WO2018110561A1 - Medical device - Google Patents

Abstract

A medical device (1A) is provided with: a cylindrical guiding member (2); a linear member (3) that is inserted through the interior of the guiding member (2); a coupling member (4) provided to a distal end side of the guiding member (2), the coupling member (4) including a first through hole (41E) having a first opening (411) through which a part of the linear member (3) is inserted and from which a distal end side of the linear member (3) protrudes out, and a clamping section (41F) for supporting an distal end-side end section of the linear member (3) so as to allow for detachment, the clamping section (41F) being able to switch, in response to movement of the linear member (3) to a proximal end side, from a support state where the distal end-side end section of the linear member (3) is supported to a detachment state where the distal end-side end section of the linear member (3) is detached; and an indwelling member (9) having an annular section (93) through which a protruding section (3A) of the linear member (3) that protrudes out from the first opening (411) is inserted. The indwelling member (9) couples to the coupling member (4) in the support state and detaches from the coupling member (4) in the detachment state.

Description

Medical equipment

The present invention relates to a medical device for indwelling an indwelling member such as a coil at an aneurysm occurrence site or the like.

As a method for treating an aneurysm or the like, a vascular embolization method in which an indwelling member such as a coil is placed at a site where the aneurysm occurs is known. In this method, the indwelling member is connected to the distal end portion of a guide member such as a tube via a connecting member. The guide member is passed through a catheter disposed in the living body. By operating the guide member under fluoroscopy, the indwelling member is guided to a desired position in the living body. When the indwelling member reaches the desired position, the connecting member disengages the indwelling member from the guide member. Thus, the indwelling member is placed at a desired position in the living body.

Patent Document 1 discloses a microcoil assembly having a microcoil part, a coil pusher part, a suture thread, and a tension wire. The tension wire is inserted through the through hole of the coil pusher portion. The microcoil portion is tied to the loop at the distal end portion of the pulling wire by a suture thread. In the microcoil assembly, the microcoil part is inserted into the cerebral aneurysm generation site of the patient by operating the coil pusher part. Thereafter, the pulling wire is pulled toward the proximal end side. The pull wire brings the suture thread tied to the loop at the tip portion into contact with the edge portion provided at the tip portion of the coil pusher portion. As a result, the suture thread is cut, and the microcoil portion is placed in the cerebral aneurysm generation site.

Special table 2013-507220 gazette

In the above device, the suture is cut by pulling the pull wire toward the proximal end. For this reason, force may be applied to the distal end portion of the coil pusher portion by reaction when the suture is cut. Due to this force, there is a possibility that a force directed from the distal end portion of the coil pusher portion toward the distal end side acts on the microcoil portion. In this case, force may be applied to the site where the cerebral aneurysm is generated. Further, there is a possibility that a force acts on the placed microcoil portion and moves.

An object of the present invention is to provide a medical device capable of appropriately removing an indwelling member from a guiding member after the indwelling member is guided to a desired position in a living body by the guiding member.

The medical device according to the present invention includes a cylindrical guide member extending in the extending direction between the proximal end and the distal end, and a linear member inserted into the guide member so as to be movable along the extending direction. And a connecting member provided on the distal end side of the guide member, the through hole through which a part of the linear member is inserted, and a first opening from which the distal end side of the linear member protrudes. A support part that removably supports the first through hole and the end part on the distal end side of the linear member, wherein the linear member moves in accordance with the movement of the linear member to the proximal end side. A connecting member having a support portion that can be switched from a support state in which the end portion on the tip side of the member is supported to a detached state in which the end portion on the tip side of the linear member is detached; and An indwelling member having an annular portion through which the protruding portion protruding from the first opening is inserted. The indwelling member, wherein connected to the coupling member in a supported state, characterized in that desorbed from the connecting member in the desorption state.

In a medical device, an indwelling member is guided to a desired position (for example, an aneurysm generation site) in a living body by a guiding member in a state where the indwelling member is coupled to a coupling member provided at an end portion on the distal end side of the guiding member. . After the indwelling member is disposed at a desired position, when the linear member moves to the proximal end side, the end portion on the distal end side of the linear member is detached from the support portion. As a result, the indwelling member is detached from the connecting member and placed in a desired position in the living body. The indwelling member is connected to the connecting member by inserting a linear member through the annular portion. Therefore, even if the linear member moves to the proximal end side, it is difficult for force to act on the indwelling member from the linear member. For this reason, when the indwelling member is detached from the connecting member, the possibility that a force acts on the site where the cerebral aneurysm is generated is reduced, and the movement of the indwelling member according to the movement of the linear member is suppressed. . Therefore, the medical device can appropriately remove the indwelling member from the connecting member after the indwelling member is guided to a desired position in the living body.

In the present invention, the support portion may include a clamping portion that clamps the end portion on the distal end side of the linear member. In this case, the medical device can easily form a support portion on the connecting member that can be switched from the support state to the detachment state in accordance with the movement of the linear member toward the proximal end.

In the present invention, the connecting member has a first concave portion that is recessed toward the base end side at an end portion on the distal end side, and the first concave portion is a bottom surface that is a surface intersecting the extending direction; The first opening is provided on the bottom surface of the first recess, and the support portion is provided on the side surface of the first recess. Good. In this case, the protruding portion of the linear member can be easily inclined with respect to the extending direction. In addition, when a protrusion part inclines with respect to an extending | stretching direction, the component of the extending | stretching direction of the force which acts on an indwelling member becomes small according to having moved the linear member to the base end side. Therefore, the medical device can further suppress the movement of the indwelling member according to the movement of the linear member.

In the present invention, the first opening and the support portion may be arranged side by side in the extending direction. In this case, the medical device can suppress the linear member from being bent in the vicinity of the first opening. Therefore, the medical device can smoothly move the linear member to the proximal end side and switch from the support state to the detached state.

In this invention, the said connection member has the 2nd recessed part dented in the direction which cross | intersects the said extending direction in the surface extended along the said extending | stretching direction, and the said 2nd recessed part is a surface which cross | intersects the said extending direction. It has a certain side, The 1st opening and the support part may be provided in the side of the 2nd crevice. In this case, a portion of the linear member through which the annular portion of the indwelling member is inserted can be disposed in the second recess. Therefore, the medical device can stabilize the state in which the linear member is inserted into the annular portion, and thus the linear member can be prevented from being detached from the annular portion when the indwelling member is guided by the guiding member.

In the present invention, the connecting member further has a second through-hole penetrating between the end portion on the distal end side and the side surface of the second recess, and through which the annular portion of the indwelling member is inserted. May be. In this case, the medical device can suppress the annular portion of the indwelling member from being disposed outside the outer peripheral surface of the connecting member. Therefore, the medical device can prevent the guide of the indwelling member by the guide member from being hindered by the annular portion. Further, the medical device can more effectively suppress the linear member from being detached from the annular portion when the indwelling member is guided by the guiding member.

In this invention, the said linear member is provided with the obstruction | occlusion member which obstruct | occludes the 2nd opening on the opposite side to the said 1st opening among the said 1st through-holes, The said obstruction | occlusion member is the said linear member in the said 2nd opening. May be switched between a state in which the linear member is held and a state in which the linear member is not held in the second opening. The blocking member can suppress the linear member from moving to the proximal end side when the indwelling member is guided by the guiding member while the linear member is held in the second opening. In addition, when the linear member moves to the proximal end side in order to switch the medical device from the support state to the detachment state, the blocking member is separated from the connecting member by keeping the linear member from being held in the second opening. The indwelling member can be detached.

In the present invention, the hardness of the first portion supported by at least the support portion of the linear member may be harder than the hardness of the second portion excluding the first portion. In this case, the medical device can easily support the linear member in a detachable manner by the support portion.

In the present invention, the protruding portion of the linear member may extend along the extending direction. In this case, the medical device can suppress bending of the linear member. Therefore, the medical device can smoothly move the linear member to the proximal end side and switch from the support state to the detached state.

In the present invention, the connecting member includes a first connecting member and a second connecting member that can be brought into contact with and separated from each other, and the support portion is the linear shape at a portion where the first connecting member and the second connecting member are in contact with each other. You may clamp the edge part of the said front end side of a member. In this case, the medical device can strongly support the linear member by the support portion by increasing the force with which the first connecting member and the second connecting member are pressed against each other. Therefore, the medical device can suppress the linear member from being detached from the support portion when the indwelling member is guided by the guiding member. On the other hand, the medical device can easily switch from the support state to the detached state according to the movement of the linear member by weakening the force with which the first connection member and the second connection member are pressed against each other.

In the present invention, the second connecting member has a third recessed portion that is recessed toward the proximal end at an end portion on the distal end side, and the third recessed portion is a surface that intersects the extending direction. The first opening may be provided on the bottom surface or the side surface of the third recess. The bottom surface may be a surface parallel to the extending direction. In this case, the protruding portion of the linear member can be easily crossed with respect to the extending direction. In addition, the component in the extending | stretching direction of the force which acts on an indwelling member becomes small, so that the angle in case a protrusion part cross | intersects with an extending | stretching direction approaches a right angle, according to having moved the linear member to the base end side. . Therefore, the medical device can further suppress the movement of the indwelling member according to the movement of the linear member.

In this invention, you may provide the holding | maintenance part which hold | maintains the part of a base end side rather than the said protrusion part to the said 1st connection member among the said linear members so that a movement is impossible. In this case, the medical device can maintain the state where the first connecting member and the second connecting member are strongly pressed against each other by the holding unit. Further, the medical device can easily weaken the force of the first connecting member and the second connecting member pressed against each other when the linear member moves to the proximal end side. Therefore, the medical device can be easily switched from the support state to the detached state according to the movement of the linear member to the proximal end side.

In the present invention, one of the first connecting member and the second connecting member may have a fitting portion into which the other of the first connecting member and the second connecting member fits. In this case, the medical device can maintain the state where the first connecting member and the second connecting member are strongly pressed against each other by the fitting portion.

In the present invention, the protruding portion of the linear member may extend along a direction orthogonal to the extending direction. In this case, the protruding portion of the linear member can be disposed along the direction orthogonal to the extending direction. In addition, when a protrusion part is extended in the direction orthogonal to an extending | stretching direction, when a linear member is moved to a base end side, the component of the extending | stretching direction of the force which acts on an indwelling member via an annular part becomes the smallest . Therefore, the medical device can further suppress the movement of the indwelling member according to the movement of the linear member.

In the present invention, the maximum outer diameter of the connecting member may be larger than the inner diameter of the guiding member. In this case, since it can suppress that a connection member moves according to the movement to the base end side of a linear member, a medical device can be appropriately switched from a support state to a desorption state.

It is a figure showing medical equipment 1A in a 1st embodiment. It is a figure for demonstrating the usage method of 1 A of medical devices in 1st Embodiment. It is a figure which shows the medical device 1B in 2nd Embodiment. It is a figure for demonstrating the usage method of the medical device 1B in 2nd Embodiment. It is a figure which shows the modification of 2nd Embodiment. It is a figure which shows medical device 1C in 3rd Embodiment. It is a figure for demonstrating the usage method of 1 C of medical devices in 3rd Embodiment. It is a figure which shows the modification of 3rd Embodiment. It is a figure which shows medical device 1D in 4th Embodiment. It is a figure for demonstrating the usage method of medical device 1D in 4th Embodiment. It is a figure which shows the modification of 4th Embodiment.

<First Embodiment>
A medical apparatus 1A according to the first embodiment will be described with reference to FIGS. The medical device 1A is used for vascular embolization. The medical device 1 </ b> A includes a guide member 2, a linear member 3, a connecting member 4, and an indwelling member 9.

<Induction member 2>
In vascular embolization, a catheter for guiding the medical device 1A is placed at a predetermined position in the living body. As shown in FIG. 1, the guide member 2 moves in a catheter arranged in the living body, and guides an indwelling member 9 described later to a desired position in the living body. The guide member 2 is cylindrical and has flexibility. The guide member 2 can be bent along the catheter. The inner diameter of the guide member 2 is substantially the same over the entire area in the extending direction. The guide member 2 has a space surrounded by an inner surface 21 that is an inner surface of the peripheral wall (hereinafter referred to as “lumen 21A”). The inner diameter of the guiding member 2 is denoted as L11, and the outer diameter of the guiding member 2 is denoted as L12.

Hereinafter, the direction of the medical device 1 </ b> A is defined based on the shape of the guide member 2 in order to help understand the description of the drawing. The direction in which the guide member 2 extends is referred to as “stretching direction”, and the direction orthogonal to the stretching direction is referred to as “orthogonal direction”. One end in the stretching direction is referred to as “tip”, and the other end is referred to as “base end”. The guide member 2 extends between the distal end and the proximal end along the extending direction. Of the radial direction based on the cross-sectional center of the guide member 2 on a plane orthogonal to the extending direction, the side close to the cross-sectional center of the guide member 2 is referred to as “inside” and is separated from the cross-sectional center of the guide member 2. The side is called “outside”. The above definition of the direction is also applied to medical devices 1B, 1C, and 1D in second to fourth embodiments described later.

The material of the guide member 2 is not particularly limited, and various materials having flexibility can be used. In addition, the part which is a part of the front end side of the induction | guidance | derivation member 2, and the connection member 4 mentioned later contacts the inner surface 21 may be formed with a different material from another part. At this time, the hardness of a part of the leading end side of the guide member 2 may be larger than the hardness of other parts.

<Connecting member 4>
The connecting member 4 is provided at the distal end portion of the guiding member 2. The connecting member 4 is made of resin and closes the lumen 21A at the distal end portion of the guide member 2. The connecting member 4 has a main body 41 and a protrusion 43.

The shape of the main body 41 is a cylindrical shape. The center of the main body 41 extends along the extending direction. The main body 41 fits into the lumen 21 </ b> A at the distal end of the guide member 2. The outer diameter of the main body 41 is denoted as L13. The outer diameter L13 is substantially the same as the inner diameter L11 of the guide member 2. The main body 41 has a main body side surface 41A and main body bottom surfaces 41B and 41C. The main body side surface 41A corresponds to the side surface of the main body portion 41 and extends in parallel with the extending direction. The main body side surface 41 </ b> A is in close contact with the inner surface 21 of the distal end portion of the guide member 2. The main body bottom surface 41 </ b> B corresponds to the bottom surface of the end portion on the front end side of the main body portion 41. The main body bottom surface 41 </ b> C corresponds to the bottom surface of the end portion on the proximal end side of the main body portion 41. The main body bottom surfaces 41B and 41C are orthogonal to the extending direction.

A first recess 42 that is recessed toward the base end side is formed on the main body bottom surface 41B. The cross-sectional shape of the first recess 42 is circular. The first recess 42 has a recess side surface 42A and a recess bottom surface 42B. The recess side surface 42A corresponds to the side surface of the first recess 42 and extends parallel to the extending direction. The recess bottom surface 42B corresponds to the bottom surface of the first recess 42 and is orthogonal to the extending direction.

The main body 41 has a first through hole 41E. The first through hole 41E extends in a direction inclined with respect to the extending direction across the recess bottom surface 42B and the main body bottom surface 41C. The opening formed in the recess bottom surface 42B by the first through hole 41E is referred to as a “first opening 411”. The first opening 411 is formed at a position shifted outward with respect to the center of the recess bottom surface 42B. An opening formed in the main body bottom surface 41 </ b> C by the first through hole 41 </ b> E is formed at the center of the main body bottom surface 41 </ b> C as a “second opening 412”.

The main body 41 has a clamping part 41F. The sandwiching portion 41F is a bottomed hole provided on the concave side surface 42A of the first concave portion 42. The clamping part 41F extends in a direction inclined outward from the proximal end side toward the distal end side. The sandwiching portion 41F is disposed along an imaginary straight line extending toward the distal end side along the first through hole 41E. The inner diameter of the sandwiching portion 41F is smaller than the inner diameter of the first through hole 41E.

The protrusion 43 protrudes outward from the end of the main body side surface 41A of the main body 41 on the front end side. The outer diameter of the protrusion 43 is denoted as L14. The outer diameter L14 is substantially the same as the outer diameter L12 of the guide member 2, and is larger than the inner diameter L11 of the guide member 2. The end portion on the distal end side of the protrusion 43 is inclined toward the proximal end side from the inside toward the outside. When the main body 41 enters the lumen 21A of the guide member 2 from the distal end side during the manufacturing process of the medical device 1A, the proximal end of the protrusion 43 contacts the end of the guide member 2 on the distal end side. . Thereby, the connecting member 4 is positioned with respect to the guide member 2.

<Linear member 3>
The linear member 3 is an elongated metal wire. The linear member 3 is inserted into the lumen 21 </ b> A of the guide member 2. The linear member 3 extends along the extending direction and is movable along the extending direction. The linear member 3 has a first portion 31 and a second portion 32. A part on the proximal end side of the linear member 3 corresponds to the second part 32, and the other part corresponds to the first part 31. The outer diameter of the first portion 31 is smaller than the inner diameter of the first through hole 41E of the connecting member 4, and is substantially the same as the inner diameter of the clamping part 41F. The first portion 31 and the second portion 32 have different hardnesses. The hardness of the first portion 31 is harder than the hardness of the second portion 32.

A closing member 36 is provided at a boundary portion between the first portion 31 and the second portion 32 of the linear member 3. The closing member 36 has a truncated cone shape. The linear member 3 passes through the center of the closing member 36. The diameter of the bottom surface of the closing member 36 on the first portion 31 side is smaller than the diameter of the bottom surface on the second portion 32 side. The linear member 3 is soldered to the bottom surface of the closing member 36 on the second portion 32 side. As a result, the closing member 36 is fixed to the linear member 3.

The first portion 31 of the linear member 3 can be inserted into the first through hole 41E of the connecting member 4. A part of the first portion 31 on the tip side from a portion inserted through the first through hole 41 </ b> E protrudes from the first opening 411. The end portion on the distal end side of the first portion 31 is inserted into the clamping portion 41F. Note that the outer diameter of the first portion 31 and the inner diameter of the sandwiching portion 41F are substantially the same. For this reason, the edge part of the front end side of the 1st part 31 is clamped by the inner wall of the clamping part 41F.

Hereinafter, the state of the medical device 1A when the end portion on the distal end side of the first portion 31 is sandwiched by the sandwiching portion 41F is referred to as a “supported state”. In the support state, a part of the linear member 3 that protrudes from the first opening 411 and is disposed in the first recess 42 is referred to as a “projecting part 3A”. The protruding portion 3A extends along the extending direction. More specifically, the protruding portion 3A extends in a direction slightly inclined with respect to the extending direction. The inclination angle of the protruding portion 3A with respect to the extending direction is not particularly limited, but the inclination angle is any angle from 0 degrees to 45 degrees, for example. In the support state, the closing member 36 fits into the second opening 412 from the proximal end side and closes the second opening 412. In a state in which the closing member 36 is fitted in the second opening 412, the linear member 3 is held in the second opening 412 and cannot move relative to the connecting member 4.

Exemplifies a case where a force in a direction toward the proximal end acts on the linear member 3 in the support state. In this case, the end portion on the distal end side of the first portion 31 of the linear member 3 is detached from the clamping portion 41F, and the closing member 36 is detached from the second opening 412. Hereinafter, the state of the medical device 1 </ b> A when the end portion on the distal end side of the first portion 31 is detached from the sandwiching portion 41 </ b> F is referred to as “detached state”. In the detached state, the linear member 3 is not held in the second opening 412 and can be moved relative to the connecting member 4. As described above, the clamping unit 41F can switch the medical device 1A between the support state and the detachment state by detachably supporting the end portion on the distal end side of the linear member 3. it can.

<Indwelling member 9>
The indwelling member 9 is disposed on the distal end side with respect to the guide member 2. The indwelling member 9 has a cored bar 91, a wire 92, and an annular part 93. The cored bar 91 has a rod shape and extends along the extending direction. The core 91 can be bent. The shape of both ends of the cored bar 91 is hemispherical. The wire 92 is wound in a coil shape around a portion excluding both ends of the cored bar 91. As the material of the wire 92, any one of platinum, tungsten, gold, tantalum, iridium, and alloys thereof having a small influence on the living body is used. The annular portion 93 is formed in an annular shape by connecting both ends of the string-like member to the proximal end of the cored bar 91. The annular portion 93 has flexibility. Hereinafter, the closed region inside the annular portion 93 is referred to as a “closed region 93A”. The shape of the closed region 93 </ b> A of the annular portion 93 is deformed in response to an external force acting.

In the support state, the protruding portion 3A of the linear member 3 is inserted into the closed region 93A of the annular portion 93. In addition, the edge part by the side of the front end of the linear member 3 is clamped by the clamping part 41F. The annular portion 93 is not detached from the protruding portion 3A. For this reason, the indwelling member 9 is connected to the connecting member 4 in the support state. On the other hand, as the medical device 1A changes from the support state to the detached state, the end portion on the distal end side of the linear member 3 is detached from the clamping portion 41F. The annular portion 93 can be detached from the protruding portion 3A. For this reason, in the linear member 3, the indwelling member 9 can be detached from the connecting member 4.

<How to use medical device 1A>
The end portion of the linear member 3 is sandwiched between the sandwiching portions 41 </ b> F of the connecting member 4, and the closing member 36 is fitted in the second opening 412 of the connecting member 4. As a result, the medical device 1A is brought into a support state. The indwelling member 9 is connected to the connecting member 4 by the linear member 3. The medical device 1A is inserted into a catheter (not shown) disposed in the living body with the indwelling member 9 disposed at the head in the traveling direction.

As shown in FIG. 2 (a), the user operates the guide member 2 and sequentially feeds it into the catheter (arrow Y11). Indwelling member 9 receives a force in the direction toward the distal end side from guiding member 2 (arrow Y12). The medical device 1A moves in the catheter toward the distal end side. The user guides the indwelling member 9 to a desired position in the living body by adjusting the feed amount of the guide member 2. As shown in FIG. 2B, when the indwelling member 9 reaches the desired position, the user stops the feeding operation of the guide member 2. The indwelling member 9 is disposed at a desired position.

As shown in FIG. 2C, the user operates the linear member 3 while holding the guide member 2 to apply a force in the direction toward the proximal end to the linear member 3. Note that the movement of the connecting member 4 toward the proximal end side is regulated by the protrusion 43 coming into contact with the end portion on the distal end side of the guiding member 2. For this reason, the edge part by the side of the front end of the linear member 3 detach | leaves from the clamping part 41F. The blocking member 36 is detached from the second opening 412. The linear member 3 moves to the proximal end side (arrow Y13). The protruding portion 3 </ b> A of the linear member 3 is disengaged from the closed region 93 </ b> A of the annular portion 93 of the indwelling member 9. The indwelling member 9 becomes detachable from the connecting member 4.

As shown in FIG. 2D, the user moves the linear member 3 further to the proximal side (arrow Y14). As a result, the first portion 31 of the linear member 3 is detached from the first through hole 41E. The user applies a force in a direction toward the proximal end side to the guide member 2. The guide member 2 and the connecting member 4 move to the proximal end side. (Arrow Y15). Since the indwelling member 9 is detached from the connecting member 4, the indwelling member 9 is indwelled at a desired position. The guide member 2, the linear member 3, and the connecting member 4 are taken out of the catheter.

<Operation and Effect of First Embodiment>
The indwelling member 9 of the medical device 1A is guided to a desired position in the living body (for example, an aneurysm generation site) by the guide member 2 in a state of being connected to the connecting member 4 (arrows Y11, Y12, FIG. 2 ( a)). After the indwelling member 9 is disposed at a desired position (see FIG. 2B), when the linear member 3 moves to the proximal end side (see arrow Y13, FIG. 2C), the distal end of the linear member 3 The end on the side is detached from the clamping part 41F. As a result, the indwelling member 9 is detached from the connecting member 4 and placed in a desired position in the living body. Here, the indwelling member 9 is connected to the connecting member 4 by inserting the linear member 3 through the annular portion 93. Therefore, even if the linear member 3 moves to the proximal end side in the above process, it is difficult for force to act on the indwelling member 9 from the linear member 3. Therefore, when the indwelling member 9 is detached from the connecting member 4, the possibility that a force acts on the site where the cerebral aneurysm is generated is reduced, and the indwelling member is caused by the reaction of the force according to the movement of the linear member 3. 9 is suppressed from moving from the desired position. Accordingly, the medical device 1A can appropriately remove the indwelling member 9 from the connecting member 4 after the indwelling member 9 is guided to a desired position in the living body.

The sandwiching portion 41F is a bottomed hole having a smaller diameter than the first portion 31 of the linear member 3. The clamping part 41F can suppress the linear member 3 from being detached by clamping the end of the linear member 3 on the distal end side with the inner wall. On the other hand, the sandwiching portion 41F can detach the linear member 3 in response to the force in the direction toward the proximal end acting on the linear member 3. In other words, the medical device 1A can easily realize a mechanism capable of switching from the support state to the detached state by the sandwiching portion 41F.

The connecting member 4 has a first recess 42. The first opening 411 of the first through hole 41E is provided at the center of the recess bottom surface 42B. The clamping portion 41F is provided on the concave side surface 42A. For this reason, 3 A of protrusion parts of the linear member 3 are extended in the direction which inclines with an extending | stretching direction toward the clamping part 41F from the 1st opening 411. FIG. In addition, when the linear member 3 moves to the base end side in the process of detachment of the indwelling member 9, a force in a direction toward the base end side acts on a contact portion of the annular portion 93 with the protruding portion 3A. There is a case. In this case, since the protruding portion 3A is inclined with respect to the extending direction, the component in the extending direction of the force acting on the annular portion 93 from the protruding portion 3A is smaller than when the protruding portion 3A extends in the extending direction. . For this reason, 1 A of medical devices can suppress the force of the direction toward the proximal end which acts on the indwelling member 9 according to the movement of the linear member 3. Therefore, 1 A of medical devices can suppress that the indwelling member 9 moves from a desired position by reaction of the force according to the movement of the linear member 3.

A closing member 36 is provided on the linear member 3. The closing member 36 holds the linear member 3 in the second opening 412 in a state of being fitted in the second opening 412, and makes the linear member 3 relatively unmovable with respect to the connecting member 4. For this reason, the closing member 36 can suppress the linear member 3 from moving to the proximal end side when the indwelling member 9 is guided by the guide member 2. Further, the closing member 36 does not hold the linear member 3 in the second opening 412 in a state of being detached from the second opening 412, and enables the linear member 3 to move relative to the connecting member 4. For this reason, the closing member 36 can easily detach the end portion on the distal end side of the linear member 3 from the clamping portion 41 </ b> F when the indwelling member 9 is detached from the connecting member 4. Note that the hardness of the first portion 31 of the linear member 3 is harder than the hardness of the second portion 32. For this reason, the clamping part 41F is easy to stably clamp the first portion 31 of the linear member 3. Accordingly, the medical device 1A can easily hold the linear member 3 in a detachable manner by the holding portion 41F.

The outer diameter of the protrusion 43 of the connecting member 4 is substantially the same as the outer diameter L12 of the guide member 2, and is larger than the inner diameter L11 of the guide member 2. For this reason, the connecting member 4 can be easily positioned with respect to the guide member 2 by bringing the protrusion 43 into contact with the guide member 2. Further, when the linear member 3 is operated to detach the indwelling member 9 from the connecting member 4, the connecting member 4 cannot move to the proximal end side with respect to the guide member 2. That is, the movement of the connecting member 4 to the proximal end side is suppressed by the protrusion 43. Therefore, the medical device 1A suppresses the movement of the connecting member 4 to the proximal side in response to the movement of the linear member 3 to the proximal side, and can appropriately switch from the support state to the detached state. it can.

<Modification of First Embodiment>
The clamping part 41F is not limited to a bottomed hole. For example, the clamping part 41F may be a slit-like cut provided on the concave side surface 42A. The cut may be formed by two opposing wall portions. In this case, the sandwiching portion 41F may sandwich the end portion on the distal end side of the linear member 3 between the two wall portions. Moreover, the edge part of the front end side of the linear member 3 may be adhere | attached on the recessed part side surface 42A so that peeling is possible with an adhesive agent. When a force in a direction toward the proximal end acts on the linear member 3, the linear member 3 may be peeled from the concave side surface 42A.

The recess bottom surface 42B of the first recess 42 may be inclined with respect to the direction orthogonal to the extending direction. The sandwiching portion 41F may be provided on the recess bottom surface 42B. In this case, the protruding portion 3A of the linear member 3 extends from the first opening 411 to the distal end side, bends to the proximal end side and extends to the proximal end side, and the distal end end portion is sandwiched by the sandwiching portion 41F. Good. The first opening 411 may be provided on the concave side surface 42A.

The first through hole 41E may extend in the extending direction. The first opening 411 may be formed at the center of the recess bottom surface 42B of the first recess 42. In this case, the first portion 31 of the linear member 3 may extend in the extending direction along the first through hole 41E and bend at the first opening 411. The protruding portion 3A of the linear member 3 may extend in a direction inclined with respect to the extending direction.

The closing member 36 may not be provided on the linear member 3. The linear member 3 may always be movable with respect to the connecting member 4. Of the first portion 31 of the linear member 3, the hardness of the portion clamped by the clamping portion 41F may be different from the hardness of the other portion. In this case, the hardness of the part clamped by the clamping part 41F among the linear members 3 may be harder than the hardness of other parts. The linear member 3 may have a uniform hardness over the entire area. The connecting member 4 has only the main body 41 and may not have the protrusion 43. The outer diameter of the connecting member 4 may be L13 over the entire area.

The connecting member 4 may include a protruding portion that is orthogonal to the extending direction and protrudes outward. The guide member 2 may be formed with a hole that can be fitted to the protruding portion of the connecting member 4. By connecting the protrusion and the hole, the connecting member 4 and the guiding member 2 are more firmly connected. The hole formed in the guide member 2 may be a bottomed hole or a through hole. A plurality of protrusions and holes may be provided.

Second Embodiment
A medical device 1B according to the second embodiment will be described with reference to FIGS. In the second embodiment, a connecting member 5 is used instead of the connecting member 4 in the first embodiment. Since the guide member 2, the linear member 3, and the indwelling member 9 are the same as those in the first embodiment, description thereof is omitted.

<Connecting member 5>
The connecting member 5 has a main body 51 and a protrusion 53. The main body 51 and the protrusion 53 correspond to the main body 41 and the protrusion 43 in the connecting member 4 (see FIG. 1) of the first embodiment, respectively. The main body side surface 51A and the main body bottom surfaces 51B and 51C of the main body portion 51 correspond to the main body side surface 41A and the main body bottom surfaces 41B and 41C of the main body portion 41 of the connecting member 4, respectively. A second recess 52 that is recessed in the orthogonal direction is formed on the main body side surface 51A. The cross-sectional shape of the second recess 52 is circular. The second recess 52 has a recess side surface 52A and a recess bottom surface 52B. The recess side surface 52A corresponds to the side surface of the second recess 52 and is orthogonal to the extending direction. The recess bottom surface 52B corresponds to the bottom surface of the second recess 52 and extends parallel to the extending direction.

The main body 51 has a first through hole 51E. The first through hole 51E extends between the base end side portion of the recess side surface 52A and the main body bottom surface 51C. The opening formed in the recess side surface 52A by the first through hole 51E is referred to as a “first opening 511”. The opening formed in the main body bottom surface 51C by the first through hole 51E is referred to as a “second opening 512”. The second opening 512 is provided at the center of the main body bottom surface 51C. The first through hole 51E extends in the extending direction from the second opening 512 toward the first opening 511.

The main body 51 has a clamping part 51F. The sandwiching portion 51F is a through hole extending between the tip side portion of the recess side surface 52A and the main body bottom surface 51B. The inner diameter of the sandwiching portion 51F is smaller than the inner diameter of the first through hole 51E and is substantially the same as the outer diameter of the first portion 31 of the linear member 3. The clamping part 51F extends in the extending direction. The opening formed in the recess side surface 52A by the sandwiching part 51F is referred to as an “opening 513”. An opening formed in the bottom surface 51B of the main body by the sandwiching portion 51F is referred to as an “opening 514”. The opening 514 is provided at the center of the main body bottom surface 51B. The sandwiching portion 51F extends in the extending direction from the opening 514 toward the opening 513. The first through holes 51E and the sandwiching portions 51F are arranged in a straight line in the extending direction. For this reason, the first opening 511 of the first through hole 51E and the opening 513 of the sandwiching portion 51F are arranged side by side in the extending direction with the second recess 52 interposed therebetween.

The first portion 31 of the linear member 3 can be inserted into the first through hole 51E and the clamping portion 51F. A part of the first portion 31 on the tip side from a portion inserted through the first through hole 51 </ b> E protrudes from the first opening 511. The first portion 31 crosses the second recess 52 in the extending direction. A portion on the distal end side of the first portion 31 is inserted into the holding portion 51F. The end portion on the distal end side of the first portion 31 slightly protrudes toward the distal end side from the opening 514 of the main body bottom surface 51B. Note that the outer diameter of the first portion 31 and the inner diameter of the sandwiching portion 51F are substantially the same. For this reason, the part of the front end side of the 1st part 31 is clamped by the inner wall of the clamping part 51F.

The state of the medical device 1B when the distal end portion of the first portion 31 is sandwiched by the sandwiching portion 51F corresponds to the “supported state”. In the support state, a part of the linear member 3 that protrudes from the first opening 511 and is disposed in the second recess 52 corresponds to the “protrusion 3 </ b> A”. The protruding portion 3A extends along the extending direction. More specifically, the protrusion 3A extends in parallel with the extending direction. In the support state, the closing member 36 fits into the second opening 512 from the proximal end side and closes the second opening 512. The linear member 3 is held in the second opening 512 in a state where the closing member 36 is fitted in the second opening 512.

Exemplifies a case where a force in a direction toward the proximal end acts on the linear member 3 in the support state. In this case, the front end portion of the first portion 31 is detached from the sandwiching portion 51F, and the closing member 36 is detached from the second opening 512. The state of the medical device 1B when the distal end portion of the first portion 31 is detached from the sandwiching portion 51F corresponds to the “detached state”. In the detached state, the linear member 3 is not held in the second opening 512.

The main body 51 has a second through hole 51G. The second through hole 51G extends between the tip side portion of the concave side surface 52A and the main body bottom surface 51B. The inner diameter of the second through hole 51G is larger than the inner diameter of the first through hole 51E. An opening formed in the recess side surface 52A by the second through hole 51G is referred to as an “opening 515”. An opening communicating with the bottom surface 51B of the main body through the second through hole 51G is referred to as an “opening 516”. The opening 516 is provided at a position shifted outward from the center of the main body bottom surface 51B. The second through hole 51G extends in the extending direction from the opening 516 toward the opening 515.

The annular portion 93 of the indwelling member 9 is inserted through the opening 516 into the second through hole 51G. A portion on the proximal end side of the annular portion 93 protrudes from the opening 515 into the second recess 52. In the support state, the protruding portion 3 </ b> A of the linear member 3 is inserted into the closed region 93 </ b> A of the annular portion 93. In addition, the part of the front end side of the linear member 3 is clamped by the clamping part 51F. The annular portion 93 is not detached from the protruding portion 3A. For this reason, the indwelling member 9 is connected to the connecting member 5 in the support state. On the other hand, as the medical device 1B changes from the support state to the detached state, the distal end side portion of the linear member 3 is detached from the clamping portion 51F. The annular portion 93 can be detached from the protruding portion 3A. Therefore, the indwelling member 9 can be detached from the connecting member 4 in the detached state.

<How to use medical device 1B>
The usage method of the medical device 1B is the same as the usage method of the medical device 1A. A brief description will be given below. As shown to Fig.4 (a), a user operates the guide member 2 of the medical device 1B, and sends out sequentially in a catheter (arrow Y21). Indwelling member 9 receives a force in the direction toward the distal end side from guiding member 2 (arrow Y22). As shown in FIG. 4B, the indwelling member 9 reaches a desired position. As shown in FIG. 4C, the user operates the linear member 3 while holding the guide member 2, and applies a force in a direction toward the proximal end side to the linear member 3. The end portion on the distal end side of the linear member 3 is detached from the clamping portion 51F. The linear member 3 moves to the proximal end side (arrow Y23). The protruding portion 3 </ b> A of the linear member 3 comes off from the closed region 93 </ b> A of the annular portion 93 of the indwelling member 9. The indwelling member 9 becomes detachable from the connecting member 4.

As shown in FIG. 4D, the user moves the linear member 3 further to the proximal end side (arrow Y24). The user applies a force in a direction toward the proximal end side to the guide member 2. The guide member 2 and the connecting member 4 move to the proximal end side (arrow Y25). The indwelling member 9 is indwelled at a desired position. The guide member 2, the linear member 3, and the connecting member 5 are taken out of the catheter.

<Operation and Effect of Second Embodiment>
Hereinafter, only effects different from the first embodiment will be described. In the medical device 1B, the first through holes 51E and the sandwiching portions 51F are arranged in a straight line in the extending direction. The protruding portion 3A of the linear member 3 extends in parallel with the extending direction. For this reason, since medical device 1B can control that linear member 3 bends near the 1st opening 511, it can move linear member 3 to the base end side smoothly. Therefore, the user can easily switch from the state in which the end portion on the front end side of the linear member 3 is sandwiched by the sandwiching portion 51F to the state in which the end portion on the front end side of the linear member 3 is detached from the sandwiching portion 51F. Can do.

In the medical device 1B, the second recess 52 is provided on the main body side surface 51A of the connecting member 5. The second recess 52 is recessed in the orthogonal direction. Inside the second recess 52, the protruding portion 3 </ b> A of the linear member 3 is inserted into the closed region 93 </ b> A of the annular portion 93. For this reason, when guiding the indwelling member 9, it is difficult for an external object to come into contact with the protruding portion 3 </ b> A and the annular portion 93 of the linear member 3 from the front in the traveling direction. Accordingly, the medical device 1B can stabilize the state where the annular portion 93 is inserted into the linear member 3, so that the linear member 3 is detached from the annular portion 93 when the indwelling member 9 is guided by the guiding member 2. Can be suppressed.

The sandwiching portion 51F and the second through hole 51G extend between the tip side portion of the recess side surface 52A of the second recess 52 and the main body bottom surface 51B. The annular portion 93 of the indwelling member 9 is inserted through the second through hole 51G. For this reason, when guiding the indwelling member 9, it is difficult for an external object to come into contact with the protruding portion 3 </ b> A and the annular portion 93 of the linear member 3 from the outside in the orthogonal direction. Accordingly, the medical device 1B can stabilize the state where the annular portion 93 is inserted into the linear member 3, so that the linear member 3 is detached from the annular portion 93 when the indwelling member 9 is guided by the guiding member 2. Can be suppressed. Further, the guide of the indwelling member 9 by the guide member 2 can be executed smoothly.

<Modification of Second Embodiment>
The first opening 511 of the first through hole 51E and the opening 513 of the holding part 51F may be arranged at positions shifted in the radial direction. The extending direction of the first through hole 51E may be inclined with respect to the extending direction. In this case, the clamping part 51F may be arranged along an imaginary straight line extending to the tip side along the first through hole 51E. The protruding portion 3A may extend in a direction inclined with respect to the extending direction. The clamping part 51F may be provided on the recess bottom surface 52B.

For example, as shown in FIG. 5, a portion of the main body 51 of the connecting member 5 that is on the tip side of the second recess 52, that is, a portion of the main body 51 that is provided with the second through hole 51 </ b> G in FIG. 3. The peripheral part of may be cut out. In this case, a gap is formed between the inner surface 21 of the guiding member 2 and the portion of the main body 51 on the tip side of the second recess 52. The annular portion 93 of the indwelling member 9 may extend to the inside of the second recess 52 through this gap.

<Third Embodiment>
A medical device 1C according to the third embodiment will be described with reference to FIGS. In the third embodiment, a connecting member 6 is used instead of the connecting member 4 in the first embodiment. Since the guide member 2, the linear member 3, and the indwelling member 9 are the same as those in the first embodiment, description thereof is omitted.

<Connecting member 6>
The connecting member 6 includes a first connecting member 6A and a second connecting member 6B. The shape of the first connecting member 6A is a columnar shape. The center of the first connecting member 6A extends along the extending direction. The outer diameter of the first connecting member 6A is the outer diameter of the main body 41 (see FIG. 1) of the connecting member 4 in the first embodiment and the main body 51 (see FIG. 3) of the connecting member 5 in the second embodiment. Is equal to L13 and is substantially the same as the inner diameter L11 of the guide member 2. The first connecting member 6A has a connecting side surface 60A and connecting bottom surfaces 60B and 60C. The connection side surface 60A corresponds to the side surface of the first connection member 6A. The connection bottom surface 60B corresponds to the bottom surface on the tip side of the first connection member 6A. The connection bottom surface 60C corresponds to the bottom surface on the base end side of the first connection member 6A. The first connecting member 6A has a through hole 60E. The through hole 60E passes through the center of the first connecting member 6A and extends in the extending direction between the connecting bottom surfaces 60B and 60C. The opening formed in the connection bottom surface 60B by the through hole 60E is referred to as “opening 601”, and the opening formed in the connection bottom surface 60C is referred to as “second opening 602”.

The second connecting member 6 </ b> B has a main body 61 and a protrusion 63. The main body 61 and the protrusion 63 correspond to the main body 41 and the protrusion 43 in the connecting member 4 (see FIG. 1) of the first embodiment, respectively. The main body side surface 61A and the main body bottom surfaces 61B and 61C of the main body portion 61 correspond to the main body side surface 41A and the main body bottom surfaces 41B and 41C of the main body portion 41 of the connecting member 4 in the first embodiment, respectively. A third recess 62 that is recessed toward the base end side is formed on the main body bottom surface 61B. The third recess 62 has a recess side surface 62A and a recess bottom surface 62B. The concave side surface 62A and the concave bottom surface 62B respectively correspond to the concave side surface 42A and the concave bottom surface 42B of the first concave portion 42 in the first embodiment. The second connecting member 6B is disposed on the distal end side of the first connecting member 6A. The main body bottom surface 61C of the second connecting member 6B and the connecting bottom surface 60B of the first connecting member 6A can be separated from each other.

The main body 61 has a first through hole 61E and a through hole 61G. The first through hole 61E extends in the orthogonal direction between the concave side surface 62A and the main body side surface 61A. The opening formed in the recess side surface 62A by the first through hole 61E is referred to as a “first opening 611”. An opening formed in the main body side surface 61A by the first through hole 61E is referred to as an “opening 612”. The through hole 61G extends in the orthogonal direction across the portion of the recess side surface 62A that faces the first opening 611 and the main body side surface 61A. An opening formed in the recess side surface 62A by the through hole 60E is referred to as an “opening 613”. An opening formed in the main body side surface 61A by the through hole 60E is referred to as an “opening 614”. The first through hole 61E and the through hole 60E are arranged in a straight line in the orthogonal direction.

Grooves 66 and 67 are formed in the main body side surface 61A. The groove 66 extends in the extending direction from the opening 612 toward the base end side. The groove 67 extends in the extending direction from the opening 614 toward the base end side. The depths of the grooves 66 and 67 are slightly larger than the diameter of the first portion 31 of the linear member 3.

The first portion 31 of the linear member 3 includes a through hole 60E of the first connecting member 6A, a connecting bottom surface 60B of the first connecting member 6A, and a main body bottom surface 61C of the second connecting member 6B, a groove 66, and a first through hole. It passes through the hole 61E, the third recess 62, the through hole 61G, and the groove 67 in order. The front end portion of the first portion 31 is disposed between the connection bottom surface 60B of the first connection member 6A and the main body bottom surface 61C of the second connection member 6B. In a state where the first connecting member 6A and the second connecting member 6B are in contact with each other, the tip side portion of the first portion 31 is sandwiched between the connecting bottom surface 60B and the main body bottom surface 61C. Hereinafter, a portion of each of the connection bottom surface 60B and the main body bottom surface 61C that sandwich the portion on the distal end side of the first portion 31 is referred to as a “nip portion 61F”.

The state of the medical device 1C when the distal end portion of the first portion 31 of the linear member 3 is sandwiched by the sandwiching portion 61F corresponds to the “supported state”. In the support state, a part of the linear member 3 that protrudes from the first opening 611 and is disposed in the third recess 62 corresponds to the “protrusion 3 </ b> A”. The protrusion 3A extends in the orthogonal direction.

The holding portion 37 is a boundary portion between the first portion 31 and the second portion 32 of the linear member 3, that is, a portion of the linear member 3 on the base end side with respect to the protruding portion 3 </ b> A of the first connecting member 6 </ b> A. The second opening 602 formed in the connection bottom surface 60C is held immovably. The holding part 37 moves the first connecting member 6 </ b> A to the proximal end side according to the movement of the linear member 3. In this case, a gap is generated between the connection bottom surface 60B and the main body bottom surface 61C. A portion on the distal end side of the first portion 31 of the linear member 3 is detached from the clamping portion 61F. The state of the medical device 1 </ b> C when the distal portion of the first portion 31 is detached from the clamping unit 61 </ b> F corresponds to the “detached state”.

In the support state, the protruding portion 3A of the linear member 3 is inserted into the closed region 93A of the annular portion 93. In addition, the part of the front end side of the linear member 3 is clamped by the clamping part 61F. The annular portion 93 is not detached from the protruding portion 3A. For this reason, the indwelling member 9 is connected to the connecting member 6 in the support state. On the other hand, when the medical device 1C is changed from the support state to the detached state, the distal end portion of the linear member 3 is detached from the clamping portion 61F. The annular portion 93 can be detached from the protruding portion 3A. For this reason, the indwelling member 9 can be detached from the connecting member 6 in the detached state.

<How to use medical device 1C>
The usage method of the medical device 1C is the same as the usage method of the medical device 1A. A brief description will be given below. As shown in FIG. 7A, the user operates the guide member 2 of the medical device 1C to sequentially send it out into the catheter (arrow Y31). Indwelling member 9 receives a force in the direction toward the distal end side from guiding member 2 (arrow Y32). As shown in FIG. 7B, the indwelling member 9 reaches a desired position. As illustrated in FIG. 7C, the user operates the linear member 3 while holding the guide member 2, and applies a force in a direction toward the proximal end side to the linear member 3. As the linear member 3 moves to the proximal end side, the first connecting member 6A of the connecting member 6 moves to the proximal end side. A gap is generated between the first connecting member 6A and the second connecting member 6B. For this reason, the part of the front end side of the linear member 3 detach | leaves from the clamping part 61F. The linear member 3 and the first connecting member 6A move to the proximal end side (arrow Y33). The protruding portion 3 </ b> A of the linear member 3 comes off from the closed region 93 </ b> A of the annular portion 93 of the indwelling member 9. The indwelling member 9 becomes detachable from the connecting member 6.

As shown in FIG. 7D, the user moves the linear member 3 further to the proximal end side (arrow Y34). The user applies a force in a direction toward the proximal end side to the guide member 2. The guide member 2 and the connecting member 6 move to the proximal end side. (Arrow Y35). The indwelling member 9 is indwelled at a desired position. The guide member 2, the linear member 3, and the connecting member 6 are taken out of the catheter.

<Operation and Effect of Third Embodiment>
Hereinafter, only effects different from those of the first embodiment and the second embodiment will be described. The connecting member 6 includes a first connecting member 6A and a second connecting member 6B. In the support state, the tip side portion of the linear member 3 is clamped by a clamping portion 61F formed at the contact portion of the first connecting member 6A and the second connecting member 6B. In this case, the medical device 1C can strongly hold the linear member 3 by the holding portion 61F by increasing the force with which the first connecting member 6A and the second connecting member 6B are pressed against each other. Therefore, the medical device 1 </ b> C can appropriately suppress the linear member 3 from being detached from the holding portion 61 </ b> F when the indwelling member 9 is guided by the guide member 2. On the other hand, when the linear member 3 moves to the proximal end side, the medical device 1C can easily weaken the force with which the first connecting member 6A and the second connecting member 6B are pressed against each other. Therefore, the medical device 1 </ b> C can be easily switched from the support state to the detached state by the movement of the linear member 3.

The main body 61 of the second connecting member 6B has a third recess 62. The first opening 611 of the first through hole 61E and the opening 613 of the through hole 61G face each other in the orthogonal direction. In this case, the protruding portion 3A of the linear member 3 is orthogonal to the extending direction. In addition, the component in the extending direction of the force acting on the indwelling member 9 in accordance with the movement of the linear member 3 toward the proximal end as the angle when the protruding portion 3A intersects the extending direction approaches a right angle. Becomes smaller. Further, when the protruding portion 3A extends in a direction orthogonal to the extending direction, the component in the extending direction of the force acting on the indwelling member 9 according to the movement of the linear member 3 toward the proximal end is the smallest. Become. Therefore, the medical device 1 </ b> C can further effectively suppress the indwelling member 9 from moving from the desired position due to the reaction of the force according to the movement of the linear member 3.

The holding part 37 holds the first connecting member 6 </ b> A so as not to move with respect to the linear member 3. In this case, the medical device 1 </ b> C can maintain the state where the first connecting member 6 </ b> A and the second connecting member 6 </ b> B are strongly pressed against each other by the holding unit 37. Further, since the first connecting member 6A held by the linear member 3 can be moved in accordance with the movement of the linear member 3 toward the proximal end side, the first connecting member 6A and the second connecting member are pressed against each other. Can easily weaken the force. Therefore, the medical device 1C can be easily switched from the support state to the detached state in accordance with the movement of the linear member 3 to the proximal end side.

<Modification of Third Embodiment>
The first through hole 61E may extend in the extending direction from the center of the main body bottom surface 61C toward the recess bottom surface 62B of the third recess 62. The first opening 611 may be provided at the center of the recess bottom surface 62B. The first portion 31 of the linear member 3 may extend in the extending direction through the first through hole 61E. The protruding portion 3A of the linear member 3 may extend from the first opening 611 toward the opening 613 provided on the recess side surface 62A in a direction inclined with respect to the extending direction. For example, as shown in FIG. 8, the first through hole 61 </ b> E may be formed inside the main body 61. The first through hole 61E may extend inside the main body 61 from the center of the main body bottom surface 61C to the first opening 611 of the concave side surface 62A.

<Fourth embodiment>
A medical device 1D according to the fourth embodiment will be described with reference to FIGS. In the fourth embodiment, a connecting member 7 is used instead of the connecting member 4 in the first embodiment. Since the guide member 2, the linear member 3, and the indwelling member 9 are the same as those in the first embodiment, description thereof is omitted.

<Connecting member 7>
The connecting member 7 includes a first connecting member 7A and a second connecting member 7B. The shape of the second connecting member 7B is substantially the same as the second connecting member 6B (see FIG. 6) in the third embodiment. The main body 71 and the protrusion 73 of the second connecting member 7B correspond to the main body 61 and the protrusion 63 (see FIG. 6), respectively. The main body side surface 71A and the main body bottom surfaces 71B and 71C of the main body portion 71 correspond to the main body side surface 61A and the main body bottom surfaces 61B and 61C (see FIG. 6), respectively. The third recess 72 corresponds to the third recess 62 (see FIG. 6). The concave side surface 72A and the concave bottom surface 72B of the third concave portion 72 correspond to the concave side surface 62A and the concave bottom surface 62B (see FIG. 6) of the third concave portion 62, respectively. The first through hole 71E and the through hole 71G of the main body 71 correspond to the first through hole 61E and the through hole 61G (see FIG. 6), respectively. The first opening 711 and the opening 712 of the first through hole 71E and the openings 713 and 714 of the through hole 71G correspond to the first opening 611, the openings 612, 613, and 614 (see FIG. 6), respectively. The grooves 76 and 77 of the main body 71 correspond to the grooves 66 and 67 (see FIG. 6) of the main body 61, respectively.

The second connecting member 7B is different from the second connecting member 6B in that a fitting portion 75 that is recessed toward the distal end side is provided at the center of the main body bottom surface 71C. The fitting part 75 has a fitting side surface 75A and a fitting bottom surface 75B. The fitting side surface 75 </ b> A corresponds to the side surface of the fitting portion 75, and the fitting bottom surface 75 </ b> B corresponds to the bottom surface of the fitting portion 75. The inner diameter of the fitting portion 75 becomes smaller toward the fitting bottom surface 75B. The inner diameter of the fitting portion 75 is smaller than the inner diameter of the third recess 72.

The shape of the first connecting member 7A is a truncated cone. The center of the first connecting member 7A extends along the extending direction. The first connecting member 7A has a connecting side surface 70A and connecting bottom surfaces 70B and 70C. The connecting side surface 70A corresponds to the side surface of the first connecting member 7A. The connection bottom surface 70B corresponds to the bottom surface on the distal end side of the first connection member 7A. The connection bottom surface 70C corresponds to the bottom surface on the base end side of the first connection member 7A. The diameter of the connecting bottom surface 70B is smaller than the diameter of the connecting bottom surface 70C. The first connecting member 7A can be fitted to the fitting portion 75 of the second connecting member 7B.

The first connecting member 7A has a through hole 70E. The through hole 70E extends in the extending direction from the center of the connection bottom surface 70C toward the distal end, bends outward inside the first connection member 7A, and extends in the orthogonal direction to the connection side surface 70A. The opening formed in the connection side surface 70A by the through hole 70E is referred to as “opening 701”, and the opening formed in the connection bottom surface 70C is referred to as “second opening 702”. The holding portion 37 holds the boundary portion between the first portion 31 and the second portion 32 of the linear member 3 in the second opening 702 formed on the connection bottom surface 70C of the first connection member 7A so as not to move.

The first portion 31 of the linear member 3 includes a through hole 70E of the first connecting member 7A, a base end side of the bottom surface 71C of the main body of the second connecting member 7B, a groove 76, a first through hole 71E, the third recess 72, The through hole 71G, the groove 77, and the base end side of the main body bottom surface 71C of the second connecting member 7B pass in order. The front end portion of the first portion 31 is disposed between the connecting side surface 70A of the first connecting member 7A and the fitting side surface 75A of the second connecting member 7B. In a state where the first connecting member 7A is fitted to the second connecting member 7B, the tip side portion of the first portion 31 is sandwiched between the connecting side surface 70A and the fitting side surface 75A. Hereinafter, the portion of the connecting side surface 70A and the fitting side surface 75A that sandwiches the tip side portion of the first portion 31 is referred to as a “nip portion 71F”.

The state of the medical device 1D when the end portion on the distal end side of the first portion 31 is sandwiched by the sandwiching portion 71F corresponds to the “supported state”. In the support state, a part of the linear member 3 that protrudes from the first opening 711 and is disposed in the third recess 72 corresponds to the “projecting part 3A”. The protrusion 3A extends in the orthogonal direction.

The holding part 37 moves the first connecting member 7 </ b> A to the proximal end side according to the movement of the linear member 3. In this case, a gap is generated between the connecting side surface 70A and the fitting side surface 75A. A portion on the tip end side of the first portion 31 of the linear member 3 is detached from the clamping portion 71F. The state of the medical device 1D when the end portion on the distal end side of the first portion 31 is detached from the sandwiching portion 71F corresponds to the “detached state”.

In the support state, the protruding portion 3A of the linear member 3 is inserted into the closed region 93A of the annular portion 93. In addition, the part of the front end side of the linear member 3 is clamped by the clamping part 71F. The annular portion 93 is not detached from the protruding portion 3A. For this reason, the indwelling member 9 is connected to the connecting member 7 in the support state. On the other hand, when the medical device 1D is changed from the support state to the detached state, the portion on the distal end side of the protruding portion 3A is detached from the sandwiching portion 71F. The annular portion 93 can be detached from the protruding portion 3A. For this reason, the indwelling member 9 can be detached from the connecting member 7 in the detached state.

<How to use medical device 1D>
The usage method of the medical device 1D is the same as the usage method of the medical device 1C. A brief description will be given below. As shown in FIG. 10A, the user sequentially sends out the proximal end side of the guide member 2 of the medical device 1D into the catheter (arrows Y41 and Y42). As shown in FIG. 10B, the indwelling member 9 reaches a desired position. As shown in FIG. 10C, the user applies a force in a direction toward the proximal end side to the linear member 3. When the linear member 3 moves to the proximal end side, a gap is generated between the first connecting member 7A and the second connecting member 7B. A portion on the tip side of the linear member 3 is detached from the sandwiching portion 71F. The linear member 3 and the first connecting member 7A move to the proximal end side (arrow Y43). The protruding portion 3 </ b> A of the linear member 3 comes off from the closed region 93 </ b> A of the annular portion 93 of the indwelling member 9. As shown in FIG. 10D, the user further moves the linear member 3 to the proximal end side (arrow Y44). The user applies a force in a direction toward the proximal end side to the guide member 2. The guide member 2 and the connecting member 7 move to the proximal end side (arrow Y45). The indwelling member 9 is indwelled at a desired position.

<Operation and Effect of Fourth Embodiment>
Only the effects different from those of the first to third embodiments will be described below. The medical device 1D includes a first connecting member 7A and a second connecting member 7B. The first connecting member 7A is fitted into the fitting portion 75 of the second connecting member 7B. In the support state, the tip-side portion of the linear member 3 is sandwiched by a sandwiching portion 71F formed by the first connecting member 7A and the fitting portion 75. In this case, the medical device 1D can maintain the state where the first connecting member 7A and the second connecting member 7B are strongly pressed to each other by the fitting portion 75. Therefore, the medical device 1D can appropriately sandwich the distal end portion of the first portion 31 of the linear member 3 by the sandwiching portion 71F.

<Modification of Fourth Embodiment>
The first through hole 71E may extend in the extending direction from the center of the fitting bottom surface 75B of the fitting portion 75 toward the recess bottom surface 72B of the third recess 72. The first opening 711 may be provided at the center of the recess bottom surface 72B. The first portion 31 of the linear member 3 may extend in the extending direction through the first through hole 71E. The protrusion 3A of the linear member 3 may extend from the first opening 711 toward the opening 713 provided on the recess side surface 72A in a direction inclined with respect to the extending direction. For example, as shown in FIG. 11, the first through hole 71E may be formed inside the main body 71 from the center of the fitting bottom surface 75B to the first opening 711 of the concave side surface 72A. The first through hole 71E may extend inside the main body 71 from the center of the fitting bottom surface 75B to the first opening 711 of the concave side surface 72A.

Claims (15)

A cylindrical guide member extending in the extending direction between the proximal end and the distal end;
Inside the guide member, a linear member that is movably inserted along the extending direction;
A connecting member provided on the distal end side of the guide member,
A through hole through which a part of the linear member is inserted, the first through hole having a first opening from which the tip side of the linear member protrudes; and
A support portion that removably supports an end portion on the distal end side of the linear member, wherein the end of the linear member on the distal end side according to the movement of the linear member to the proximal end side A connecting member having a support part that can be switched from a support state supporting a part to a detached state in which the end of the linear member is detached.
An indwelling member having an annular portion through which a projecting portion projecting from the first opening of the linear member is inserted;
A medical device, wherein the medical device is connected to the connecting member in the supporting state and is detached from the connecting member in the detached state. The medical device according to claim 1, wherein the support portion includes a holding portion that holds the end portion on the distal end side of the linear member. The connecting member has a first recess recessed toward the base end side at an end portion on the distal end side,
The first recess has a bottom surface that is a surface that intersects the extending direction, and a side surface that is a surface parallel to the extending direction,
The first opening is provided on the bottom surface of the first recess,
The medical device according to claim 2, wherein the support portion is provided on the side surface of the first recess. The medical device according to claim 1, wherein the first opening and the support portion are arranged side by side in the extending direction. The connecting member has a second recess recessed in a direction intersecting the extending direction on a surface extending along the extending direction,
The second recess has a side surface that is a surface intersecting with the extending direction,
The medical device according to claim 4, wherein the first opening and the support portion are provided on the side surface of the second recess. The connecting member further includes a second through hole that penetrates between the end portion on the distal end side and the side surface of the second recess, and through which the annular portion of the indwelling member is inserted. The medical device according to claim 5. The linear member includes a closing member that closes the second opening opposite to the first opening in the first through hole,
The closing member is
The switchable state between the state in which the linear member is held in the second opening and the state in which the linear member is not held in the second opening is provided. Medical equipment. The hardness of the 1st part supported by the said support part at least of the said linear member is harder than the hardness of the 2nd part except the said 1st part. Medical equipment. The medical device according to any one of claims 1 to 8, wherein the protruding portion of the linear member extends along the extending direction. The connecting member includes a first connecting member and a second connecting member that can contact and separate from each other,
The support part is
The medical device according to claim 1, wherein an end portion on the distal end side of the linear member is clamped at a portion where the first connecting member and the second connecting member are in contact with each other. The second connecting member has a third recessed portion that is recessed toward the proximal end side at an end portion on the distal end side,
The third recess has a bottom surface that is a surface intersecting the stretching direction, and a side surface that is a surface parallel to the stretching direction,
The medical device according to claim 10, wherein the first opening is provided on the bottom surface or the side surface of the third recess. The medical device according to claim 10 or 11, further comprising a holding portion that holds a portion of the linear member that is proximal to the protruding portion on the first connecting member so as not to move. The one of the first connecting member and the second connecting member has a fitting portion into which the other of the first connecting member and the second connecting member fits. Medical equipment. 14. The medical device according to claim 1, wherein the protruding portion of the linear member extends along a direction orthogonal to the extending direction. The medical device according to any one of claims 1 to 14, wherein a maximum outer diameter of the connecting member is larger than an inner diameter of the guide member.

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