CN219595558U - Adjustable bending interventional device for heart failure auxiliary treatment - Google Patents

Abstract

The utility model provides an adjustable bending interventional device for heart failure auxiliary treatment, and relates to the field of interventional medical instruments. The bendable interventional device comprises an operating handle, a catheter connected with the operating handle, an injection needle assembly arranged in the catheter, a rotating piece and a clamping piece arranged on the operating handle; the injection needle assembly comprises a connecting pipe and an injection needle arranged at one end of the connecting pipe, and the injection needle can extend out of the pipe orifice of the catheter or retract from the pipe orifice; the guide pipe is internally provided with a first wire drawing and a second wire drawing, one ends of the first wire drawing and the second wire drawing are connected with one end of the guide pipe far away from the operating handle, the other ends of the first wire drawing and the second wire drawing are wound on the rotating piece, and the first wire drawing and the second wire drawing are respectively retracted and released when the rotating piece rotates; the first wire drawing and the second wire drawing are oppositely arranged at two sides of the axis of the catheter. A clamping groove is formed in one side face of the rotating piece, the center of the clamping groove is located on the rotating axis of the rotating piece, and the clamping piece can slide along the rotating axis direction of the rotating piece and is clamped in the clamping groove to prevent the rotating piece from rotating. Which is capable of adjusting the bending of the catheter in a plurality of directions.

Description

Adjustable bending interventional device for heart failure auxiliary treatment

Technical Field

The utility model relates to the technical field of interventional medical instruments, in particular to an adjustable bending interventional device for heart failure auxiliary treatment.

Background

In heart treatment surgery, interventional instruments are often used to deliver catheters into the interior of the human body, to puncture the heart, or to inject some therapeutic drugs into the heart. The interventional instrument needs to penetrate through the arterial blood vessel of the heart to puncture and inject the heart, and multi-directional bending operation is needed in many cases. The existing interventional instrument is connected with the catheter by adopting one traction wire, and the catheter is bent by operating the traction wire. However, this structure can only adjust the bending of the catheter in one direction, and the flexibility is not good enough.

Disclosure of Invention

The utility model provides a bending-adjustable interventional device for heart failure auxiliary treatment, which can adjust the bending of a catheter to a plurality of directions.

The utility model is realized in the following way:

the utility model provides an adjustable bending interventional device for heart failure auxiliary treatment, which comprises: the catheter comprises an operation handle, a catheter connected with the operation handle, an injection needle assembly arranged in the catheter, a rotating piece and a clamping piece arranged on the operation handle;

the injection needle assembly comprises a connecting pipe and an injection needle arranged at one end of the connecting pipe, and the injection needle can extend out of the pipe orifice of the catheter or retract from the pipe orifice;

the guide tube is internally provided with a plurality of wiredrawing, the wiredrawing comprises a first wiredrawing and a second wiredrawing, one ends of the first wiredrawing and the second wiredrawing are connected with one end, far away from the operating handle, of the guide tube, and the first wiredrawing and the second wiredrawing are oppositely arranged on two sides of the axis of the guide tube; the other ends of the first wire drawing and the second wire drawing are wound on the rotating piece, and the first wire drawing and the second wire drawing are respectively retracted and released when the rotating piece rotates;

the clamping groove is formed in one side face of the rotating piece, the center of the clamping groove is located on the rotating axis of the rotating piece, and the clamping piece can slide along the rotating axis direction of the rotating piece and is clamped in the clamping groove to prevent the rotating piece from rotating.

In one possible embodiment, the rotating member includes a rotating disc and a driving rod coaxially disposed with a rotation axis of the rotating disc, the driving rod is connected to the rotating disc and penetrates through the operating handle, and the driving rod and the locking member are disposed on two sides of the rotating disc, which are opposite to each other.

In one possible embodiment, the cross section of the clamping groove is circular, the clamping piece comprises a first section and a second section which are connected, the first section can be clamped in the clamping groove, and the second section can slide along the rotation axis direction of the rotating piece and is limited to rotate.

In one possible embodiment, the first section has a circular cross section, the outer diameter of the first section is equal to the inner diameter of the clamping groove, and the second section has a square cross section.

In one possible embodiment, the side walls of the card slot have a soft rubber layer.

In one possible embodiment, the rotating disc is provided with a first limit groove and a second limit groove which are arranged at intervals, the first wire drawing is wound on the first limit groove, the second wire drawing is wound on the second limit groove, and winding directions of the first wire drawing and the second wire drawing are opposite.

In one possible embodiment, the rotating disc comprises a connecting body, a disc body and a connecting rod, wherein the connecting body is arranged at intervals with the disc body, and the disc body is circumferentially arranged along the connecting body; the connecting main body is connected with the disc main body through a plurality of connecting rods, the connecting rods are arranged at intervals along the circumferential direction of the connecting main body, and the clamping grooves are formed in the connecting main body; the first limiting groove and the second limiting groove are formed in the disc main body, a connecting through hole is formed in the disc main body along the thickness direction of the disc main body, and the first wire drawing and the second wire drawing penetrate through the connecting through hole and one end portion of the first wire drawing and the second wire drawing is fixed to one side, close to the connecting rod, of the connecting through hole.

In a possible implementation manner, the first limiting groove and the second limiting groove are respectively provided with a connecting through hole correspondingly, the first wire drawing is arranged in the connecting through holes correspondingly arranged in the first limiting groove in a penetrating mode, and the second wire drawing is arranged in the connecting through holes correspondingly arranged in the second limiting groove in a penetrating mode.

In one possible embodiment, the catheter comprises an inner tube and an outer tube, the drawn portion being located between the inner tube and the outer tube, the injection needle being located within the inner tube.

In one possible embodiment, the end of the catheter remote from the handle is flared.

The utility model has at least the following beneficial effects:

the bendable interventional device for heart failure auxiliary treatment can convey the injection needle assembly into a human body through the catheter, and the injection needle extends out of the orifice of the catheter to puncture and inject heart tissues. Wherein, first wire drawing and second wire drawing receive respectively and receive and put when rotating the piece, then first wire drawing receive and the second wire drawing is put when, and the pipe is crooked to first wire drawing one side, and first wire drawing is put and the second wire drawing is when, and the pipe is crooked to second wire drawing one side. In addition, because the first wire drawing and the second wire drawing are oppositely arranged on two sides of the axis of the catheter, the first wire drawing and the second wire drawing are respectively retracted and released when the rotating piece rotates, the resistance of the wire drawing to the bending of the catheter during bending is avoided, and the bending is more convenient during bending. The clamping piece is clamped in the clamping groove and can prevent the rotating piece from rotating, so that the bending degree of the guide pipe can be controlled. And the center of draw-in groove is located the axis of rotation of rotating the piece, and when rotating the piece and rotating arbitrary angle, the homoenergetic prevents rotating the piece with rotating after the card slot cooperation, then the precision of regulation and control is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a bendable interventional device for heart failure assisted treatment according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of a rotating member at a first view angle according to an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a locking member according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a catheter bend adjusting structure according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a rotating member at a second view angle according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a catheter according to an embodiment of the present utility model.

Icon: 10-an adjustable bend interventional device; 11-an operation handle; 12-a catheter; 121-a tube orifice; 122-an inner tube; 123-an outer tube; 13-an injection needle assembly; 131-connecting pipes; 132-an injection needle; 14-a rotating member; 141-a clamping groove; 1411-a soft rubber layer; 142-rotating a disc; 1421-connecting the body; 1422-a disk body; 1423-connecting rod; 1424-connecting vias; 1425-first limit groove; 1426-a second limit groove; 143-a drive rod; 1431-groove; 15-a clamping piece; 151-first section; 152-a second section; 161-first wiredrawing; 162-second wiredrawing.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the present utility model, it should be noted that the terms "first," "second," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In addition, "a plurality of" in the present utility model means two or more.

Examples

The present embodiment provides an adjustable interventional device 10 for heart failure assisted therapy, please refer to fig. 1, which includes an operation handle 11, a catheter 12, an injection needle assembly 13, a rotating member 14 and a locking member 15.

The operating handle 11 is of a shell structure, an installation channel is formed in the operating handle 11, the guide pipe 12 is connected with the operating handle 11, the rotating piece 14 is installed on the operating handle 11 and can rotate relative to the operating handle 11, and the rotating axis of the rotating piece 14 is perpendicular to or oblique to the axis of the guide pipe 12. The injection needle assembly 13 is disposed in the catheter 12, the injection needle assembly 13 includes a connection tube 131 and an injection needle 132 mounted at one end of the connection tube 131, the injection needle 132 can be extended out of the nozzle 121 of the catheter 12 or retracted from the nozzle 121, and the injection needle 132 can pierce heart tissue when extended out of the nozzle 121 of the catheter 12. Wherein, the movement of the injection needle 132 is optionally realized by driving the connecting tube 131 to move along the axial direction of the catheter 12 by a driving member (not shown in the figure), and the movement of the connecting tube 131 drives the synchronous movement of the injection needle 132. Alternatively, the end of the connection tube 131 remote from the injection needle 132 is connected to an injection tube through which the injection liquid can be delivered into the connection tube 131 and injected into the heart tissue through the injection needle 132. Illustratively, the driving member includes a driving block provided with a clamping groove, the cross section of the clamping groove is circular arc, the circular arc is a major arc (an arc greater than a semicircle), and the groove wall of the clamping groove is provided with a rubber layer, so that the connection pipe 131 can be clamped firmly in the clamping groove. The opposite side walls of the driving block are provided with sliding grooves, the operating handle 11 is provided with a third operating hole, the hole wall of the third operating hole is matched with the sliding grooves of the driving block, and the driving block can move along the axial direction of the operating handle 11 in the third operating hole, so that the connecting pipe 131 is driven to move along the axial direction of the guide pipe 12, and the injection needle 132 is driven to synchronously move. It should be noted that, the structure of the driving member is not particularly limited in the embodiment of the present utility model, so long as the driving member can drive the connecting tube 131 to move along the axial direction of the catheter 12, and the injection is not prevented from being delivered into the connecting tube 131. Alternatively, the injection may be an alginate hydrogel.

Illustratively, the end of the catheter 12 away from the handle 11 is flared, and when the catheter 12 extends into a cardiac artery, the flared orifice 121 is not prone to puncture the inner wall of the artery and heart tissue, and is not prone to damage the heart.

The catheter 12 is internally provided with a plurality of wiredrawing, the wiredrawing comprises a first wiredrawing 161 and a second wiredrawing 162 (refer to fig. 6), one ends of the first wiredrawing 161 and the second wiredrawing 162 are connected with one end of the catheter 12 far away from the operating handle 11, and the first wiredrawing 161 and the second wiredrawing 162 are oppositely arranged at two sides of the axis of the catheter 12; the other ends of the first wire drawing 161 and the second wire drawing 162 are both wound around the rotating member 14, and the first wire drawing 161 and the second wire drawing 162 are respectively retracted and extended when the rotating member 14 rotates. For example, when the rotor 14 rotates clockwise, the first wire 161 is put and the second wire 162 is taken up, and the catheter 12 is bent toward the second wire 162; when the rotating member 14 rotates counterclockwise, the first wire 161 is retracted and the second wire 162 is extended, and the guide tube 12 is bent toward the first wire 161, so that the guide tube 12 can be bent in a plurality of directions, for example, in two directions (see fig. 4). Because the first wire drawing 161 and the second wire drawing 162 are relatively arranged on two sides of the axis of the catheter 12, when the rotating member 14 rotates, the first wire drawing 161 and the second wire drawing 162 are respectively retracted and released, when the rotating member bends towards one side of the first wire drawing 161, the second wire drawing 162 does not cause resistance to the bending of the catheter 12, when the rotating member bends towards one side of the second wire drawing 162, the first wire drawing 161 does not cause resistance to the bending of the catheter 12, and the arrangement avoids the resistance of the wire drawing to the bending of the catheter 12 during bending, and is more convenient during bending.

With continued reference to fig. 1, a side surface of the rotating member 14 is provided with a clamping groove 141, and a center of the clamping groove 141 is located on a rotation axis of the rotating member 14, and the locking member 15 can slide along the rotation axis direction of the rotating member 14 and is clamped in the clamping groove 141, so as to be used for preventing the rotating member 14 from rotating. The side wall of the operating handle 11 has a first operating hole, the locking member 15 slidably penetrates through the first operating hole and can be locked in the locking groove 141, and the locking member 15 is limited by the first operating hole to rotate along the rotation axis.

When the rotating member 14 rotates a certain angle to bend the catheter 12 to a proper degree, the locking member 15 can slide until the locking groove 141 and the locking groove 141 cooperate to prevent the rotating member 14 from rotating, so as to fix the catheter 12 to a proper bending degree, and control the bending degree of the catheter 12. In addition, because the center of the clamping groove 141 is located on the rotation axis of the rotating member 14, when the rotating member 14 rotates by any angle, the clamping member 15 and the clamping groove 141 can be matched to prevent the rotating member 14 from rotating, so that the regulation and control precision is good.

Illustratively, the rotating member 14 includes a rotating disc 142 and a driving rod 143 coaxially disposed with the rotation axis of the rotating disc 142, and the sidewall of the operating handle 11 is provided with a second operating hole, and the driving rod 143 is connected to the rotating disc 142 and penetrates the second operating hole of the operating handle 11. The rotating disc 142 can rotate around the rotating shaft line by rotating the driving rod 143, wherein the driving rod 143 and the clamping piece 15 are arranged on two opposite sides of the rotating disc 142, the driving rod and the clamping piece are not in interference during operation, and the operation is more convenient. Alternatively, the surface of the driving lever 143 has scale marks by which the angle of rotation of the rotating disc 142 can be easily known.

Optionally, the surface of the driving rod 143 is provided with a groove 1431, the groove 1431 is arranged along the circumferential direction of the driving rod 143, the operating handle 11 is located in the groove 1431 on the side wall of the second operating hole, the driving rod 143 can rotate in the second operating hole by matching with the groove 1431 on the side wall of the operating handle 11, the displacement of the driving rod 143 in the axial direction is limited, the driving rod 143 cannot deviate from the second operating hole, and the rotating piece 14 is more stable when rotating.

The cross section of the clamping groove 141 is circular, the clamping member 15 includes a first section 151 and a second section 152 (refer to fig. 1 and 3) which are connected, the first section 151 can be clamped in the clamping groove 141, and the second section 152 can slide along the rotation axis direction of the rotating member 14 and is limited to rotate by the second operation hole. Illustratively, the first section 151 has a circular cross-section, the outer diameter of the first section 151 is equal to the inner diameter of the clamping groove 141, the cross-section of the second section 152 is square, and correspondingly, the second operation hole is adapted to the second section 152. When the cross section of the first section 151 is circular, the cross section of the slot 141 is circular, and the sizes of the two are the same, the rotating member 14 rotates by any angle, the first section 151 can cooperate with the slot 141 to prevent the rotating member 14 from rotating, and the second section 152 is also limited to rotate in the second operation hole. In other embodiments, the first section 151 may be configured to have a square cross-section, which is an inscribed square of the slot 141.

Alternatively, the side wall of the clamping groove 141 has a soft rubber layer 1411, and when the first section 151 of the clamping member 15 is clamped in the clamping groove 141, the soft rubber layer 1411 can increase the friction between the clamping member 15 and the clamping groove 141, so that the rotation of the rotating member 14 can be better prevented. Illustratively, the slot of the catch 141 has a guide surface that is obliquely disposed to facilitate insertion of the first segment 151 of the catch 15 into the catch 141.

In one possible embodiment, the rotating disc 142 has a first limiting groove 1425 and a second limiting groove 1426 (refer to fig. 2) disposed at intervals, the first wire 161 is wound around the first limiting groove 1425, the second wire 162 is wound around the second limiting groove 1426, and the winding directions of the first wire 161 and the second wire 162 are opposite. For example, when the first wire 161 is wound clockwise, then the second wire 162 is wound counterclockwise; when the first wire 161 is wound counterclockwise, the second wire 162 is wound clockwise. Since the first wire drawing 161 and the second wire drawing 162 are respectively positioned in the first limiting groove 1425 and the second limiting groove 1426, the first wire drawing 161 and the second wire drawing 162 do not interfere with each other in the process of folding and unfolding, respectively.

Referring to fig. 5, an exemplary rotary disc 142 includes a connecting body 1421, a disc body 1422 and a connecting rod 1423, wherein the connecting body 1421 is disposed at intervals with the disc body 1422, the disc body 1422 is circumferentially disposed along the connecting body 1421, the connecting body 1421 is connected with the disc body 1422 through a plurality of connecting rods 1423, the connecting rods 1423 are circumferentially disposed at intervals along the connecting body 1421, the clamping groove 141 is disposed on the connecting body 1421, and the first limiting groove 1425 and the second limiting groove 1426 are disposed on the disc body 1422. Wherein, the side of the disc main body 1422 facing away from the connecting main body 1421 is provided with a concave portion, and the first limiting groove 1425 and the second limiting groove 1426 are both arranged on the concave portion, so that the first wire drawing 161 and the second wire drawing 162 are not easy to deviate from the disc main body 1422. The plate body 1422 is provided with a connection through hole 1424 along a thickness direction thereof, and the first wire drawing 161 and the second wire drawing 162 are arranged through the connection through hole 1424 and one end of the first wire drawing and the second wire drawing 162 is fixed on one side of the connection through hole 1424, which is close to the connection rod 1423. Illustratively, the ends of the first wire 161 and the second wire 162 may be fixed at one end thereof to the side of the connection through hole 1424 near the connection rod 1423 by means of a knot, or may be fixed by means of welding or the like. When one ends of the first wire drawing 161 and the second wire drawing 162 are fixed to one side of the connection through hole 1424 near the connection rod 1423, the first wire drawing 161 and the second wire drawing 162 are not easily separated from the first limiting groove 1425 and the second limiting groove 1426 in the tightening process.

Alternatively, the first limiting groove 1425 and the second limiting groove 1426 are respectively provided with a connecting through hole 1424, the first wire drawing 161 is arranged through the connecting through hole 1424 corresponding to the first limiting groove 1425, and the second wire drawing 162 is arranged through the connecting through hole 1424 corresponding to the second limiting groove 1426. The first wire drawing 161 and the second wire drawing 162 are arranged in different connecting through holes 1424 in a penetrating manner, the first wire drawing 161 and the second wire drawing 162 are not mutually interfered, and are not easy to be intertwined together in the process of winding and unwinding the first wire drawing 161 and the second wire drawing 162.

Referring to fig. 6, in one embodiment, the catheter 12 includes an inner tube 122 and an outer tube 123, both ends of the inner tube 122 and the outer tube 123 are connected by a connection block, and the outer tube 123 is connected to the handle 11. One part of the wire drawing is positioned between the inner tube 122 and the outer tube 123, one end of the wire drawing is connected with the inner tube 122 or the outer tube 123, the other end of the wire drawing penetrates out of a gap between the inner tube 122 and the outer tube 123 and is wound around the rotating member 14, and the injection needle 132 is arranged in the inner tube 122. Because the needle 132 is spaced apart from the drawing wire through the inner tube 122 in the catheter 12, the chance that the needle 132 will be affected by the drawing wire as it moves within the inner tube 122 is reduced.

In conclusion, the bendable interventional device for heart failure auxiliary treatment can convey the injection needle assembly into a human body through the catheter, and the injection needle extends out of the orifice of the catheter to puncture and inject heart tissues. When the rotating piece rotates, the first wire drawing and the second wire drawing are respectively retracted and extended, the guide pipe bends towards one side of the first wire drawing when the first wire drawing is retracted and the second wire drawing is extended, the guide pipe bends towards one side of the second wire drawing when the first wire drawing is extended and the second wire drawing is extended, and the injection needle bends along with the bending of the guide pipe. In addition, because the first wire drawing and the second wire drawing are oppositely arranged on two sides of the axis of the catheter, the first wire drawing and the second wire drawing are respectively retracted and released when the rotating piece rotates, the resistance of the wire drawing to the bending of the catheter during bending is avoided, and the bending is more convenient during bending. The clamping piece is clamped in the clamping groove and can prevent the rotating piece from rotating, so that the bending degree of the guide pipe can be controlled. And the center of draw-in groove is located the axis of rotation of rotating the piece, and when rotating the piece and rotating arbitrary angle, the homoenergetic prevents rotating the piece with rotating after the card slot cooperation, then the precision of regulation and control is better.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An adjustable bend interventional device for use in the adjuvant treatment of heart failure comprising: the catheter comprises an operation handle, a catheter connected with the operation handle, an injection needle assembly arranged in the catheter, a rotating piece and a clamping piece arranged on the operation handle;

the injection needle assembly comprises a connecting pipe and an injection needle arranged at one end of the connecting pipe, and the injection needle can extend out of the pipe orifice of the catheter or retract from the pipe orifice;

the guide tube is internally provided with a plurality of wiredrawing, the wiredrawing comprises a first wiredrawing and a second wiredrawing, one ends of the first wiredrawing and the second wiredrawing are connected with one end, far away from the operating handle, of the guide tube, and the first wiredrawing and the second wiredrawing are oppositely arranged on two sides of the axis of the guide tube; the other ends of the first wire drawing and the second wire drawing are wound on the rotating piece, and the first wire drawing and the second wire drawing are respectively retracted and released when the rotating piece rotates;

the clamping groove is formed in one side face of the rotating piece, the center of the clamping groove is located on the rotating axis of the rotating piece, and the clamping piece can slide along the rotating axis direction of the rotating piece and is clamped in the clamping groove to prevent the rotating piece from rotating.

2. The bending-adjustable interventional device for heart failure auxiliary treatment according to claim 1, wherein the rotating member comprises a rotating disc and a driving rod coaxially arranged with a rotating axis of the rotating disc, the driving rod is connected with the rotating disc and penetrates through the operating handle, and the driving rod and the clamping member are arranged on two sides of the rotating disc, which are away from each other.

3. The adjustable bend interventional device for heart failure adjuvant therapy of claim 2, wherein the cross section of the clamping groove is circular, the clamping piece comprises a first section and a second section which are connected, the first section can be clamped in the clamping groove, and the second section can slide along the rotation axis direction of the rotating piece and is limited to rotate.

4. The adjustable bend interventional device of claim 3 wherein the first section is circular in cross-section, the outer diameter of the first section is equal to the inner diameter of the clamping groove, and the second section is square in cross-section.

5. The adjustable bend interventional device for heart failure adjuvant therapy of claim 3, wherein the side wall of the clamping groove is provided with a soft rubber layer.

6. The adjustable bend interventional device for heart failure auxiliary treatment according to any one of claims 2-5, wherein the rotating disc is provided with a first limit groove and a second limit groove which are arranged at intervals, the first wire drawing is wound on the first limit groove, the second wire drawing is wound on the second limit groove, and winding directions of the first wire drawing and the second wire drawing are opposite.

7. The adjustable bend interventional device for heart failure assist therapy of claim 6, wherein the rotating disk comprises a connecting body, a disk body and a connecting rod, the connecting body is arranged at intervals from the disk body, and the disk body is circumferentially arranged along the connecting body; the connecting main body is connected with the disc main body through a plurality of connecting rods, the connecting rods are arranged at intervals along the circumferential direction of the connecting main body, and the clamping grooves are formed in the connecting main body; the first limiting groove and the second limiting groove are formed in the disc main body, a connecting through hole is formed in the disc main body along the thickness direction of the disc main body, and the first wire drawing and the second wire drawing penetrate through the connecting through hole and one end portion of the first wire drawing and the second wire drawing is fixed to one side, close to the connecting rod, of the connecting through hole.

8. The adjustable bend interventional device for heart failure adjuvant therapy according to claim 7, wherein the first limiting groove and the second limiting groove are respectively provided with a connecting through hole, the first wire drawing is arranged through the connecting through holes correspondingly arranged in the first limiting groove, and the second wire drawing is arranged through the connecting through holes correspondingly arranged in the second limiting groove.

9. The adjustable bend interventional device for heart failure adjuvant therapy according to any one of claims 1-5, wherein the catheter comprises an inner tube and an outer tube, the wire-drawn portion is located between the inner tube and the outer tube, and the injection needle is disposed in the inner tube.

10. The adjustable bend interventional device for heart failure adjuvant therapy according to any one of claims 1-5, wherein an end of the catheter remote from the handle is horn-shaped.