Chip and inductive device

Abstract

To provide a chip which can be guided smoothly by a guide wire, and solve difficult operation to the guide wire, by a simplified structure, and a guided tool device.SOLUTION: A chip 1 is formed into a slender cylindrical tube shape, is formed of a flexible material which can be bent, and comprises: a holding part 10; and a base part 20 which is integrally molded with the holding part 10. The holding part 10 comprises: a first opening 11 whose side face is opened along a longitudinal direction and can be opened / closed freely; a second opening 12 which is opened always; and an open hole 13 which penetrates both end parts of the chip 1. In a state in which the first opening 11 is closed, a guide wire G is held, and in a state in which the first opening is opened, the guide wire G is released. A guided tool device 50 comprises: a chip 1; a guided tool 30 for fixing the chip 1; and a sheath 40. By circumferential contact of the sheath 40 to a periphery of the holding part 10, the first opening 11 is closed, and by extruding the guided tool 30 from the sheath 40, the first opening 11 is opened.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a chip for guiding an inducer such as a cytology brush, and an inducer device having the chip.

Background Art

[0002] When performing in-vivo examination and treatment, catheters, basket forceps, cytology brushes, balloons, etc., which are inducers that reach the target site in the body by being guided by a guide wire previously inserted into the body, are used. However, since there are problems such as operability with the guide wire, several methods for solving them have been proposed (see Patent Documents 1 to 3).

[0003] Patent Document 1 discloses that a guide wire lumen is formed on the distal side of a catheter body, and a target lumen that extends from the proximal side to the distal side within the catheter body and guides a device, a drug, etc. is provided. The distal end of the target lumen communicates with the guide wire lumen, and it is disclosed that a more efficient monorail type catheter can be provided.

[0004] Patent Document 2 discloses basket forceps provided with a guide wire insertion hole that communicates between the front surface and the outer peripheral surface of the tip chip. It is easy to be guided to the target site by the guide of the guide wire, and it is easy to take in stones inside the basket part.

[0005] Patent Document 3 discloses an endoscopic treatment tool in which a tip chip having an insertion hole through which a guide wire is inserted is provided at the tip of a treatment part, and the treatment part and the tip chip are rotatably connected to each other around an axis extending in the longitudinal direction of the operation wire via a connecting part. It is disclosed that the sheath is maintained thin and soft, and the treatment part can be operated quickly and appropriately according to various situations.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-135744 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-19937 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-263159 [Summary of the Invention] [Problems to be Solved by the Invention]

[0007] In the catheter of Patent Document 1, by adopting a monorail type (rapid exchange type), the length of the portion guided by the guide wire in the catheter is shortened, and the operability of the catheter is improved. In the basket forceps of Patent Document 2, by inserting a guide wire through the tip chip, the length of the guide wire inserted into the sheath (a tube similar to a catheter) is shortened to improve the operability, and in particular, it is easier to capture a calculus inside the basket in the basket forceps.

[0008] In the endoscopic treatment instrument of Patent Document 3, taking the divisional application of Patent Document 2 as a known technique, in the configuration provided with a tip chip, when the brush is rotated around the axis, the guide wire also rotates around the axis through the tip chip, so that the operation wire and the guide wire are entangled, and it solves the problem that proper operation becomes difficult. And when the operation wire is rotated around the axis, the treatment portion rotates accordingly. However, due to the connecting portion, only the operation wire and the treatment portion rotate while the tip chip does not move, so it is said that even if the operation wire and the treatment portion are rotated, it is possible to prevent the guide wire from being entangled with the operation wire.

[0009] However, if the guide wire is always inserted into the tip (the leading tip), the positional relationship with the guide wire becomes a problem. In Patent Document 2, it is necessary to greatly separate the guide wire from the elastic wire, which makes the operation difficult under an endoscope within the thin tube tissue in the body. Further, Patent Document 3 has a problem in that it has a complicated structure in order to perform both prevention of detachment and rotational movement.

[0010] In view of the above circumstances, an object of the present invention is to provide a tip and a guided device that enable smooth guidance by a guide wire, have a simple structure, and eliminate difficult operations on the guide wire.

Means for Solving the Problems

[0011] As a result of continuous intensive research and development regarding the above-described problems, the inventor of the present invention has found an epoch-making tip and guided device as follows.

[0012] A first aspect of the present invention for solving the above problems is a tip that moves along a guide wire previously inserted into the body, comprising: a holding portion that holds the guide wire; a base portion connected to the holding portion; and a through hole that penetrates the holding portion and the base portion. In the holding portion, a first opening that opens along the longitudinal direction of the holding portion and a second opening connected to the first opening are formed. The first opening is openable and closable, the second opening is always open, and when the first opening is closed, the guide wire is held, and when the first opening is open, the guide wire is released.

[0013] According to such a first aspect, by closing the first opening to hold the guide wire, the chip can surely reach the target site in the body along the guide wire. Further, by opening the first opening, the guide wire is released, and the chip and the guide wire can operate independently. That is, the holding and release of the guide wire can be realized with a simple structure only by the opening and closing operation of the first opening. And the guidance by the guide wire is smooth, and difficult operations on the guide wire can be eliminated with a simple structure.

[0014] A second aspect of the present invention is the chip according to the first aspect, wherein the chip has a cylindrical tube shape and is formed from a bendable material having flexibility, and in a state where the first opening is closed, the arrangement direction of the guide wire and the central axis of the chip are substantially coincident.

[0015] Here, "substantially coincident" is a concept including not only complete coincidence but also a state where they are arranged so as to have a certain angle (for example, an angle within 5 degrees between the guide wire and the central axis of the chip).

[0016] According to such a second aspect, when the chip moves on the guide wire, it can surely move in the body along the arrangement direction of the guide wire (axial direction of the portion of the guide wire to be clamped), and can accurately follow the guide wire particularly in an organ where the moving direction changes complicatedly.

[0017] A third aspect of the present invention is the chip according to the first or second aspect, wherein in a state where the first opening is closed, the outer diameter of the through hole of the first opening is larger than the outer diameter of the guide wire.

[0018] According to such a third aspect, the holding of the guide wire by the first opening is a loose fit, and the friction with the guide wire can be minimized during the movement of the chip, so that the chip can be guided smoothly.

[0019] The fourth aspect of the present invention is the chip according to any one of the first to third aspects, wherein the holding portion has a predetermined length.

[0020] According to such a fourth aspect, the holding of the guide wire by the first opening is stabilized, and the movement along the guide wire becomes easy.

[0021] The fifth aspect of the present invention is the chip according to any one of the first to fourth aspects, wherein the outer diameter of the holding portion is larger than the outer diameter of the base portion.

[0022] In such a fifth aspect, it is possible to secure a size for holding the guide wire and to reduce the size of the base portion that does not hold the guide wire, thereby achieving weight reduction and cost reduction.

[0023] The sixth aspect of the present invention is a guided device including the chip according to any one of the first to fifth aspects, a guided object fixed to the tip side of the chip, and a cylindrical sheath covering the chip and the guided object.

[0024] According to such a sixth aspect, the guided object and the sheath can reach the target site in the body by the guidance of a chip having a simple structure, and the guided object can be operated independently of the guide wire. Therefore, entanglement with the guide wire is eliminated, and treatment with a smooth guided object becomes possible.

[0025] The seventh aspect of the present invention is the guided device according to the sixth aspect, wherein when at least a part of the holding portion is covered by the sheath, the first opening is closed, and when the holding portion is separated from the sheath, the first opening is opened.

[0026] According to such a seventh aspect, the opening and closing of the first opening can be easily performed by the operation of attaching and detaching the sheath to and from the holding portion.

[0027] The eighth aspect of the present invention is the guided device according to the sixth or seventh aspect, characterized in that in a state where the first opening is closed, the moving direction of the guided device is substantially parallel to the arrangement direction of the guide wire.

[0028] According to such an eighth aspect, the in-body movement of the guided device can be smoothly performed along the guide wire without resistance.

[0029] The ninth aspect of the present invention is the guided device according to any one of the sixth to eighth aspects, characterized in that the sheath is provided with a sheath through-hole penetrating both ends of the sheath, and a communication hole communicating the sheath through-hole with the outer surface of the sheath is provided on the distal end side of the sheath, and in a state where the first opening is closed, the second opening of the holding portion and the communication hole are arranged to overlap each other.

[0030] According to such a ninth aspect, the insertion ports of the guide wires are gathered at one location, it is easy to insert the guide wires, and the resistance during the in-body movement of the guided device can be eliminated.

[0031] The tenth aspect of the present invention is the guided device according to any one of the sixth to ninth aspects, characterized in that when the sheath circumferentially contacts the outer periphery of the holding portion and the first opening is closed, the guide wire is inserted through the distal end of the holding portion, the second opening, and the communication hole, and when the sheath is separated from the holding portion and the first opening is open, the guide wire is inserted through the distal end of the sheath and the communication hole.

[0032] According to the tenth aspect, reliable guidance by the guide wire and an appropriate positional relationship at the target site are ensured, and endoscopic surgery or the like centered on the guide wire can be realized. Further, after the first opening is opened and the guide wire is released from the tip, when the tip is moved in the direction opposite to the tip side (front side) of the communication hole, the guide wire does not contact the tip and is inserted into the communication hole. When the guided device is removed in this state, only the guide wire can be left in the body. As a result, different guided devices can be easily inserted into the body using the guide wire. That is, since the guided device of the present embodiment can be removed so as to leave only the guide wire in the body, different guided devices can be easily inserted into the body using the guide wire.

[0033] The eleventh aspect of the present invention is the guided device according to any one of the sixth to tenth aspects, wherein the guided device is a cytology brush having a brush.

[0034] According to the eleventh aspect, the brush can be moved back and forth or rotated without getting entangled with the guide wire, and as a result, cells can be appropriately collected.

Brief Description of Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0036] Hereinafter, embodiments of the chip according to the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiments. (Embodiment 1)

[0037] FIG. 1 shows an example of the chip according to the present invention, (a) is a schematic side view, (b) is a schematic cross-sectional view taken along line A-A of (a), and (c) is a schematic cross-sectional view taken along line B-B of (a). FIG. 2 shows a cross-section of the chip based on FIG. 1, (a) shows the state when the first opening is closed, and (b) shows the state when the first opening is open. Based on FIGS. 1 and 2, the chip of this embodiment will be described in detail.

[0038] As shown in FIG. 1, the chip 1 of this embodiment has an elongated cylindrical tube shape, is formed from a flexible and bendable material, and includes a holding portion 10 and a base portion 20 integrally formed with the holding portion 10.

[0039] The holding portion 10 has a first opening 11 whose side surface opens along the longitudinal direction (central axis direction), a second opening 12 formed continuously with the first opening 11 and opening between the first opening 11 and the base portion 20, and a through hole 13 penetrating both ends of the chip 1. The first opening 11 can be opened and closed, and the guide wire G can be held and released by opening and closing the first opening 11.

[0040] The second opening 12 is always open and serves as an insertion hole for the guide wire G when the guide wire G is held by the first opening 11. For example, if the tip of the first opening 11 is the inlet of the guide wire G, the second opening 12 serves as the outlet.

[0041] Then, as shown in FIG. 2(a), when the first opening 11 of the chip 1 closes, the guide wire G is held within the through hole 13, and as shown in FIG. 2(b), when the first opening 11 opens, the guide wire G is released from the chip 1.

[0042] In the state where the first opening 11 is closed, the inner surface of the through hole 13 of the first opening 11 is slidably circumferentially in contact with the guide wire G, and this circumferential contact state is such that the arrangement direction of the guide wire G and the central axis direction of the chip 1 are substantially coincident. When the chip 1 is moving inside the body, the arrangement direction of the guide wire G and the central axis of the chip 1 may deviate slightly depending on the moving direction, but they are substantially coincident in the stationary state. Thereby, the chip 1 can move smoothly along the arrangement direction of the guide wire G.

[0043] Also, inside the body, since the chip 1 is induced to move by the guide wire G, even in the state where the first opening 11 is closed, the diameter of the through hole 13 formed by the first opening 11 is larger than the outer diameter of the guide wire G, minimizing the resistance due to friction etc. during movement and improving the operability.

[0044] When the chip 1 moves along the pre-inserted guide wire G, since the guide wire G is held by the holding portion 10, the chip 1 can be accurately and easily reached to the target site. Then, after the chip 1 reaches the target site, the first opening 11 opens, and the guide wire G is released and separated from the chip 1, enabling the chip 1 to operate independently from the guide wire G.

[0045] Here, since the holding part 10 has a predetermined length, it can hold the guide wire G so as to wrap it, and the guide wire G will not come off even during complex movement inside the body. Here, the "predetermined length" is not particularly limited, and examples include 2 mm to 20 mm, 2 mm to 10 mm, or 2 mm to 5 mm, etc. Also, the outer diameter of the holding part 10 is formed larger than the outer diameter of the base part 20, so that a size for holding the guide wire G can be ensured. Compared with a constant diameter, the weight can be reduced, and the cost can be reduced.

[0046] The material of the chip 1 may be a metal such as stainless steel. However, in the case of such a hard material, it may damage the guide wire G, and a material softer than the following metals is preferred. As the material of the chip 1, for example, it can be selected from materials such as fluororesin (polytetrafluoroethylene, EEP), various rubbers (silicone rubber), various elastomers (polyamide elastomer, polyester elastomer), and other various plastics (polyamide, ethylene vinyl acetate copolymer, polyethylene, polypropylene, polyether ether ketone, polycarbonate, polysulfone, acrylonitrile butadiene styrene).

[0047] The base part 20 integrally formed with the holding part 10 is cylindrical and is connected to the object to be guided 30 guided by the guide wire G. In this embodiment, the object to be guided 30 is exemplified by a cytology brush and will be described below.

[0048] FIG. 3 is a schematic side view showing an example of the object to be guided with the chip according to this embodiment fixed thereto. The cytology brush will be described based on this figure.

[0049] The cytological brush 30a is a medical instrument for examination used in cytological examinations that collect cells in the body and examine the cells. It includes a shaft 31 made of an elongated wire or the like, a brush 32 provided on one end side of the shaft 31, and an operation unit 33 provided on the other end side. The connection between the chip 1 and the shaft 31 is performed, for example, by inserting and fixing the tip of the shaft 31 on the side where the brush 32 is disposed into the through hole 13 of the base portion 20 of the chip 1, but an adhesive, welding, or the like may also be used, and the fixing method is not limited.

[0050] Next, FIG. 4 is a cross-sectional view showing an example of the sheath according to the present embodiment. The sheath will be described based on this figure.

[0051] When the cytological brush 30a is inserted into the body, the cytological brush 30a is covered with the sheath 40. The sheath 40 is a tube having an elongated cylindrical tube shape, formed of a resin or the like having flexibility, and provided with a sheath through hole 41 penetrating both ends in the center of the diameter.

[0052] Further, a communication hole 42 communicating the sheath through hole 41 and the outer surface of the sheath 40 is provided on the tip side of the sheath 40, and the guide wire G passes through the communication hole 42 from the outer surface of the sheath 40 into the sheath through hole 41 and is exposed from the tip of the sheath 40. Here, the other end side of the sheath 40 may be interlocked with the operation unit 33 attached to the cytological brush 30a, or may be provided with an operation unit or the like separately and independently.

[0053] The communication hole 42 has an elongated hole shape along the axial direction of the sheath 40, and in a state where the cytological brush 30a is guided by the guide wire G, the guide wire G does not get entangled with the sheath 40 or the like, and the sheath 40 and the cytological brush 30a can move smoothly.

[0054] Since the tip of the guide wire G can be moved to the target site in the body in advance using an endoscope or the like, the tip of the sheath 40 can also be guided to the target site by inserting the guide wire G through the communication hole 42. There is also a method of inserting the guide wire G throughout the inside of the sheath 40, but in that case, the guide wire G and the brush 32 will interfere with each other, or the shaft 31 needs to have a hollow structure through which the guide wire G is inserted. Therefore, in the present embodiment, a monorail type is adopted in which the guide wire G is inserted through the inside of the sheath 40 on the tip side of the sheath 40, and the guide wire G is arranged outside the sheath 40 from the communication hole 42 of the sheath 40.

[0055] The outer diameter of the sheath 40 is sized such that the chip 1 and the brush 32 can be accommodated on the tip side when the cytology brush 30a enters the body. It is preferable that the outer diameter of the holding portion 10 of the chip 1 when the guide wire G is inserted is larger than the inner diameter of the sheath 40. When the holding portion 10 is covered by the sheath 40, the outer diameter of the holding portion 10 is reduced by the approach of the first opening 11 of the holding portion 10, and the guide wire G can be stably held. Note that the outer diameter of the sheath 40 may be constant, or the tip side may be thick and the rest may be thin.

[0056] The sheath 40 can be formed, for example, by extrusion molding and stretching a thermoplastic resin. Examples of the thermoplastic resin include fluorine-based such as FEP and PTFE, polyolefin-based such as polyethylene and polypropylene, PBT, PET, PVDF, polystyrene-based, vinyl chloride-based, urethane-based, and elastomers such as amide-based.

[0057] FIG. 5 is a side view showing the guided device according to the present invention. FIG. 6 is a side view of the tip portion of FIG. 5 viewed from another angle. FIG. 7 is a side view showing a state in which the guide wire is released in FIG. 5. Based on FIGS. 5 to 7, the guided device will be described.

[0058] The guided tool device 50 includes a chip 1, a guided tool 30 fixing the chip 1, and a sheath 40. In the present embodiment, an example of the guided tool 30 is a cytology brush 30a.

[0059] By inserting the cytology brush 30a into the sheath 40, the cytology brush 30a and the sheath 40 can be integrated. At this time, the outer surface of the first opening 11 of the chip 1 and the inner surface of the sheath 40 are circumferentially in contact, and the first opening 11 is in a closed state. At the same time, when the communication hole 42 of the sheath 40 and the second opening 12 overlap, the guide wire G is in a communicated state within the holding portion 10. Note that in the closed state of the first opening 11, the distal end side end portion of the sheath 40 and the distal end side end portion of the first opening 11 may be in contact or close to each other. That is, all of the first opening 11 may be housed within the sheath, or a part of the first opening 11 may be housed within the sheath such that a part of the distal end side of the first opening 11 protrudes from the sheath.

[0060] Since the chip 1 and the sheath 40 have a cylindrical tube shape, the surface of the sheath through hole 41 of the sheath 40 can evenly sandwich the outer periphery of the holding portion 10 of the chip 1, and the central axis of the chip 1 is arranged along the central axis of the sheath 40. Further, since the central axis of the chip 1 substantially coincides with the arrangement direction of the guide wire G (the axial direction of the portion of the guide wire to be sandwiched), the outer periphery of the guide wire G can be evenly held. As a result, the wobbling during the movement of the sheath 40 and the cytology brush 30a in the body is reduced, and stable movement and improved operability can be achieved. In particular, the movement in the body is performed under an endoscope, so the operation is difficult, but the use of the guided tool device 50 of the present embodiment can reduce the burden on the operator (doctor) who performs the operation. Further, as in Patent Documents 2 and 3, when there is a chip in a direction inclined with respect to the arrangement direction of the guide wire G, there is a problem that smooth movement is suppressed due to resistance during operation, but the present invention solves this problem.

[0061] Then, by inserting the guide wire G into the chip 1, the cytology brush 30a and the sheath 40 can be moved along the guide wire G. Further, as shown in FIG. 6, since the second opening 12 of the holding portion 10 and the communication hole 42 of the sheath 40 are arranged to overlap (communicate), the opening portions for inserting the guide wire G are gathered at one location, and the guide wire G and the guided device 50 can be arranged in a straight line. As a result, the cytology brush 30a and the sheath 40 are guided by the guide wire G (see the arrow direction in FIG. 6) and can smoothly reach the target part in the body.

[0062] Such movement can be realized only by arranging the cytology brush 30a in the sheath 40, covering the chip 1 with the sheath 40 to close the first opening 11, then inserting the guide wire G from the tip of the holding portion 10 so that the first opening 11 wraps around it, and arranging the guide wire G outside the sheath 40 from the second opening 12 and the communication hole 42 of the sheath 40.

[0063] The first opening 11 of the holding portion 10 is closed by being covered with the sheath 40, and the guide wire G can be slidably held. That is, the outer surface of the holding portion 10 is covered with the sheath 40 so as to close the first opening 11, and the outer surface of the holding portion 10 and the inner surface of the sheath through hole 41 of the sheath 40 are in circumferential contact, thereby suppressing the opening of the first opening 11. Then, while holding the guide wire G with the holding portion 10, it can slide, and the chip 1 can reach the target site in the body by the guidance of the guide wire G. <Release of the guide wire G>

[0064] When the chip 1 reaches the target site (the tissue site to be examined), by operating the operation unit 33 to push out the chip 1 and the brush 32 forward of the sheath 40, the holding part 10 is detached from the sheath 40 and the first opening 11 is opened. As a result, the guide wire G is released from the holding part 10 and moves to a position spaced outside the chip 1. Here, since the guide wire G is inserted into the sheath 40 on the tip side of the sheath 40, the tip side of the sheath 40 does not deviate from the target site, the brush 32 can surely perform cell uptake at the target site, and at the same time, entanglement-free sampling with the guide wire G can be realized.

[0065] In particular, when collecting cells from the tissue site to be examined, the brush 32 is pressed against the tissue site to be examined and rotated around the axis of the brush 32. During rotation, since the guide wire G and the cytology brush 30a are separated and independent, it is possible to prevent the brush 32 from being entangled with the guide wire G. That is, cells from the tissue site to be examined can be collected by rotating the brush 32 around its axis without removing the guide wire G. Also, when operating other guiding tools 30 such as a balloon, a catheter, a stent, and basket forceps instead of the brush 32, it is no longer necessary to remove the guide wire G.

[0066] The cell collection is completed by rotating the brush 32 or the like to collect cells from the tissue site to be examined, inserting the brush 32 into the sheath 40 again, and removing the chip 1, the cytology brush 30a, and the sheath 40 from the body.

[0067] FIG. 8 is a schematic diagram showing the collection of tumor tissue formed in the major duodenal papilla. Based on FIG. 8, an example of the use of the guiding tool device 50 will be described.

[0068] As shown in this figure, a tumor 103 has occurred near the major duodenal papilla 102 at the boundary between the duodenum 100 and the common bile duct 101. A cytological examination is performed to determine whether this tumor 103 is benign or malignant. The guide wire G is inserted near the tumor 103, and the guided device 50 is guided by the guide wire G to reach the tumor 103, which is the target site. Since the internal organs are complex and are guided endoscopically while bending in various directions, the holding portion 10 of the tip 1 holds the guide wire G, so that the cytological brush 30a can be smoothly sent to the target site. At the target site, by pushing the cytological brush 30a forward of the sheath 40, the first opening 11 of the holding portion 10 opens, and the guide wire G and the cytological brush 30a are separated and become independent. By rotating the brush 32 while rubbing it against the tumor 103, some cells of the tumor 103 can be collected. (Other embodiments)

[0069] In the above-described embodiment, a cytological brush is described as an example of the guided device, but the present invention is not limited thereto. Examples of the guided device include a balloon, a catheter, a basket forceps, and the like.

[0070] Also, in the above-described embodiment, the holding portion and the base portion are integrally formed, but the present invention is not limited thereto. For example, the holding portion and the base portion may be formed separately and connected (joined) to each other.

[0071] Furthermore, in the above-described embodiment, the tip is configured such that the outer diameter of the holding portion is larger than the outer diameter of the base portion, but the present invention is not limited thereto. For example, the tip may be configured such that the outer diameter of the holding portion is the same as the outer diameter of the base portion. Even with this configuration, the same effects as those of the above-described embodiment can be obtained.

[0072] The tip and the guided device of the present invention can accurately and easily reach the target site, and after reaching, the guide wire can be released to enable independent movement (forward and backward movement, sliding, rotation, etc.) from the guide wire, so that the entanglement between the guide wire and the guided device and the influence of the guide wire can be suppressed as much as possible.

[0073] The chip of the present invention is a chip that moves along a guide wire previously inserted into the body, and includes a holding part that holds the guide wire, a base part integrally formed with the holding part, and a through hole that penetrates the holding part and the base part. In the holding part, a first opening that opens along the longitudinal direction of the holding part and a second opening connected to the first opening are formed. The first opening can be opened and closed, and the second opening is always open. When the first opening is closed, the guide wire is held, and when the first opening is open, the guide wire can be released.

[0074] Thus, since the first opening is closed to hold the guide wire, the chip can surely reach the target site in the body along the guide wire. Also, by opening the first opening, the guide wire is released, and the chip and the guide wire can operate independently. In this way, the holding and release of the guide wire can be realized with a simple structure by only the opening and closing operation of the first opening. And the guidance of the guided tool by the guide wire is smooth, and difficult operations on the guide wire can be eliminated with a simple structure.

[0075] As an aspect of the chip of the present invention, for example, the chip has a cylindrical tube shape and is formed from a flexible and bendable material. In a state where the first opening is closed, the arrangement direction of the guide wire and the central axis of the chip are substantially coincident. Thereby, when the chip moves on the guide wire, it can surely move in the body along the arrangement direction of the guide wire, and the chip can accurately follow the guide wire even in an organ where the moving direction changes complicatedly.

[0076] As an aspect of the chip of the present invention, for example, in a state where the first opening is closed, the outer diameter of the through hole of the first opening is larger than the outer diameter of the guide wire. Thereby, the holding of the guide wire by the first opening is a loose fit, and the friction with the guide wire during the movement of the chip can be minimized, and the chip can be smoothly guided.

[0077] For example, as one aspect of the chip of the present invention, the holding portion has a predetermined length. Thereby, the holding of the guide wire by the first opening is stabilized, and the movement along the guide wire becomes easy.

[0078] For example, as one aspect of the chip of the present invention, the outer diameter of the holding portion is larger than the outer diameter of the base portion. Thereby, it is possible to secure a size for holding the guide wire and to miniaturize the base portion that does not hold the guide wire, so that weight reduction and cost reduction can be achieved.

[0079] The guided device of the present invention includes a guided device that fixes the chip on the tip side, and a cylindrical sheath that covers the chip and the guided device. Thereby, the guided device and the sheath can reach the target site in the body by the guidance of a chip having a simple structure, and the guided device can be operated independently of the guide wire, so that entanglement with the guide wire is eliminated, and treatment with a smooth guided device becomes possible.

[0080] For example, as one aspect of the guided device of the present invention, when at least a part of the holding portion is covered by the sheath, the first opening is closed, and when the holding portion is separated from the sheath, the first opening is opened. Thereby, the first opening can be easily opened and closed by the operation of attaching and detaching the sheath.

[0081] For example, as one aspect of the guided device of the present invention, in a state where the first opening is closed, the moving direction of the guided device is substantially parallel to the arrangement direction of the guide wire. Thereby, the movement of the guided device in the body can be smoothly performed along the guide wire without resistance.

[0082] As one aspect of the guided device of the present invention, for example, the sheath is provided with a sheath through-hole penetrating both end portions of the sheath, and a communication hole communicating the sheath through-hole and the outer surface of the sheath is provided on the distal end side of the sheath. In a state where the first opening is closed, the second opening of the holding portion and the communication hole are arranged to overlap each other. Thereby, the insertion ports of the guide wires are gathered at one location, making it easy to insert the guide wires and eliminating the resistance during the movement of the guided device inside the body.

[0083] As one aspect of the guided device of the present invention, for example, when the sheath circumferentially contacts the outer periphery of the holding portion and the first opening is closed, the guide wire is inserted between the distal end of the holding portion, the second opening, and the communication hole. When the sheath is separated from the holding portion and the first opening is open, the guide wire is inserted between the distal end of the sheath and the communication hole. Thereby, reliable guidance by the guide wire and an appropriate positional relationship at the target site are ensured, enabling endoscopic surgery or the like centered on the guide wire.

[0084] As one aspect of the guided device of the present invention, for example, the guided tool is a cytology brush having a brush. Thereby, the brush can be moved back and forth and rotated without getting entangled with the guide wire. As a result, cells can be appropriately collected.

[0085] Note that the present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. In addition, the material, shape, dimensions, numerical values, form, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

Industrial Applicability

[0086] The chip and the guided device of the present invention are optimal for fields where it is desired to be reliably guided to the target site with a simple structure and not get entangled with the guide wire.

Explanation of Reference Numerals

[0087] 1 Chip 10 Holding Portion 11 First opening 12 Second opening 13 Through-hole 20 Base portion 30 Induced device 30a Cytological brush 31 Shaft 32 Brush 33 Operating portion 40 Sheath 41 Sheath through-hole 42 Communication hole 50 Induced device apparatus 100 Duodenum 101 Common bile duct 102 Major duodenal papilla 103 Tumor G Guide wire

Claims

1. A chip that moves along a guide wire pre-inserted into the body, comprising: a holding portion that holds the guide wire; a base portion connected to the holding portion; a through hole that penetrates the holding portion and the base portion; wherein an outer diameter of the holding portion is larger than an outer diameter of the base portion; the holding portion is formed with a first opening that opens along a longitudinal direction of the holding portion; a second opening connected to the first opening; the first opening is openable and closable, and the second opening is always open; when the first opening is closed, the guide wire is held, and when the first opening is open, the guide wire is released. A chip.

2. The chip has a cylindrical tube shape and is formed from a flexible and bendable material. When the first opening is closed, an arrangement direction of the guide wire and a central axis of the chip substantially coincide. The chip according to claim 1.

3. When the first opening is closed, an outer diameter of the through hole at a position where the first opening is provided is larger than an outer diameter of the guide wire. The chip according to claim 1 or 2.

4. The holding portion has a predetermined length. The chip according to any one of claims 1 to 3.

5. A chip according to any one of claims 1 to 4, a guided tool for fixing the chip at a tip side, and a cylindrical tube-shaped sheath covering the chip and the guided tool. A guided tool device.

6. When at least a part of the holding portion is covered by the sheath, the first opening is closed. When the holding portion is separated from the sheath, the first opening is open. The guided tool device according to claim 5.

7. When the first opening is closed, a moving direction of the guided tool device is parallel to an arrangement direction of the guide wire. The guided tool device according to claim 5 or 6.

8. The sheath is provided with a sheath through hole that penetrates both ends of the sheath. On a tip side of the sheath, a communication hole communicating the sheath through hole and an outer surface of the sheath is provided. When the first opening is closed, the second opening of the holding portion and the communication hole are arranged to overlap. The guided tool device according to any one of claims 5 to 7.

9. In a state where the sheath circumferentially contacts the outer periphery of the holding portion and the first opening is closed, the guide wire is inserted through the tip of the holding portion, the second opening, and the communication hole, In a state where the sheath is separated from the holding portion and the first opening is open, the guide wire is inserted through the tip of the sheath and the communication hole, which is characterized by The guided device according to claim 8.

10. The guided device is a cytological brush having a brush, which is characterized by The guided device according to any one of claims 5 to 9.

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