a ( Figure 6 It is fixed to the rotating component 81.

[0124] Similarly, the second operating line 42 is wound around the rotating component 81 one and a half turns, and the base end of the second operating line 42 passes through the second fixing part 81b ( Figure 6 It is fixed to the rotating component 81.

[0125] The winding directions of the first operating line 41 and the second operating line 42 of the rotating component 81 are opposite to each other, so the rotation angle of the rotating component 81 is automatically adjusted to an angle in which the tension of the first operating line 41 and the tension of the second operating line 42 are balanced.

[0126] The operator who operates the medical device 100 holds the frame 86 or the hub 90 to rotate the knob operating part 84. As a result, the pinion 83, which is integrated with the knob operating part 84, rotates on its axis. At the same time, the forward and backward part 82, which has a rack part 82c, moves forward (towards the front end of the medical device body 10) or backward (towards the base end of the medical device body 10) relative to the frame 86 in the axial direction of the medical device body 10.

[0127] Figure 6 In the process, by rotating the knob operation part 84 clockwise, the forward and backward part 82 and the rotating part 81 retract, and both the first operation line 41 and the second operation line 42 are pulled toward the base end of the medical device body 10.

[0128] Thus, the bending operation unit 80 has an operation receiving unit (knob operation unit 84) that receives the operation of the user (operator) and performs the operation. The power of the operation receiving unit is transmitted to the rotating member 81 via the moving mechanism, thereby causing the rotating member 81 to move in the aforementioned traction direction and in the opposite direction to the traction direction.

[0129] More specifically, as described above, the operation receiving unit (knob operation unit 84) is supported by a shaft to enable rotational operation, and the moving mechanism includes: a pinion 83, which is integrally and coaxially disposed with the operation receiving unit; and a rack member (forward and backward member 82), which moves forward and backward in conjunction with the rotation of the pinion 83. The rotating member 81 is supported by a shaft on the rack member.

[0130] Thus, by operating the bending operation section 80, the first operation line 41 and the second operation line 42 are pulled together.

[0131] Here, "the first operating line 41 and the second operating line 42 being pulled together" means that there is a moment when the first operating line 41 and the second operating line 42 are pulled together, and is not limited to the first operating line 41 and the second operating line 42 starting to be pulled at the same time, nor is it limited to the first operating line 41 and the second operating line 42 ending to be pulled at the same time.

[0132] For example, Figure 8 As shown in (a), when the front end 11 of the medical device body 10 is in a straight line shape, Figure 8(b) If the knob operation part 84 is rotated clockwise, the first operation line 41 and the second operation line 42 are pulled towards the base end of the medical device body 10, so the front end 11 of the medical device body 10 bends in one direction.

[0133] Additionally, if the knob operation section 84 is moved from... Figure 8 (b) When the state is rotated counterclockwise, the forward and backward component 82 and the rotating component 81 move forward, and the tension of the first operating line 41 and the second operating line 42 is relaxed, thus allowing the front end 11 of the medical device body 10 to return to a straight shape.

[0134] Thus, in this embodiment, the bending operation unit 80 is configured as follows: through a conversion mechanism consisting of a pinion 83 and a rack (rack part 82c), the operation performed by the user is received by the rotation mechanism (knob operation unit 84), and the force applied to the rotation mechanism is converted into axial forward and backward movement of the medical device body 10 by the operation.

[0135] Next, examples of materials used in each part of the medical device 100 will be explained.

[0136] As the material for the inner layer 22, resin materials such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroalkoxy fluoropolymer (PFA) can be used.

[0137] In addition to polyimide (PI), polyamide-imide (PAI), and polyethylene terephthalate (PET), other resin materials such as polyethylene (PE), polyamide (PA), nylon elastomer, polyurethane (PU), ethylene / vinyl acetate resin (EVA), polyvinyl chloride (PVC), or polypropylene (PP) can be used as the material for the outer layer 23.

[0138] For example, resin materials such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroalkoxy fluoropolymer (PFA) can be used as materials for the first hollow tube 31 and the second hollow tube 32.

[0139] The material of the wires constituting the braided layer 51 is preferably a metal such as stainless steel or tungsten, but it may also be a resin material.

[0140] The material of the wire constituting the winding wire 52 is preferably a metal material such as stainless steel or tungsten, but it may also be a resin material.

[0141] According to the medical device 100 of the first-1 embodiment described above, the front end 11 of the medical device body 10 can be bent by pulling both the first operating line 41 and the second operating line 42. At this time, a balance can be achieved between the load pulled by the first operating line 41 and the load pulled by the second operating line 42 on the front end 11 of the medical device body 10. Therefore, it is possible to suppress the phenomenon that the medical device body 10 rotates around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0142] Therefore, the front end 11 of the medical device body 10 can be bent in the desired direction more reliably.

[0143] [Implementation Method 1-2]

[0144] Next, use Figures 9 to 11 (b) The medical device 100 according to the first and second embodiments will be described.

[0145] Figure 11 (a) and Figure 11 (b) is used to explain along Figure 10 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 11 (a) indicates the state before bending. Figure 11 (b) indicates a bent state.

[0146] The medical device 100 described in this embodiment differs from the medical device 100 described in the first-1 embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the first-1 embodiment.

[0147] In this embodiment, a parallel region 16 is formed between the front end (front end position 15b) of the curved region 15 and the front ends 41a and 42a of the first operation line 41 and the second operation line 42, where the first operation line 41 and the second operation line 42 are close to each other and extend side by side.

[0148] That is, the medical device body 10 is configured to include a resin tube 20 having a lumen 21. A first operating line 41 and a second operating line 42 are inserted around the lumen 21 of the resin tube 20. At the front end (front end position 15b) of a curved region 15 in which the first operating line 41 and the second operating line 42 bend toward the front end side and gradually approach each other in the circumferential direction of the medical device body 10, the first operating line 41 and the second operating line 42 approach each other at a distance less than the wall thickness of the resin tube 20. Between the front end (front end position 15b) of the curved region 15 and the front ends 41a and 42a of the first operating line 41 and the second operating line 42, a parallel region 16 is formed in which the first operating line 41 and the second operating line 42 approach each other and extend side by side.

[0149] In the parallel region 16, the first hollow tube 31 and the second hollow tube 32 abut against or approach each other and extend side by side.

[0150] More specifically, in this embodiment, the medical device 100 also includes an annular component 60 embedded in the resin tube 20 at the front end of the curved region 15.

[0151] The annular component 60 is configured to have higher rigidity than the resin tube 20, and its outer diameter is smaller than the wall thickness of the resin tube 20 (see reference). Figure 10 ).

[0152] Furthermore, the first operating line 41 and the second operating line 42 are inserted through the annular component 60.

[0153] Therefore, it is possible to more reliably suppress changes in the paths of the first operating line 41 and the second operating line 42.

[0154] More specifically, in this embodiment, the first hollow tube 31 and the second hollow tube 32 are inserted through the annular component 60.

[0155] That is, the main body 10 of the medical device is configured to include a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20 and respectively inserted through the first operating line 41 and the second operating line 42, and the first hollow tube 31 and the second hollow tube 32 inserted in the annular component 60. In the bending region 15, the first hollow tube 31 and the second hollow tube 32 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the main body 10 of the medical device.

[0156] The material of the annular component 60 is not particularly limited, but the annular component 60 can be made of, for example, metal or hard resin.

[0157] In this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to achieve the following: Figure 11 (a) and Figure 11 As shown in (b), the front end 11 of the medical device body 10 is bent.

[0158] At this point, the bending angle in the parallel region 16 becomes steeper compared to the bending angle in the bending region 15.

[0159] As an example, along the axial direction of the medical device body 10, the distance from the base end (base end position 15a) to the front end (front end position 15b) of the curved region 15 is... Figure 9 Compared to the distance L1 shown, the distance from the front end of the curved region 15 (front end position 15b) to the front ends 41a and 42a of the first operating line 41 and the second operating line 42 is ( Figure 9 The distance shown (L2) is longer.

[0160] Based on these structures, the front end 11 can be bent more easily.

[0161] Furthermore, the bending of the front end portion 11 can be mainly generated in the parallel region 16. Therefore, regardless of the bending angle of the front end portion 11, the friction between the first operating line 41 and the first hollow tube 31, and the friction between the second operating line 42 and the second hollow tube 32 in the bending region 15 can be kept substantially constant. Thus, regardless of the bending angle of the front end portion 11, the magnitude of the force required to pull the first operating line 41 and the second operating line 42 can be kept substantially constant.

[0162] Furthermore, as another example, along the axial direction of the medical device body 10, the distance from the base end (base end position 15a) to the front end (front end position 15b) of the curved region 15 ( Figure 9 The distance L1 shown is greater than the distance from the front end of the curved region 15 (front end position 15b) to the front ends 41a and 42a of the first operating line 41 and the second operating line 42. Figure 9 The distance shown (L2) is longer.

[0163] Based on these structures, the bending of the front end 11 can be suppressed to a certain extent.

[0164] Furthermore, it can mitigate the bending of the first operating line 41 and the second operating line 42, and the first hollow tube 31 and the second hollow tube 32 in the bending region 15, thereby reducing the friction between the first operating line 41 and the first hollow tube 31, and the friction between the second operating line 42 and the second hollow tube 32 in the bending region 15.

[0165] Furthermore, the length region in which the first hollow tube 31 and the second hollow tube 32 are close to each other and run parallel in the front end 11 of the medical device body 10, i.e., the length region with high rigidity, is shortened. Therefore, good selectivity (good vascular selectivity, etc.) is obtained when the front end 11 of the medical device body 10 is bent to enter the branch cavity.

[0166] Alternatively, distances L1 and L2 can be the same. In this case, a good balance can be achieved in the smoothness of traction of the first operating line 41 and the second operating line 42, as well as good selectivity when the front end 11 of the medical device body 10 bends and enters the branch cavity.

[0167] [Implementation Methods 1-3]

[0168] Next, use Figures 12 to 18 (c) The medical device 100 according to the first to third embodiments will be described.

[0169] Figure 16 (a) and Figure 16(b) is used to explain along Figure 15 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 16 (a) indicates the state before bending. Figure 16 (b) indicates a bent state.

[0170] Figure 16 (c) and Figure 16 (d) is used to explain along Figure 15 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow B. Figure 16 (c) indicates the state before bending. Figure 16 (d) indicates a bent state.

[0171] Figure 18 (a) Figure 18 (b) and Figure 18 In (c), the middle portion of the main body 10 of the medical device is broken off and omitted along its long side. Figure 18 (a) Figure 8 (b) and Figure 18 In the medical device body 10 shown in (c), the rotational phases around the axis of the medical device body 10 differ by 90 degrees in the portion closer to the base end and the portion closer to the front end than the omitted portion.

[0172] The medical device 100 described in this embodiment differs from the medical device 100 described in the first and second embodiments in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the first and second embodiments.

[0173] The medical device 100 according to this embodiment includes a third operating line 43 and a fourth operating line 44 respectively inserted along the axial direction of the medical device body 10. The third operating line 43 and the fourth operating line 44 are made of fine wires such as metal or resin, just like the first operating line 41 and the second operating line 42.

[0174] The main body 10 of the medical device also includes a third hollow tube 33 and a fourth hollow tube 34 embedded in the resin tube 20. A third operating line 43 is inserted through the third hollow tube 33, and a fourth operating line 44 is inserted through the fourth hollow tube 34.

[0175] The third hollow tube 33 and the fourth hollow tube 34 are the same secondary lumen hoses as the first hollow tube 31 and the second hollow tube 32. The inner lumen of these secondary lumen hoses is a secondary lumen. That is, each operating line (the third operating line 43 and the fourth operating line 44) is inserted into the secondary lumen.

[0176] The inner diameters of the third hollow tube 33 and the fourth hollow tube 34 are smaller than the inner diameter of the lumen 21.

[0177] In this embodiment, at the middle portion 12 of the medical device body 10, the first hollow tube 31 and the third hollow tube 33 are close to or abut against each other and extend side by side, and the second hollow tube 32 and the fourth hollow tube 34 are close to or abut against each other and extend side by side (see reference). Figure 13 ).

[0178] Similarly, at the base end of the medical device body 10, the first hollow tube 31 and the third hollow tube 33 are close to or abut against each other and extend side by side, and the second hollow tube 32 and the fourth hollow tube 34 are close to or abut against each other and extend side by side.

[0179] In the curved region 15 of the front end 11 of the medical device body 10, the third hollow tube 33 and the fourth hollow tube 34 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10. As a result, the third operating line 43 in the third hollow tube 33 and the fourth operating line 44 in the fourth hollow tube 34 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0180] In the curved region 15, the direction of the bending of the third hollow tube 33 and the third operating line 43 is symmetrical to the direction of the bending of the first hollow tube 31 and the first operating line 41.

[0181] Similarly, in the curved region 15, the direction of curvature of the fourth hollow tube 34 and the fourth operating line 44 is symmetrical to the direction of curvature of the second hollow tube 32 and the second operating line 42.

[0182] Furthermore, none of the hollow tubes (first hollow tube 31, second hollow tube 32, third hollow tube 33 and fourth hollow tube 34) intersect with other hollow tubes. Also, none of the operating lines (first operating line 41, second operating line 42, third operating line 43 and fourth operating line 44) intersect with other operating lines.

[0183] In parallel region 16, similarly to the first operating line 41 and the second operating line 42, which are close to each other and extend side by side, the third operating line 43 and the fourth operating line 44 are close to each other and extend side by side.

[0184] Furthermore, in the parallel region 16, similarly to the first hollow tube 31 and the second hollow tube 32, which abut against or approach each other and extend side by side, the third hollow tube 33 and the fourth hollow tube 34 abut against or approach each other and extend side by side.

[0185] The tip 43a of the third operating line 43 protrudes from the tip of the third hollow tube 33. Similarly, the tip 44a of the fourth operating line 44 protrudes from the tip of the fourth hollow tube 34.

[0186] The front end 43a of the third operating line 43 is fixed to the marker 70, for example, by a dotted solder, i.e., the third fixing part 73. Figure 15 ).

[0187] Similarly, the front end 44a of the fourth operating line 44 is fixed to the marker 70, for example, by a dotted solder, i.e., the fourth fixing part 74.

[0188] The third fixing part 73 and the fourth fixing part 74 are disposed, for example, at the end of the base side of the marker 70.

[0189] The regions where the third fixing part 73 and the fourth fixing part 74 are arranged and the regions where the first fixing part 71 and the second fixing part 72 are arranged are opposite each other in the circumferential direction of the medical device body 10.

[0190] In this embodiment, the front end 43a of the third operation line 43 and the front end 44a of the fourth operation line 44 are connected to each other. That is, the front ends of the third operation line 43 and the fourth operation line 44 are connected to each other.

[0191] More specifically, the third fixing part 73 and the fourth fixing part 74 are adjacent to each other and in contact. That is, the third fixing part 73 and the fourth fixing part 74 are integrated.

[0192] In addition, the front end 43a and the front end 44a can also be fixed to the marker 70 by a fixing part.

[0193] like Figure 14 As shown, in this embodiment, the medical device 100 has a first annular member 61 embedded in the resin tube 20 at the front end of the curved region 15, instead of the annular member 60. The first annular member 61 is the same as the annular member 60 in the first- and second embodiments, and a first hollow tube 31 and a second hollow tube 32 are inserted through the first annular member 61.

[0194] Furthermore, in this embodiment, the medical device 100 includes a second annular member 62 embedded in the resin tube 20 at the front end of the curved region 15. The second annular member 62 is the same as the first annular member 61. A third hollow tube 33 and a fourth hollow tube 34 are inserted through the second annular member 62.

[0195] The first annular component 61 and the second annular component 62 are arranged opposite each other in the circumferential direction of the medical device body 10.

[0196] In this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to achieve the following: Figure 16 (a) and Figure 16 As shown in (b), the front end 11 of the medical device body 10 is bent in one direction.

[0197] Furthermore, in this embodiment, by pulling both the third operating line 43 and the fourth operating line 44, it is possible to achieve the following: Figure 16 (c) and Figure 16 As shown in (d), the front end 11 of the medical device body 10 is bent in a direction opposite to the aforementioned direction.

[0198] like Figure 17 and Figure 18 As shown in (a), in this embodiment, the bending operation unit 80 includes: a first bending operation unit 180 for bending the front end portion 11 of the medical device body 10 by traction of the first operation line 41 and the second operation line 42; and a second bending operation unit 280 for bending the front end portion 11 of the medical device body 10 by traction of the third operation line 43 and the fourth operation line 44.

[0199] The first bending operation unit 180 includes a first rotating member 181, a first forward / reverse member 182, a first pinion 183, a first knob operation unit 184, and a first guide member 185. The first rotating member 181, the first forward / reverse member 182, the first pinion 183, the first knob operation unit 184, and the first guide member 185 respectively correspond to the rotating member 81, the forward / reverse member 82, the pinion 83, the knob operation unit 84, and the guide member 85 described in the first-1 embodiment.

[0200] Therefore, the first forward / backward component 182 has a first holding portion 182a, a first rod-shaped portion 182b, and a first rack portion 182c, which respectively correspond to the holding portion 82a, the rod-shaped portion 82b, and the rack portion 82c.

[0201] In the first embodiment, the first operating line 41 and the second operating line 42 are wound and fixed on the first rotating member 81 in the same manner as the first operating line 41 and the second operating line 42 are wound and fixed on the rotating member 81.

[0202] The second bending operation unit 280 includes a second rotating member 281, a second forward / reverse member 282, a second pinion 283, a second knob operation unit 284, and a second guide member 285. The second rotating member 281, the second forward / reverse member 282, the second pinion 283, the second knob operation unit 284, and the second guide member 285 are the same as the first rotating member 181, the first forward / reverse member 182, the first pinion 183, the first knob operation unit 184, and the first guide member 185.

[0203] The second forward / backward component 282 has a second retaining portion 282a, a second rod-shaped portion 282b, and a second rack portion 282c that are identical to the first retaining portion 182a, the first rod-shaped portion 182b, and the first rack portion 182c.

[0204] Similarly, the third operating line 43 and the fourth operating line 44 are wound and fixed on the first rotating component 181, just as the first operating line 41 and the second operating line 42 are wound and fixed on the second rotating component 281.

[0205] For example, the second bending operation unit 280 in Figure 17 The middle part is configured to be symmetrical about the top and bottom relative to the first bending operation part 180.

[0206] In this embodiment, rotating the first knob operating part 184 causes the first forward / backward member 182 and the first rotating member 181 to retract, thereby pulling the first operating line 41 and the second operating line 42, which in turn causes the front end 11 of the medical device body 10 to bend in one direction. Figure 18 (b)).

[0207] Furthermore, rotating the second knob operating part 284 causes the second forward / backward component 282 and the second rotating component 281 to retract, thereby pulling the third operating line 43 and the fourth operating line 44, causing the front end 11 of the medical device body 10 to bend in the opposite direction to the aforementioned direction. Figure 18 (c)).

[0208] Thus, in this embodiment, the medical device 100 includes a second bending operation section 280, which is used to bend the front end 11 of the medical device body 10 in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the traction of the third operation line 43 and the fourth operation line 44.

[0209] At the middle portion 12 and the base end of the medical device body 10 in the axial direction, the third operating line 43 and the fourth operating line 44 are separated from each other and extend side by side in the circumferential direction of the medical device body 10. At the front end 11 in the axial direction of the medical device body 10, the third operating line 43 and the fourth operating line 44 bend towards the front end side and gradually approach each other in the circumferential direction of the medical device body 10 and then merge.

[0210] Furthermore, by operating the second bending operation unit 280, the third operation line 43 and the fourth operation line 44 are pulled together.

[0211] The second bending operation unit 280 is configured to include: a second rotating member 281, which is supported by a shaft to be rotatable and engages with the third operation line 43 and the fourth operation line 44, and the base end of the third operation line 43 and the base end of the fourth operation line 44 are fixed thereon; and a second moving mechanism that moves the second rotating member 281 in a second traction direction for traction of the third operation line 43 and the fourth operation line 44 and in a direction opposite to the second traction direction.

[0212] The second rotating member 281 has a second engaging portion engaged by the third operating line 43 and the fourth operating line 44. The second engaging portion is formed in a circular shape or an arc shape centered on the rotation center of the second rotating member 281.

[0213] The second bending operation unit 280 has a second operation receiving unit (second knob operation unit 284) that receives the user's operation and performs the operation. The power of the second operation receiving unit is transmitted to the second rotating member 281 via the second moving mechanism, thereby causing the second rotating member 281 to move in the second traction direction and in the opposite direction to the second traction direction.

[0214] The second operation receiving unit (second knob operation unit 284) is supported by a shaft and is capable of rotational operation. The second moving mechanism includes: a second pinion 283, which is integrally and coaxially disposed with the second operation receiving unit; and a second rack member (second forward / backward member 282), which moves forward and backward in conjunction with the rotation of the second pinion 283. The second rotating member 281 is supported by a shaft on the second rack member.

[0215] [Implementation Methods 1-4]

[0216] Next, use Figure 19 (a) and Figure 19 (b) The medical device 100 according to embodiments 1-4 will be described.

[0217] The medical device 100 described in this embodiment differs from the medical device 100 described in the first-1 embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the first-1 embodiment.

[0218] In this embodiment, a flexible portion 110 with high local flexibility is formed in the circumferential direction of the front end portion 11 of the medical device body 10, in the region between the first operation line 41 and the second operation line 42, or in the region on the opposite side of the region separated from the axis of the medical device body 10.

[0219] As a result, the flexibility of the front end 11 is improved, thereby reducing the tension acting on the first operating line 41 and the second operating line 42 during bending operations. As a result, it is possible to further suppress the phenomenon of the medical device body 10 rotating around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0220] More specifically, such as Figure 19As shown in (b), a bendable portion 110 is formed in two regions on the circumferential direction of the front end portion 11 of the medical device body 10: the region between the first operating line 41 and the second operating line 42, and the region on the opposite side of the region, which is separated from the axis of the medical device body 10.

[0221] As a result, the flexibility of the front end 11 is further improved.

[0222] The bendable portion 110 is configured to include a notch-shaped portion 111 formed on the outer surface of the medical device body 10.

[0223] For example, the notch shape 111 Figure 19 (b) shows a shape that can be set to be concave and arc-shaped.

[0224] This allows the front end 11 to bend more steeply.

[0225] [Implementation Methods 1-5]

[0226] Next, use Figure 20 (a) and Figure 20 (b) The medical device 100 according to embodiments 1-5 will be described.

[0227] The medical device 100 described in this embodiment differs from the medical device 100 described in the first-1 embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the first-1 embodiment.

[0228] In this embodiment, a flexible portion 110 with high local flexibility is formed in the circumferential direction of the front end portion 11 of the medical device body 10, in the region between the first operation line 41 and the second operation line 42, or in the region on the opposite side of the region separated from the axis of the medical device body 10.

[0229] As a result, the flexibility of the front end 11 is improved, thereby reducing the tension acting on the first operating line 41 and the second operating line 42 during bending operations. As a result, it is possible to further suppress the phenomenon of the medical device body 10 rotating around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0230] More specifically, such as Figure 20 As shown in (b), a bendable portion 110 is formed in the circumferential direction of the front end 11 of the medical device body 10 in the region between the first operating line 41 and the second operating line 42, while no bendable portion 110 is formed in the region on the opposite side of the region where the axis of the medical device body 10 is located.

[0231] However, the flexible portion 110 may also be formed in two regions: one in the circumferential direction of the front end portion 11 of the medical device body 10, in the region between the first operating line 41 and the second operating line 42, and the other in the region on the opposite side of the region, separated by the axis of the medical device body 10.

[0232] The bendable portion 110 is configured to include a notch-shaped portion 111 formed on the outer surface of the medical device body 10.

[0233] In this embodiment, the medical device body 10 has a plurality of notch-shaped portions 111 arranged adjacent to each other in the axial direction of the medical device body 10. These notch-shaped portions 111 are elongated in the circumferential direction of the medical device body 10 and have a wedge-shaped cross-section.

[0234] In this embodiment, the front end 11 of the medical device body 10 is easy to bend in the initial stage of bending, but if a certain degree of bending angle is reached, the wedge-shaped inclined surfaces come into contact with each other, making it difficult to bend further (if a certain degree of bending angle is reached, the rigidity becomes higher).

[0235] Therefore, the front end 11 of the medical device body 10 has good resistance to deformation under axial compression when pushed into the body cavity, thus the medical device 100 has good vascular selectivity.

[0236] [Implementation Methods 1-6]

[0237] Next, use Figure 21 The first to sixth embodiments will be described.

[0238] The medical device 100 described in this embodiment differs from the medical device 100 described in the first to third embodiments in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the first to third embodiments.

[0239] In this embodiment, as will be explained below, the structure of the bending operation section 80 is different from that in the first to third embodiments described above.

[0240] In this embodiment, the bending operation unit 80 includes a frame 86, a first rotating member 181, a second rotating member 281, a knob operation unit 194 (a third rotating member), a first connecting line 192 connecting the first rotating member 181 and the knob operation unit 194, and a second connecting line 193 connecting the second rotating member 281 and the knob operation unit 194.

[0241] The first rotating component 181 and the second rotating component 281 are, for example, pulleys.

[0242] The rotation axis of the first rotating component 181 is, for example, in the direction relative to the axis of the medical device body 10 within the frame 86. Figure 21 Extend in a direction that is orthogonal to the left and right directions in the middle.

[0243] The rotation axis of the first rotating component 181 is held by the frame 86 so that it can rotate about the axis and is in the axial direction of the medical device body 10 within the frame 86. Figure 21 It can move relative to the frame 86 in the left-right direction. For example, the rotation axis of the first rotating member 181 is supported by an elongated hole (not shown) formed in the frame 86.

[0244] Similarly, the rotation axis of the second rotating component 281 extends, for example, in a direction orthogonal to the axial direction of the medical device body 10 within the frame 86. The rotation axis of the second rotating component 281 is held by the frame 86 so that it can rotate about the axis of rotation and can move relative to the frame 86 in the axial direction of the medical device body 10 within the frame 86.

[0245] As an example, the rotation axis of the first rotating component 181 and the rotation axis of the second rotating component 281 are parallel to each other. However, these rotation axes may not be parallel to each other.

[0246] The first operating line 41, the second operating line 42, the third operating line 43 and the fourth operating line 44 are respectively led out from the main body 10 of the medical device within the frame 86.

[0247] The base end of the first operating line 41 is wound around the first rotating member 181 for example, one and a half turns, and the base end of the first operating line 41 is fixed to the first rotating member 181. Similarly, the second operating line 42 is wound around the first rotating member 181 for example, one and a half turns, and the base end of the second operating line 42 is fixed to the first rotating member 181. The winding directions of the first operating line 41 and the second operating line 42 relative to the first rotating member 181 are opposite to each other. Therefore, the rotation angle of the first rotating member 181 is automatically adjusted to an angle that balances the tension of the first operating line 41 and the tension of the second operating line 42.

[0248] The base end of the third operating line 43 is wound around the second rotating member 281 for example, one and a half turns, and the base end of the third operating line 43 is fixed to the second rotating member 281. Similarly, the fourth operating line 44 is wound around the second rotating member 281 for example, one and a half turns, and the base end of the fourth operating line 44 is fixed to the second rotating member 281. The winding directions of the third operating line 43 and the fourth operating line 44 relative to the second rotating member 281 are opposite to each other. Therefore, the rotation angle of the second rotating member 281 is automatically adjusted to an angle that balances the tension of the third operating line 43 and the tension of the fourth operating line 44.

[0249] The knob operating part 194 is supported by an axis so that it can rotate relative to the frame 86. The rotation axis of the knob operating part 194 extends in a direction orthogonal to the axis of the medical device body 10 within the frame 86.

[0250] As an example, the rotation axis of the knob operation section 194 is parallel to the rotation axis of the first rotating member 181 and the rotation axis of the second rotating member 281. However, the rotation axis of the knob operation section 194 may also be non-parallel to the rotation axis of the first rotating member 181 and the rotation axis of the second rotating member 281.

[0251] At least a portion of the knob operating part 194 is exposed outside the housing 86 so that an operator performing the operation of the medical device 100 can rotate the knob operating part 194 from outside the housing 86.

[0252] The knob operation section 194 includes, for example, a main body formed in the shape of a disc and a winding section 191 fixed to one side of the main body.

[0253] The winding section 191 is, for example, a cylindrical spool. The winding section 191 is coaxially arranged with the rotation axis of the knob operation section 194.

[0254] The front end of the first connecting wire 192 is connected to the rotation axis of the first rotating component 181. The base end of the first connecting wire 192 is wound around the winding portion 191 one and a half turns, and the base end of the first connecting wire 192 is fixed to the winding portion 191 at the first connecting portion 195.

[0255] Similarly, the front end of the second connecting line 193 is connected to the rotation axis of the second rotating component 281. The base end of the second connecting line 193 is wound around the winding portion 191 one and a half turns, and the base end of the second connecting line 193 is fixed to the winding portion 191 at the second connecting portion 196.

[0256] The winding direction of the first connecting line 192 relative to the winding section 191 and the winding direction of the second connecting line 193 are opposite to each other.

[0257] In this embodiment, the operator operating the medical device 100 holds the frame 86 or the hub 90 to rotate the knob operation part 194, thereby selectively winding the first connecting wire 192 or the second connecting wire 193 around the winding part 191, and thus selectively pulling the first rotating member 181 or the second rotating member 281 toward the base end side.

[0258] That is, the knob operating part 194 was made to... Figure 21During the clockwise rotation operation, the first connecting line 192 is wound around the winding part 191, thus the first rotating member 181 is pulled towards the base end. As a result, both the first operating line 41 and the second operating line 42 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in one direction.

[0259] Furthermore, the knob operating section 194 was made to... Figure 21 During the counterclockwise rotation operation, the second connecting line 193 is wound around the winding part 191, thus the second rotating member 281 is pulled towards the base end. As a result, both the third operating line 43 and the fourth operating line 44 are pulled towards the base end of the medical device body 10, thus the front end 11 of the medical device body 10 bends in the opposite direction to the aforementioned direction.

[0260] That is, by operating a knob operation unit 194, it is possible to operate both the first operation line 41 and the second operation line 42, and to operate both the third operation line 43 and the fourth operation line 44.

[0261] Thus, the medical device 100 according to this embodiment has a third operating line 43 and a fourth operating line 44 respectively inserted along the axial direction of the medical device body 10. At the middle portion 12 and the base end portion 13 in the axial direction of the medical device body 10, the third operating line 43 and the fourth operating line 44 are separated from each other and extend side by side in the circumferential direction of the medical device body 10. At the front end portion 11 in the axial direction of the medical device body 10, the third operating line 43 and the fourth operating line 44 bend and converge toward the front end side in a manner that brings them closer to each other in the circumferential direction of the medical device body 10.

[0262] Furthermore, by operating the bending operation section 80 to pull the third operation line 43 and the fourth operation line 44, the front end 11 of the medical device body 10 can be bent in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the traction of the first operation line 41 and the second operation line 42.

[0263] More specifically, the bending operation unit 80 includes a first rotating member 181, a second rotating member 281, and a third rotating member (knob operation unit 194) that are rotatable and supported by shafts. The rotation shaft of the first rotating member 181 is connected to the first connection portion 195 in the third rotating member, and the rotation shaft of the second rotating member 281 is connected to the second connection portion 196 in the third rotating member.

[0264] Furthermore, the base end of the first operating line 41 and the base end of the second operating line 42 are fixed on the first rotating component 181, and the base end of the third operating line 43 and the base end of the fourth operating line 44 are fixed on the second rotating component 281.

[0265] Furthermore, the third rotating component rotates in one direction, thereby pulling the first rotating component 181 and the first operating line 41 and the second operating line 42, thus bending the front end 11 of the medical device body 10. The third rotating component rotates in the opposite direction to the aforementioned direction, thereby pulling the second rotating component 281 and the third operating line 43 and the fourth operating line 44, thus bending the front end 11 of the medical device body 10 in a direction different from (e.g., the opposite direction) to the bending direction of the front end 11 of the medical device body 10 based on the pulling of the first operating line 41 and the second operating line 42.

[0266] Furthermore, in embodiments 1-6, examples were described in which the rotation axis of the first rotating member 181 is connected to the third rotating member (knob operation part 194) via a line (first connecting line 192), and the rotation axis of the second rotating member 281 is connected to the third rotating member via a line (second connecting line 193), but the present invention is not limited to these examples.

[0267] For example, the rotation axis of the first rotating member 181 may be directly supported by the first connecting portion in the third rotating member, and the rotation axis of the second rotating member 281 may be directly supported by the second connecting portion in the third rotating member. In this case, the third connecting member does not need to have the aforementioned winding portion 191.

[0268] [Implementation Methods 1-7]

[0269] Next, use Figure 22 The first to seventh embodiments will be described.

[0270] The medical device 100 described in this embodiment differs from the medical device 100 described in embodiments 1-6 in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in embodiments 1-6.

[0271] In this embodiment, as will be explained below, the structure of the bending operation part 80 is different from that in the embodiments described in 1-6 above.

[0272] In this embodiment, the bending operation section 80 does not have the following features: Figure 21 The winding section 191, the first connecting line 192, and the second connecting line 193 are shown. Instead, the bending operation section 80 includes... Figure 22 The pinion 197, the first rack component 198, the second rack component 199, and the guide 200 are shown.

[0273] The pinion 197 is integrally formed with the knob operation section 194 on one side of the disc-shaped knob operation section 194 and is coaxially configured with the rotation axis of the knob operation section 194.

[0274] The first rack component 198 is a rod-shaped component extending in the axial direction of the medical device body 10 within the frame 86. At the front end of the first rack component 198, the first rotating component 181 is supported by a shaft to enable rotation. A rack is formed on one side surface of the first rack component 198 to mesh with a gear on the outer periphery of the pinion 197.

[0275] The bending operation section 80 includes, for example, a pair of front and rear guides 200 provided corresponding to the first rack member 198. Through these guides 200, the first rack member 198 is guided to move forward and backward in a straight line in the axial direction of the medical device body 10 within the frame 86.

[0276] Similarly, the second rack component 199 is a rod-shaped component extending in the axial direction of the medical device body 10 within the frame 86. At the front end of the second rack component 199, the second rotating component 281 is supported by a shaft to enable rotation. One side of the second rack component 199 has a rack that meshes with the gear on the outer periphery of the pinion 197.

[0277] The bending operation section 80 includes, for example, a pair of front and rear guides 200 provided corresponding to the second rack member 199. Through these guides 200, the second rack member 199 is guided to move forward and backward in a straight line in the axial direction of the medical device body 10 within the frame 86.

[0278] In this embodiment, the methods for engaging and fixing the first rotating member 181 with the first operating line 41 and the second operating line 42, and the methods for engaging and fixing the second rotating member 281 with the third operating line 43 and the fourth operating line 44, are the same as in embodiments 1-6.

[0279] Therefore, the rotation angle of the first rotating component 181 is automatically adjusted to a balanced angle between the tension of the first operating line 41 and the tension of the second operating line 42, and the rotation angle of the second rotating component 281 is automatically adjusted to a balanced angle between the tension of the third operating line 43 and the tension of the fourth operating line 44.

[0280] In this embodiment, the operator operating the medical device 100 holds the frame 86 or the hub 90 and rotates the knob operating part 194, thereby selectively moving the first rack member 198 or the second rack member 199, which respectively meshes with the pinion 197, toward the base end side.

[0281] That is, the knob operating part 194 was made to... Figure 22During the clockwise rotation operation, the first rack component 198 moves (retracts) towards the base end, thus pulling the first rotating component 181 towards the base end. As a result, both the first operating line 41 and the second operating line 42 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in one direction.

[0282] Furthermore, the knob operating section 194 was made to... Figure 22 During the counterclockwise rotation operation, the second rack component 199 moves (retracts) towards the base end, thus pulling the second rotating component 281 towards the base end. Consequently, both the third operating line 43 and the fourth operating line 44 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in the opposite direction to the aforementioned direction.

[0283] In addition, when the first rack component 198 moves toward the base end side, the second rack component 199 moves toward the front end side, and when the second rack component 199 moves toward the base end side, the first rack component 198 moves toward the front end side.

[0284] Thus, in this embodiment, the bending operation unit 80 includes: a first rotating member 181, a second rotating member 281, and a third rotating member (knob operation unit 194) that are rotatable and supported by shafts; a pinion 197 that is integrally and coaxially disposed with the third rotating member; a first rack member 198 that is connected to the rotation shaft of the first rotating member 181 and moves forward and backward in conjunction with the rotation of the pinion 197; and a second rack member 199 that is connected to the rotation shaft of the second rotating member 281 and moves forward and backward in conjunction with the rotation of the pinion 197 in a direction that is always opposite to the forward and backward direction of the first rack member 198.

[0285] The first rotating component 181 has the base end of the first operating line 41 and the base end of the second operating line 42 fixed on it, and the second rotating component 281 has the base end of the third operating line 43 and the base end of the fourth operating line 44 fixed on it.

[0286] The third rotating component (knob operation part 194) rotates in one direction, thereby pulling the first rotating component 181 via the first rack component 198, and pulling the first operation line 41 and the second operation line 42, thereby bending the front end 11 of the medical device body 10.

[0287] Furthermore, the third rotating component rotates in the opposite direction to the aforementioned direction, thereby pulling the second rotating component 281 via the second rack component 199, and pulling the third operating line 43 and the fourth operating line 44, thereby bending the front end 11 of the medical device body 10 in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the pulling of the first operating line 41 and the second operating line 42.

[0288] The embodiments have been described above with reference to the accompanying drawings, but these are merely examples of the present invention, and various structures other than those described above may also be employed.

[0289] In the first embodiment described above, the rotating mechanism of the bending operation part 80 is an example of a knob operation part 84, but the rotating mechanism of the bending operation part 80 may also be a mechanism other than a knob operation part 84 (e.g., a rotary handle).

[0290] Furthermore, in the first-to-first embodiment described above, the conversion mechanism of the bending operation unit 80 was configured to include a rack (rack part 82c) and a pinion 83. However, the bending operation unit 80 may also be configured to include other conversion mechanisms (such as a cam, a linkage mechanism, or a guide with a pin and a groove).

[0291] The same applies to other implementation methods.

[0292] Furthermore, in the above embodiments, examples have been described where the first operating line 41 and the second operating line 42 are composed of different thin lines. However, the first operating line 41 and the second operating line 42 may also be composed of a portion of a single thin line. That is, the single thin line may be folded back at the front ends 41a and 42a.

[0293] Similarly, the example described above of the third operating line 43 and the fourth operating line 44 being composed of different thin lines has been illustrated, but the third operating line 43 and the fourth operating line 44 may also be composed of a portion of a single thin line. That is, the single thin line may be folded back at the front ends 43a and 44a.

[0294] Furthermore, in the above embodiments, examples have been described in which the base end of the first operation line 41 and the base end of the second operation line 42 are individually fixed to the bending operation section 80. However, the base end of the first operation line 41 and the base end of the second operation line 42 may also be connected and looped in the bending operation section 80 (for example, looping in the part that engages with the rotating member 81).

[0295] Similarly, the example described above, where the base ends of the third operating line 43 and the fourth operating line 44 are individually fixed to the second bending operating section 280, can also be connected and looped in the second bending operating section 280 (for example, looping in the part that engages with the second rotating member 281).

[0296] In the above-described embodiments 1-3 ( Figure 17 , Figure 18 (a) Figure 18 (b) Figure 18 In (c), an example was described in which the first knob operation part 184 and the second knob operation part 284 are arranged to overlap each other in a direction orthogonal to their plate surfaces, and the rotation axis of the first knob operation part 184 and the rotation axis of the second knob operation part 284 are arranged to be coaxial with each other, but the present invention is not limited to this example.

[0297] For example, the rotation axis of the first knob operation unit 184 and the rotation axis of the second knob operation unit 284 may be configured on different axes. For example, the first knob operation unit 184 and the second knob operation unit 284 may also be configured at different positions in the axial direction of the medical device body 10.

[0298] [Implementation Method 2-1]

[0299] First, use Figures 1 to 8 (b) The second-1 embodiment will be described.

[0300] in addition, Figure 1 It is along Figure 2 A sectional view cut along line AA.

[0301] Figure 5 (a) and Figure 5 (b) is used to explain along Figure 4 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 5 (a) indicates the state before bending. Figure 5 (b) indicates a bent state.

[0302] Figure 7 In the middle, the internal structure of the frame 86 of the bending operation part 80 is shown by partially breaking the frame 86.

[0303] Figure 8 (a) Figure 8 In (b), the middle part of the long side of the main body 10 of the medical device is broken and omitted. Figure 8 (a) and Figure 8(b) In the medical device body 10 shown, the rotational phases around the axis of the medical device body 10 differ by 90 degrees in the portion closer to the base end and the portion closer to the front end than the omitted portion.

[0304] like Figures 1 to 8 As shown in any of the figures in (b), the medical device 100 according to this embodiment includes: an elongated medical device body 10; a first operating line 41 and a second operating line 42, respectively inserted along the axial direction of the medical device body 10; and a bent operating portion 80. Figure 6 , Figure 7 ( ), used for bending the front end 11 of the medical device body 10 by traction through the first operating line 41 and the second operating line 42.

[0305] The bending operation unit 80 includes: a rotating member 81, which is rotatable and supported by a shaft, and has the base ends of the first operation line 41 and the second operation line 42 fixed thereon; a moving mechanism that moves the rotating member 81 in the traction direction of the first operation line 41 and the second operation line 42 and in the opposite direction; and an operation receiving unit (e.g., a knob operation unit 84) that receives the operation of the user (operator) and performs the operation. Furthermore, the power of the operation receiving unit is transmitted to the rotating member 81 via the moving mechanism, thereby moving the rotating member 81 in the aforementioned traction direction and in the opposite direction.

[0306] According to this embodiment, when the user operates the operation receiving unit to move the rotating member 81 in the aforementioned traction direction, it is possible to pull both the first operation line 41 and the second operation line 42, which are respectively fixed to the rotating member 81.

[0307] Therefore, within the range corresponding to the configuration of the operation lines (the first operation line 41 and the second operation line 42 in this embodiment), operability corresponding to various needs can be appropriately realized.

[0308] In this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to... Figure 5 (a) and Figure 5 (b) shows that the front end 11 of the medical device body 10 is bent. At this time, it is possible to achieve a balance between the load pulled by the first operating line 41 and the load pulled by the second operating line 42 on the front end 11 of the medical device body 10, and thus it is possible to suppress the phenomenon that the medical device body 10 rotates around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0309] Therefore, when the front end 11 is bent after the main body 10 of the medical device has passed through a curved blood vessel or other body cavity, it is possible to bend the front end 11 in the desired direction more reliably.

[0310] More specifically, in this embodiment, the middle portion 12 and the base portion 13 in the axial direction of the medical device body 10 ( Figure 6 , Figure 7 The first operating line 41 and the second operating line 42 are separated from each other and extend side by side in the circumferential direction of the medical device body 10.

[0311] At the front end 11 of the medical device body 10 in the axial direction, the first operating line 41 and the second operating line 42 bend and converge toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0312] Here, the convergence of the first operating line 41 and the second operating line 42 means that the tip 41a of the first operating line 41 and the tip 42a of the second operating line 42 are close to each other. Preferably, the tip 41a of the first operating line 41 and the tip 42a of the second operating line 42 are close to each other by a distance less than the wall thickness of the resin tube 20 described later.

[0313] Furthermore, as in this embodiment, the medical device 100 has two operating lines, and when these operating lines converge, the direction in which the front end 11 bends can be made to be the same by the traction of the operating lines.

[0314] In the catheter of Patent Document 1, when the tip is bent after passing through a curved blood vessel or other body cavity, it is easy to bend it inward, but not easy to bend it outward.

[0315] The reason is that if the operating line located on the curved outer ring is pulled to bend the tip of the catheter outward, the catheter will rotate around its axis in the curved blood vessel in the direction that the path of the pulled operating line becomes shorter.

[0316] In contrast, according to this embodiment, as described above, the front end portion 11 can be bent in the desired direction more reliably.

[0317] Medical devices typically include catheters.

[0318] The main body 10 of the medical device has a resin tube 20 with an inner cavity that forms a lumen 21.

[0319] In this embodiment, the resin tube 20 has a layered structure comprising: an inner layer 22 in the shape of a hollow tube, the inner cavity of which is a lumen 21; and an outer layer 23 in the shape of a hollow tube, coaxial with the inner layer 22 and formed on the outer periphery of the inner layer 22. The inner layer 22 and the outer layer 23 are each made of resin material. The inner peripheral surface of the outer layer 23 is bonded to the outer peripheral surface of the inner layer 22.

[0320] The resin material constituting the inner layer 22 and the resin material constituting the outer layer 23 may be different from each other or the same.

[0321] A hydrophilic coating may also be formed on the outer surface of the main body 10 of the medical device as needed.

[0322] The lumen 21 is continuously formed from the front end to the base end of the medical device body 10, and opens at the front end and the base end of the medical device body 10 respectively.

[0323] The main body 10 of the medical device also includes a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20. A first operating line 41 is inserted through the first hollow tube 31, and a second operating line 42 is inserted through the second hollow tube 32.

[0324] Hollow tube 31 and hollow tube 32 are secondary lumen hoses, and the inner lumen of these secondary lumen hoses is the secondary lumen. That is, each operating line (operating line 41, operating line 42) is inserted into the secondary lumen.

[0325] The inner diameters of the first hollow tube 31 and the second hollow tube 32 are smaller than the inner diameter of the lumen 21.

[0326] The first operating line 41 and the second operating line 42 are respectively made of fine wires such as metal or resin.

[0327] Furthermore, in this embodiment, since the first hollow tube 31 and the second hollow tube 32 are arranged to avoid the position that would become the inner ring side when the front end 11 of the medical device body 10 is bent, bending of the front end 11 can be easily performed. In particular, the closer to the base end side of the front end 11, the further away the first hollow tube 31 and the second hollow tube 32 are from the inner ring side, thus making bending easier.

[0328] At the front end 11 of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 are bent toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10. As a result, the first operating line 41 in the first hollow tube 31 and the second operating line 42 in the second hollow tube 32 are bent toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0329] Furthermore, the first hollow tube 31 and the second hollow tube 32 do not intersect each other. Also, the first operating line 41 and the second operating line 42 do not intersect each other.

[0330] Thus, the medical device body 10 is configured to include: a resin tube 20 having a lumen 21; and a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20, with a first operating line 41 and a second operating line 42 respectively inserted through them. At the front end 11 in the axial direction of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0331] Furthermore, in the axial direction of the medical device body 10, the area where the first operating line 41 and the second operating line 42 bend towards the front end in a manner that gradually approaches each other in the circumferential direction of the medical device body 10 is called the bending region 15. The base position 15a of the bending region 15 is the position where the first operating line 41 and the second operating line 42 begin to bend towards each other, and the front position 15b of the bending region 15 is the position where the first operating line 41 and the second operating line 42 end to bend towards each other.

[0332] In this embodiment, the front end position 15b of the curved region 15 is the position of the front end 41a, 42a of the first operation line 41 and the second operation line 42 or a position near it.

[0333] The front end 41a of the first operating line 41 protrudes from the front end 31a of the first hollow tube 31. Similarly, the front end 42a of the second operating line 42 protrudes from the front end 32a of the second hollow tube 32.

[0334] For example, front end 41a is located near front end 31a, and front end 42a is located near front end 32a.

[0335] The medical device body 10 includes, for example, a braided layer 51 embedded in the resin tube 20. Thus, the medical device body 10 is reinforced by the braided layer 51. The braided layer 51 is constructed by braiding multiple threads. The braided layer 51 is, for example, disposed around the inner layer 22.

[0336] In addition, the first hollow tube 31 and the second hollow tube 32 are, for example, arranged on the radially outer side of the medical device body 10 (away from the axis of the medical device body 10) than the braided layer 51.

[0337] The medical device body 10 also includes a winding wire 52 embedded in the resin tube 20. The winding wire 52 is wound radially outward from the medical device body 10, further than the braided layer 51, the first hollow tube 31, and the second hollow tube 32. For example, the winding wire 52 binds the first hollow tube 31 and the second hollow tube 32 to the braided layer 51.

[0338] In the curved region 15, the first hollow tube 31 and the second hollow tube 32 are respectively arranged along the outer periphery of the braided layer 51 (see reference). Figure 3 , Figure 4 ).

[0339] In the curved region 15, the distance between the first hollow tube 31 and the second hollow tube 32 in the circumferential direction of the medical device body 10 gradually decreases towards the front end, and the distance between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 also gradually decreases towards the front end.

[0340] Furthermore, the first hollow tube 31 and the second hollow tube 32 are respectively shaped into a curved shape at a position further forward than the base end position 15a of the curved region 15. At the base end position 15a of the curved region 15, the first hollow tube 31 and the second hollow tube 32 can be fixed to at least one of the braided layer 51 or the inner layer 22, or the front end of the wound wire 52 can be disposed at the base end position 15a of the curved region 15, so that at a position further forward than the base end position 15a, the first hollow tube 31 and the second hollow tube 32 are not bound by the wound wire 52.

[0341] In the middle part 12 and the base end 13 along the axial direction of the medical device body 10, the first operating line 41 and the second operating line 42 are positioned opposite each other in the circumferential direction of the medical device body 10.

[0342] In this embodiment, for example, Figure 2 As shown, at the middle portion 12 of the medical device body 10, the first operating line 41 and the second operating line 42 are positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10, with the axis center of the medical device body 10 as a reference. Similarly, at the base end 13 of the medical device body 10 and the base end position 15a of the curved region 15, the first operating line 41 and the second operating line 42 are also positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10. That is, at the middle portion 12, the base end 13, and the base end position 15a of the curved region 15, the phase difference between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 is 180 degrees.

[0343] The phase difference between the first operating line 41 and the second operating line 42 in the circumferential direction of the medical device body 10 gradually decreases towards the front end in the curved region 15, and at the front end position 15b of the curved region 15, for example, the phase difference becomes almost zero. In this embodiment, the first operating line 41 and the second operating line 42 are each rotated 90 degrees in the circumferential direction of the medical device body 10 in the curved region 15.

[0344] However, the arrangement of the first operating line 41 and the second operating line 42 in a position opposite each other in the circumferential direction of the medical device body 10 is not limited to this example, but means that the first operating line 41 and the second operating line 42 are separated from each other by more than 120 degrees in the circumferential direction of the medical device body 10.

[0345] Furthermore, in this embodiment, at the middle portion 12, the base end portion 13, and the base end position 15a of the curved region 15 of the medical device body 10, the first hollow tube 31 and the second hollow tube 32 are positioned 180 degrees apart from each other in the circumferential direction of the medical device body 10, with the axial center of the medical device body 10 as a reference. That is, at the middle portion 12, the base end portion 13, and the base end position 15a of the curved region 15, the phase difference between the first hollow tube 31 and the second hollow tube 32 in the circumferential direction of the medical device body 10 is 180 degrees. This phase difference gradually decreases towards the front end side in the curved region 15.

[0346] The front end 11 of the medical device body 10 is provided with a ring-shaped marker 70 made of a non-radiotransmittable metallic material.

[0347] The marker 70 is coaxial with the lumen 21 and is positioned around the lumen 21.

[0348] Markers 70 are, for example, disposed around the braided layer 51.

[0349] The front end 41a of the first operating line 41 is fixed to the marker 70, for example, by a dotted solder, i.e., the first fixing part 71.

[0350] Similarly, the front end 42a of the second operating line 42 is fixed to the marker 70, for example, by a dotted solder, i.e., the first fixing part 71.

[0351] The first fixing part 71 and the second fixing part 72 are disposed, for example, at the end of the base side of the marker 70.

[0352] In this embodiment, the front end 41a of the first operation line 41 and the front end 42a of the second operation line 42 are connected to each other. That is, the front ends of the first operation line 41 and the second operation line 42 are connected to each other.

[0353] More specifically, the first fixing part 71 and the second fixing part 72 are adjacent to each other and in contact. That is, the first fixing part 71 and the second fixing part 72 are integrated.

[0354] In addition, the front end 41a and the front end 42a can also be fixed to the marker 70 by a fixing part.

[0355] Next, use Figure 6 and Figure 7 The hub 90 located at the base end of the medical device body 10 will be described.

[0356] The hub 90 has a connecting portion 93 for inserting an injector (not shown) from the base end of the hub 90. The outer periphery of the connecting portion 93 is formed with a threaded groove so that the injector can be fixed in a detachable manner.

[0357] The outer periphery of the hub 90 has two blade portions 92 that are opposite each other across the axis of the hub 90.

[0358] The front end of the hub 90 is inserted into and fixed to the base end of the medical device body 10. Thus, the cavity 21 inside the medical device body 10 is connected to the internal space of the hub 90.

[0359] By rotating the blade section 92 around the axis of the hub 90, torque operation can be performed to rotate the entire medical device body 10.

[0360] The front end of the hub 90 is connected to the frame 86 of the bending operation part 80, which will be described later.

[0361] Next, use Figure 6 and Figure 7 The bending operation part 80 of the medical device 100 will be described.

[0362] The medical device 100 includes a bending operation section 80, which is used to bend the front end 11 of the medical device body 10 by traction of the first operation line 41 and the second operation line 42.

[0363] The bending operation unit 80 is configured to include: a rotating member 81, which is supported by a shaft to be rotatable and engages with the first operation line 41 and the second operation line 42, and the base end of the first operation line 41 and the base end of the second operation line 42 are fixed thereon; and a moving mechanism that moves the rotating member 81 in the traction direction of the first operation line 41 and the second operation line 42 and in the opposite direction to the traction direction.

[0364] Rotating component 81 is, for example, a pulley.

[0365] In this specification, the ability of a component to rotate is not limited to rotating more than 360 degrees, but also includes the ability to swing within a specified angular range of less than 360 degrees.

[0366] like Figure 6 As shown, the rotating component 81 has a locking portion formed in a circular shape centered on the rotation center of the rotating component 81, in which the first operating line 41 and the second operating line 42 are engaged. Furthermore, the locking portion of the rotating component 81 is not limited to a circular shape, but may also be an arc shape.

[0367] Thus, the rotating component 81 has a engaging portion engaged by the first operating line 41 and the second operating line, and the engaging portion is formed in a circular shape or an arc shape centered on the rotation center of the rotating component 81.

[0368] The moving mechanism is configured to include a forward / reverse component 82 and a pinion 83.

[0369] The forward / backward component 82 includes: a holding portion 82a that holds the rotating component 81 so that it can rotate; and a rod-shaped portion 82b that extends from the holding portion 82a toward the base end of the medical device body 10.

[0370] The rod-shaped portion 82b is formed with a toothed portion 82c.

[0371] The bending operation unit 80 also includes: a frame 86, which is the main body of the bending operation unit 80; a knob operation unit 84, which is rotatably supported on the frame 86; a pinion 83, which is integrally formed with the knob operation unit 84; and a guide member 85, which is provided on the inner surface of the frame 86 and guides the rod-shaped portion 82b in the direction of the long side of the rod-shaped portion 82b (for example, a pair of front and rear guide members 85).

[0372] The base end 13 of the medical device body 10 passes through the interior of the frame 86 and is guided to the base end side of the frame 86, and is inserted and fixed to the front end of the hub 90.

[0373] The rotation axis of the knob operation part 84 extends orthogonally to the axis of the medical device body 10 within the frame 86.

[0374] The pinion 83 is integrally formed with the knob operation part 84 on one side and is coaxially configured with the rotation axis of the knob operation part 84.

[0375] The gear on the outer periphery of the pinion 83 meshes with the gear on the rack portion 82c of the forward / reverse component 82.

[0376] At least a portion of the knob operating part 84 is exposed outside the housing 86 so that an operator performing the operation of the medical device 100 can rotate the knob operating part 84 from outside the housing 86.

[0377] The entire rotating component 81 is housed within the frame 86. That is, the bending operation unit 80 has a frame 86, and the entire rotating component 81 is housed within the frame 86.

[0378] The first operating line 41 and the second operating line 42 are respectively led out from the main body 10 of the medical device within the frame 86.

[0379] The base end of the first operating line 41 is wound around the rotating member 81 one and a half turns, and the base end of the first operating line 41 passes through the first fixing part 81a ( Figure 6 It is fixed to the rotating component 81.

[0380] Similarly, the second operating line 42 is wound around the rotating component 81 one and a half turns, and the base end of the second operating line 42 passes through the second fixing part 81b ( Figure 6 It is fixed to the rotating component 81.

[0381] The winding directions of the first operating line 41 and the second operating line 42 of the rotating component 81 are opposite to each other, so the rotation angle of the rotating component 81 is automatically adjusted to an angle in which the tension of the first operating line 41 and the tension of the second operating line 42 are balanced.

[0382] The operator who operates the medical device 100 holds the frame 86 or the hub 90 to rotate the knob operating part 84. As a result, the pinion 83, which is integrated with the knob operating part 84, rotates on its axis. At the same time, the forward and backward part 82, which has a rack part 82c, moves forward (towards the front end of the medical device body 10) or backward (towards the base end of the medical device body 10) relative to the frame 86 in the axial direction of the medical device body 10.

[0383] Figure 6 In the process, by rotating the knob operation part 84 clockwise, the forward and backward part 82 and the rotating part 81 retract, and both the first operation line 41 and the second operation line 42 are pulled toward the base end of the medical device body 10.

[0384] Thus, the operation receiving unit (knob operation unit 84) is supported by a shaft so that it can be rotated. The moving mechanism includes: a pinion 83, which is integrally and coaxially disposed with the operation receiving unit; and a rack member (forward and backward member 82), which moves forward and backward in conjunction with the rotation of the pinion 83. The rotating member 81 is supported by a shaft on the rack member.

[0385] Thus, by operating the bending operation section 80, the first operation line 41 and the second operation line 42 are pulled together.

[0386] Here, "the first operating line 41 and the second operating line 42 being pulled together" means that there is a moment when the first operating line 41 and the second operating line 42 are pulled together, and is not limited to the first operating line 41 and the second operating line 42 starting to be pulled at the same time, nor is it limited to the first operating line 41 and the second operating line 42 ending to be pulled at the same time.

[0387] For example, Figure 8 As shown in (a), when the front end 11 of the medical device body 10 is in a straight line shape, Figure 8 (b) If the knob operation part 84 is rotated clockwise, the first operation line 41 and the second operation line 42 are pulled towards the base end of the medical device body 10, so the front end 11 of the medical device body 10 bends in one direction.

[0388] Additionally, if the knob operation section 84 is moved from... Figure 8(b) When the state is rotated counterclockwise, the forward and backward component 82 and the rotating component 81 move forward, and the tension of the first operating line 41 and the second operating line 42 is relaxed, thus allowing the front end 11 of the medical device body 10 to return to a straight shape.

[0389] Thus, in this embodiment, the bending operation unit 80 is configured as follows: through a conversion mechanism consisting of a pinion 83 and a rack (rack part 82c), the operation performed by the user is received by the rotation mechanism (knob operation unit 84), and the force applied to the rotation mechanism is converted into axial forward and backward movement of the medical device body 10 by the operation.

[0390] Next, examples of materials used in each part of the medical device 100 will be explained.

[0391] As the material for the inner layer 22, resin materials such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroalkoxy fluoropolymer (PFA) can be used.

[0392] In addition to polyimide (PI), polyamide-imide (PAI), and polyethylene terephthalate (PET), other resin materials such as polyethylene (PE), polyamide (PA), nylon elastomer, polyurethane (PU), ethylene / vinyl acetate resin (EVA), polyvinyl chloride (PVC), or polypropylene (PP) can be used as the material for the outer layer 23.

[0393] For example, resin materials such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroalkoxy fluoropolymer (PFA) can be used as materials for the first hollow tube 31 and the second hollow tube 32.

[0394] The material of the wires constituting the braided layer 51 is preferably a metal such as stainless steel or tungsten, but it may also be a resin material.

[0395] The material of the wire constituting the winding wire 52 is preferably a metal material such as stainless steel or tungsten, but it may also be a resin material.

[0396] According to the medical device 100 of the second-first embodiment described above, the front end 11 of the medical device body 10 can be bent by pulling both the first operating line 41 and the second operating line 42. At this time, a balance can be achieved between the load pulled by the first operating line 41 and the load pulled by the second operating line 42 on the front end 11 of the medical device body 10. Therefore, the phenomenon of the medical device body 10 rotating around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut can be suppressed.

[0397] This allows the front end 11 of the medical device body 10 to bend more reliably in the desired direction.

[0398] [Implementation Method 2-2]

[0399] Next, use Figures 9 to 11 (b) The medical device 100 according to the second-2nd embodiment will be described.

[0400] Figure 11 (a) and Figure 11 (b) is used to explain from Figure 10 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 11 (a) indicates the state before bending. Figure 11 (b) indicates a bent state.

[0401] The medical device 100 described in this embodiment differs from the medical device 100 described in the second-first embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the second-first embodiment.

[0402] In this embodiment, a parallel region 16 is formed between the front end (front end position 15b) of the curved region 15 and the front ends 41a and 42a of the first operation line 41 and the second operation line 42, where the first operation line 41 and the second operation line 42 are close to each other and extend side by side.

[0403] That is, the medical device body 10 is configured to include a resin tube 20 having a lumen 21. A first operating line 41 and a second operating line 42 are inserted around the lumen 21 of the resin tube 20. At the front end (front end position 15b) of a curved region 15 in which the first operating line 41 and the second operating line 42 bend toward the front end side and gradually approach each other in the circumferential direction of the medical device body 10, the first operating line 41 and the second operating line 42 approach each other at a distance less than the wall thickness of the resin tube 20. Between the front end (front end position 15b) of the curved region 15 and the front ends 41a and 42a of the first operating line 41 and the second operating line 42, a parallel region 16 is formed in which the first operating line 41 and the second operating line 42 approach each other and extend side by side.

[0404] In the parallel region 16, the first hollow tube 31 and the second hollow tube 32 abut against or approach each other and extend side by side.

[0405] More specifically, in this embodiment, the medical device 100 also includes an annular component 60 embedded in the resin tube 20 at the front end of the curved region 15.

[0406] The annular component 60 is configured to have higher rigidity than the resin tube 20, and its outer diameter is smaller than the wall thickness of the resin tube 20 (see reference). Figure 10 ).

[0407] Furthermore, the first operating line 41 and the second operating line 42 are inserted through the annular component 60.

[0408] Therefore, it is possible to more reliably suppress changes in the paths of the first operating line 41 and the second operating line 42.

[0409] More specifically, in this embodiment, the first hollow tube 31 and the second hollow tube 32 are inserted through the annular component 60.

[0410] That is, the main body 10 of the medical device is configured to include a first hollow tube 31 and a second hollow tube 32 embedded in the resin tube 20 and respectively inserted through the first operating line 41 and the second operating line 42, and the first hollow tube 31 and the second hollow tube 32 inserted in the annular component 60. In the bending region 15, the first hollow tube 31 and the second hollow tube 32 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the main body 10 of the medical device.

[0411] The material of the annular component 60 is not particularly limited, but the annular component 60 can be made of, for example, metal or hard resin.

[0412] In this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to achieve the following: Figure 11 (a) and Figure 11 As shown in (b), the front end 11 of the medical device body 10 is bent.

[0413] At this point, the bending angle in the parallel region 16 becomes steeper compared to the bending angle in the bending region 15.

[0414] As an example, along the axial direction of the medical device body 10, the distance from the base end (base end position 15a) to the front end (front end position 15b) of the curved region 15 ( Figure 9 Compared to the distance L1 shown, the distance from the front end of the curved region 15 (front end position 15b) to the front ends 41a and 42a of the first operating line 41 and the second operating line 42 is ( Figure 9 The distance shown (L2) is longer.

[0415] Based on these structures, the front end 11 can be bent more easily.

[0416] Furthermore, the bending of the front end portion 11 can be mainly generated in the parallel region 16. Therefore, regardless of the bending angle of the front end portion 11, the friction between the first operating line 41 and the first hollow tube 31, and the friction between the second operating line 42 and the second hollow tube 32 in the bending region 15 can be kept substantially constant. Thus, regardless of the bending angle of the front end portion 11, the magnitude of the force required to pull the first operating line 41 and the second operating line 42 can be kept substantially constant.

[0417] Furthermore, as another example, the distance from the base end (base end position 15a) to the front end (front end position 15b) of the curved region 15 along the axial direction of the medical device body 10 is... Figure 9 The distance L1 shown is greater than the distance from the front end of the curved region 15 (front end position 15b) to the front ends 41a and 42a of the first operating line 41 and the second operating line 42. Figure 9 The distance shown (L2) is longer.

[0418] Based on these structures, the bending of the front end 11 can be suppressed to a certain extent.

[0419] Furthermore, it can mitigate the bending of the first operating line 41 and the second operating line 42, and the first hollow tube 31 and the second hollow tube 32 in the bending region 15, thereby reducing the friction between the first operating line 41 and the first hollow tube 31, and the friction between the second operating line 42 and the second hollow tube 32 in the bending region 15.

[0420] Furthermore, the length region in which the first hollow tube 31 and the second hollow tube 32 are close to each other and run parallel in the front end 11 of the medical device body 10, i.e., the length region with high rigidity, is shortened. Therefore, good selectivity (good vascular selectivity, etc.) is obtained when the front end 11 of the medical device body 10 is bent to enter the branch cavity.

[0421] Alternatively, distances L1 and L2 can be the same. In this case, a good balance can be achieved in the smoothness of traction of the first operating line 41 and the second operating line 42, as well as good selectivity when the front end 11 of the medical device body 10 bends and enters the branch cavity.

[0422] [Second and Third Embodiments]

[0423] Next, use Figures 12 to 18 (c) The medical device 100 according to the second and third embodiments will be described.

[0424] Figure 16 (a) and Figure 16 (b) is used to explain from Figure 15 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow A. Figure 16 (a) indicates the state before bending. Figure 16 (b) indicates a bent state.

[0425] Figure 16 (c) and Figure 16 (d) is used to explain from Figure 15 The diagram shows the bending motion of the front end 11 of the main body 10 of the medical device when viewed in the direction of arrow B. Figure 16 (c) indicates the state before bending. Figure 16 (d) indicates a bent state.

[0426] Figure 18 (a) Figure 18 (b) and Figure 18 In (c), the middle portion of the main body 10 of the medical device is broken off and omitted along its long side. Figure 18 (a) Figure 8 (b) and Figure 18 In the medical device body 10 shown in (c), the rotational phases around the axis of the medical device body 10 differ by 90 degrees in the portion closer to the base end and the portion closer to the front end than the omitted portion.

[0427] The medical device 100 described in this embodiment differs from the medical device 100 described in the second-second embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the second-second embodiment.

[0428] The medical device 100 according to this embodiment includes a third operating line 43 and a fourth operating line 44 respectively inserted along the axial direction of the medical device body 10. The third operating line 43 and the fourth operating line 44 are made of fine wires such as metal or resin, just like the first operating line 41 and the second operating line 42.

[0429] The main body 10 of the medical device also includes a third hollow tube 33 and a fourth hollow tube 34 embedded in the resin tube 20. A third operating line 43 is inserted through the third hollow tube 33, and a fourth operating line 44 is inserted through the fourth hollow tube 34.

[0430] The third hollow tube 33 and the fourth hollow tube 34 are the same secondary lumen hoses as the first hollow tube 31 and the second hollow tube 32. The inner lumen of these secondary lumen hoses is a secondary lumen. That is, each operating line (the third operating line 43 and the fourth operating line 44) is inserted into the secondary lumen.

[0431] The inner diameters of the third hollow tube 33 and the fourth hollow tube 34 are smaller than the inner diameter of the lumen 21.

[0432] In this embodiment, at the middle portion 12 of the medical device body 10, the first hollow tube 31 and the third hollow tube 33 are close to or abut against each other and extend side by side, and the second hollow tube 32 and the fourth hollow tube 34 are close to or abut against each other and extend side by side (see reference). Figure 13 ).

[0433] Similarly, at the base end of the medical device body 10, the first hollow tube 31 and the third hollow tube 33 are close to or abut against each other and extend side by side, and the second hollow tube 32 and the fourth hollow tube 34 are close to or abut against each other and extend side by side.

[0434] In the curved region 15 of the front end 11 of the medical device body 10, the third hollow tube 33 and the fourth hollow tube 34 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10. As a result, the third operating line 43 in the third hollow tube 33 and the fourth operating line 44 in the fourth hollow tube 34 bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body 10.

[0435] In the curved region 15, the direction of the bending of the third hollow tube 33 and the third operating line 43 is symmetrical to the direction of the bending of the first hollow tube 31 and the first operating line 41.

[0436] Similarly, in the curved region 15, the direction of curvature of the fourth hollow tube 34 and the fourth operating line 44 is symmetrical to the direction of curvature of the second hollow tube 32 and the second operating line 42.

[0437] Furthermore, none of the hollow tubes (first hollow tube 31, second hollow tube 32, third hollow tube 33 and fourth hollow tube 34) intersect with other hollow tubes. Also, none of the operating lines (first operating line 41, second operating line 42, third operating line 43 and fourth operating line 44) intersect with other operating lines.

[0438] In parallel region 16, similarly to the first operating line 41 and the second operating line 42, which are close to each other and extend side by side, the third operating line 43 and the fourth operating line 44 are close to each other and extend side by side.

[0439] Furthermore, in the parallel region 16, similarly to the first hollow tube 31 and the second hollow tube 32, which abut against or approach each other and extend side by side, the third hollow tube 33 and the fourth hollow tube 34 abut against or approach each other and extend side by side.

[0440] The tip 43a of the third operating line 43 protrudes from the tip of the third hollow tube 33. Similarly, the tip 44a of the fourth operating line 44 protrudes from the tip of the fourth hollow tube 34.

[0441] The front end 43a of the third operating line 43 is fixed to the marker 70, for example, by a dotted solder, i.e., the third fixing part 73. Figure 15 ).

[0442] Similarly, the front end 44a of the fourth operating line 44 is fixed to the marker 70, for example, by a dotted solder, i.e., the fourth fixing part 74.

[0443] The third fixing part 73 and the fourth fixing part 74 are disposed, for example, at the end of the base side of the marker 70.

[0444] The regions where the third fixing part 73 and the fourth fixing part 74 are arranged and the regions where the first fixing part 71 and the second fixing part 72 are arranged are opposite each other in the circumferential direction of the medical device body 10.

[0445] In this embodiment, the front end 43a of the third operation line 43 and the front end 44a of the fourth operation line 44 are connected to each other. That is, the front ends of the third operation line 43 and the fourth operation line 44 are connected to each other.

[0446] More specifically, the third fixing part 73 and the fourth fixing part 74 are adjacent to each other and in contact. That is, the third fixing part 73 and the fourth fixing part 74 are integrated.

[0447] In addition, the front end 43a and the front end 44a can also be fixed to the marker 70 by a fixing part.

[0448] like Figure 14 As shown, in this embodiment, the medical device 100 has a first annular member 61 embedded in the resin tube 20 at the front end of the curved region 15, instead of the annular member 60. The first annular member 61 is the same as the annular member 60 in the second-second embodiment, and a first hollow tube 31 and a second hollow tube 32 are inserted through the first annular member 61.

[0449] Furthermore, in this embodiment, the medical device 100 includes a second annular member 62 embedded in the resin tube 20 at the front end of the curved region 15. The second annular member 62 is the same as the first annular member 61. A third hollow tube 33 and a fourth hollow tube 34 are inserted through the second annular member 62.

[0450] The first annular component 61 and the second annular component 62 are arranged opposite each other in the circumferential direction of the medical device body 10.

[0451] In this embodiment, by pulling both the first operating line 41 and the second operating line 42, it is possible to achieve the following: Figure 16 (a) and Figure 16 As shown in (b), the front end 11 of the medical device body 10 is bent in one direction.

[0452] Furthermore, in this embodiment, by pulling both the third operating line 43 and the fourth operating line 44, it is possible to achieve the following: Figure 16 (c) and Figure 16 As shown in (d), the front end 11 of the medical device body 10 is bent in a direction opposite to the aforementioned direction.

[0453] like Figure 17 and Figure 18As shown in (a), in this embodiment, the bending operation unit 80 includes: a first bending operation unit 180 for bending the front end portion 11 of the medical device body 10 by traction of the first operation line 41 and the second operation line 42; and a second bending operation unit 280 for bending the front end portion 11 of the medical device body 10 by traction of the third operation line 43 and the fourth operation line 44.

[0454] The first bending operation unit 180 includes a first rotating component 181, a first forward / reverse component 182, a first pinion 183, a first knob operation unit 184, and a first guide member 185. The first rotating component 181, the first forward / reverse component 182, the first pinion 183, the first knob operation unit 184, and the first guide member 185 respectively correspond to the rotating component 81, the forward / reverse component 82, the pinion 83, the knob operation unit 84, and the guide member 85 described in the second-1 embodiment.

[0455] Therefore, the first forward / backward component 182 has a first holding portion 182a, a first rod-shaped portion 182b, and a first rack portion 182c, which respectively correspond to the holding portion 82a, the rod-shaped portion 82b, and the rack portion 82c.

[0456] In the second-1 embodiment, the first operating line 41 and the second operating line 42 are wound and fixed on the first rotating member 81 in the same manner as the first operating line 41 and the second operating line 42 are wound and fixed on the rotating member 81.

[0457] The second bending operation unit 280 includes a second rotating member 281, a second forward / reverse member 282, a second pinion 283, a second knob operation unit 284, and a second guide member 285. The second rotating member 281, the second forward / reverse member 282, the second pinion 283, the second knob operation unit 284, and the second guide member 285 are the same as the first rotating member 181, the first forward / reverse member 182, the first pinion 183, the first knob operation unit 184, and the first guide member 185.

[0458] The second forward / backward component 282 has a second retaining portion 282a, a second rod-shaped portion 282b, and a second rack portion 282c that are identical to the first retaining portion 182a, the first rod-shaped portion 182b, and the first rack portion 182c.

[0459] Similarly, the third operating line 43 and the fourth operating line 44 are wound and fixed on the first rotating component 181, just as the first operating line 41 and the second operating line 42 are wound and fixed on the second rotating component 281.

[0460] For example, the second bending operation unit 280 in Figure 17 The middle part is configured to be symmetrical about the top and bottom relative to the first bending operation part 180.

[0461] In this embodiment, rotating the first knob operating part 184 causes the first forward / backward member 182 and the first rotating member 181 to retract, thereby pulling the first operating line 41 and the second operating line 42, causing the front end 11 of the medical device body 10 to bend in one direction. Figure 18 (b)).

[0462] Furthermore, rotating the second knob operating part 284 causes the second forward / backward component 282 and the second rotating component 281 to retract, thereby pulling the third operating line 43 and the fourth operating line 44, causing the front end 11 of the medical device body 10 to bend in the opposite direction to the aforementioned direction. Figure 18 (c)).

[0463] Thus, in this embodiment, the medical device 100 includes a second bending operation section 280, which is used to bend the front end 11 of the medical device body 10 in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the traction of the third operation line 43 and the fourth operation line 44.

[0464] At the middle portion 12 and the base end of the medical device body 10 in the axial direction, the third operating line 43 and the fourth operating line 44 are separated from each other and extend side by side in the circumferential direction of the medical device body 10. At the front end 11 in the axial direction of the medical device body 10, the third operating line 43 and the fourth operating line 44 bend towards the front end side and gradually approach each other in the circumferential direction of the medical device body 10 and then merge.

[0465] Furthermore, by operating the second bending operation unit 280, the third operation line 43 and the fourth operation line 44 are pulled together.

[0466] The second bending operation unit 280 includes: a second rotating member 281, which is rotatable by a shaft and has the base ends of the third operation line 43 and the fourth operation line 44 fixed thereon; a second moving mechanism that moves the second rotating member 281 in a second traction direction and in a direction opposite to the second traction direction for traction of the third operation line 43 and the fourth operation line 44; and a second operation receiving unit (second knob operation unit 284) that receives user operations and performs the operation. Furthermore, the power of the second operation receiving unit is transmitted to the second rotating member 281 via the second moving mechanism, thereby causing the second rotating member 281 to move in the second traction direction and in a direction opposite to the second traction direction.

[0467] In addition, in this embodiment, the second traction direction is the same as the traction direction described above.

[0468] More specifically, the second rotating component 281 engages with the third operating line 43 and the fourth operating line 44, and the base end of the third operating line 43 and the base end of the fourth operating line 44 are fixed thereon.

[0469] As described above, the bending operation unit 80 includes a frame 86. Furthermore, the entire rotating member (first rotating member 181) and the entire rotating member 281 are housed within the frame 86.

[0470] The second rotating member 281 has a second engaging portion engaged by the third operating line 43 and the fourth operating line 44. The second engaging portion is formed in a circular shape or an arc shape centered on the rotation center of the second rotating member 281.

[0471] The second operation receiving unit (second knob operation unit 284) is supported by a shaft and is capable of rotational operation. The second moving mechanism includes: a second pinion 283, which is integrally and coaxially disposed with the second operation receiving unit; and a second rack member (second forward / backward member 282), which moves forward and backward in conjunction with the rotation of the second pinion 283. The second rotating member 281 is supported by a shaft on the second rack member.

[0472] [Implementation Methods 2-4]

[0473] Next, use Figure 19 (a) and Figure 19 (b) The medical device 100 according to embodiments 2-4 will be described.

[0474] The medical device 100 described in this embodiment differs from the medical device 100 described in the second-first embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the second-first embodiment.

[0475] In this embodiment, a flexible portion 110 with high local flexibility is formed in the circumferential direction of the front end portion 11 of the medical device body 10, in the region between the first operation line 41 and the second operation line 42, or in the region on the opposite side of the region separated from the axis of the medical device body 10.

[0476] As a result, the flexibility of the front end 11 is improved, thereby reducing the tension acting on the first operating line 41 and the second operating line 42 during bending operations. As a result, it is possible to further suppress the phenomenon of the medical device body 10 rotating around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0477] More specifically, such as Figure 19As shown in (b), a bendable portion 110 is formed in two regions on the circumferential direction of the front end portion 11 of the medical device body 10: the region between the first operating line 41 and the second operating line 42, and the region on the opposite side of the region, which is separated from the axis of the medical device body 10.

[0478] As a result, the flexibility of the front end 11 is further improved.

[0479] The bendable portion 110 is configured to include a notch-shaped portion 111 formed on the outer surface of the medical device body 10.

[0480] For example, the notch shape 111 Figure 19 (b) shows a shape that can be set to be concave and arc-shaped.

[0481] This allows the front end 11 to bend more steeply.

[0482] [Implementation Methods 2-5]

[0483] Next, use Figure 20 (a) and Figure 20 (b) The medical device 100 according to embodiments 2-5 will be described.

[0484] The medical device 100 described in this embodiment differs from the medical device 100 described in the second-first embodiment in the aspects described below, but is otherwise configured to be the same as the medical device 100 described in the second-first embodiment.

[0485] In this embodiment, a flexible portion 110 with high local flexibility is formed in the circumferential direction of the front end portion 11 of the medical device body 10, in the region between the first operation line 41 and the second operation line 42, or in the region on the opposite side of the region separated from the axis of the medical device body 10.

[0486] As a result, the flexibility of the front end 11 is improved, thereby reducing the tension acting on the first operating line 41 and the second operating line 42 during bending operations. As a result, it is possible to further suppress the phenomenon of the medical device body 10 rotating around the axis due to the first operating line 41 or the second operating line 42 attempting to take a shortcut.

[0487] More specifically, such as Figure 20 As shown in (b), a bendable portion 110 is formed in the circumferential direction of the front end 11 of the medical device body 10 in the region between the first operating line 41 and the second operating line 42, while no bendable portion 110 is formed in the region on the opposite side of the region where the axis of the medical device body 10 is located.

[0488] However, the flexible portion 110 may also be formed in two areas on the circumferential direction of the front end portion 11 of the medical device body 10: the area between the first operating line 41 and the second operating line 42, and the area on the opposite side of the area separated by the axis of the medical device body 10.

[0489] The bendable portion 110 is configured to include a notch-shaped portion 111 formed on the outer surface of the medical device body 10.

[0490] In this embodiment, the medical device body 10 has a plurality of notch-shaped portions 111 arranged adjacent to each other in the axial direction of the medical device body 10. These notch-shaped portions 111 are elongated in the circumferential direction of the medical device body 10 and have a wedge-shaped cross-section.

[0491] In this embodiment, the front end 11 of the medical device body 10 is easy to bend in the initial stage of bending, but if a certain degree of bending angle is reached, the wedge-shaped inclined surfaces come into contact with each other, making it difficult to bend further (if a certain degree of bending angle is reached, the rigidity becomes higher).

[0492] Therefore, the front end 11 of the medical device body 10 has good resistance to deformation under axial compression when pushed into the body cavity, thus the medical device 100 has good vascular selectivity.

[0493] [Implementation Methods 2-6]

[0494] Next, use Figure 21 The second to sixth embodiments will be described.

[0495] The medical device 100 described in this embodiment differs from the medical device 100 described in the second and third embodiments described above in the following aspects, but is otherwise configured to be the same as the medical device 100 described in the second and third embodiments described above.

[0496] In this embodiment, as will be explained below, the structure of the bending operation section 80 is different from that in the second and third embodiments described above.

[0497] In this embodiment, the bending operation unit 80 includes a frame 86, a first rotating member 181 (rotating member), a second rotating member 281, a knob operation unit 194 (third rotating member), a first connecting line 192 connecting the first rotating member 181 and the knob operation unit 194 to each other, and a second connecting line 193 connecting the second rotating member 281 and the knob operation unit 194 to each other.

[0498] The first rotating component 181 and the second rotating component 281 are, for example, pulleys.

[0499] The rotation axis of the first rotating component 181 is, for example, in the direction relative to the axis of the medical device body 10 within the frame 86. Figure 21 Extend in a direction that is orthogonal to the left and right directions in the middle.

[0500] The rotation axis of the first rotating component 181 is held by the frame 86 so that it can rotate about the axis and is in the axial direction of the medical device body 10 within the frame 86. Figure 21 It can move relative to the frame 86 in the left-right direction. For example, the rotation axis of the first rotating member 181 is supported by an elongated hole (not shown) formed in the frame 86.

[0501] Similarly, the rotation axis of the second rotating component 281 extends, for example, in a direction orthogonal to the axial direction of the medical device body 10 within the frame 86. The rotation axis of the second rotating component 281 is held by the frame 86 so that it can rotate about the axis of rotation and can move relative to the frame 86 in the axial direction of the medical device body 10 within the frame 86.

[0502] As an example, the rotation axis of the first rotating component 181 and the rotation axis of the second rotating component 281 are parallel to each other. However, these rotation axes may not be parallel to each other.

[0503] The first operating line 41, the second operating line 42, the third operating line 43 and the fourth operating line 44 are respectively led out from the main body 10 of the medical device within the frame 86.

[0504] The base end of the first operating line 41 is wound around the first rotating member 181 for example, one and a half turns, and the base end of the first operating line 41 is fixed to the first rotating member 181. Similarly, the second operating line 42 is wound around the first rotating member 181 for example, one and a half turns, and the base end of the second operating line 42 is fixed to the first rotating member 181. The winding directions of the first operating line 41 and the second operating line 42 relative to the first rotating member 181 are opposite to each other. Therefore, the rotation angle of the first rotating member 181 is automatically adjusted to an angle that balances the tension of the first operating line 41 and the tension of the second operating line 42.

[0505] The base end of the third operating line 43 is wound around the second rotating member 281 for example, one and a half turns, and the base end of the third operating line 43 is fixed to the second rotating member 281. Similarly, the fourth operating line 44 is wound around the second rotating member 281 for example, one and a half turns, and the base end of the fourth operating line 44 is fixed to the second rotating member 281. The winding directions of the third operating line 43 and the fourth operating line 44 relative to the second rotating member 281 are opposite to each other. Therefore, the rotation angle of the second rotating member 281 is automatically adjusted to an angle that balances the tension of the third operating line 43 and the tension of the fourth operating line 44.

[0506] The knob operating part 194 is supported by an axis so that it can rotate relative to the frame 86. The rotation axis of the knob operating part 194 extends in a direction orthogonal to the axis of the medical device body 10 within the frame 86.

[0507] As an example, the rotation axis of the knob operation section 194 is parallel to the rotation axis of the first rotating member 181 and the rotation axis of the second rotating member 281. However, the rotation axis of the knob operation section 194 may also be non-parallel to the rotation axis of the first rotating member 181 and the rotation axis of the second rotating member 281.

[0508] At least a portion of the knob operating part 194 is exposed outside the housing 86 so that an operator performing the operation of the medical device 100 can rotate the knob operating part 194 from outside the housing 86.

[0509] The knob operation section 194 includes, for example, a main body formed in the shape of a disc and a winding section 191 fixed to one side of the main body.

[0510] The winding section 191 is, for example, a cylindrical spool. The winding section 191 is coaxially arranged with the rotation axis of the knob operation section 194.

[0511] The front end of the first connecting wire 192 is connected to the rotation axis of the first rotating component 181. The base end of the first connecting wire 192 is wound around the winding portion 191 one and a half turns, and the base end of the first connecting wire 192 is fixed to the winding portion 191 at the first connecting portion 195.

[0512] Similarly, the front end of the second connecting line 193 is connected to the rotation axis of the second rotating component 281. The base end of the second connecting line 193 is wound around the winding portion 191 one and a half turns, and the base end of the second connecting line 193 is fixed to the winding portion 191 at the second connecting portion 196.

[0513] The winding direction of the first connecting line 192 relative to the winding section 191 and the winding direction of the second connecting line 193 are opposite to each other.

[0514] In this embodiment, the operator operating the medical device 100 holds the frame 86 or the hub 90 to rotate the knob operation part 194, thereby selectively winding the first connecting wire 192 or the second connecting wire 193 around the winding part 191, and thus selectively pulling the first rotating member 181 or the second rotating member 281 toward the base end side.

[0515] That is, the knob operating part 194 was made to... Figure 21During the clockwise rotation operation, the first connecting line 192 is wound around the winding part 191, thus the first rotating member 181 is pulled towards the base end. As a result, both the first operating line 41 and the second operating line 42 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in one direction.

[0516] Furthermore, the knob operating section 194 was made to... Figure 21 During the counterclockwise rotation operation, the second connecting line 193 is wound around the winding part 191, thus the second rotating member 281 is pulled towards the base end. As a result, both the third operating line 43 and the fourth operating line 44 are pulled towards the base end of the medical device body 10, thus the front end 11 of the medical device body 10 bends in the opposite direction to the aforementioned direction.

[0517] That is, by operating a knob operation unit 194, it is possible to operate both the first operation line 41 and the second operation line 42, and to operate both the third operation line 43 and the fourth operation line 44.

[0518] Thus, the medical device 100 according to this embodiment has a third operating line 43 and a fourth operating line 44 respectively inserted along the axial direction of the medical device body 10. By operating the bending operating part 80 to pull the third operating line 43 and the fourth operating line 44, the front end 11 of the medical device body 10 can be bent in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the pull of the first operating line 41 and the second operating line 42.

[0519] More specifically, in addition to the rotating member (first rotating member 181), the bending operation unit 80 also includes a second rotating member 281 and a third rotating member (knob operation unit 194) that are rotatably supported by shafts. The rotation shaft of the rotating member is connected to the first connection portion 195 in the third rotating member, and the rotation shaft of the second rotating member 281 is connected to the second connection portion 196 in the third rotating member.

[0520] Furthermore, the base end of the first operating line 41 and the base end of the second operating line 42 are fixed on the rotating component, and the base end of the third operating line 43 and the base end of the fourth operating line 44 are fixed on the second rotating component 281.

[0521] Furthermore, the third rotating component rotates in one direction, thereby being pulled, and the first operating line 41 and the second operating line 42 are pulled, thus bending the front end 11 of the medical device body 10. The third rotating component rotates in the opposite direction to the aforementioned direction, thereby being pulled, and the second rotating component 281 is pulled, and the third operating line 43 and the fourth operating line 44 are pulled, thus bending the front end 11 of the medical device body 10 in a direction different from (e.g., the opposite direction) from the bending direction of the front end 11 of the medical device body 10 based on the pull of the first operating line 41 and the second operating line 42.

[0522] Furthermore, in embodiments 2-6, examples were described in which the rotation axis of the rotating member (first rotating member 181) is connected to the third rotating member (knob operation part 194) via a line (first connecting line 192), and the rotation axis of the second rotating member 281 is connected to the third rotating member via a line (second connecting line 193), but the present invention is not limited to these examples.

[0523] For example, the rotation axis of the rotating component may be directly supported by the first connecting portion in the third rotating component, and the rotation axis of the second rotating component 281 may be directly supported by the second connecting portion in the third rotating component. In this case, the third connecting component does not need to have the aforementioned winding portion 191.

[0524] [Implementation Methods 2-7]

[0525] Next, use Figure 22 The second to seventh embodiments will be described.

[0526] The medical device 100 described in this embodiment is the same as the medical device 100 described in embodiments 2-6 above in the aspects described below, and is otherwise configured to be the same as the medical device 100 described in embodiments 2-6 above.

[0527] In this embodiment, as will be explained below, the structure of the bending operation part 80 is different from that in the embodiments 2-6 described above.

[0528] In this embodiment, the bending operation section 80 does not have the following features: Figure 21 The winding section 191, the first connecting line 192, and the second connecting line 193 are shown. Instead, the bending operation section 80 includes... Figure 22 The pinion 197, the first rack component 198, the second rack component 199, and the guide 200 are shown.

[0529] The pinion 197 is integrally formed with the knob operation section 194 on one side of the disc-shaped knob operation section 194 and is coaxially configured with the rotation axis of the knob operation section 194.

[0530] The first rack component 198 is a rod-shaped component extending in the axial direction of the medical device body 10 within the frame 86. At the front end of the first rack component 198, the first rotating component 181 (rotating component) is supported by a shaft to enable rotation. A rack is formed on one side surface of the first rack component 198 to mesh with the gear on the outer periphery of the pinion 197.

[0531] The bending operation section 80 includes, for example, a pair of front and rear guides 200 provided corresponding to the first rack member 198. Through these guides 200, the first rack member 198 is guided to move forward and backward in a straight line in the axial direction of the medical device body 10 within the frame 86.

[0532] Similarly, the second rack component 199 is a rod-shaped component extending in the axial direction of the medical device body 10 within the frame 86. At the front end of the second rack component 199, the second rotating component 281 is supported by a shaft to enable rotation. One side of the second rack component 199 has a rack that meshes with the gear on the outer periphery of the pinion 197.

[0533] The bending operation section 80 includes, for example, a pair of front and rear guides 200 provided corresponding to the second rack member 199. Through these guides 200, the second rack member 199 is guided to move forward and backward in a straight line in the axial direction of the medical device body 10 within the frame 86.

[0534] In this embodiment, the methods for engaging and fixing the first rotating member 181 with the first operating line 41 and the second operating line 42, and the methods for engaging and fixing the second rotating member 281 with the third operating line 43 and the fourth operating line 44, are the same as in embodiments 2-6.

[0535] Therefore, the rotation angle of the first rotating component 181 is automatically adjusted to a balanced angle between the tension of the first operating line 41 and the tension of the second operating line 42, and the rotation angle of the second rotating component 281 is automatically adjusted to a balanced angle between the tension of the third operating line 43 and the tension of the fourth operating line 44.

[0536] In this embodiment, the operator operating the medical device 100 holds the frame 86 or the hub 90 and rotates the knob operating part 194, thereby selectively moving the first rack member 198 or the second rack member 199, which respectively meshes with the pinion 197, toward the base end side.

[0537] That is, the knob operating part 194 was made to... Figure 22During the clockwise rotation operation, the first rack component 198 moves (retracts) towards the base end, thus pulling the first rotating component 181 towards the base end. As a result, both the first operating line 41 and the second operating line 42 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in one direction.

[0538] Furthermore, the knob operating section 194 was made to... Figure 22 During the counterclockwise rotation operation, the second rack component 199 moves (retracts) towards the base end, thus pulling the second rotating component 281 towards the base end. Consequently, both the third operating line 43 and the fourth operating line 44 are pulled towards the base end of the medical device body 10, causing the front end 11 of the medical device body 10 to bend in the opposite direction to the aforementioned direction.

[0539] In addition, when the first rack component 198 moves toward the base end side, the second rack component 199 moves toward the front end side, and when the second rack component 199 moves toward the base end side, the first rack component 198 moves toward the front end side.

[0540] Thus, in this embodiment, the bending operation unit 80, in addition to the rotating member (first rotating member 181), also includes: a second rotating member 281 and a third rotating member (knob operation unit 194), each rotatably supported by a shaft; a pinion 197 integrally and coaxially disposed with the third rotating member; a first rack member 198 connected to the rotating shaft of the first rotating member 181 and moving forward and backward in conjunction with the rotation of the pinion 197; and a second rack member 199 connected to the rotating shaft of the second rotating member 281 and moving forward and backward in conjunction with the rotation of the pinion 197 in a direction always opposite to the forward and backward direction of the first rack member 198.

[0541] The base end of the first operating line 41 and the base end of the second operating line 42 are fixed on the rotating component (first rotating component 181), and the base end of the third operating line 43 and the base end of the fourth operating line 44 are fixed on the second rotating component 281.

[0542] The third rotating component (knob operation part 194) rotates in one direction, thereby pulling the first rotating component 181 via the first rack component 198, and pulling the first operation line 41 and the second operation line 42, thereby bending the front end 11 of the medical device body 10.

[0543] Furthermore, the third rotating component rotates in the opposite direction to the aforementioned direction, thereby pulling the second rotating component 281 via the second rack component 199, and pulling the third operating line 43 and the fourth operating line 44, thereby bending the front end 11 of the medical device body 10 in a direction different from the bending direction of the front end 11 of the medical device body 10 based on the pulling of the first operating line 41 and the second operating line 42.

[0544] The embodiments have been described above with reference to the accompanying drawings, but these are merely examples of the present invention, and various structures other than those described above may also be employed.

[0545] In the above-described embodiment 2-1, the rotating mechanism of the bending operation part 80 is an example of a knob operation part 84, but the rotating mechanism of the bending operation part 80 may also be a mechanism other than a knob operation part 84 (e.g., a rotary handle).

[0546] Furthermore, in the above-described embodiment 2-1, the example of the bending operation unit 80 being configured with a rack (rack part 82c) and a pinion 83 has been described, but the bending operation unit 80 may also be configured with other conversion mechanisms (such as cam, linkage mechanism, or guide with pin and groove).

[0547] The same applies to other implementation methods.

[0548] Furthermore, in the above embodiments, examples have been described where the first operating line 41 and the second operating line 42 are composed of different thin lines. However, the first operating line 41 and the second operating line 42 may also be composed of a portion of a single thin line. That is, the single thin line may be folded back at the front ends 41a and 42a.

[0549] Similarly, the example described above of the third operating line 43 and the fourth operating line 44 being composed of different thin lines has been illustrated, but the third operating line 43 and the fourth operating line 44 may also be composed of a portion of a single thin line. That is, the single thin line may be folded back at the front ends 43a and 44a.

[0550] Furthermore, in the above embodiments, examples have been described in which the base end of the first operation line 41 and the base end of the second operation line 42 are individually fixed to the bending operation section 80. However, the base end of the first operation line 41 and the base end of the second operation line 42 may also be connected and looped in the bending operation section 80 (for example, looping in the part that engages with the rotating member 81).

[0551] Similarly, the example described above, where the base ends of the third operating line 43 and the fourth operating line 44 are individually fixed to the second bending operating section 280, can also be connected and looped in the second bending operating section 280 (for example, looping in the part that engages with the second rotating member 281).

[0552] In the above-described embodiments 2-3 ( Figure 17 , Figure 18 (a) Figure 18 (b) Figure 18 In (c), an example was described in which the first knob operation part 184 and the second knob operation part 284 are arranged to overlap each other in a direction orthogonal to their plate surfaces, and the rotation axis of the first knob operation part 184 and the rotation axis of the second knob operation part 284 are arranged to be coaxial with each other, but the present invention is not limited to this example.

[0553] For example, the rotation axis of the first knob operation unit 184 and the rotation axis of the second knob operation unit 284 may be configured on different axes. For example, the first knob operation unit 184 and the second knob operation unit 284 may also be configured at different positions in the axial direction of the medical device body 10.

[0554] Furthermore, in the above-described embodiment 2-1, an example was described in which the medical device 100 has two operating lines and these operating lines converge. In the above-described embodiment 2-3, an example was described in which the medical device 100 has four operating lines and two operating lines from each of them converge.

[0555] However, the present invention is not limited to this example. The medical device 100 may also have two operating lines extending side by side from their front end to their base end, without the operating lines converging. In this case, the two operating lines are positioned opposite each other in the circumferential direction of the medical device body 10. In this case, for example, when the medical device 100 is inserted into the body cavity using a method called OTW (Over-the-wire), the medical device body 10 is rigidified by pulling the two operating lines, thereby maintaining the medical device body 10 in a curved shape along the body cavity. In addition, when the two operating lines extend side by side from their front end to their base end, the medical device 100 may be an active catheter that allows bending of the front end 11 via the operating lines, or it may be a device whose operating lines are specifically designed to rigidify the medical device body 10. When the medical device 100 is an active catheter, as described above, by further bending the front end 11 while the medical device body 10 is rigidified, the phenomenon of the medical device body 10 rotating about its axis due to the operating lines attempting to take a shortcut can be suppressed. Similarly, in the case of four operating lines, one pair of operating lines is positioned opposite each other in the circumferential direction of the medical device body 10, and another pair of operating lines is also positioned opposite each other in the circumferential direction of the medical device body 10. Moreover, by pulling two or four operating lines together, the medical device body 10 can be rigidified to maintain its shape, or the front end 11 can be bent further in this state.

[0556] Furthermore, the above embodiments can be appropriately combined without departing from the spirit of the present invention.

[0557] This implementation method incorporates the following technical concepts.

[0558] (1) A medical device comprising: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. At the front end of the medical device body in the axial direction, the first operating line and the second operating line bend and converge toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body.

[0559] (2) The medical device according to (1), wherein, By operating the bending operation section, the first operation line and the second operation line are pulled together.

[0560] (3) The medical device according to (1) or (2), wherein, The front ends of the first operating line and the second operating line are connected to each other.

[0561] (4) The medical device according to any one of (1) to (3), wherein, At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are positioned opposite each other in the circumferential direction of the main body of the medical device.

[0562] (5) The medical device according to any one of (1) to (4), wherein, The main body of the medical device comprises: a resin tube having a lumen; and a first hollow tube and a second hollow tube embedded in the resin tube, with the first operating wire and the second operating wire respectively inserted through them. At the front end of the medical device body in the axial direction, the first hollow tube and the second hollow tube bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body.

[0563] (6) The medical device according to any one of (1) to (5), wherein, The bending operation unit is configured to include: A rotating component, rotatably supported by a shaft, engages the first operating line and the second operating line, and has the base ends of the first operating line and the second operating line fixed thereon; and The moving mechanism causes the rotating component to move in the traction direction of the first operating line and the second operating line, and in the opposite direction to the traction direction.

[0564] (7) The medical device according to any one of (1) to (6), wherein, In the circumferential direction of the front end of the medical device body, in the region between the first operating line and the second operating line, or in the region on the opposite side of the axis of the medical device body located in the middle, a flexible portion with high local bending of the medical device body is formed.

[0565] (8) The medical device according to (7), wherein, The bendable portion is configured to include a notch-shaped portion formed on the outer surface side of the medical device body.

[0566] (9) The medical device according to any one of (1) to (8), wherein, The main body of the medical device comprises a resin tube with a lumen. The first operating line and the second operating line are inserted around the lumen of the resin tube. At the front end of the curved region where the first operating line and the second operating line bend toward the front end side and gradually approach each other in the circumferential direction of the medical device body, the first operating line and the second operating line approach each other at a distance less than the wall thickness of the resin tube. Between the front end of the curved region and the front ends of the first and second operating lines, a parallel region is formed in which the first and second operating lines are close to each other and extend side by side.

[0567] (10) The medical device according to (9), wherein, Along the axial direction of the main body of the medical device, the distance from the front end of the curved region to the front end of the first operating line and the second operating line is longer than the distance from the base end to the front end of the curved region.

[0568] (11) The medical device according to (9), wherein, Along the axial direction of the main body of the medical device, the distance from the base end to the front end of the curved region is longer than the distance from the front end of the curved region to the front end of the first operating line and the second operating line.

[0569] (12) The medical device according to any one of (9) to (11), wherein, The medical device also includes an annular component embedded in the resin tube at the front end of the curved region. The annular component is configured to have higher rigidity than the resin tube and has an outer diameter smaller than the wall thickness of the resin tube. The first operating line and the second operating line are inserted through the annular component.

[0570] (13) The medical device according to (12), wherein, The main body of the medical device comprises a first hollow tube and a second hollow tube embedded in the resin tube and respectively inserted through the first operating line and the second operating line. The first hollow tube and the second hollow tube are inserted into the annular component. In the curved region, the first hollow tube and the second hollow tube bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body.

[0571] (14) The medical device according to any one of (1) to (13) comprises: The third and fourth operating lines are respectively inserted along the axial direction of the main body of the medical device; and The second bending operation unit is used to bend the front end of the medical device body in a direction different from the bending direction of the front end of the medical device body based on the traction of the first and second operation lines, by means of the traction of the third and fourth operation lines. At the middle and base portions along the axial direction of the main body of the medical device, the third and fourth operating lines are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. At the front end of the medical device body in the axial direction, the third operating line and the fourth operating line bend toward the front end side and converge toward each other in a manner that gradually approaches each other in the circumferential direction of the medical device body.

[0572] (15) The medical device according to (14), wherein, By operating the second bending operation section, the third operation line and the fourth operation line are pulled together.

[0573] (16) The medical device according to (6), wherein, The rotating component has an engaging portion that engages with the first operating line and the second operating line. The engaging portion is formed in a circular or arc shape centered on the rotation center of the rotating component.

[0574] (17) The medical device according to (6) or (16), wherein, The bending operation unit has an operation receiving unit that receives user input and performs actions accordingly. The power of the operating receiving unit is transmitted to the rotating component via the moving mechanism, thereby causing the rotating component to move in the traction direction and the opposite direction.

[0575] (18) The medical device according to (17), wherein, The operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The mobile mechanism has: The small gear is integrally and coaxially disposed with the operation receiving unit; and The rack and pinion assembly moves forward and backward in conjunction with the rotation of the pinion. The rotating component shaft is supported by the rack component.

[0576] (19) The medical device according to (14) or (15), wherein, The second bending operation unit is configured to include: A second rotating component, rotatably supported by a shaft, engages with the third and fourth operating lines, and has the base ends of the third and fourth operating lines fixed thereon; and The second moving mechanism causes the second rotating component to move in the second traction direction of the third and fourth operating lines and in the opposite direction to the second traction direction.

[0577] (20) The medical device according to (19), wherein, The second rotating component has a second engaging portion that engages with the third operating line and the fourth operating line. The second engaging portion is formed in a circular or arc shape centered on the rotation center of the second rotating component.

[0578] (21) The medical device according to (19) or (20), wherein, The second bending operation unit includes a second operation receiving unit that receives user input and performs actions accordingly. The power of the second operation receiving unit is transmitted to the second rotating member via the second moving mechanism, thereby causing the second rotating member to move in the second traction direction and in the opposite direction.

[0579] (22) The medical device according to (21), wherein, The second operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The second moving mechanism includes: The second pinion is integrally and coaxially disposed with the second operation receiving unit; and The second rack component moves forward and backward in conjunction with the rotation of the second pinion. The second rotating component is supported by the second rack component.

[0580] (23) The medical device according to any one of (1) to (13) includes a third operating line and a fourth operating line respectively inserted along the axial direction of the main body of the medical device. At the middle and base portions along the axial direction of the main body of the medical device, the third and fourth operating lines are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. At the front end of the medical device body along the axial direction, the third operating line and the fourth operating line bend and converge toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body. By operating the bending operation section to pull the third and fourth operation lines, the front end of the medical device body can be bent in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operation lines.

[0581] (24) The medical device according to (23), wherein, The bending operation unit includes a first rotating component, a second rotating component, and a third rotating component, which are rotatably supported by shafts. The rotation axis of the first rotating component is connected to the first connection portion of the third rotating component. The rotation axis of the second rotating component is connected to the second connection portion of the third rotating component. The first rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby pulling the first rotating component, and also pulling the first and second operating lines, causing the front end of the medical device body to bend. The third rotating component rotates in a direction opposite to the first direction, thereby pulling the second rotating component, and pulling the third and fourth operating lines, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operating lines.

[0582] (25) The medical device according to (23), wherein, The bending operation unit includes: The first rotating component, the second rotating component, and the third rotating component are each supported by a shaft in a rotatable manner; The pinion is integrally and coaxially arranged with the third rotating component; The first rack component is connected to the rotation shaft of the first rotating component and moves forward and backward in conjunction with the rotation of the pinion; The second rack component is connected to the rotation shaft of the second rotating component, and rotates in conjunction with the pinion to move in a direction that is always opposite to the forward and backward direction of the first rack component. The first rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby pulling the first rotating component via the first rack component, and pulling the first operating line and the second operating line, thus bending the front end of the medical device body. The third rotating component rotates in a direction opposite to the first direction, thereby being pulled via the second rack component, and the third and fourth operating lines are pulled, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pull of the first and second operating lines.

[0583] This implementation method incorporates the following technical concepts.

[0584] <1> A medical device that comprises: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. The bending operation unit includes: A rotating component, which is rotatably supported by a shaft and has the base end of the first operating line and the base end of the second operating line fixed thereon; The moving mechanism causes the rotating component to move in the traction direction of the first and second operating lines and in the opposite direction. The operation receiving unit receives user commands and performs actions accordingly. The power of the operating receiving unit is transmitted to the rotating component via the moving mechanism, thereby causing the rotating component to move in the traction direction and the opposite direction.

[0585] <2> According to the medical device described in <1>, wherein, The bending operation part has a frame. The rotating component is entirely housed within the frame.

[0586] <3> According to the medical device described in <1> or <2>, wherein, The rotating component has an engaging portion that engages with the first operating line and the second operating line. The engaging portion is formed in a circular or arc shape centered on the rotation center of the rotating component.

[0587] <4> The medical device according to any one of <1> to <3>, wherein, The operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The mobile mechanism has: The small gear is integrally and coaxially disposed with the operation receiving unit; and The rack and pinion assembly moves forward and backward in conjunction with the rotation of the pinion. The rotating component is supported by the rack component.

[0588] <5> The medical device according to any one of <1> to <4> comprises: The third and fourth operating lines are respectively inserted along the axial direction of the main body of the medical device; and The second bending operation unit is used to bend the front end of the medical device body in a direction different from the bending direction of the front end of the medical device body based on the traction of the first and second operation lines, by means of the traction of the third and fourth operation lines. The second bending operation unit includes: The second rotating component is rotatably supported by a shaft and has the base end of the third operating line and the base end of the fourth operating line fixed thereon. The second moving mechanism causes the second rotating component to move in a second traction direction and in a direction opposite to the second traction direction of the third and fourth operating lines; and The second operation receiving unit receives user commands and performs actions accordingly. The power of the second operation receiving unit is transmitted to the second rotating member via the second moving mechanism, thereby causing the second rotating member to move in the second traction direction and in the opposite direction.

[0589] <6> According to the medical device described in <5>, wherein, The bending operation part has a frame. The entire rotating component and the entire second rotating component are housed within the frame.

[0590] <7> According to the medical device described in <5> or <6>, wherein, The second rotating component has a second engaging portion that engages with the third operating line and the fourth operating line. The second engaging portion is formed in a circular or arc shape centered on the rotation center of the second rotating component.

[0591] <8> The medical device according to any one of <5> to <7>, wherein, The second operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The second moving mechanism includes: The second pinion is integrally and coaxially disposed with the second operation receiving unit; and The second rack component moves forward and backward in conjunction with the rotation of the second pinion. The second rotating component is supported by the second rack component.

[0592] <9> The medical device according to <1> includes a third operating line and a fourth operating line respectively inserted along the axial direction of the main body of the medical device. By operating the bending operation section to pull the third and fourth operation lines, the front end of the medical device body can be bent in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operation lines.

[0593] <10> According to the medical device described in <9>, wherein, The bending operation unit also includes a second rotating component and a third rotating component that are rotatably supported by a shaft. The rotation axis of the rotating component is connected to the first connection portion of the third rotating component. The rotation axis of the second rotating component is connected to the second connection portion of the third rotating component. The rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby being pulled, and the first and second operating lines are also pulled, causing the front end of the medical device body to bend. The third rotating component rotates in a direction opposite to the first direction, thereby pulling the second rotating component, and pulling the third and fourth operating lines, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operating lines.

[0594] <11> According to the medical device described in <9>, wherein, The bending operation unit includes: The second and third rotating components are each supported by a shaft in a rotatable manner; The pinion is integrally and coaxially arranged with the third rotating component; The first rack component is connected to the rotation shaft of the rotating component and rotates in conjunction with the pinion to move forward and backward; and The second rack component is connected to the rotation shaft of the second rotating component, and rotates in conjunction with the pinion to move in a direction that is always opposite to the forward and backward direction of the first rack component. The rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby being pulled via the first rack component, and the first and second operating lines are also pulled, resulting in the bending of the front end of the medical device body. The third rotating component rotates in a direction opposite to the first direction, thereby being pulled via the second rack component, and the third and fourth operating lines are pulled, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pull of the first and second operating lines.

[0595] Explanation of reference numerals in the attached figures

[0596] 10-The main body of the medical device, 11-Front end, 12-Middle section, 13-Base end, 15-Bending area, 15a - Base position, 15b - Front end position, 16-Parallel areas, 20-Resin tube, 21-Lumen, 22-Inner layer, 23-Outer layer, 31-First hollow tube, 31a-Frontend 32-Second hollow tube, 32a-Frontend 33-Third hollow tube, 34-4th hollow tube, 41-First Operation Line 41a-Front-end 42-Second Operation Line 42a-Frontend 43-Third Operation Line 43a-Frontend 44 - Fourth Operation Line 44a-Frontend 51- Braided yarn layers, 52-Wound line, 60-ring-shaped component, 61-First annular component, 62-Second ring-shaped component, 70-marker, 71-First fixing part, 72-Second fixing part, 73-3rd fixing part, 74-4th fixing part, 80-Bending operating part, 81-Rotating component, 81a-First fixing part, 81b - Second fixing part, 82-Forward and backward components (moving mechanism) 82a-Retention section, 82b - Rod-shaped part, 82c-Rack section, 83-Pinary gear (moving mechanism) 84 - Knob operation section, 85-Guide, 86-Frame, 90-wheel hub, 92-blade section, 93-Connecting part, 100-Medical Equipment 110 - Flexible section 111-Notch-shaped part, 180-First bending operation section, 181-First rotating component, 182-First forward / backward component (moving mechanism) 182a - First retaining part, 182b - First rod-shaped part, 182c - First rack section, 183 - First pinion (moving mechanism) 184 - First knob operating section, 185 - First Guide Component 191-Chapter 191 192 - First connecting line, 193 - Second connecting line, 194 - Knob operation section (3rd rotating part). 195 - First connecting part, 196-Second connecting part, 197-Small Gear 198 - First rack component, 199-Second rack component, 200-Guide, 280-Second bending operation section, 281-Second rotating component, 282-Second forward / backward component (moving mechanism) 282a - Second retaining part, 282b - Second rod-shaped part, 282c - Second rack section, 283 - Second pinion (moving mechanism) 284 - Second knob operating section, 285 - Second Guide Component.

Claims

1. A medical device comprising: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. A ring-shaped marker is provided at the front end of the main body of the medical device. The axial front end of the medical device body, as well as the base end of the marker and the vicinity of the base end, form a curved region. In this curved region, the foremost ends of the first operating line and the foremost ends of the second operating line, including the front end, bend toward the front end side and converge towards each other in a manner that gradually approaches each other in the circumferential direction of the medical device body. At the base end of the marker, the front ends of the first operating line and the second operating line are each fixed to the marker by a fixing part, and the fixing parts of the first operating line and the second operating line are adjacent to each other in the circumferential direction. The front end position of the curved region is the position of the front end where the first operating line and the second operating line are configured.

2. The medical device according to claim 1, wherein, By operating the bending operation section, the first operation line and the second operation line are pulled together.

3. The medical device according to claim 1 or 2, wherein, The front ends of the first operating line and the second operating line are connected to each other.

4. The medical device according to claim 1 or 2, wherein, At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are positioned opposite each other in the circumferential direction of the main body of the medical device.

5. The medical device according to claim 1 or 2, wherein, The bending operation unit is configured to include: A rotating component, which is rotatably supported by a shaft, engages the first operating line and the second operating line, and has the base end of the first operating line and the base end of the second operating line fixed thereon. and The moving mechanism causes the rotating component to move in the traction direction of the first operating line and the second operating line, and in the opposite direction to the traction direction.

6. The medical device according to claim 1 or 2, wherein, In the circumferential direction of the front end of the medical device body, in the region between the first operating line and the second operating line, or in the region on the opposite side of the axis of the medical device body located in the middle, a flexible portion with high local bending of the medical device body is formed.

7. The medical device according to claim 6, wherein, The bendable portion is configured to include a notch-shaped portion formed on the outer surface side of the medical device body.

8. The medical device according to claim 1, wherein, The medical device also includes an annular component embedded in the resin tube at the front end of the curved region. The annular component is configured to have higher rigidity than the resin tube and has an outer diameter smaller than the wall thickness of the resin tube. The first operating line and the second operating line are inserted through the annular component.

9. The medical device according to claim 8, wherein, The main body of the medical device comprises a first hollow tube and a second hollow tube embedded in the resin tube and respectively inserted through the first operating line and the second operating line. The first hollow tube and the second hollow tube are inserted into the annular component. In the curved region, the first hollow tube and the second hollow tube bend toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body.

10. The medical device according to claim 1, wherein, By operating the second bending operation section, the third operation line and the fourth operation line are pulled together.

11. The medical device according to claim 5, wherein, The rotating component has an engaging portion that engages with the first operating line and the second operating line. The engaging portion is formed in a circular or arc shape centered on the rotation center of the rotating component.

12. The medical device according to claim 5, wherein, The bending operation unit has an operation receiving unit that receives user input and performs actions accordingly. The power of the operating receiving unit is transmitted to the rotating component via the moving mechanism, thereby causing the rotating component to move in the traction direction and the opposite direction.

13. The medical device according to claim 12, wherein, The operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The mobile mechanism has: The small gear is integrally and coaxially disposed with the operation receiving unit; and The rack and pinion assembly moves forward and backward in conjunction with the rotation of the pinion. The rotating component is supported by the rack component.

14. The medical device according to claim 1 or 10, wherein, The second bending operation unit is configured to include: A second rotating component, rotatably supported by a shaft, engages with the third and fourth operating lines, and has the base ends of the third and fourth operating lines fixed thereon; and The second moving mechanism causes the second rotating component to move in the second traction direction of the third and fourth operating lines and in the opposite direction to the second traction direction.

15. The medical device according to claim 14, wherein, The second rotating component has a second engaging portion that engages with the third operating line and the fourth operating line. The second engaging portion is formed in a circular or arc shape centered on the rotation center of the second rotating component.

16. The medical device according to claim 14, wherein, The second bending operation unit includes a second operation receiving unit that receives user input and performs actions accordingly. The power of the second operation receiving unit is transmitted to the second rotating member via the second moving mechanism, thereby causing the second rotating member to move in the second traction direction and in the opposite direction.

17. The medical device according to claim 16, wherein, The second operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The second moving mechanism includes: The second pinion is integrally and coaxially disposed with the second operation receiving unit; and The second rack component moves forward and backward in conjunction with the rotation of the second pinion. The second rotating component is supported by the second rack component.

18. The medical device according to claim 1 or 2, wherein, It has a third operating line and a fourth operating line that are respectively inserted along the axial direction of the main body of the medical device. At the middle and base portions along the axial direction of the main body of the medical device, the third and fourth operating lines are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. At the front end of the medical device body along the axial direction, the third operating line and the fourth operating line bend and converge toward the front end side in a manner that gradually approaches each other in the circumferential direction of the medical device body. By operating the bending operation section, the third operation line and the fourth operation line are pulled, and the front end of the medical device body can be bent in a direction different from the bending direction of the front end of the medical device body based on the traction of the first operation line and the second operation line.

19. The medical device according to claim 18, wherein, The bending operation unit includes a first rotating component, a second rotating component, and a third rotating component, which are rotatably supported by shafts. The rotation axis of the first rotating component is connected to the first connection portion of the third rotating component. The rotation axis of the second rotating component is connected to the second connection portion of the third rotating component. The first rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby pulling the first rotating component, and also pulling the first and second operating lines, causing the front end of the medical device body to bend. The third rotating component rotates in a direction opposite to the first direction, thereby pulling the second rotating component, and pulling the third and fourth operating lines, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operating lines.

20. The medical device according to claim 18, wherein, The bending operation unit includes: The first rotating component, the second rotating component, and the third rotating component are each supported by a shaft in a rotatable manner; The pinion is integrally and coaxially arranged with the third rotating component; The first rack component is connected to the rotation shaft of the first rotating component and moves forward and backward in conjunction with the rotation of the pinion; The second rack component is connected to the rotation shaft of the second rotating component, and rotates in conjunction with the pinion to move in a direction that is always opposite to the forward and backward direction of the first rack component. The first rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby pulling the first rotating component via the first rack component, and pulling the first operating line and the second operating line, thus bending the front end of the medical device body. The third rotating component rotates in a direction opposite to the first direction, thereby being pulled via the second rack component, and the third and fourth operating lines are pulled, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pull of the first and second operating lines.

21. A medical device comprising: The main body of the medical device is long and narrow; The first and second operating lines are respectively inserted along the axial direction of the main body of the medical device; and The bending operation section is used to bend the front end of the medical device body by traction from the first operation line and the second operation line. At the middle and base ends along the axial direction of the main body of the medical device, the first operating line and the second operating line are separated from each other and extend side by side along the circumferential direction of the main body of the medical device. A ring-shaped marker is provided at the front end of the main body of the medical device. The axial front end of the medical device body, as well as the base end of the marker and the vicinity of the base end, form a curved region. In this curved region, the foremost ends of the first operating line and the foremost ends of the second operating line, including the front end, bend toward the front end side and converge towards each other in a manner that gradually approaches each other in the circumferential direction of the medical device body. At the base end of the marker, the front ends of the first operating line and the second operating line are each fixed to the marker by a fixing part, and the fixing parts of the first operating line and the second operating line are adjacent to each other in the circumferential direction. The front end position of the curved region is the position of the front end where the first operating line and the second operating line are configured. The bending operation unit includes: A rotating component, which is rotatably supported by a shaft and has the base end of the first operating line and the base end of the second operating line fixed thereon; The moving mechanism causes the rotating component to move in the traction direction of the first operating line and the second operating line, and in a direction opposite to the traction direction. The operation receiving unit receives user commands and performs actions accordingly. The power of the operating receiving unit is transmitted to the rotating component via the moving mechanism, thereby causing the rotating component to move in the traction direction and the opposite direction.

22. The medical device according to claim 21, wherein, The bending operation part has a frame. The rotating component is entirely housed within the frame.

23. The medical device according to claim 21 or 22, wherein, The rotating component has an engaging portion that engages with the first operating line and the second operating line. The engaging portion is formed in a circular or arc shape centered on the rotation center of the rotating component.

24. The medical device according to claim 21 or 22, wherein, The operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The mobile mechanism has: The small gear is integrally and coaxially disposed with the operation receiving unit; and The rack and pinion assembly moves forward and backward in conjunction with the rotation of the pinion. The rotating component is supported by the rack component.

25. The medical device according to claim 21, wherein, The bending operation part has a frame. The entire rotating component and the entire second rotating component are housed within the frame.

26. The medical device according to claim 21 or 25, wherein, The second rotating component has a second engaging portion that engages with the third operating line and the fourth operating line. The second engaging portion is formed in a circular or arc shape centered on the rotation center of the second rotating component.

27. The medical device according to claim 21 or 22, wherein, The second operation receiving unit is supported by a shaft in a manner that allows for rotational operation. The second moving mechanism includes: The second pinion is integrally and coaxially disposed with the second operation receiving unit; and The second rack component moves forward and backward in conjunction with the rotation of the second pinion. The second rotating component is supported by the second rack component.

28. The medical device according to claim 21, wherein, It has a third operating line and a fourth operating line that are respectively inserted along the axial direction of the main body of the medical device. By operating the bending operation section to pull the third and fourth operation lines, the front end of the medical device body can be bent in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operation lines.

29. The medical device according to claim 28, wherein, The bending operation unit also includes a second rotating component and a third rotating component that are rotatably supported by a shaft. The rotation axis of the rotating component is connected to the first connection portion of the third rotating component. The rotation axis of the second rotating component is connected to the second connection portion of the third rotating component. The rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby being pulled, and the first and second operating lines are also pulled, causing the front end of the medical device body to bend. The third rotating component rotates in a direction opposite to the first direction, thereby pulling the second rotating component, and pulling the third and fourth operating lines, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pulling of the first and second operating lines.

30. The medical device according to claim 28, wherein, The bending operation unit includes: The second and third rotating components are each supported by a shaft in a rotatable manner; The pinion is integrally and coaxially arranged with the third rotating component; The first rack component is connected to the rotation shaft of the rotating component and rotates in conjunction with the pinion to move forward and backward; and The second rack component is connected to the rotation shaft of the second rotating component, and rotates in conjunction with the pinion to move in a direction that is always opposite to the forward and backward direction of the first rack component. The rotating component has the base end of the first operating line and the base end of the second operating line fixed on it. The second rotating component has the base end of the third operating line and the base end of the fourth operating line fixed on it. The third rotating component rotates in one direction, thereby being pulled via the first rack component, and the first and second operating lines are also pulled, resulting in the bending of the front end of the medical device body. The third rotating component rotates in a direction opposite to the first direction, thereby being pulled via the second rack component, and the third and fourth operating lines are pulled, so that the front end of the medical device body bends in a direction different from the bending direction of the front end of the medical device body based on the pull of the first and second operating lines.

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