JP4877547B2 - Cardiac catheter - Google Patents

Description

  The present invention relates to a cardiac catheter.

A cardiac catheter inserted into a heart from a blood vessel needs to guide a tip electrode provided at the tip of a flexible elongated catheter body to a target site in the heart. In view of this, the distal end of the catheter body can be bent by pulling the operation wire inserted into the catheter body with the operation handle on the hand side.
Therefore, the catheter body holding handle connected to the proximal end of the catheter body and the operation wire holding handle connected to the proximal end of the operation wire are arranged on the operation handle portion of the cardiac catheter so as to be relatively slidable. (For example, Patent Documents 1, 2, 3, and 4).
JP 2004-167248 A JP 2003-319915 A Japanese National Patent Publication No. 10-507678 Japanese Patent Laid-Open No. 7-80077

  The operating handle of the cardiac catheter has a maximum operating wire, with the operating wire being not pulled at all and the tip of the catheter body being straight, within the relative sliding range of the catheter main body holding handle and the operating wire holding handle. A state where the vicinity of the distal end of the catheter main body is bent to the maximum by being pulled to the limit and an arbitrary state in the middle thereof can be obtained.

  However, when the cardiac catheter is used repeatedly, the operation wire gradually extends. Therefore, even if the operation of sliding both the holding handles relatively is not started, the vicinity of the distal end of the catheter body does not easily start bending, and both holding handles are relatively maximum. Even if the sliding operation is performed to the limit, the vicinity of the distal end of the catheter body may not be bent to the maximum extent. In addition, such a phenomenon may occur even if the manufacturing process is insufficiently adjusted.

In such a case, in the conventional cardiac catheter, it is necessary to disassemble the operation handle portion and adjust the connection position of the operation wire with respect to the operation wire holding handle, so that it is difficult for the user to perform such work. In addition, it was very troublesome to perform readjustment in the manufacturing process.
The present invention has been made to solve such a problem, and without disassembling the operation handle portion, the catheter body holding handle to which the catheter body is connected and the operation wire holding handle to which the operation wire is connected. An object of the present invention is to provide a cardiac catheter in which anyone can easily perform relative position adjustment.

  The present invention relates to an elongated catheter body having flexibility, an operation wire inserted into the catheter body and having a distal end connected to the distal end side of the catheter body, and a base of the operation wire formed in a substantially cylindrical shape. An operation wire holding handle connected to the end side, and a substantially cylindrical portion, a part of which is inserted into the operation wire holding handle, and is relatively slidable in the axial direction of the operation wire holding handle; A catheter main body holding handle connected to the proximal end side of the catheter main body, and by relatively sliding the catheter main body holding handle and the operation wire holding handle, the operation wire in the catheter main body is connected to the shaft. In the cardiac catheter configured to slide in the direction and bend the vicinity of the distal end of the catheter body, In the state where the catheter main body holding handle and the operation wire holding handle are not relatively moved, the catheter main body holding handle is provided with adjusting means for adjusting the connection position of the catheter main body with respect to the catheter holding handle from the outside. A rotation screw member that can be rotated around the axis of the handle, does not move in the axial direction, and is arranged so that a part protrudes from the inside of the catheter body holding handle; and a proximal end of the catheter body The slide screw member, which is fixed so that it is slidable in the axial direction and is not rotated around the axis, is screwed together, and the slide screw member is rotated by rotating the rotary screw member. The catheter body fixed to the slide screw member by sliding in the axial direction is That is configured to move the first characterized with respect to catheters body holding the handle.

  In the cardiac catheter according to the first aspect of the present invention, the anti-bending member that elastically covers the vicinity of the catheter main body that protrudes from the catheter main body holding handle toward the distal end of the catheter main body is the rotation operation screw. A second feature is that the member is detachably connected to the member.

  Further, the present invention provides a flexible elongated catheter body, an operation wire inserted into the catheter body and having a distal end connected to the distal end side of the catheter body, and an inner diameter formed in a substantially cylindrical shape. An operation wire holding handle connected to the proximal end side of the operation wire and a substantially cylindrical portion, a part of which is inserted into the operation wire holding handle, and slides relatively in the axial direction of the operation wire holding handle A catheter body holding handle that is freely connected to the proximal end side of the catheter body, and the catheter body holding handle and the operation wire holding handle are relatively slid to operate the catheter body. A cardiac catheter configured such that a wire slides in the axial direction and a portion near the distal end of the catheter body is bent. In the state in which the catheter main body holding handle and the operation wire holding handle are not relatively moved, an adjustment means for adjusting the connection position of the operation wire with respect to the operation wire holding handle from the outside is provided. A rotary operation screw member arranged so as to be able to rotate around the axis of the operation wire holding handle and not to move in the axial direction, and to partially protrude from the inside of the operation wire holding handle; When the base end side of the wire is fixed and is slidable in the axial direction thereof and is screwed with a slide screw member arranged so as not to rotate around the axis, the slide member is rotated by rotating the rotary operation screw member. The operation wire fixed to the slide screw member by sliding the screw member in the axial direction The a third feature in that it is configured to move relative to said operating wire holding handle.

  Furthermore, the present invention is characterized in that, in the cardiac catheter according to any one of the above characteristics, an operation wheel capable of rotating the rotation operation screw member is connected to the rotation operation screw member. In the cardiac catheter of any one of the features, a rotation operation member in which a guide groove is formed in a spiral shape around an axis is used instead of the rotation operation screw member, and the guide groove is replaced with the slide screw member. A fifth feature is that a slide member formed with engaging pin-like protrusions is used.

According to the cardiac catheter of the present invention, in a state in which the catheter main body holding handle and the operation wire holding handle are not relatively moved, the adjusting means for screwing the rotary operation screw member and the slide screw member to the catheter main body holding handle Since the connection position of the catheter body or the connection position of the operation wire with respect to the operation wire holding handle can be adjusted from the outside , the catheter body holding handle and the operation wire to which the catheter body is connected can be obtained without disassembling the operation handle portion. Anyone can easily adjust the relative position of the connected operation wire holding handle.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 5 shows the overall configuration of the cardiac catheter. An elongated catheter body 1 having flexibility is passed through a blood vessel, and is formed of a multi-lumen tube made of a synthetic resin material or the like. The bending portion 2 formed in the vicinity of the distal end of the catheter body 1 is formed more flexibly, and the distal electrode portion 3 is connected to the distal end. 4 is an operation wire inserted into the catheter body 1 for bending the bending portion 2, and its distal end is displaced to the periphery of the distal end portion (or a position closer to the distal end thereof) of the bending portion 2. It is linked to the position.

  An operation handle portion 5 provided on the proximal side of the cardiac catheter is operated by a catheter body holding handle 6 connected to the proximal end of the catheter body 1 and an operation wire holding handle 7 connected to the proximal end of the operation wire 4. The wire 4 is arranged so as to be relatively slidable in the axial direction. The operation wire holding handle 7 is formed in a substantially cylindrical shape suitable for a user to grasp with the hand, and the catheter body holding handle 6 is easily pushed and pulled by the thumb of the hand holding the operation wire holding handle 7. Thus, it is formed in a thick and substantially disk shape, and is arranged in a state of projecting forward (downward in FIG. 5) from the vicinity of the tip of the operation wire holding handle 7.

  Reference numeral 8 denotes a slide cylinder portion formed integrally with the catheter body holding handle 6, and is slidably fitted in the operation wire holding handle 7. Reference numeral 9 denotes a wire clamp fixed to the proximal end of the operation wire 4, which is disposed near the central axis position of the operation wire holding handle 7 and fixed to the operation wire holding handle 7. Reference numeral 10 denotes a bend-preventing member for preventing the proximal end portion of the catheter body 1 from being bent suddenly in the vicinity of the connection portion with the catheter body holding handle 6, and is tapered by a resilient rubber material or the like. And is arranged adjacent to the catheter body holding handle 6 and surrounding the proximal end portion of the catheter body 1.

  FIG. 6 shows a state in which the bending portion 2 is bent by remote operation from the operation handle portion 5, and the operation wire holding handle 7 is pulled backward (upward) with respect to the catheter body holding handle 6 (operation wire). When viewed from the side of the holding handle 7, the operation wire 4 is pulled backward with respect to the catheter body 1 by bending the catheter body holding handle 6 forward (downward), and the bending portion 2 is bent. And if operation opposite to it is performed, the bending part 2 will return to the straight state shown by FIG. In this manner, in the operation handle portion 5, the bending portion 2 is bent by an arbitrary angle by relatively sliding the catheter body holding handle 6 and the operation wire holding handle 7 in the axial direction of the operation wire 4. be able to.

  FIG. 2 shows the front half of the operation handle portion 5. In addition, each member illustrated as one component in each of the following drawings including FIG. 2 is a function not easily related to the contents of the present invention, for facilitating the manufacture of the component, for easy assembly. In order to achieve the above, etc., each can be divided into a plurality of parts, and even if configured in this way, it does not change within the scope of the present invention.

  Reference numeral 12 denotes a slide screw member (connection position interval adjusting means) in which the proximal end portion of the catheter body 1 is inserted and firmly fixed with an adhesive or the like, and a male screw is formed on the outer peripheral surface of the distal portion thereof. Then, the operation wire 4 extends straight into the slide cylinder portion 8 from the wire passage hole 13 formed at the proximal end of the slide screw member 12. 14 is a lead wire that is passed through the catheter body 1 separately from the operation wire 4 and connected to each electrode of the distal electrode portion 3, along with the operation wire 4 from the wire passage hole 13 into the slide cylinder portion 8. It is growing.

  FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and the wire clasp 9 fixed to the base end of the operation wire 4 by soldering or the like is the inner peripheral surface of the operation wire holding handle 7. It is fixed to the flat wire fixing plate 15 fitted and fixed in the groove formed by crimping or soldering. Therefore, the operation wire 4 is fixed so as not to move to the axial position of the operation wire holding handle 7 via the wire fixing plate 15. In FIG. 3, the lead wires 14 and the like are not shown.

  FIG. 4 is a cross-sectional view taken along line BB in FIG. 2, and an intermediate portion of the slide screw member 12 is loosely fitted into the inner peripheral portion of the slide tube portion 8 in a cylindrical shape. The protrusions 17 projecting outward from the two 180 ° symmetrical positions are loosely fitted with the linear grooves 16 formed in the key groove shape parallel to the axial direction on the inner peripheral surface of the slide cylinder portion 8. Are combined. As a result, the slide screw member 12 is slidable in the axial direction and does not rotate around the axis. In FIG. 4, illustration of the catheter body 1, the operation wire 4 and the lead wire 14 that are passed through the catheter body 1, and the like are omitted.

  Returning to FIG. 2, reference numeral 18 denotes a substantially cylindrical rotational operation screw member (connection position interval adjusting means) in which a female screw portion that engages with the male screw portion of the slide screw member 12 is formed in the rear half. S is the threaded portion. A hook-like part 19 is formed on the outer peripheral part of the intermediate part of the rotary operation screw member 18 so that the hook-like part 19 does not move forward by a retaining nut 20 screwed and fixed to the catheter body holding handle 6. Is regulated. As a result, the rotation operation screw member 18 is held by the catheter body holding handle 6 in a state where it can rotate around the axis relative to the catheter body holding handle 6 and does not move in the axial direction.

  The most distal end portion of the rotational operation screw member 18 protrudes forward from the distal end of the catheter body holding handle 6. Reference numeral 18a denotes a tip protruding portion, which can be independently rotated from the outside of the catheter body holding handle 6. However, in this embodiment, the folding member 10 is detachably attached to the tip protruding portion 18a of the rotational operation screw member 18, and the rotational operation screw member is rotated by rotating the folding member 10 around the axis. 18 can be rotated.

  Reference numeral 22 denotes an engaging portion for detachably engaging the anti-bending member 10 so that the anti-bending member 10 does not come out of the rotational operation screw member 18, and an inward protrusion formed on the entire inner surface of the rear end portion of the anti-bending member 10. Is engaged with a groove formed on the entire outer surface of the rotary operation screw member 18, and the anti-bending member 10 can be elastically deformed to be attached to and detached from the tip protruding portion 18 a of the rotary operation screw member 18. However, you may make it detachably engage using another structure.

  In the cardiac catheter of the embodiment configured as described above, when the operation wire 4 is loosened due to repeated use or insufficient adjustment at the time of manufacture, as shown in FIG. Is gripped with a fingertip, and the rotation operation screw member 18 is rotated around the axis. Then, since the slide screw member 12 screwed with the rotary operation screw member 18 moves in the axial direction without rotating around the axis, the proximal end of the catheter body 1 fixed to the slide screw member 12 is the catheter body holding handle 6. Move against.

  As a result, in a state where the catheter body holding handle 6 and the operation wire holding handle 7 are not relatively moved, the connection position of the catheter body holding handle 6 with respect to the proximal end of the catheter body 1 and the operation wire holding with respect to the proximal end of the operation wire 4 Extending the distance L between the connecting position of the handle 7 to an arbitrary length at which the operation wire 4 is not loosened by a simple operation from the outside of the holding handles 6, 7, and bending the bending portion 2 normally. Can be ready.

  In addition, you may make it the structure which press-fixes the rotation operation screw member 18 so that it cannot rotate with respect to the catheter main body holding handle 6 by tightening the retaining nut 20 tightly after such adjustment. In order to easily tighten the retaining nut 20 or loosen it for subsequent readjustment, a tool engagement hole 21 is formed on the end surface of the retaining nut 20 so as to be exposed outside the outer surface of the folding member 10. In this case, the retaining nut 20 can be rotated by a slight angle so that the rotation operation screw member 18 can be locked and unlocked with respect to the catheter body holding handle 6.

FIG. 7 shows a second embodiment of the present invention, in which the anti-bending member 10 is elastically deformed and removed from the tip protruding portion 18a of the rotation operation screw member 18, and the tip protrusion 18a of the rotation operation screw member 18 is removed. The proximal end connection position of the catheter body 1 with respect to the catheter body holding handle 6 can be adjusted by directly picking and rotating the fingertip with a fingertip.
FIG. 8 shows a third embodiment of the present invention. An operation wheel 28 capable of rotating the rotation operation screw member 18 is connected to the rotation operation screw member 18 outside the catheter body holding handle 6. Then, by fixing the state with a fixing screw 29 or the like and rotating the operation wheel 28, the rotation operation screw member 18 is rotated so that the proximal end connection position of the catheter body 1 with respect to the catheter body holding handle 6 can be adjusted. It is a thing. In this way, since the operation wheel 28 can be easily rotated even during use of the cardiac catheter, the bending portion 2 can be bent in accordance with the anatomical shape or the like of the use target site of the cardiac catheter. Can be used while adjusting the state.

  FIG. 9 shows a fourth embodiment of the present invention, in which a cylindrical guide cylinder 8 ′ corresponding to the slide cylinder 8 of each of the above embodiments is integrated with the distal end side of the operation wire holding handle 7. The catheter main body holding handle 6 is slidably disposed along the outer peripheral surface of the guide cylinder 8 '. And the bending prevention member 10 is attached to the most distal part of the guide cylinder 8 '. Other configurations are substantially the same as the third embodiment described above, except for the shape of each component. The fixing structure of the operation wire 4 with respect to the operation wire holding handle 7 is the same as in the first to third embodiments.

  In the guide cylinder 8 ', a pair of slits 31 are formed at the 180 [deg.] Symmetrical position straight in the longitudinal direction to the forefront. The slide screw member 12 ′ to which the proximal end of the catheter body 1 is fixed is formed in a plate shape, and a male screw is formed on the outer peripheral surface of the distal end of the distal portion, and is slidably engaged between the slits 31. is doing. Further, as shown in FIG. 10 which is a cross-sectional view taken along the line C-C, the protrusion 17 ′ at the rear portion of the slide screw member 12 ′ is the inner peripheral surface of the catheter body holding handle 6. The slide screw member 12 'and the catheter main body holding handle 6 are both slidable in the axial direction and rotated about the axis, loosely fitted in a linear groove 16' formed in a key groove shape parallel to the axial direction. It is supposed not to.

  Reference numeral 18 ′ shown in FIG. 9 is a substantially cylindrical rotary operation screw member that engages with the catheter body holding handle 6 while being rotatable around its axis but restricted in relative movement in the axial direction. Yes, it can rotate and slide along the outer peripheral surface of the guide cylinder 8 '. As shown in FIG. 11 which is a cross-sectional view taken along the line D-D, the internal thread portion formed on the inner peripheral surface of the rotary operation screw member 18 ′ is replaced with the external thread portion of the slide screw member 12 ′. It is screwed. S is the threaded portion. As shown in FIG. 9, the operation wheel 28 is integrally fixed to the outer peripheral portion of the rotation operation screw member 18 ′ with a fixing screw 29. Reference numeral 32 denotes an exterior cover of the front portion of the rotary operation screw member 18 ′, and 33 denotes an exterior cover of the front portion of the slit 31.

  In the embodiment configured as described above, as shown in FIG. 9, the catheter body holding handle 6 and the operation wire holding handle 7 are slid relatively in the axial direction to form the catheter body holding handle 6. On the other hand, by pulling the operation wire holding handle 7 backward (upward) (pushing the catheter body holding handle 6 forward (downward when viewed from the operation wire holding handle 7 side), the catheter body 1 is operated. When the operation wire 4 is pulled backward to bend the bending portion 2 and the reverse operation is performed, the bending portion 2 returns to a straight state indicated by a two-dot chain line.

  Then, as shown in FIG. 12, when the operation wheel 28 is rotated and the rotation operation screw member 18 'is rotated about the axis, the slide screw member 12' screwed with the rotation operation screw member 18 'is rotated about the axis. Therefore, the proximal end of the catheter body 1 fixed to the slide screw member 12 ′ moves with respect to the catheter body holding handle 6, as in the first to third embodiments. In the state where the catheter body holding handle 6 and the operation wire holding handle 7 are not moved relatively, the connection position of the catheter body holding handle 6 with respect to the proximal end of the catheter body 1 and the operation wire holding handle with respect to the proximal end of the operation wire 4 7 is an arbitrary length at which the operation wire 4 is not loosened by a simple operation from the outside of the holding handles 6 and 7. Stretched, the curved portion 2 can be ready to be correctly bent.

  FIG. 13 shows a fifth embodiment of the present invention, which is an operation handle portion 5 having substantially the same structure as that of the fourth embodiment, but the operation of the catheter body holding handle 6 of the fourth embodiment and the operation thereof. The cylindrical body that the user holds and holds the wire holding handle 7 in reverse is the catheter body holding handle 7 ', and the thumb of the hand holding the catheter body holding handle 7' A thick, substantially disk-shaped body that is easy to push and pull is an operation wire holding handle 6 '. The guide cylinder 8 'is formed integrally with the distal end portion of the catheter body holding handle 7', and the operation wire holding handle 6 'slides in the front-rear direction on the outer periphery thereof.

The proximal end of the catheter main body 1 is fixed to the catheter main body fixing member 34 fixedly attached to the most distal end portion of such a guide tube body 8 ', and the slide screw member 12 having the same configuration as that of the fourth embodiment. The base end of the operation wire 4 is fixed to '. Since the other configuration is the same as that of the fourth embodiment, the same reference numerals as those of the fourth embodiment are given and description thereof is omitted.
In the embodiment configured in this manner, as shown in FIG. 13, the operation wire holding handle 6 ′ and the catheter body holding handle 7 ′ are slid relative to each other in the axial direction, thereby the catheter body holding handle. By pulling the operation wire holding handle 6 'backward (upward) with respect to 7' (pushing the catheter body holding handle 7 'forward (downward when viewed from the operation wire holding handle 6' side), When the operation wire 4 is pulled backward with respect to the catheter body 1 and the bending portion 2 is bent, and the opposite operation is performed, the bending portion 2 returns to a straight state indicated by a two-dot chain line.

  Then, as shown in FIG. 14, when the operation wheel 28 is rotated to rotate the rotation operation screw member 18 'about the axis, the slide screw member 12' screwed with the rotation operation screw member 18 'is rotated about the axis. Therefore, the proximal end of the operation wire 4 fixed to the slide screw member 12 ′ moves with respect to the operation wire holding handle 6 ′, and the catheter body holding handle 7 ′ and the operation wire holding are held. In a state in which the handle 6 ′ is not moved relatively, between the connection position of the catheter body holding handle 7 ′ with respect to the proximal end of the catheter body 1 and the connection position of the operation wire holding handle 6 ′ with respect to the proximal end of the operation wire 4. The bending portion 2 is extended by extending the distance L to an arbitrary length at which the operation wire 4 is not loosened by a simple operation from the outside of the holding handles 6 'and 7'. It can be ready to be correctly bent.

The present invention is not limited to the above-described embodiments. For example, the rotation operation screw members 18 and 18 ′ may be rotated from the outside by an operation member other than the operation wheel 28. .
Further, as shown in FIG. 15, the engagement between the rotary operation screw member 18 'and the slide screw member 12' is replaced with the screw engagement of the female screw and the male screw, and the guide groove 41 formed in a spiral around the axis. And the engagement with the pin-like protrusion 42 that engages with the guide groove 41. In this case, it is appropriate to refer to the reference numeral 18 'as a "rotating operation member" and the reference numeral 12' as a "slide member".

The side sectional view of the state after adjustment operation of the cardiac catheter of the 1st embodiment of the present invention. 1 is a side sectional view of a cardiac catheter according to a first embodiment of the present invention. Sectional drawing of the state cut | disconnected by the AA in FIG. 2 of the 1st Embodiment of this invention. Sectional drawing of the state cut | disconnected by the BB line in FIG. 2 of the 1st Embodiment of this invention. 1 is an external view showing the overall configuration of a cardiac catheter according to a first embodiment of the present invention. The external view of the state in which operation which bends the bending part of the cardiac catheter of the 1st Embodiment of this invention was performed. Side surface sectional drawing of the state after adjustment operation of the cardiac catheter of the 2nd Embodiment of this invention. Side surface sectional drawing of the state after adjustment operation of the cardiac catheter of the 3rd Embodiment of this invention. Side surface sectional drawing of the cardiac catheter of the 4th Embodiment of this invention. Sectional drawing of the state cut | disconnected by CC line in FIG. 9 of the 4th Embodiment of this invention. Sectional drawing of the state cut | disconnected by the DD line | wire in FIG. 9 of the 4th Embodiment of this invention. Side surface sectional drawing of the state after adjustment operation of the cardiac catheter of the 4th Embodiment of this invention. Side surface sectional drawing of the cardiac catheter of the 5th Embodiment of this invention. Side surface sectional drawing of the state after adjustment operation of the cardiac catheter of the 5th Embodiment of this invention. Side surface sectional drawing of the cardiac catheter of the 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Catheter main body 2 ... Bending part 4 ... Operation wire 5 ... Operation handle part 6, 7 '... Catheter main body holding handle 7, 6' ... Operation wire holding handle 8 ... Slide cylinder part 8 '... Guide cylinder 10 ... Anti-bending Member 12, 12 '... slide screw member (connection position interval adjusting means)
16, 16 '... linear grooves 17, 17' ... projections 18, 18 '... rotation operation screw member (connection position interval adjusting means)
18a ... projecting tip 20 ... retaining nut 28 ... operating wheel 31 ... slit 41 ... guide groove 42 ... pin-like projection L ... spacing S ... screwing part

Claims (5)

An elongated catheter body having flexibility, an operation wire inserted into the catheter body and having a distal end connected to the distal end side of the catheter body, and formed in a substantially cylindrical shape and connected to the proximal end side of the inserted operation wire An operation wire holding handle and a substantially cylindrical portion, a part of which is inserted into the operation wire holding handle, and is relatively slidable in the axial direction of the operation wire holding handle. A catheter body holding handle connected to the end side, and by relatively sliding the catheter body holding handle and the operation wire holding handle, the operation wire in the catheter body slides in the axial direction. In the cardiac catheter configured such that the portion near the distal end of the catheter body is bent,
In a state where the catheter body holding handle and the operation wire holding handle are not relatively moved, an adjustment means for adjusting the connection position of the catheter body with respect to the catheter holding handle from the outside,
Rotation operation screw member in which the adjusting means is arranged so that it can be rotated around the axis of the catheter holding handle and does not move in the axial direction, and a part thereof protrudes from the inside of the catheter main body holding handle. And a slide screw member arranged so that the proximal end side of the catheter body is fixed and is slidable in the axial direction and does not rotate around the axis, and the rotation operation screw member is rotated. The cardiac catheter is configured to slide the slide screw member in the axial direction to move the catheter body fixed to the slide screw member with respect to the catheter body holding handle . 2. The cardiac catheter according to claim 1, wherein an anti-bending member that elastically covers the vicinity of the catheter main body protruding from the catheter main body holding handle toward the distal end of the catheter main body is detachable from the rotation operation screw member. A connected cardiac catheter. A flexible elongated catheter body, an operation wire inserted into the catheter body and having a distal end connected to the distal end side of the catheter body, and a proximal end side of the inserted operation wire having an inner diameter formed in a substantially cylindrical shape An operation wire holding handle connected to the catheter body, a substantially cylindrical portion, a portion of which is inserted into the operation wire holding handle, and is relatively slidable in the axial direction of the operation wire holding handle. A catheter body holding handle coupled to the proximal end of the catheter body, and by relatively sliding the catheter body holding handle and the operation wire holding handle, the operation wire in the catheter body is moved in the axial direction. In a cardiac catheter configured to slide and bend a portion near the distal end of the catheter body,
In a state where the catheter main body holding handle and the operation wire holding handle are not moved relatively, an adjustment means for adjusting the connection position of the operation wire with respect to the operation wire holding handle from the outside,
Rotation operation screw arranged so that the adjustment means can be rotated around the axis of the operation wire holding handle and does not move in the axial direction, and a part thereof protrudes from the inside of the operation wire holding handle A member and a slide screw member, which is fixed so that the proximal end side of the operation wire is slidable in the axial direction and is not rotated around the axis, are screwed together to rotate the rotation operation screw member. Thus, the cardiac catheter configured to slide the slide screw member in the axial direction to move the operation wire fixed to the slide screw member with respect to the operation wire holding handle . The cardiac catheter according to any one of claims 1 to 3 , wherein an operation wheel capable of rotating the rotation operation screw member is connected to the rotation operation screw member. The cardiac catheter according to any one of claims 1 to 4 , wherein instead of the rotation operation screw member, a rotation operation member having a guide groove formed in a spiral around an axis is used, and the slide screw member is used. Instead, a cardiac catheter in which a slide member in which a pin-like protrusion that engages with the guide groove is formed is used.

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