Medical catheter handle and catheter having the same

Abstract

To provide a medical catheter handle and a catheter having the same which can smoothly operate a handle.SOLUTION: A medical catheter handle 1 includes: a slider 4 having a spirally-extending first engagement part 16 and which is displacable in an axial direction; a rotational knob 5 having a second engagement part 17 that engages with the first engagement part 16; a first wire 6 and a second wire 7 with a distal end thereof being provided in a lumen of a tube 22 and with a proximal end being provided in the lumen of the rotational knob 5; a linear member 8 with a first end thereof being connected to the proximal part of the first wire 6 by a first connection part 9 and with a second end thereof being connected to the proximal part of the second wire 7 by a second connection part 10; and a reverse guide 14 to which the part of the linear member 8 is in contact. A part closer to the first end side than the contact part with the first wire 6 or the reverse guide 14 of the linear member 8 is fixed to the slider 4. In a state where the slider 4 is displaced to the most proximal side, the second connection part 10 is positioned closer to a proximal side than the proximal end of the slider 4.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a medical catheter handle for use in a catheter, and to a catheter equipped with the same. [Background technology]

[0002] A catheter is usually composed of a tube for insertion into a body cavity such as a blood vessel, a digestive tract, or a urinary tract, and a handle provided on the proximal side of the tube. A catheter configured so that the distal end of the tube can be bent by operating the handle on the hand side is known. In such a catheter, a wire is arranged in the lumen of the tube, the distal end of the wire is fixed to the distal end of the tube, and the proximal end of the wire is connected to the handle, so that the distal end of the tube can be bent by operating the handle. For example, in a catheter in which two wires are arranged in the lumen of the tube, the distal end of the tube can be bent to one side by pulling one of the two wires proximally by operating the handle, and the distal end of the tube can be bent to the other side by pulling the other wire.

[0003] As such a catheter handle, for example, Patent Document 1 discloses a catheter handle having two control wires whose tip ends are connected to a tip region of a catheter, the catheter handle comprising a housing, a sliding assembly disposed within the housing and configured to translate linearly within the housing, and a control knob rotatably provided relative to the housing, the proximal ends of the two control wires are disposed within the housing, the sliding assembly is configured to operate each of the two control wires separately by linearly translating the sliding assembly, and the sliding assembly is configured such that rotating the control knob in a first rotational direction causes the sliding assembly to displace toward the tip side and apply tension to one of the two control wires, thereby deflecting the catheter in a first deflection direction, and that rotating the control knob in a second rotational direction causes the sliding assembly to displace toward the base end side and apply tension to the other of the two control wires, thereby deflecting the catheter in a second deflection direction.

[0004] Patent Document 2 discloses a catheter handle for deflecting a distal portion of a catheter, the catheter handle having a first rotating member having a first diameter and to which a first wire is connected, and a second rotating member having a second diameter smaller than the first diameter and to which a second wire is connected, the second rotating member being connected to the first rotating member such that a center point of the second rotating member is offset from a center point of the first rotating member, and the first and second rotating members are configured such that rotation of the first rotating member via the first wire rotates the second rotating member and the second wire to deflect the distal portion of the catheter. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2015-523892 [Patent Document 2] Special Publication No. 2018-515215 Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, various catheter handles have been proposed in the past, and an object of the present invention is to provide a catheter handle having a novel structure that allows smooth operation of the handle, and a catheter equipped with the same. [Means for solving the problem]

[0007] The catheter handle of the present invention, which is able to solve the above-mentioned problems, and a catheter equipped with said catheter handle, are as follows. [1] A handle for operating a catheter tube, a handle body having an inner lumen extending axially from a proximal side to a distal side; a shaft disposed in a lumen of the handle body, extending in the axial direction, and fixed to the handle body; a slider disposed on the outside of the shaft, having a first engagement portion extending in a spiral shape on an outer surface thereof, and being provided displaceable in the axial direction along the shaft; a rotation knob having a rotation shaft extending in the axial direction and rotatably provided with respect to the handle body, the rotation knob having an inner cavity extending in the axial direction and a second engagement portion on an inner surface thereof that engages with the first engagement portion of the slider; a first wire having a distal portion disposed within the lumen of the tube and a proximal portion disposed within the lumen of the rotatable knob; a second wire having a distal portion disposed within the lumen of the tube and a proximal portion disposed within the lumen of the rotatable knob; a linear member disposed in an inner cavity of the handle body, the linear member having a first end on one end side and a second end on the other end side, the first end being connected to a proximal portion of the first wire at a first connecting portion, and the second end being connected to a proximal portion of the second wire at a second connecting portion; a reversal guide disposed in an inner cavity of the handle body and in contact with a portion of the linear member; the first wire or a portion of the linear member closer to the first end than a portion of the linear member that abuts against the reversing guide is fixed to the slider, A medical catheter handle in which, when the slider is displaced most proximally, the second connection portion is located proximal to the proximal end of the slider. [2] The medical catheter handle described in [1], wherein the linear member has a bending rigidity lower than that of the first wire and the second wire. [3] A medical catheter handle as described in [1] or [2], wherein the first wire and the second wire are metal wires, and the linear member is a fiber rope. [4] A medical catheter handle described in any one of [1] to [3], wherein the first wire is fixed to the slider, and when the slider is displaced most proximally, the first connection portion is located proximal to the proximal end of the slider. [5] The medical catheter handle according to any one of [1] to [3], wherein a portion of the linear member closer to the first end than the abutting portion with the reversal guide is fixed to the slider. [6] The medical catheter handle according to any one of [1] to [5], wherein one of the first engagement portion and the second engagement portion is a convex portion and the other is a groove. [7] A catheter comprising a medical catheter handle according to any one of [1] to [6] and a tube provided on the distal side of the medical catheter handle. Effect of the Invention

[0008] According to the medical catheter handle and catheter of the present invention, by rotating the rotating knob, the slider provided in the handle can be displaced in the axial direction of the handle, and the first wire and the second wire can be pulled proximally or pushed distally via the linear member, thereby allowing the tube provided distally of the catheter handle to be operated. At this time, the first wire or the part of the linear member closer to the first end than the abutting part with the reversal guide is fixed to the slider, and when the slider is displaced most proximally, the second connecting part is provided so as to be located proximally of the proximal end of the slider, so that the second connecting part does not come into contact with the slider regardless of the axial displacement of the slider. Therefore, the slider can be displaced smoothly in the axial direction. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 shows an overall view of a catheter with a catheter handle. [Diagram 2] FIG. 2 shows an example of a plan view of the internal structure of a catheter handle provided in the catheter shown in FIG. 1. [Diagram 3] FIG. 3 is a plan view showing the internal structure of the catheter handle shown in FIG. 2, with a slider partially cut away along the axial direction. [Figure 4] FIG. 3 is a plan view of the catheter handle shown in FIG. 2 with the slider displaced to the most proximal position. [Diagram 5] FIG. 3 is a plan view of the catheter handle shown in FIG. 2 with the slider displaced to the most distal side. [Figure 6] FIG. 3 is a plan view of the internal structure of the catheter handle shown in FIG. 2 excluding the slider and shaft. [Figure 7] 2 shows another example of a plan view of the internal structure of the catheter handle provided in the catheter shown in FIG. 1. [Figure 8] FIG. 8 is a plan view showing the internal structure of the catheter handle shown in FIG. 7, with a slider partially cut away along the axial direction. [Figure 9] FIG. 8 is a plan view of the catheter handle shown in FIG. 7 with the slider displaced to the most proximal position. [Figure 10] FIG. 8 is a plan view of the catheter handle shown in FIG. 7 with the slider displaced to the most distal side. [Figure 11] FIG. 10 illustrates a cross-sectional view of the catheter handle shown in FIGS. 2 and 7 along line XI-XI. [Figure 12] 3 illustrates an example of the configuration of a first connection portion and a second connection portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The medical catheter handle of the present invention and a catheter equipped with said handle will be specifically described below based on the following embodiment, but the present invention is not limited to the following embodiment, and can be modified appropriately within the scope of the above and below, and all of these are included in the technical scope of the present invention. In addition, hatching and component symbols may be omitted in each drawing for convenience, but in such cases, the specification and other drawings should be referred to. Furthermore, the dimensions of various components in the drawings may differ from the actual dimensions because priority is given to contributing to understanding the features of the present invention.

[0011] The entirety of a catheter equipped with a medical catheter handle will be described with reference to Figure 1. A catheter 21 according to an embodiment of the present invention has a medical catheter handle 1 (hereinafter sometimes referred to as "handle") and a tube 22 provided on the distal side of the handle 1. The catheter 21 is used for treatment or examination, for example, by inserting the tube 22 into a body cavity such as a patient's blood vessel or digestive tract.

[0012] In the present invention, the proximal side of the catheter refers to the direction toward the user's hand relative to the extending direction of the catheter, and the distal side refers to the opposite side to the proximal side, i.e., the direction toward the treatment target side.

[0013] The tube 22 has a flexible tubular structure, and can be made of synthetic resins such as polyolefin resins (e.g., polyethylene and polypropylene), polyamide resins (e.g., nylon), polyester resins (e.g., PET), aromatic polyetherketone resins (e.g., PEEK), polyetherpolyamide resins, polyurethane resins, polyimide resins, and fluororesins (e.g., PTFE, PFA, and ETFE), or metals such as stainless steel, carbon steel, and nickel-titanium alloys. Metal materials can also be used as metal wires embedded in the synthetic resin tube. The length of the tube 22 in the axial direction (near-far direction) is several times to several tens of times longer than the length of the handle 1 in the same direction, and is, for example, about 500 mm to 1200 mm. The outer diameter of the tube 22 may be, for example, about 0.6 mm to 5 mm.

[0014] The tube 22 has an inner lumen, and may be either a single lumen structure having one lumen inside or a multi-lumen structure having multiple lumen. The tube 22 may have a coaxial structure having multiple coaxial lumens. A wire for operating the tube 22 is disposed in the inner lumen of the tube 22. The wire is provided, for example, to control the bending of the distal end of the tube 22. In this case, it is preferable that the distal end of the wire is fixed to the distal end of the tube 22, for example, the distal 1 / 3 part of the tube 22. A conducting wire, an optical fiber, an endoscope, etc. may be disposed in the inner lumen of the tube 22, and an inner lumen for inserting a guide wire or another treatment tool, or an inner lumen for passing a drug, a contrast agent, or any fluid may be provided.

[0015] The handle 1 is provided on the proximal side of the tube 22, and when assembled into a catheter, the proximal end of a wire disposed in the lumen of the tube 22 is connected to the handle 1.

[0016] The details of the catheter handle will be described with reference to Figs. 2 to 12. Fig. 2 shows an example of a plan view of the internal structure of the catheter handle provided in the catheter shown in Fig. 1, Fig. 3 shows a plan view of the internal structure of the catheter handle shown in Fig. 2 with the slider partially cut away along the axial direction, Figs. 4 and 5 show plan views of the catheter handle shown in Fig. 2 with the slider displaced to the most proximal side or the most distal side, and Fig. 6 shows a plan view of the internal structure of the catheter handle shown in Fig. 2 with the slider and shaft removed. Fig. 7 shows another example of a plan view of the internal structure of the catheter handle provided in the catheter shown in Fig. 1, Fig. 8 shows a plan view of the internal structure of the catheter handle shown in Fig. 7 with the slider partially cut away along the axial direction, and Figs. 9 and 10 show plan views of the catheter handle shown in Fig. 7 with the slider displaced to the most proximal side or the most distal side. Fig. 11 shows a cross-sectional view of the catheter handle shown in Figs. 2 and 7 taken along the line XI-XI, and Fig. 12 shows an example of the configuration of the first connecting part and the second connecting part. 2 to 5 and 7 to 10 show plan views of the catheter handle in which the handle body and the rotating knob, which form the housing of the catheter handle, have been cut away along the axial direction to reveal the internal structure. In Fig. 11, the cut-away portion of the handle body in Fig. 2 and Fig. 7 is shown by dotted lines.

[0017] A handle 1 according to an embodiment of the present invention includes a handle body 2 having an inner cavity extending in an axial direction x, a shaft 3 disposed in the inner cavity of the handle body 2, extending in the axial direction x, and fixed to the handle body 2, a slider 4 disposed in the inner cavity of the handle body 2 and outside the shaft 3, having a first engagement portion 16 extending in a spiral shape on its outer surface, and provided displaceable in the axial direction x along the shaft 3, and a rotating knob 5 having a rotation axis extending in the axial direction x, provided rotatably relative to the handle body 2, and having a second engagement portion 17 on its inner surface that engages with the first engagement portion 16 of the slider 4. In the handle 1, the axial direction x corresponds to the direction in which the rotation axis of the rotating knob 5 extends, and a proximal side and a distal side are defined as one side and the other side relative to the axial direction x. In addition, a radial direction is defined as a direction perpendicular to the axial direction x.

[0018] The handle body 2 has an inner cavity extending in the axial direction x (see FIG. 6). The inner cavity of the handle body 2 preferably has a cylindrical portion centered in the axial direction x, and the rotation knob 5 is preferably disposed in the cylindrical portion of the inner cavity. The rotation knob 5 has a rotation axis extending in the axial direction x, and is provided rotatably about the axial direction x relative to the handle body 2. The rotation knob 5 is preferably disposed in at least a portion of the inner cavity of the handle body 2, and it is preferable that only a portion of the rotation knob 5 in the axial direction x is disposed in the inner cavity of the handle body 2.

[0019] The rotation knob 5 has an inner cavity extending in the axial direction x. The inner cavity of the rotation knob 5, together with the inner cavity of the handle body 2, preferably forms the internal space of the handle 1. The inner cavity of the rotation knob 5 preferably has a portion formed in a cylindrical shape centered in the axial direction x. It is preferable that the inner cavity of the rotation knob 5 communicates with the inner cavity of the handle body 2 in the axial direction x, the inner cavity of the rotation knob 5 and the inner cavity of the handle body 2 integrally form the internal space of the handle 1, and the shaft 3 and the slider 4 are disposed in this internal space.

[0020] At least one of the distal side and the proximal side of the handle body 2 is preferably open, and the rotating knob 5 is inserted from the distal side or the proximal side of the open-formed handle body 2, and the rotating knob 5 is preferably disposed in the inner cavity of the handle body 2. On the other hand, the rotating knob 5 is preferably inserted into the handle body 2 and the proximal side or the distal side located in the inner cavity of the handle body 2 is preferably formed open. As a result, the inner cavity of the handle body 2 and the inner cavity of the rotating knob 5 form the inner space of the handle 1 integrally. In the handle 1 shown in the drawings, the distal side of the handle body 2 is formed open, the proximal side of the rotating knob 5 is formed open, and the rotating knob 5 is inserted into the inner cavity of the handle body 2 from the distal side of the handle body 2. In the handle 1, the handle body 2 and the rotating knob 5 are exposed to the outside, and the handle 1 can be operated, for example, by holding the handle body 2 with one hand and holding the rotating knob 5 with the other hand and rotating it relative to the handle body 2.

[0021] A shaft 3 is disposed in the inner cavity of the handle body 2 so as to extend in the axial direction x (see FIG. 3 ). The shaft 3 is fixed to the handle body 2 so as not to rotate or move relative to the handle body 2. The shaft 3 may be formed integrally with the handle body 2. The shaft 3 is preferably disposed at a position that serves as the rotation axis of the rotation knob 5. The shaft 3 is preferably disposed from the inner cavity of the handle body 2 to the inner cavity of the rotation knob 5, and may be disposed so as to extend distally and / or proximally beyond the handle body 2 and the rotation knob 5.

[0022] A tube 22 is preferably connected to the distal side of the shaft 3. The connection portion between the shaft 3 and the tube 22 may be in the internal space of the handle 1, may be distal to the internal space of the handle 1, or may be outside the handle 1. The shaft 3 and the tube 22 may also be formed integrally.

[0023] The shaft 3 may be formed in a solid shape or may be formed in a hollow shape. It is preferable that the shaft 3 is formed in a hollow shape, and the inner cavity of the shaft 3 communicates with the inner cavity of the tube 22. This allows a treatment tool to be delivered to a treatment target part from the proximal side of the catheter 21 through the inner cavity of the shaft 3 and the inner cavity of the tube 22, or a drug or a contrast agent to be injected. Examples of treatment tools include an electrode catheter, an ablation catheter, a mapping catheter, a balloon catheter, a microcatheter, forceps, a laser probe, a fiberscope, a high-frequency treatment tool, an electric hydraulic impact crushing probe, and the like. In order to enable the insertion of such a treatment tool, it is preferable that the shaft 3 has a proximal opening on the outside of the handle 1. The shaft 3 may have a branched portion, and a switching cock may be provided at the branched portion of the shaft 3. This allows, for example, an insertion port for a treatment tool and an injection port for a drug or the like to be provided separately.

[0024] A slider 4 is disposed on the outside of the shaft 3. The slider 4 is disposed in the internal space of the handle 1, and is disposed from the inner cavity of the handle body 2 to the inner cavity of the rotation knob 5 (see Figs. 2 and 3). The slider 4 is disposed radially outward from the shaft 3, and therefore, it is preferable that the slider 4 is provided with a through hole that extends in the axial direction x and passes through the slider 4 in the axial direction x, and the shaft 3 is inserted through this through hole.

[0025] The slider 4 is provided so as to be displaceable in the axial direction x along the shaft 3, that is, so as to be movable in the axial direction x within the internal space of the handle 1. The slider 4 is preferably formed so that the length in the axial direction x is shorter than the length in the axial direction x of the shaft 3 in the internal space of the handle 1, and is also preferably formed so as to be shorter than the length in the axial direction x of the internal space of the handle 1.

[0026] The slider 4 is formed so as to be displaced in the axial direction x by rotating the rotating knob 5 about the axial direction x. To this end, a first engagement portion 16 extending in a spiral shape is formed on the outer surface of the slider 4, and a second engagement portion 17 engaging with the first engagement portion 16 is formed on the inner surface of the rotating knob 5.

[0027] The first engagement portion 16 is formed on the outer surface of the slider 4, i.e., on the surface on the radially outer side of the slider 4, so as to extend in a spiral shape. In detail, the first engagement portion 16 is formed on the outer surface of the slider 4 so as to extend in a spiral shape with the axial direction x of the handle 1 as an axis, and is preferably formed on the outer surface of the slider 4 formed in a cylindrical shape. The first engagement portion 16 may be formed continuously or intermittently. The first engagement portion 16 may be formed in a right-handed spiral shape or a left-handed spiral shape from the proximal side to the distal side.

[0028] The second engagement portion 17 is formed on the inner surface of the rotation knob 5, i.e., on the radially inner surface of the rotation knob 5, so as to be able to engage with the first engagement portion 16 (see Figs. 3, 6 and 8). The second engagement portion 17 is formed so as to extend spirally on the inner surface of the rotation knob 5, and more specifically, is formed so as to extend spirally with the axial direction x of the handle 1 as its axis. The second engagement portion 17 is preferably formed on the inner surface of the rotation knob 5 which is formed in a cylindrical shape. The second engagement portion 17 may be formed continuously or discontinuously.

[0029] As described above, the first engagement portion 16 is formed on the outer surface of the slider 4, and the second engagement portion 17 is formed on the inner surface of the rotating knob 5, so that by rotating the rotating knob 5 about the axial direction x, the slider 4 can be moved in the axial direction x in the internal space of the handle 1. In other words, the first engagement portion 16 and the second engagement portion 17 formed in a spiral shape can convert the rotational movement of the rotating knob 5 about the axial direction x into a translational movement of the slider 4 in the axial direction x.

[0030] The first engagement portion 16 and the second engagement portion 17 may be formed so as to extend continuously or intermittently in a spiral shape for one or more revolutions, or may be formed so as to extend less than one revolution. At least one of the first engagement portion 16 and the second engagement portion 17 is preferably formed so as to extend continuously or intermittently in a spiral shape for one or more revolutions, more preferably formed so as to extend two or more revolutions, and even more preferably formed so as to extend three or more revolutions. On the other hand, the other of the first engagement portion 16 and the second engagement portion 17 may be formed so as to extend continuously or intermittently in a spiral shape for less than one revolution, for example, may be provided so as to extend only half a revolution in a spiral shape. In the handle 1 shown in the drawings, the first engagement portion 16 provided on the slider 4 is formed so as to extend in a spiral shape for one or more revolutions, and the second engagement portion 17 provided on the rotating knob 5 is formed so as to extend in a spiral shape for less than one revolution.

[0031] The first engaging portion 16 and the second engaging portion 17 can be formed by a combination of a convex portion and a groove. That is, it is preferable that one of the first engaging portion 16 and the second engaging portion 17 is a convex portion and the other is a groove. When the first engaging portion 16 or the second engaging portion 17 is formed as a groove, it is preferable that the groove is formed so as to extend continuously in a spiral shape. The groove may be a bottomed groove or a through groove, but it is preferable that the groove is a bottomed groove in terms of ensuring the strength of the slider 4 or the rotating knob 5. On the other hand, when the first engaging portion 16 or the second engaging portion 17 is formed as a convex portion, the convex portion may be provided in a continuously extending spiral shape or in an intermittently extending spiral shape. In the drawings, the first engaging portion 16 provided on the slider 4 is formed as a convex portion (convex stripe), and the second engaging portion 17 provided on the rotating knob 5 is formed as a groove.

[0032] The first wire 6 and the second wire 7 are disposed from the internal space of the handle 1 to the lumen of the tube 22. The distal portion of each of the first wire 6 and the second wire 7 is disposed in the lumen of the tube 22, and the proximal portion is disposed in the internal space of the handle 1. The distal portion and the proximal portion of the first wire 6 can be defined as, for example, the distal half portion and the proximal half portion of the first wire 6, respectively. The distal portion and the proximal portion of the second wire 7 can be defined as, for example, the distal half portion and the proximal half portion of the second wire 7, respectively. The distal end of the first wire 6 is preferably fixed to the distal end of the tube 22, and the distal end of the second wire 7 is preferably fixed to the distal end of the tube 22. In this case, the distal end of the tube 22 can be bent to one side by operating the handle 1 to pull the first wire 6 proximally, and the distal end of the tube 22 can be bent to the other side by operating the handle 1 to pull the second wire 7 proximally. The distal end of the first wire 6 can be defined, for example, as a portion within 100 mm on the proximal side of the distal end of the first wire 6, and the distal end of the second wire 7 can be defined, for example, as a portion within 100 mm on the proximal side of the distal end of the second wire 7. The distal end of the tube 22 can be defined, for example, as a portion within 100 mm on the proximal side of the distal end of the tube 22.

[0033] The proximal portion of the first wire 6 and the proximal portion of the second wire 7 preferably extend from the inner cavity of the shaft 3 or the tube 22 to the outside thereof in the inner cavity of the rotating knob 5. In addition, when the slider 4 is displaced to the most distal side, the proximal portion of the first wire 6 and the proximal portion of the second wire 7 preferably extend from the inner cavity of the shaft 3 or the tube 22 to the outside thereof distal to the distal end of the slider 4.

[0034] In the internal space of the handle 1, a linear member 8 is provided, which is bent on the proximal side and has both ends extending toward the distal side (see Figs. 3 and 8). The linear member 8 has one end and the other end in the extending direction of the linear member 8, and the portion including the one end is defined as the first end, and the portion including the other end is defined as the second end. The linear member 8 is disposed at least in the inner cavity of the handle main body 2, and the first end is connected to the proximal portion of the first wire 6 at the first connecting portion 9, and the second end is connected to the proximal portion of the second wire 7 at the second connecting portion 10. In other words, the linear member 8 may be disposed so as to extend from the inner cavity of the handle main body 2 to the inner cavity of the rotating knob 5, with the portion of the linear member 8 connected to the first wire 6 at the first connecting portion 9 being the first end, and the portion of the linear member 8 connected to the second wire 7 at the second connecting portion 10 being the second end. An intermediate portion between the first end and the second end of the linear member 8 is disposed in the inner cavity of the handle body 2 so as to be bent toward the proximal side.

[0035] At the first connecting portion 9 and the second connecting portion 10, the linear member 8 can be connected to the first wire 6 and the second wire 7 by known joining means such as adhesion, welding, crimping, or tying.

[0036] An inversion guide 14 for guiding bending of the linear member 8 at its intermediate portion is provided in the inner cavity of the handle body 2, and at least a portion of the intermediate portion of the linear member 8 abuts against the inversion guide 14. The inversion guide 14 is fixed to the handle body 2 and is provided so as not to rotate or move relative to the handle body 2 when the handle 1 is operated. The inversion guide 14 may be formed integrally with the handle body 2. Alternatively, the inversion guide 14 may be fixable to the handle body 2 at different positions in the axial direction x. In Figs. 2 to 10, the inversion guide 14 is fixed to the handle body 2 by screws.

[0037] The reversal guide 14 is preferably provided at a position overlapping with the slider 4 in the axial direction x, or provided on the proximal side of the slider 4. More preferably, the reversal guide 14 is provided on the proximal side of the slider 4 when the slider 4 is displaced to the most proximal side.

[0038] The reversal guide 14 is provided with a guide passage that causes the linear member 8 to make a U-turn to the distal side, and the linear member 8 abuts against the guide passage. The guide passage is preferably formed in a U-shape or an arc shape (e.g., semicircular shape) that is convex on the proximal side when viewed in a plan view along the axial direction x. The guide passage is preferably formed as a tubular passage, and the middle portion of the linear member 8 is preferably inserted into the lumen of the tubular passage.

[0039] The linear member 8 is displaceable in the axial direction x in the internal space of the handle 1, with a portion on the first end side from the reversal guide 14 and a portion on the second end side from the reversal guide 14 working together. The portion of the linear member 8 on the first end side from the reversal guide 14 is connected to the portion on the second end side from the reversal guide 14 via the abutting portion with the reversal guide 14, so that when the portion on the first end side from the reversal guide 14 is displaced proximally, the portion on the second end side from the reversal guide 14 can be displaced distally, and when the portion on the first end side from the reversal guide 14 is displaced distally, the portion on the second end side from the reversal guide 14 can be displaced proximally.

[0040] The first wire 6 or the portion of the linear member 8 on the first end side from the abutting portion with the reversing guide 14 is fixed to the slider 4. In FIG. 3, the first wire 6 is fixed to the slider 4 by a fixture 15 provided on the slider 4, and in FIG. 8, the linear member 8 is fixed to the slider 4 by a fixture 15 provided on the slider 4. With this, when the rotating knob 5 is rotated about the axial direction x, the slider 4 is displaced in the axial direction x, and accordingly, the portion of the linear member 8 on the first end side from the reversing guide 14 can be displaced in the axial direction x, and the portion of the linear member 8 on the second end side from the reversing guide 14 can be displaced in the opposite axial direction x. Specifically, when the slider 4 is displaced proximally, accordingly, the portion of the linear member 8 on the first end side from the reversing guide 14 is displaced proximally, and the portion of the linear member 8 on the second end side from the reversing guide 14 is displaced distally. When the slider 4 is displaced distally, the portion of the linear member 8 on the first end side from the reversing guide 14 is displaced distally accordingly, and the portion of the linear member 8 on the second end side from the reversing guide 14 is displaced proximally. This allows the first wire 6 and the second wire 7 arranged in the lumen of the tube 22 to be pulled proximally or pushed distally, for example, to control the bending of the distal end of the tube 22. For example, by rotating the rotating knob 5 clockwise as viewed from the hand side, the distal end of the tube 22 can be bent to one side, and by rotating the rotating knob 5 counterclockwise as viewed from the hand side, the distal end of the tube 22 can be bent to the other side.

[0041] A first connection portion 9 between the first wire 6 and the linear member 8 and a second connection portion 10 between the second wire 7 and the linear member 8 are located in the internal space of the handle 1 regardless of displacement of the slider 4 in the axial direction x. It is preferable that the linear member 8 abuts against the reversing guide 8 regardless of displacement of the slider 4 in the axial direction x, and it is preferable that the first wire 6 and the second wire 7 do not abut against the reversing guide 8 when the slider 4 is displaced in the axial direction x, and it is more preferable that the first connection portion 9 and the second connection portion 10 do not abut against the reversing guide 8.

[0042] The first wire 6 or linear member 8 is preferably fixed to the inner surface of the slider 4. In Fig. 3 and Fig. 8, a fixing device 15 is provided on the inner surface of the slider 4, and the first wire 6 or linear member 8 is fixed to the fixing device 15, but the first wire 6 or linear member 8 may be directly fixed to the inner surface of the slider 4 with an adhesive or the like. When the first wire 6 or linear member 8 is directly fixed to the inner surface of the slider 4, the fixing device 15 may not be necessary. Methods for fixing the first wire 6 or linear member 8 to the fixing device 15 or the inner surface of the slider 4 include adhesion with an adhesive, welding, fitting, crimping, tying, screwing, and the like.

[0043] Although not shown in the drawings, the slider 4 may have an inner layer and an outer layer, and the first wire 6 or the linear member 8 may be disposed between the inner layer and the outer layer. In this case, the first wire 6 or the linear member 8 is fixed to the slider 4 by being sandwiched between the inner layer and the outer layer.

[0044] In the handle 1 configured as described above, when the slider 4 is displaced in the axial direction x, the relative position between the slider 4 and the second connection part 10 changes. Specifically, when the slider 4 is displaced proximally, the second connection part 10 moves distally, and when the slider 4 is displaced distally, the second connection part 10 moves proximally. On the other hand, the relative position between the slider 4 and the first connection part 9 does not change regardless of the displacement of the slider 4 in the axial direction x unless the first wire 6 and the linear member 8 are bent. That is, when the slider 4 is displaced proximally, the first connection part 9 also moves proximally, and when the slider 4 is displaced distally, the first connection part 9 also moves distally. In the handle 1 configured as described above, it is preferable that the slider 4 and the second connection part 10 do not come into contact with each other regardless of the displacement of the slider 4 in the axial direction x, and this allows the slider 4 to be smoothly displaced in the axial direction x. Therefore, the handle 1 is configured such that, when the slider 4 is displaced most proximally, the second connection part 10 is located more proximal than the proximal end of the slider 4. Specifically, the handle 1 is configured such that, when the slider 4 is displaced most proximally and the first wire 6, the second wire 7, and the linear member 8 are not bent in the internal space of the handle 1, the second connection part 10 is located more proximal than the proximal end of the slider 4.

[0045] 2 to 5 show the internal structure of the handle 1 according to the first embodiment, and Fig. 7 to 10 show the internal structure of the handle 1 according to the second embodiment. The handle 1 shown in Fig. 2 to 5 and the handle 1 shown in Fig. 7 to 10 have a different installation position of the first connection part 9, with the first connection part 9 being located proximally relative to the slider 4 in Fig. 2 to 5 and the first connection part 9 being located distally relative to the slider 4 in Fig. 7 to 10. Fig. 4 and Fig. 9 show the handle 1 in a state where the slider 4 is displaced to the most proximal side, Fig. 5 and Fig. 10 show the handle 1 in a state where the slider 4 is displaced to the most distal side, and Fig. 2 to Fig. 3 and Fig. 7 to Fig. 8 show the handle 1 in a state where the slider 4 is located approximately in the middle in the axial direction x.

[0046] If the second connection part 10 is located proximal to the proximal end of the slider 4 when the slider 4 is displaced to the most proximal side, the second connection part 10 will be located proximal to the slider 4 regardless of the displacement of the slider 4 in the axial direction x. Therefore, when the slider 4 is displaced in the axial direction x when operating the handle 1, the slider 4 does not come into contact with the second connection part 10, and the slider 4 can be smoothly displaced in the axial direction x. Even if the linear member 8 does not bend when the slider 4 is moved from the distal side to the proximal side, the second connection part 10 will always be located proximal to the slider 4. On the other hand, when the slider 4 is moved from the proximal side to the distal side, the linear member 8 is pulled by the slider 4, and the linear member 8 does not basically bend on the proximal side of the slider 4. Therefore, in this case as well, the second connection part 10 will always be located proximal to the slider 4.

[0047] The first connection part 9 may be located proximally relative to the slider 4 as shown in Figures 2 to 5, or may be located distally relative to the slider 4 as shown in Figures 7 to 10. Although not shown in the drawings, the first connection part 9 may be located at a position overlapping with the slider 4 in the axial direction x, or the first connection part 9 may be fixed to the inner surface of the slider 4 (for example, the fixing part 15).

[0048] When the first connection part 9 is located proximal to the slider 4 as shown in FIG. 2 to FIG. 5, it is preferable that the first connection part 9 is located proximal to the proximal end of the slider 4 when the first wire 6 is fixed to the slider 4 and the slider 4 is displaced to the most proximal side. If the handle 1 is configured in this way, the slider 4 is prevented from contacting the first connection part 9 as well as the second connection part 10 when the slider 4 is displaced in the axial direction x. Therefore, the slider 4 can be smoothly displaced in the axial direction x. In particular, when the first wire 6 is made of a metal wire, the first wire 6 is unlikely to bend when the slider 4 is displaced in the axial direction x, and the contact of the slider 4 with the first connection part 9 is effectively prevented.

[0049] On the other hand, as shown in FIG. 8, the linear member 8 may be fixed to the slider 4. In this case, a portion of the linear member 8 on the first end side from the abutting portion with the reversing guide 14 is fixed to the slider 4. If the linear member 8 is fixed to the slider 4, the force of displacement of the slider 4 in the axial direction x is directly transmitted to the linear member 8, and the linear member 8 is easily pushed and moved. That is, when the slider 4 is moved from the distal side to the proximal side, the portion of the linear member 8 on the first end side from the reversing guide 14 is easily displaced to the proximal side, and further, the portion of the linear member 8 on the second end side from the reversing guide 14 is easily displaced to the distal side. In addition, when the linear member 8 is made of a fiber material (for example, a fiber rope) as described later, it becomes easy to fix the linear member 8 to the slider 4, for example, to the fixing tool 15, and the linear member 8 can be stably fixed to the slider 4.

[0050] When the linear member 8 is fixed to the slider 4, the first connection part 9 is preferably located distal to the distal end of the slider 4 as shown in Figures 7 to 10. This makes it difficult for the first connection part 9 to get caught on the slider 4, allowing the slider 4 to be smoothly displaced in the axial direction x. On the other hand, when the first connection part 9 does not particularly get in the way, the first connection part 9 may be located at a position overlapping with the slider 4 in the axial direction x.

[0051] The first wire 6, the second wire 7, and the linear member 8 are preferably disposed in the inner cavity of the slider 4, i.e., in a through hole extending in the axial direction x, at a portion overlapping with the slider 4 in the axial direction x. Therefore, it is preferable that a gap extending in the axial direction x (a gap penetrating the slider 4 in the axial direction x) is formed between the inner surface of the through hole of the slider 4 and the shaft 3, and the first wire 6, the second wire 7, or the linear member 8 is disposed in the gap. Note that the second wire 7 is not fixed to the slider 4, and a portion of the linear member 8 on the second end side from the portion where it abuts against the reversal guide 14 is also not fixed to the slider 4.

[0052] When the slider 4 is displaced to the most proximal side, at least a part of the second connection part 10 may be located proximal to the proximal end of the slider 4, but it is preferable that the entire second connection part 10 is located proximal to the proximal end of the slider 4. When the first connection part 9 is located proximal to the proximal end of the slider 4, at least a part of the first connection part 9 may be located proximal to the proximal end of the slider 4, but it is preferable that the entire first connection part 9 is located proximal to the proximal end of the slider 4. When the first connection part 9 is located distal to the distal end of the slider 4, at least a part of the first connection part 9 may be located distal to the distal end of the slider 4, but it is preferable that the entire first connection part 9 is located distal to the distal end of the slider 4.

[0053] The first wire 6, the second wire 7, and the linear member 8 may be made of metal wires such as stainless steel, carbon steel, or nickel-titanium alloy, or resin wires (i.e., fiber materials) made of synthetic resins such as polyamide resins (e.g., nylon), polyolefin resins (e.g., polyethylene or polypropylene), polyester resins (e.g., PET), aromatic polyether ketone resins (e.g., PEEK), polyimide resins, aromatic polyamide resins (e.g., aramid), or fluororesins (e.g., PTFE, PFA, FEP, ETFE). These metal wires and resin wires may have a monofilament structure or a multifilament structure. The first wire 6, the second wire 7, and the linear member 8 may be covered by a cylinder made of a coil-shaped metal or synthetic resin.

[0054] The first wire 6, the second wire 7, and the linear member 8 may be made of the same material or different materials. The linear member 8 is preferably made of a material different from the first wire 6 and the second wire 7. The linear member 8 is preferably made of a material that is easy to bend so that it can be bent with a relatively small bending radius by the inversion guide 14. On the other hand, the first wire 6 and the second wire 7 are preferably made of a material with a relatively high rigidity because they are arranged in the lumen of the tube 22 and the movement of the linear member 8 in the axial direction x in the handle 1 is required to be suitably transmitted to the distal end of the tube 22 via the first wire 6 and the second wire 7, and therefore, the first wire 6 and the second wire 7 are preferably made of a material with a relatively high rigidity, and are not required to be more flexible than the linear member 8. Therefore, the linear member 8 preferably has a bending rigidity smaller than that of the first wire 6 and the second wire 7.

[0055] The bending rigidity of the linear member 8, the first wire 6, and the second wire 7 can be measured, for example, according to the bending resistance test of JIS L 1913: 2010, and the magnitude of bending rigidity can be compared from the results. Alternatively, the bending rigidity can be measured using a bending tester such as a single wire bending tester KES-FB2-SH or a pure bending tester KES-FB2-S manufactured by Kato Tech Co., Ltd., and the magnitude of bending rigidity can be compared.

[0056] It is preferable to use a fiber rope as the linear member 8. This makes it easier to bend the linear member 8 smoothly in the reversing guide 14 while ensuring the strength of the linear member 8. The fiber rope is formed by twisting yarns together to form strands, which are then further twisted together. Therefore, large irregularities are formed on the surface of the fiber rope due to the twisting, which reduces the contact area with the reversing guide 14 and improves the sliding properties in the reversing guide 14. In addition, it is easier to ensure the rigidity of the linear member 8 in the axial direction x, and it is possible to suppress bending of the linear member 8 between the first end and the reversing guide 14 and between the second end and the reversing guide 14.

[0057] The fiber rope is preferably made of a high-strength fiber material to prevent breakage, and is preferably made of so-called super fibers. Examples of super fibers include aramid fibers, ultra-high molecular weight polyethylene fibers, polyarylate fibers, ultra-high strength polyvinyl alcohol fibers, polyparaphenylene benzobisoxazole (PBO) fibers, and polyphenylene sulfide (PPS) fibers. The super fibers preferably have a tensile strength of 1 GPa or more, preferably 2 GPa or more, and an elastic modulus of 25 GPa or more, preferably 50 GPa or more.

[0058] The first wire 6 and the second wire 7 are preferably made of metal wires. This makes it easy to responsively control the bending of the distal end of the tube 22 by pulling the first wire 6 and the second wire 7 arranged in the lumen of the tube 22 proximally or pushing them distally. The first wire 6 and the second wire 7 may be wire ropes made of a metal material.

[0059] The outer diameters of the linear member 8, the first wire 6, and the second wire 7 can be, for example, about 100 μm to 1500 μm. Note that the outer diameter described here means the diameter when the cross-sectional shape is circular, and means the average value of the major axis and minor axis when the cross-sectional shape is non-circular. The major axis means the length in the major axis direction of the outer edge of the cross-sectional shape (the maximum diameter of the outer edge), and the minor axis means the longest length among the lengths in the minor axis direction perpendicular to the major axis direction.

[0060] The outer diameter of the linear member 8 is preferably larger than the outer diameter of the first wire 6 and the outer diameter of the second wire 7. By forming the outer diameter of the linear member 8 to be somewhat larger, when the slider 4 is displaced in the axial direction x and the linear member 8 is displaced in the axial direction x in the internal space of the handle 1, the linear member 8 is less likely to bend or get caught inside the handle 1.

[0061] The first connecting part 9 and the second connecting part 10 can be formed by adhesion, welding, crimping, knotting, etc., but as shown in FIG. 12, the proximal end of the first wire 6 may have a first annular part 11 formed in a ring shape, and the first end of the linear member 8 may be tied to the first annular part 11 to form the first connecting part 9, or the proximal end of the second wire 7 may have a second annular part 12 formed in a ring shape, and the second end of the linear member 8 may be tied to the second annular part 12 to form the second connecting part 10. In this way, the first connecting part 9 and the second connecting part 10 are formed as a knot 13 of the linear member 8, and the knot 13 can play a role as a cushion. As a result, even if the first connecting part 9 and the second connecting part 10 come into contact with other members inside the handle 1, abnormal noise is unlikely to occur.

[0062] The first annular portion 11 is preferably formed by forming the proximal end of the first wire 6 into a ring shape. The second annular portion 12 is preferably formed by forming the proximal end of the second wire 7 into a ring shape. As shown in FIG. 12, the first annular portion 11 can be formed by bending the proximal end of the first wire 6 into a ring shape and joining the first wires 6 together, and the second annular portion 12 can be formed by bending the proximal end of the second wire 7 into a ring shape and joining the second wires 7 together. By forming the first annular portion 11 and the second annular portion 12 in this manner, the first annular portion 11 is formed integrally with the first wire 6, and the second annular portion 12 is formed integrally with the second wire 7, and the first annular portion 11 and the second annular portion 12 can be formed simply and firmly.

[0063] The first wires 6 and the second wires 7 can be joined together by known joining means such as adhesion, welding, soldering, crimping, knotting, etc. Among these, joining by soldering, crimping, or a combination of these is preferable because it can firmly join the first wires 6 and the second wires 7. The first annular portion 11 and the second annular portion 12 may be formed by attaching an annular member to the proximal end of the first wire 6 or the proximal end of the second wire 7.

[0064] When tying the linear member 8 to the first annular portion 11 or the second annular portion 12, various knotting methods can be adopted, and the type is not particularly limited. Types of knotting include a single knot, a double knot, a bowline knot, a wrap knot, a figure-of-eight knot, an S-shaped knot, a hand knot, a vertical knot, a slip knot, and the like.

[0065] The knot 13 formed by tying the first end of the linear member 8 to the first annular portion 11 is preferably fixed with an adhesive or melted and solidified. The knot 13 formed by tying the second end of the linear member 8 to the second annular portion 12 is preferably fixed with an adhesive or melted and solidified. This makes the knot 13 of the linear member 8 at the first connection portion 9 and the knot 13 of the linear member 8 at the second connection portion 10 less likely to come undone, and the linear member 8 can be firmly tied to the first wire 6 and the second wire 7.

[0066] It is more preferable that the knot 13 is fixed by an adhesive. That is, it is preferable that an adhesive is applied to the knot 13 and the knot 13 is fixed by hardening the adhesive. This makes it easy to fix the knot 13 of the linear member 8 regardless of the material of which the linear member 8 is made.

[0067] In the handle 1, even if the linear member 8 or the second wire 7 is bent when the slider 4 is displaced proximally, the distal end of the tube 22 is bent to one side, and the second wire 7 is pulled to the distal side, so that the bending of the linear member 8 or the second wire 7 can be eliminated. That is, when the slider 4 is displaced proximally, the first wire 6 is pulled to the proximal side, and the distal end of the tube 22 is bent to one side, and the second wire 7 is drawn into the lumen of the tube 22 and pulled to the distal side. As a result, even if the linear member 8 or the second wire 7 is bent, the bending is eliminated. Similarly, even if the linear member 8 or the first wire 6 is bent when the slider 4 is displaced distally, the distal end of the tube 22 is bent to the other side, and the first wire 6 is pulled to the distal side, so that the bending of the linear member 8 or the first wire 6 can be eliminated. That is, when the slider 4 is displaced distally, the second wire 7 is pulled proximally, which bends the distal end of the tube 22 to the other side, and accordingly the first wire 6 is drawn into the lumen of the tube 22 and pulled distally. As a result, even if bending occurs in the linear member 8 or the first wire 6, the bending is eliminated.

[0068] In order to prevent the slider 4 from rotating together with the rotary knob 5 when the rotary knob 5 is rotated about the axial direction x, the handle 1 is preferably configured as follows. That is, it is preferable that a third engagement portion 18 is provided on the outer surface of the slider 4, a fourth engagement portion 19 that engages with the third engagement portion 18 is provided on the inner surface of the handle body 2, and at least one of the third engagement portion 18 and the fourth engagement portion 19 is formed to extend in the axial direction x. This allows the slider 4 to be displaced along the axial direction x without rotating about the axial direction x.

[0069] The third engagement portion 18 and the fourth engagement portion 19 can be formed by a combination of a convex portion and a groove. That is, it is preferable that one of the third engagement portion 18 and the fourth engagement portion 19 is a convex portion and the other is a groove. In the handle 1 shown in the drawings, the third engagement portion 18 provided on the outer surface of the slider 4 is formed as a convex portion, and the fourth engagement portion 19 provided on the inner surface of the handle body 2 is formed as a groove.

[0070] The third engagement portion 18 or the fourth engagement portion 19 formed as a groove is preferably formed so as to extend in the axial direction x, and more preferably formed so as to extend continuously in the axial direction x. The groove may be a bottomed groove or a through groove, but in terms of ensuring the strength of the slider 4 or the handle body 2, it is preferable that the groove is a bottomed groove. On the other hand, the third engagement portion 18 or the fourth engagement portion 19 formed as a convex portion may or may not be formed so as to extend in the axial direction x.

[0071] As shown in the drawings, when the third engagement portion 18 is formed as a convex portion and the fourth engagement portion 19 is formed as a groove, the convex portion formed as the third engagement portion 18 on the outer surface of the slider 4 is preferably disposed on the proximal side of the slider 4 relative to the first engagement portion 16. At least a part of the groove formed as the fourth engagement portion 19 on the inner surface of the handle body 2 is preferably disposed on the distal side of the reversal guide 14.

[0072] Although not shown in the drawings, when a groove is formed on the outer surface of the slider 4 as the third engagement portion 18, the groove may be formed on the slider 4 at a position overlapping with the first engagement portion 16 in the axial direction x, or may be formed on the proximal side of the first engagement portion 16. In this case, it is preferable that at least a part of the convex portion formed on the inner surface of the handle body 2 as the fourth engagement portion 19 is disposed distal to the reversal guide 14.

[0073] The catheter handle of the present invention has been described above, but the catheter handle of the present invention is not limited to one that controls the bending of the distal end of the tube, as long as it displaces the first wire and the second wire distally or proximally in the lumen of the tube. For example, the catheter handle may be one that allows the first wire and / or the second wire to be inserted and removed from the distal end of the tube by operating the catheter handle. Alternatively, the catheter handle may be one in which a treatment tool such as a knife or a snare is attached to the distal end of the first wire or the distal end of the second wire, and the treatment tool attached to the distal end of the first wire or the distal end of the second wire can be inserted and removed from the distal end of the tube by operating the catheter handle. [Explanation of symbols]

[0074] 1: Catheter handle 2: Handle body 3: Shaft 4: Slider 5: Rotary knob 6: First wire 7: Second wire 8: Linear member 9: First connection part 10: Second connection part 11: First annular section 12: Second annular section 13: Knot 14: Inversion guide 15: Fixtures 16: First engagement part 17: Second engagement portion 18: Third engagement part 19: Fourth engagement part 21: Catheter 22: Tube

Claims

1. A handle for manipulating a catheter tube, a handle body having an inner lumen extending axially from a proximal side to a distal side; a shaft disposed in a lumen of the handle body, extending in the axial direction, and fixed to the handle body; a slider disposed on the outside of the shaft, the slider having a first engagement portion extending in a spiral shape on an outer surface thereof, and the slider being provided so as to be displaceable in the axial direction along the shaft; a rotary knob having a rotary shaft extending in the axial direction and rotatably provided with respect to the handle body, the rotary knob having an inner cavity extending in the axial direction and a second engagement portion on an inner surface thereof that engages with the first engagement portion of the slider; a first wire having a distal portion disposed within the lumen of the tube and a proximal portion disposed within the lumen of the rotatable knob; a second wire having a distal portion disposed within the lumen of the tube and a proximal portion disposed within the lumen of the rotatable knob; a linear member disposed in an inner cavity of the handle body, the linear member having a first end on one end side and a second end on the other end side, the first end being connected to a proximal portion of the first wire at a first connecting portion, and the second end being connected to a proximal portion of the second wire at a second connecting portion; a reversal guide disposed in an inner cavity of the handle body and in contact with a portion of the linear member; the first wire or a portion of the linear member closer to the first end than a portion of the linear member that abuts against the reversing guide is fixed to the slider, A medical catheter handle in which, when the slider is displaced most proximally, the second connection portion is located proximal to the proximal end of the slider.

2. The medical catheter handle according to claim 1 , wherein the linear member has a bending stiffness smaller than that of the first wire and the second wire.

3. 2. The medical catheter handle according to claim 1, wherein the first wire and the second wire are metal wires, and the linear member is a fiber rope.

4. The first wire is fixed to the slider, 2. The medical catheter handle according to claim 1, wherein the first connection portion is located proximally of the proximal end of the slider when the slider is displaced most proximally.

5. 2. The medical catheter handle according to claim 1, wherein a portion of the linear member closer to the first end than a portion of the linear member that abuts against the reversal guide is fixed to the slider.

6. 2. The medical catheter handle according to claim 1, wherein one of the first engaging portion and the second engaging portion is a convex portion and the other is a groove.

7. A medical catheter handle according to any one of claims 1 to 6, and a tube disposed distal to the medical catheter handle.

Images