CN117462827A

CN117462827A - Valve dilation shock wave aspiration catheter

Info

Publication number: CN117462827A
Application number: CN202311444056.1A
Authority: CN
Inventors: 卢立中; 欧阳俊雄; 杨帆
Original assignee: Weitai Medical Equipment Shenzhen Co ltd
Current assignee: Weitai Medical Equipment Shenzhen Co ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-01-30

Abstract

The invention discloses a valve expansion shock wave suction catheter which sequentially comprises a tip, a balloon, a catheter and a handle seat from a distal end to a proximal end, wherein a liquid passing cavity is arranged on the catheter; the balloon consists of at least four balloon bodies, wherein the balloon bodies are distributed around the catheter for one circle to form a ring shape so as to form a blood flow passage at the center of the balloon; at least two balloon bodies which are symmetrically arranged are provided with liquid-passing guide pipes communicated with the supporting rod through cavities, the liquid-passing guide pipes are provided with shock wave generators, and the transmitting directions of the shock wave generators face the periphery of the balloon; a miniature axial flow pump is arranged in the blood flow passage. Compared with the prior art, the blood circulation of the heart is realized, and the heart is not in an ischemia state, so that the safety of the operation is improved, and the heart is in a rest state in the process, so that the subsequent recovery and treatment are facilitated; meanwhile, the recovery of the biological morphology of the tricuspid valve is realized by breaking the calcification of the tricuspid valve through the energy of the shock wave, so that the problem of valve leakage is solved without replacing a patient's protozoo valve with an artificial valve.

Description

Valve dilation shock wave aspiration catheter

Technical Field

The invention relates to a medical apparatus, in particular to a valve expanding shock wave suction catheter.

Background

Heart valves are important components of the interior of the human heart, and they are located between the four chambers of the heart and the large blood vessels, and play a critical role in controlling the direction of blood flow. If a heart valve becomes defective, such as stenosed, incompletely closed, or damaged, it directly affects the normal function of the heart, possibly resulting in a situation in which blood flow is blocked, blood flows back, or the heart is overloaded. Serious heart valve diseases can lead to heart failure and cardiac arrhythmias and even life threatening. Maintaining the health of heart valves is critical to maintaining normal blood flow to the heart. The aortic valve is positioned between the left ventricle and the aorta and is positioned at the central position, and the aortic valve is closely related to each heart chamber and valve.

Heart balloons, also known as coronary balloon dilation (PTCA), are inserted through a catheter into a stenosed or occluded coronary artery and then inflated to dilate, thereby compressing the vessel wall within the artery and restoring blood flow.

Valve balloon dilation is only used to increase the blood flow path and restenosis occurs at a high rate and does not provide an effective auxiliary correction of cardiac hemodynamic forces. Then, in order to allow the heart to rest too quickly and positively and to improve the blood circulation at the same time, it is becoming a direction of our study to improve the therapeutic effect more efficiently.

Disclosure of Invention

The invention aims to provide a valve expansion shock wave suction catheter, which aims to solve the technical problems of assisting in realizing the blood circulation function of a heart in an operation, preventing ischemia in the heart operation, crushing calcified substances in a valve through shock wave energy, recovering the elasticity of the valve and realizing difficult tricuspid valve closure, improving the safety of the operation and having a therapeutic effect.

In order to solve the problems, the invention adopts the following technical scheme: the valve expanding shock wave suction catheter sequentially comprises a tip, a balloon, a catheter and a handle seat from the distal end to the proximal end, wherein a liquid passing cavity is formed in the catheter;

the balloon consists of at least four balloon bodies, the balloon bodies are distributed around the catheter for a circle to form a ring shape so as to form a blood flow passage at the center of the balloon, the blood flow passage is arranged along the axial direction of the balloon, the proximal end of the balloon body is connected with the distal end of the catheter, the distal end of the balloon body is connected with the proximal end of the tip, and the balloon body is communicated with the liquid flow passage cavity;

the proximal end and the distal end of the balloon body are respectively provided with a supporting rod, two ends of the supporting rod positioned at the distal end are respectively connected with the distal end of the balloon body and the proximal end of the tip, two ends of the supporting rod positioned at the proximal end are respectively connected with the proximal end of the balloon body and the distal end of the catheter, the supporting rod positioned at the proximal end is internally provided with a supporting rod through cavity communicated with the balloon body and the night cavity, at least two balloon bodies which are symmetrically arranged are internally provided with a liquid through catheter communicated with the supporting rod through cavity, the liquid through catheter is provided with a shock wave generator, and the transmitting direction of the shock wave generator faces the periphery of the balloon;

the miniature axial flow pump is arranged on the catheter, the guide wire catheter penetrating through the miniature axial flow pump is arranged in the miniature axial flow pump, the distal end of the guide wire catheter penetrates through the blood flow channel and then is fixedly connected with the tip, the proximal end of the guide wire catheter penetrates through the handle seat, the guide wire catheter is internally provided with a guide wire cavity, and the miniature axial flow pump is connected with the external driving interface of the impeller arranged on the proximal end of the handle seat.

Further, the miniature axial flow pump comprises an impeller shaft and an impeller, a through cavity for the impeller shaft to pass through is arranged in the guide tube, the distal end of the impeller shaft extends out of the distal end of the guide tube, the proximal end of the impeller shaft is inserted into the handle seat and is connected with the external driving interface of the impeller, the impeller is arranged on the distal end of the impeller shaft, the through cavity is arranged in the impeller shaft, and the guide wire guide tube passes through the through cavity.

Further, an impeller protecting cover is arranged outside the impeller, the proximal end of the impeller protecting cover is fixedly connected with the distal end of the catheter, and a protecting cover through hole is formed in the impeller protecting cover.

Further, the impeller protecting cover through hole is arranged at the proximal end of the impeller protecting cover.

Further, the impeller protecting cover comprises an outer ring surrounding the periphery of the impeller and a conical surface arranged at the proximal end of the outer ring, and the protecting cover through hole is arranged on the conical surface.

Further, the outer wall of the impeller protective cover is an arc transition surface or a triangle transition surface.

Further, the handle seat comprises a liquid passing interface, and a channel communicated with the liquid passing interface is arranged in the handle seat; the axial line of the handle seat is provided with a through hole penetrating through the proximal end and the distal end of the handle seat, the proximal end of the catheter is inserted into the through hole from the distal end of the handle seat, the proximal end of the catheter is in sealing connection with the through hole, the liquid through cavity is communicated with the liquid through cavity of the liquid through interface, the impeller external driving interface is arranged on the proximal end of the through hole, the impeller shaft is connected with the impeller external driving interface through the through hole, the proximal end of the guide wire catheter penetrates through the impeller external driving interface and extends out of the proximal end of the handle seat, and the handle seat is provided with an electrified connector electrically connected with the shock wave generator.

Further, the catheter is composed of an outer tube and an inner tube, the outer tube and the inner tube are coaxial, the outer diameter of the inner tube is smaller than the inner diameter of the outer tube, a liquid passing cavity is formed between the outer tube and the inner tube, and the impeller shaft passes through the inner tube.

Further, the shock wave generator is arranged at the center of the balloon body.

Further, two shock wave generators symmetrically arranged are connected in series.

Compared with the prior art, the method combines the saccule dilation operation with mechanical circulation assistance, and simultaneously expands the blood circulation path of the saccule, replaces the function of a part of heart valves by the aid of the impeller, pumps oxygenated blood of the left ventricle out through the inlet of the catheter, and then directly pumps the oxygenated blood into the ascending aorta to establish the drainage path from the left ventricle to the ascending aorta, so that the blood circulation of the heart is realized, and the safety of the operation is improved because the heart is not in an ischemia state, and the heart is in a rest state in the process, thereby being convenient for subsequent recovery and treatment; meanwhile, the recovery of the biological morphology of the tricuspid valve is realized by breaking the calcification of the tricuspid valve through the energy of the shock wave, so that the problem of valve leakage is solved without replacing a patient's protozoo valve with an artificial valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the balloon of the present invention.

Fig. 3 is a cross-sectional view taken along the direction A-A in fig. 1.

Fig. 4 is a sectional view in the direction B-B of fig. 1.

Fig. 5 is a sectional view in the direction C-C of fig. 1.

Fig. 6 is a schematic structural view of the handle base of the present invention.

Fig. 7 is an enlarged view of a portion of the handle base of the present invention.

Fig. 8 is a partial enlarged view of the handle base of the present invention.

Fig. 9 is a schematic diagram of the structure of the shock wave generator of the present invention.

Fig. 10 is a schematic view of the internal structure of the shock wave generator of the present invention.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples.

In the present invention, distal refers to the end distal from the operator; proximal refers to the end that is proximal to the operator.

As shown in fig. 1, 2 and 4-6, the invention discloses a valve expansion shock wave suction catheter, which sequentially comprises a tip 1, a balloon 2, a catheter 3 and a handle seat 4 from the distal end to the proximal end, wherein:

the catheter 3 is provided with a liquid passing cavity 31, and the proximal end of the catheter 3 is fixedly connected with the distal end of the handle seat 4;

the balloon 2 consists of eight balloon bodies 22, the balloon bodies 22 are distributed around the catheter 3 to form a ring shape, so that a blood flow passage 21 is formed at the center of the balloon 2, the whole appearance of the balloon 2 is olive-shaped, the blood flow passage 21 is arranged along the axial direction of the balloon 2, the blood flow passage 21 can realize the treatment of calcification of heart valves, a certain amount of cardiac output is still reserved when the balloon is expanded, the blood flow passage is prevented from being completely blocked, the influence of balloon dilatation on the hemodynamics is reduced, the occurrence rate of incapacity of blood flow is reduced, a supporting rod 23 is respectively arranged at the proximal end and the distal end of the balloon body 22, the distal end of a guide wire catheter 7 extends from the distal end of an impeller shaft 5 to penetrate through the blood flow passage 21 and is fixedly connected with the tip 1 and the distal end of the supporting rod 23, the proximal end of the guide tube 3, a supporting rod through cavity 231 is arranged in the supporting rod 23 at the proximal end, in the balloon body 22, at least one pair of symmetrically arranged balloon cavities of the balloon bodies 22 are provided with a flexible liquid flow passage 24, the distal end of the liquid passage 24 is a sealing surface of the liquid passage 24, the far end of the balloon body 24 is connected with the balloon body 241 or the liquid passage 24 is directly connected with the liquid passage 24 through the supporting rod 24 through the supporting rod 231 from the balloon cavity 22, and the communicating with the through the supporting rod through holes 231 directly arranged in the communicating cavity between the two cavities; a shock wave generator 9 is arranged on the liquid-passing conduit 24, and the transmitting direction of the shock wave generator 9 faces the periphery of the balloon 2;

the miniature axial flow pump 5 is arranged in the blood flow passage 21, the miniature axial flow pump 5 is arranged on the catheter 3, the guide wire catheter 7 penetrating through the miniature axial flow pump 5 is arranged in the miniature axial flow pump 5, the distal end of the guide wire catheter 7 penetrates through the blood flow passage 21 and then is connected and fixed with the tip 1, the proximal end of the guide wire catheter 7 penetrates through the handle seat 4, the guide wire catheter 7 is internally provided with the guide wire cavity 71, the miniature axial flow pump 5 is connected with the impeller external driving interface 8 arranged on the proximal end of the handle seat 4, and the proximal end of the guide wire catheter 7 penetrates through the impeller external driving interface 8 and forms an inlet with the proximal end of the impeller external driving interface 8 so as to realize that blood can be guided to smoothly flow into the aorta while the balloon is expanded.

As shown in fig. 2, the micro axial flow pump 5 comprises at least a spring-shaped impeller shaft 51 having elasticity, an impeller 6, a through cavity for the impeller shaft 51 to pass through, and a guide tube 3, wherein the distal end of the impeller shaft 51 extends out from the distal end of the guide tube 3, the proximal end of the impeller shaft 51 is inserted into the handle seat 4 and connected with the impeller body external driving interface 8, the impeller 6 is arranged on the distal end of the impeller shaft 51, a through cavity is arranged in the impeller shaft 51, and the guide wire guide tube 7 passes through the through cavity.

The outer diameter of the guide wire catheter 7 is smaller than the through cavity diameter of the impeller shaft 51 to ensure that rotation of the impeller shaft 51 will not drive the guide wire catheter 7 to rotate together.

In the present invention, the impeller driving interface 8 includes a rotation driving component and a non-rotatable fixing component, which are in the prior art, and not described in detail herein, it should be noted that the guide wire catheter 7 passes through the rotation driving component from the center of the impeller body external driving 8 and is fixed with the proximal end of the fixing component, so as to realize that the rotation driving component does not drive the guide wire catheter 7 to rotate together when rotating, and the proximal end of the impeller shaft 51 is connected with the rotation driving component, so as to realize rotation.

As shown in fig. 2, the impeller 6 is disposed at the center of the proximal end of the bleeding channel 21, an impeller protecting cover 61 is disposed outside the impeller 6 to prevent the impeller 6 from damaging the balloon during operation, the impeller protecting cover 61 has an olive-shaped structure with two ends having a smaller diameter than the middle diameter, the proximal end of the impeller protecting cover 61 is fixedly connected with the distal end of the catheter 3, and a protecting cover through hole 611 is provided at the proximal end of the impeller protecting cover 61 to guide the blood to smoothly flow into the aorta.

As shown in fig. 2, the impeller protector 61 includes an outer wall 612 surrounding the periphery of the impeller 6 and a tapered surface 613 provided at the proximal end of the outer wall 612, and the protector through hole 611 is provided on the tapered surface 613 so that the blood flow can be smoothly guided.

As shown in fig. 2, the outer wall 612 of the impeller protecting cover 61 is an arc transition surface or a triangle transition surface, so that when the balloon is not expanded, the portion will not scratch the blood vessel or the catheter during the entering due to the overlarge folding transition of the proximal supporting rod 23 caused by the distal edge of the impeller protecting cover 61, and smooth passing is ensured.

However, the present invention is not limited thereto, and the impeller 6 may be provided at the middle of the balloon 2, the outer wall of the impeller housing 61 being connected to the balloon body 21, and the distal end of the impeller shaft 51 being protruded out of the catheter 3.

As shown in fig. 2 and 4, the tip 1 has a through cavity, the lumen of the guide wire catheter 7 is communicated with the through cavity of the tip 1, the tip 1 is composed of a cone and a cylinder, the cylinder is fixedly connected with the distal end of the catheter 3, and the cone is arranged at the distal end of the cylinder.

As shown in fig. 6 to 8, the handle base 4 includes a liquid-passing port 41, and a passage communicating with the liquid-passing port 41 is provided in the handle base 4; the axis of the handle seat 4 is provided with a through hole 42 penetrating the proximal end and the distal end of the handle seat 4, the proximal end of the catheter 3 is inserted into the through hole 42 from the distal end of the handle seat 4, the proximal end of the catheter 3 is in sealing connection with the through hole 42, the liquid through cavity 31 is communicated with the liquid through cavity of the liquid through interface 41, the impeller external driving interface 8 is arranged on the proximal end of the through hole 42, the impeller shaft 51 is connected with the impeller external driving interface 8 through the through hole 42, the proximal end of the wire guide 7 penetrates through the impeller external driving interface 8 and extends out from the proximal end of the handle seat 4, and the handle seat 4 is provided with an electrifying connector 43 electrically connected with the shock wave generator 9.

As shown in fig. 6, the through hole 42 is composed of a plurality of holes with different diameters, and comprises a first through hole 421 matched with the outer diameter of the catheter 3, a second through hole 422 matched with the outer diameter of the spring impeller shaft 5 and a third through hole 423 matched with the outer dimension of the impeller body external driving interface 8 from the distal end to the proximal end.

In the present invention, the balloon 22 is integrally formed with the support rod.

As shown in fig. 2, balloon 22 includes a cylindrical shape 221 disposed in the middle and a taper 222 disposed at the proximal and distal ends of cylindrical shape 221, respectively.

As shown in fig. 9 and 10, the shock wave generator 9 comprises an electrode ring 91, an insulating sleeve 92 and a metal sleeve 93, wherein the electrode ring 91 is sleeved outside the liquid-passing guide pipe 24, the insulating sleeve 92 is arranged between the electrode ring 91 and the liquid-passing guide pipe 24, the shock wave generator 9 is electrically connected with the power-on connector 43 through a wire 10, the wire 10 is coated with an insulating layer, the wire 10 can extend along the inner wall of the guide pipe 3 towards the proximal direction of the handle seat 4 and is electrically connected with the power-on connector 43, a copper exposure area is arranged on the wire 10, and the metal sleeve 93 is sleeved on the copper exposure area of the wire and is tightly pressed and fixed; at least one shock wave emitting hole 911 is arranged on the electrode ring 91, the shock wave emitting hole 911 faces the periphery of the balloon 2, the copper exposing area of the lead is opposite to the shock wave emitting hole 911, a naked hole 921 for exposing part of the metal sleeve 93 is arranged at the position of the shock wave emitting hole 911 of the insulating sleeve 92, the electrode ring 91, the insulating sleeve 92 and the metal sleeve 93 are filled in gaps through insulating glue 94 and are adhered and fixed outside the liquid-passing guide pipe 24, and therefore the structure and the outward emission of the shock wave generator are enhanced.

As shown in fig. 3, the shock wave generator 9 is provided at the center of the balloon body 22.

As shown in fig. 9 and 10, the electrode ring 91 of each shock wave generator 9 is composed of two ring bodies 912 symmetrically arranged, a connecting portion 913 is arranged between the two ring bodies 912, the connecting portion 913 connects the two ring bodies 912, shock wave emitting holes 911 are respectively arranged on the two ring bodies 912, so that each shock wave generator 9 can release shock wave energy twice, and the positions of the two shock wave emitting holes 911 are the same.

In the present invention, two shock wave generators 9 are symmetrically arranged in series, as shown in fig. 2, the lead 10 includes a positive lead 101, a negative lead 102, and a connection lead 103, the positive lead 101 is opposite to a ring 912 at a proximal end of one shock wave generator 9, the negative lead 102 is opposite to a ring 912 at a proximal end of the other shock wave generator 9, the connection lead 103 is used for connecting the two shock wave generators 9 in series, and a proximal end of the negative lead 102 is electrically connected with a negative electrode of the power connection 43.

The positive electrode lead 101 and the negative electrode lead 102 respectively penetrate into the balloon body 22 from the supporting rod through cavities 241 in the supporting rods 23 at the proximal ends, and the connecting lead 103 can be arranged against the outer wall of the guide wire catheter 7 and fixed by glue.

As shown in fig. 9 and 10, two through holes 241 are provided in each of the liquid passing pipes 24.

As shown in fig. 3, the distal end of the catheter 3 is sealingly connected to the proximal end of the proximal support rod 23; specifically, the catheter 3 is composed of an outer tube 32 and an inner tube 33, the outer tube 32 is coaxial with the inner tube 33, the outer diameter of the inner tube 33 is smaller than the inner diameter of the outer tube 32, a liquid passing cavity 31 is formed between the outer tube 32 and the inner tube 33, and an impeller shaft 51 passes through the inner tube 33; it is of course also possible to provide the same number of liquid passing cavities 31 as the number of the balloon bodies 22 in the wall of the catheter 3, and the proximal end of the outer tube 32 is adhered and fixed to the distal end of the through hole 42, and the outer tube 32 is in sealing connection with the proximal end of the inner tube 33.

When in use, the device is placed at the position of the active aortic valve, after liquid is introduced, the balloon body is filled, after the aortic valve is expanded, the internal impeller is driven by the external driver to pump the blood of the left ventricle out through the inlet of the catheter and pump the blood into the main artery. At this point, the shock wave energy at the working section of the excitation balloon acts on the tricuspid valve against the balloon wall, completing the treatment after a number of cycles of pulse release. Because the heart does not have an ischemia state in the operation, the safety of the operation is improved. Through the process, the heart is at rest while the blood circulation of the heart is maintained, the heart load is effectively lightened, the method is suitable for treating critical cardiovascular diseases, the method can also be used as the early treatment of other operations, for example, a patient waiting for heart transplantation can firstly use the product to maintain the normal activity of the heart; and the treatment of the shock waves can effectively relieve the calcified tricuspid valve biological morphology of the patient, and the artificial valve is not used for replacing the original biological valve.

Claims

1. Valve expansion shock wave suction catheter, including pointed end (1), sacculus (2), pipe (3), handle seat (4) in proper order from distal end to proximal end, its characterized in that: the catheter (3) is provided with a liquid passing cavity (31);

the balloon (2) is composed of at least four balloon bodies (22), the balloon bodies (22) are distributed around the catheter (3) in a circle to form a ring shape, so that a blood flow passage (21) is formed in the center of the balloon (2), the blood flow passage (21) is arranged along the axial direction of the balloon (2), the proximal end of the balloon body (22) is connected with the distal end of the catheter (3), the distal end of the balloon body (22) is connected with the proximal end of the tip (1), and the balloon body (22) is communicated with the liquid flow passage cavity (31);

the proximal end and the distal end of the balloon body (22) are respectively provided with a support rod (23), two ends of the support rods (23) positioned at the distal end are respectively connected with the distal end of the balloon body (22) and the proximal end of the tip (1), two ends of the support rods (23) positioned at the proximal end are respectively connected with the proximal end of the balloon body (22) and the distal end of the catheter (3), support rod through cavities (231) which are communicated with the balloon body (22) and the night cavity (31) are arranged in the support rods (23) positioned at the proximal end, at least two balloon bodies (22) which are symmetrically arranged are provided with liquid through catheters (24) which are communicated with the support rod through cavities (231), the liquid through catheters (24) are provided with shock wave generators (9), and the transmitting directions of the shock wave generators (9) face the periphery of the balloon (2);

be equipped with miniature axial-flow pump (5) in leading to blood runner (21), miniature axial-flow pump (5) set up on pipe (3), be equipped with in miniature axial-flow pump (5) and run through its inside seal wire pipe (7), the distal end of seal wire pipe (7) is connected fixedly with pointed end (1) after passing through leading to blood runner (21), the proximal end of seal wire pipe (7) runs through handle seat (4), seal wire chamber (71) have in seal wire pipe (7), miniature axial-flow pump (5) are connected with impeller external drive interface (8) of setting on handle seat (4) proximal end.

2. The valve dilation shock wave aspiration catheter of claim 1, wherein: the miniature axial flow pump (5) comprises an impeller shaft (51) and an impeller (6), wherein a through cavity for the impeller shaft (51) to pass through is formed in the guide pipe (3), the distal end of the impeller shaft (51) extends out of the distal end of the guide pipe (3), the proximal end of the impeller shaft (51) is inserted into the handle seat (4) and connected with the impeller external driving interface (8), the impeller (6) is arranged on the distal end of the impeller shaft (51), the through cavity is formed in the impeller shaft (51), and the guide wire guide pipe (7) passes through the through cavity.

3. The valve dilation shock wave aspiration catheter of claim 2, wherein: an impeller protection cover (61) is arranged outside the impeller (6), the proximal end of the impeller protection cover (61) is fixedly connected with the distal end of the catheter (3), and a protection cover through hole (611) is formed in the impeller protection cover (61).

4. A valve dilation shock wave aspiration catheter according to claim 3, wherein: the impeller protecting cover through hole (611) is arranged at the proximal end of the impeller protecting cover (61).

5. The valve dilation shock wave aspiration catheter of claim 4, wherein: the impeller protection cover (61) comprises an outer ring (612) surrounding the periphery of the impeller (6) and a conical surface (613) arranged at the proximal end of the outer ring (612), and the protection cover through hole (611) is arranged on the conical surface (613).

6. The valve dilation shock wave aspiration catheter of claim 5, wherein: the outer wall (612) of the impeller protection cover (61) is an arc transition surface or a triangle transition surface.

7. The valve dilation shock wave aspiration catheter of claim 1, wherein: the handle seat (4) comprises a liquid passing interface (41), and a channel communicated with the liquid passing interface (41) is arranged in the handle seat (4); the axial line of the handle seat (4) is provided with a through hole (42) penetrating through the proximal end and the distal end of the handle seat (4), the proximal end of the catheter (3) is inserted into the through hole (42) from the distal end of the handle seat (4), the proximal end of the catheter (3) is in sealing connection with the through hole (42), the liquid through cavity (31) is communicated with the through cavity of the liquid through interface (41), the impeller external driving interface (8) is arranged on the proximal end of the through hole (42), the impeller shaft (5) is connected with the impeller external driving interface (8) through the through hole (42), the proximal end of the guide wire catheter (7) penetrates through the impeller external driving interface (8) and extends out from the proximal end of the handle seat (4), and the handle seat (4) is provided with an electrifying connector (43) electrically connected with the shock wave generator (9).

8. The valve dilation shock wave aspiration catheter of claim 7, wherein: the catheter (3) consists of an outer tube (32) and an inner tube (33), the outer tube (32) is coaxial with the inner tube (33), the outer diameter of the inner tube (33) is smaller than the inner diameter of the outer tube (32), a liquid passing cavity (31) is formed between the outer tube (32) and the inner tube (33), and an impeller shaft (51) passes through the inner tube (33).

9. The valve dilation shock wave aspiration catheter of claim 1, wherein: the shock wave generator (9) is arranged at the center of the balloon body (22).

10. The valve dilation shock wave aspiration catheter of claim 9, wherein: two shock wave generators (9) which are symmetrically arranged are connected in series.