CN116173386B - Shock wave balloon catheter - Google Patents

Abstract

The application relates to the technical field of medical equipment, and discloses a shock wave balloon catheter, which comprises: the first conduit is provided with a first end and a second end, the first conduit is provided with an inner channel, the first end is provided with a first inner pipe orifice, the second end is provided with a second inner pipe orifice, and the inner channel is also communicated with the suction unit; a liquid injection cavity is arranged between the saccule and the first catheter; the second conduit is provided with a liquid injection channel; the sound wave transmitting unit is used for generating shock waves in the liquid injection cavity; the movable wire is rotatably arranged in the inner channel and is provided with a tail end and a front end, the tail end of the movable wire extends to the outer space of the inner channel, the front end of the movable wire is provided with a spiral part, and the spiral part can move to the outer space of the inner channel along the axial direction of the first catheter through the second inner pipe port. The balloon catheter can treat complex vascular stenosis, calcification and other lesions, can recycle and treat lesion plaques, and can avoid the occurrence of postoperative complications.

Description

Shock Wave Balloon Catheter

Technical Field

The present application relates to the technical field of medical devices, and in particular to a shock wave balloon catheter.

Background Art

Cardiovascular disease has long been one of the major causes of death. Balloon angioplasty has played an important role in reducing the incidence and mortality of obstructive coronary artery disease and has become the most commonly used method for treating coronary heart disease in countries around the world. At the same time, balloon angioplasty is also the main method for revascularization in patients with peripheral artery disease.

For traditional catheter interventional treatment technology, percutaneous transluminal angioplasty (PTA) is usually used clinically to open stenosis, calcification and other lesions in arteries and veins. When the balloon expands the blocked lesions in the blood vessel wall, the balloon will gradually release pressure until the plaque ruptures; but at the same time, if the plaque fragments are not cleaned up in time, it is easy to cause other risks to the operation.

Summary of the invention

The present application provides a shock wave balloon catheter that can completely open up the diseased area and recover and treat the diseased plaque to avoid the occurrence of intraoperative complications.

The present application provides a shock wave balloon catheter, comprising:

A first conduit, the first conduit having a first end and a second end, the first conduit being provided with an inner channel extending along the axial direction of the first conduit, the first end being provided with a first inner pipe opening connecting the inner channel with a space outside the inner channel, the second end being provided with a second inner pipe opening connecting the inner channel with a space outside the inner channel, and the inner channel being further connected with a suction unit;

A balloon, wherein the balloon is sleeved on the second end, and an injection cavity is provided between the balloon and the first catheter;

a second catheter, the second catheter being located at a side of the balloon close to the first end, the second catheter being sleeved on the first catheter, and the second catheter being provided with an injection channel communicating with the injection cavity;

an acoustic wave emitting unit, the acoustic wave emitting unit being disposed in the liquid injection cavity, the acoustic wave emitting unit being used to generate a shock wave in the liquid injection cavity in a direction away from the first end; and

A moving wire, the moving wire is rotatably arranged in the inner channel, the moving wire has an end and a front end, the end extends to the external space of the inner channel through the first inner tube opening, the front end is provided with a spiral portion, the axis of the spiral portion is parallel to the axial direction of the first conduit, and the spiral portion can move along the axial direction of the first conduit through the second inner tube opening to the external space of the inner channel.

In some embodiments, the moving wire is provided with a guide portion, and the guide portion is located on a side of the spiral portion away from the end.

In some embodiments, the moving wire is further provided with a connecting portion, the spiral portion is located between the guiding portion and the connecting portion, and the connecting portion is connected to the spiral portion.

In some embodiments, the spiral portion is wound around the front end; or, one end of the spiral portion is connected to the front end.

In some embodiments, a cross section of the spiral portion along a direction perpendicular to an axis of the spiral portion is rectangular, and corners of the rectangle are chamfered.

In some embodiments, the pitch of the spiral portion is 0.80 mm-1.50 mm.

In some embodiments, the number of turns of the spiral portion is greater than or equal to 2 and less than or equal to 5.

In some embodiments, the sound wave emitting unit comprises:

Two electrode tips, the distance between the two electrode tips is less than or equal to 0.6 mm;

A pulse power supply is electrically connected to the electrode head through a wire, and a surface of the wire is coated with an insulating layer.

In some embodiments, the shock wave balloon catheter further comprises a moving unit connected to the distal end, the moving unit being used to drive the moving wire to rotate around the axis of the spiral portion, and the moving unit being used to drive the moving wire to reciprocate along the axial direction of the first catheter.

In some embodiments, the mobile unit comprises:

A rotating power member connected to the end, the rotating power member is used to drive the moving wire to rotate around the axis of the spiral portion;

A telescopic power member, wherein the telescopic power member has a telescopic end, wherein the telescopic end is connected to the rotating power member, and the telescopic power member is used to drive the rotating power member and the moving wire to move back and forth along the axial direction of the first conduit.

The shock wave balloon catheter provided in the embodiment of the present application has the beneficial effect that: since the inner channel of the first catheter is connected to the suction unit, an injection cavity is arranged between the balloon and the first catheter, the sound wave emission unit in the injection cavity is used to generate shock waves in the injection cavity, and the spiral portion arranged at the front end of the moving wire can be moved to the external space of the inner channel through the second inner tube opening. Therefore, when treating blocked lesions in blood vessels, the first catheter and the balloon can be first sent to the lesion site, and then the non-focused shock wave is output outwardly through the sound wave emission unit to generate compression stress and fracture the lesion plaque in the lesion site. After completing the shock wave treatment, the spiral portion is moved to the lesion site, and the suction function of the suction unit is started. While the spiral portion rotates around the moving wire, it can also reciprocate along the axial direction of the first catheter, which can not only better lyse the lesion plaque, but also bring the lysed lesion plaque into the inner channel and guide it out of the body through the suction unit. Finally, the lesion site is expanded with the balloon to complete the treatment process. The shock wave balloon catheter provided in the embodiment of the present application has a better therapeutic effect on lesions and can recover and process lesion materials to avoid the occurrence of intraoperative complications.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram of the three-dimensional structure of a shock wave balloon catheter in one embodiment of the present application;

FIG2 is a schematic diagram of the three-dimensional structure of the shock wave balloon catheter shown in FIG1 after removing the moving wire;

FIG3 is a front view of the shock wave balloon catheter shown in FIG1 after the moving wire is removed;

FIG4 is a schematic diagram of the three-dimensional structure of the sound wave emitting unit in the shock wave balloon catheter shown in FIG1 ;

FIG5 is a schematic diagram of the three-dimensional structure of the moving wire in the shock wave balloon catheter shown in FIG1 ;

FIG6 is a schematic cross-sectional view of the spiral portion of the moving wire shown in FIG5 along a direction perpendicular to the axis of the spiral portion;

FIG. 7 (a) is a schematic diagram of the shock wave balloon catheter shown in FIG. 1 blocking the lesion position in the blood vessel;

FIG. 7 ( b ) is a schematic diagram of the shock wave balloon catheter shown in FIG. 1 performing shock wave treatment on an obstructed lesion in a blood vessel;

FIG. 7 ( c ) is a schematic diagram of the shock wave balloon catheter shown in FIG. 1 treating a fractured lesion plaque in a blood vessel;

FIG8 is a schematic diagram of the three-dimensional structure of a shock wave balloon catheter in another embodiment of the present application.

The meanings of the marks in the figure are:

100. Shock wave balloon catheter;

10. first conduit; 11. first end; 12. second end; 13. inner passage; 14. first inner pipe opening; 15. second inner pipe opening;

20. Balloon; 21. Liquid injection cavity; 22. Fixing part;

30. Second conduit; 31. Liquid injection channel;

40. Acoustic wave emitting unit; 401. Shock wave; 41. Electrode head; 42. Wire; 43. Insulating layer;

50, moving wire; 51, end; 52, front end; 53, spiral part; 54, guide part; 541, tip; 55, connecting part;

60. Development ring;

200. Blood vessels.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

References to "one embodiment", "some embodiments" or "an embodiment" described in the specification of this application mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some other embodiments", "in some other embodiments", etc., which appear at different places in this specification, do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, particular features, structures or characteristics may be combined in any suitable manner.

In order to illustrate the technical solution of the present application, a description is given below with reference to specific drawings and embodiments.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , an embodiment of the present application provides a shock wave balloon catheter 100 , including a first catheter 10 , a balloon 20 , a second catheter 30 , a sound wave emitting unit 40 and a moving wire 50 .

The first conduit 10 has a first end 11 and a second end 12. The first conduit 10 is provided with an inner channel 13 extending along the axial direction of the first conduit 10. The first end 11 is provided with a first inner pipe opening 14 connecting the inner channel 13 with the external space of the inner channel 13. The second end 12 is provided with a second inner pipe opening 15 connecting the inner channel 13 with the external space of the inner channel 13. The inner channel 13 is also connected with a suction unit (not shown in the figure).

It is understandable that the suction unit may include a suction pump and a solenoid valve, etc. The suction unit can generate negative pressure to suck out the material in the inner channel 13. The suction unit can be connected to the inner channel 13 through the first inner pipe port 14, or the suction unit can be connected to the inner channel 13 through other parts of the first conduit 10.

The balloon 20 is sleeved on the second end 12 , for example, the balloon 20 is sleeved on the outer wall near the second end 12 of the first catheter 10 , and an injection cavity 21 is provided between the balloon 20 and the first catheter 10 .

It is understandable that the injection cavity 21 can be used to contain water, saline, contrast agent or a mixed liquid thereof, and the balloon 20 will expand when liquid is introduced into the injection cavity 21. In this embodiment, the balloon 20 is an OTW (Over The Wire) type.

A fixing portion 22 may be provided at one end of the balloon 20 , and the balloon 20 , the fixing portion 22 and the first catheter 10 are connected together by laser welding or other methods.

The second catheter 30 is located at a side of the balloon 20 close to the first end 11 . The second catheter 30 is sleeved on the first catheter 10 . The second catheter 30 is provided with an injection channel 31 communicating with the injection cavity 21 .

In one embodiment of the present application, the injection channel 31 is a cavity between the second catheter 30 and the first catheter 10 .

It is understandable that the second catheter 30 and the balloon 20 may also be connected together by laser welding or other methods.

The sound wave emitting unit 40 is disposed in the liquid injection cavity 21 , and is used to generate a shock wave 401 in the liquid injection cavity 21 along a direction away from the first end 11 .

It is understandable that, since the electric arc generated by the acoustic wave emitting unit 40 can generate a shock wave 401 in the liquid of the injection chamber 21 in a direction away from the first end 11, the shock wave 401 can be emitted to fracture the lesion plaque when the balloon 20 is located outside the lesion site. For example, please refer to FIG. 4 . In this embodiment, the acoustic wave emitting unit 40 includes a pulse power supply (not shown) and two electrode heads 41 . The distance between the two electrode heads 41 is less than or equal to 0.6 mm, such as 0.6 mm, 0.5 mm or 0.4 mm. The two electrode heads 41 can be respectively arranged on opposite sides of the second end 12 . For example, the two electrode heads 41 can be bonded to the second end 12 by UV glue (Ultraviolet Rays, photosensitive glue). The pulse power supply is electrically connected to the electrode head 41 through a wire 42 , and the surface of the wire 42 is coated with an insulating layer 43 . The two electrode heads 41 are kept at a certain distance so that an arc is generated when the pulse power supply transmits voltage and current. The generated arc generates a shock wave 401 in the liquid of the injection cavity 21, and bubbles that expand and collapse rapidly are generated on the surface of the electrode head 41, thereby generating a shock wave 401 in the injection cavity 21 in a direction away from the first end 11. The size of the shock wave 401 can be controlled by controlling the size, current, duration and repetition rate of the pulse voltage transmitted by the pulse power supply. In this design, the electrode head 41 is small in size and relatively far away from the balloon 20. While achieving the treatment effect, it will not cause damage to the balloon 20. The insulation of the balloon 20 can protect the patient from electric shock.

It is understandable that after receiving the discharge pulse, the acoustic wave emitting unit 40 will produce a hydroelectric effect, so that the electrical energy is converted into mechanical energy, and a non-focused shock wave 401 is output outward, generating compressive stress, and further fracturing the diseased plaque at the diseased site.

Please refer to Figures 5, (a), (b) and (c) in Figure 7. The moving wire 50 is rotatably disposed in the inner channel 13. The moving wire 50 has an end 51 and a front end 52. The end 51 extends to the external space of the inner channel 13 through the first inner pipe opening 14, and the front end 52 is provided with a spiral portion 53. The axis of the spiral portion 53 is parallel to the axial direction of the first conduit 10. The spiral portion 53 can move along the axial direction of the first conduit 10 through the second inner pipe opening 15 to the external space of the inner channel 13.

It is understandable that the end 51 can be controlled manually or automatically to rotate the moving wire 50 and reciprocate along the axial direction of the first catheter 10, and the spiral portion 53 will also reciprocate along the axial direction of the first catheter 10 while rotating with the moving wire 50, thereby stirring the already fractured diseased plaque, and bringing the already lysed diseased plaque into the inner channel 13 and out of the body through the suction unit.

It is understandable that for narrow lesion plaques, after the shock wave 401 fractures the lesion plaque, the lesion plaque may still be difficult to loosen and fall off by itself, so at this time it is necessary to first use the spiral portion 53 to stir the already fractured lesion plaque to make it loose and fall off, and then the suction unit uses the inner tube to suck the loosened and fallen lesion plaque out of the body.

When the shock wave balloon catheter 100 provided in the embodiment of the present application is used during surgery, the finger guide wire is first placed in the inner channel 13, and the shock wave balloon catheter 100 reaches the lesion site along the finger guide wire. At this time, the finger guide wire is removed from the body, the finger guide wire is replaced with the moving wire 50, and the inner channel 13 is connected to the suction unit.

It should be noted that, for the spiral portion 53, the diseased plaque and the thrombus are different. The thrombus belongs to soft tissue, and the spiral portion 53 alone can pass through the thrombus and be sucked out of the body. For some areas with more serious lesions, the spiral portion 53 may not be able to pass through the hard diseased plaque before the shock wave 401 is used for fracturing. In the blood vessels 200 with more serious lesions, it is very easy to cause serious complications, such as dissection, perforation of the blood vessel 200, and no blood flow/slow blood flow, etc. Therefore, it must be fractured with the shock wave 401 generated by the above-mentioned acoustic wave emitting unit 40 to realize its function (the spiral portion 53 rotates slowly and moves back and forth to stir and bring out the fractured diseased plaque) without the risk of complications.

In the shock wave balloon catheter 100 provided in the embodiment of the present application, since the inner channel 13 of the first catheter 10 is connected with the suction unit, an injection cavity 21 is provided between the balloon 20 and the first catheter 10, and the sound wave emission unit 40 in the injection cavity 21 is used to generate shock waves 401 in the injection cavity 21, and the spiral portion 53 provided at the front end 52 of the moving wire 50 can be moved to the outer space of the inner channel 13 through the second inner tube opening 15, so when treating occlusive lesions, the first catheter 10 and the balloon 20 can be first delivered to the lesion site, and then the non-focused shock waves are output outwardly through the sound wave emission unit 40. 401, generating compressive stress, fracturing the lesion plaque of the completely occluded lesion site, after completing the shock wave 401 treatment, the spiral part 53 is moved to the lesion site, and the suction function of the suction unit is started. While the spiral part 53 rotates around the moving wire 50, it can also reciprocate along the axial direction of the first catheter 10, so that not only the lesion plaque can be better lysed, but also the lysed lesion plaque can be brought into the inner channel 13 and guided out of the body through the suction unit, avoiding the formation of acute thrombus during the operation, and finally the balloon 20 is used to expand the lesion site to complete the treatment process. The shock wave balloon catheter 100 provided in the embodiment of the present application can completely open the lesion site, and can recycle and process the lesion structure to avoid the occurrence of complications during the operation.

The shock wave balloon catheter 100 provided in the embodiment of the present application can achieve a better opening effect in the blood vessel 200 with more serious lesions, and can recover and process the lesion plaque to avoid the formation of acute thrombosis during the operation. The whole operation process is simple and does not cause additional damage to the patient.

Optionally, the portion of the wire 42 without the insulating layer 43 is connected to the electrode head 41 by, but not limited to, laser welding. The wire 42 may be made of copper, the insulating layer 43 may be made of polyimide, and the electrode head 41 may be made of stainless steel. Since copper is more easily worn than stainless steel, such a configuration can reduce the wear of the electrode head 41 during the process of the electrode head 41 discharging to generate the shock wave 401, thereby increasing the service life of the electrode head 41.

Please refer to FIG. 1 and FIG. 5 . In some embodiments, the moving wire 50 is provided with a guide portion 54 . The guide portion 54 is located on a side of the spiral portion 53 away from the end 51 .

By adopting the above scheme, before using the spiral portion 53 to stir the already fractured diseased plaque, the guide portion 54 can be first inserted into the already fractured diseased plaque, and then the spiral portion 53 can be rotated, so that more already fractured diseased plaques can be stirred and the already lysed diseased plaques can be better brought into the inner channel 13.

Optionally, one end of the guide portion 54 away from the spiral portion 53 is configured as a tip 541. With such a configuration, the guide portion 54 can be more conveniently inserted into the lesion plaque that has been fractured.

The surface of the tip 541 away from the spiral portion 53 is configured as an arc surface. This configuration can prevent the tip 541 from damaging the blood vessel 200.

Please continue to refer to FIG. 1 and FIG. 5 . In some embodiments, the moving wire 50 is further provided with a connecting portion 55 . The spiral portion 53 is located between the guiding portion 54 and the connecting portion 55 . The connecting portion 55 is connected to the spiral portion 53 .

By adopting the above solution, the connection area between the spiral portion 53 and the moving wire 50 can be increased, thereby improving the connection strength between the two.

Please refer to FIG. 5 . In some embodiments, the spiral portion 53 is wound around the front end 52 ; or, one end of the spiral portion 53 is connected to the front end 52 .

By adopting the above solution, the structure of the spiral portion 53 can be made simpler, and it is convenient to process and assemble with the moving wire 50 .

In this embodiment, the spiral portion 53 is wound around the front end 52. This arrangement can make the spiral portion 53 and the moving wire 50 more tightly connected.

Please refer to FIG. 6 , optionally, the cross section of the spiral portion 53 along the direction perpendicular to the axis of the spiral portion 53 is rectangular, and the corners of the rectangle are chamfered. Such a configuration can not only prevent the spiral portion 53 from causing significant damage to the inner wall of the blood vessel 200, but also ensure that the spiral portion 53 can better pass through the already fractured diseased plaque, and ensure that the spiral portion 53 has a sufficiently large contact area with the fragmented plaque, so as to better bring the already lysed diseased plaque into the inner channel 13.

Optionally, the chamfer is set as a bevel or a rounded corner. In this embodiment, the chamfer is set as a rounded corner to better prevent the spiral portion 53 from damaging the inner wall of the blood vessel 200.

Please refer to Figures 1 and 5. In some of the embodiments, in order to ensure the effect of the spiral portion 53 in driving the fractured diseased plaques and at the same time avoid the accumulation of broken diseased plaques at the spiral portion 53, the pitch of the spiral portion 53 is 0.80mm-1.50mm, such as 0.80mm, 1.00mm, 1.20mm, 1.35mm or 1.50mm.

In order to avoid high processing difficulty of the spiral portion 53 and ensure the effect of the spiral portion 53 in driving the fracturing of the diseased plaque, the number of turns of the spiral portion 53 is greater than or equal to 2 and less than or equal to 5, such as 2, 3, 4 or 5.

Optionally, the nominal diameter of the balloon 20 is 1.05 mm-1.50 mm, such as 1.05 mm, 1.15 mm, 1.20 mm, 1.40 mm or 1.50 mm, etc. Such a configuration can ensure that the balloon 20 has better permeability in the blood vessel 200 and can reach the distal tortuous, complex and small diseased blood vessels 200, and can also ensure that the sound wave emitting unit 40 and the spiral portion 53 have a sufficiently large size, ensuring that the energy of the shock wave 401 released by the sound wave emitting unit 40 can fracture the diseased plaque of the occluded diseased part, and making the spiral portion 53 easier to process.

In this embodiment, the nominal length of the balloon 20 is 12 mm, the nominal diameter is 1.5 mm, and it is used for chronic total occlusion of the coronary artery. The number of turns of the spiral portion 53 is 3, the pitch is 1.0 mm, and the cross-section of the spiral portion 53 along the direction perpendicular to the axis of the spiral portion 53 is a chamfered rectangle.

Please refer to Figure 8. In another embodiment, the nominal length of the balloon 20 is 12 mm, the nominal diameter is 1.5 mm, it is used for chronic total occlusion of the coronary artery, the number of turns of the spiral portion 53 is 4, the pitch is 1.2 mm, and the cross-section of the spiral portion 53 along the direction perpendicular to the axis of the spiral portion 53 is a chamfered rectangle.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 . In some of the embodiments, the shock wave balloon catheter 100 further includes a developing ring 60 fixedly sleeved on the second end 12 . The developing ring 60 is located in the injection cavity 21 .

By adopting the above solution, the developing ring 60 can be used to better observe the condition of the lesion site.

Please refer to Figures 1, 2 and 5. In some embodiments, the shock wave balloon catheter 100 also includes a moving unit (not shown in the figures) connected to the end 51, and the moving unit is used to drive the moving wire 50 to rotate around the axis of the spiral portion 53, and the moving unit is used to drive the moving wire 50 to reciprocate along the axial direction of the first catheter 10.

By adopting the above solution, the moving unit can be used to automatically drive the moving wire 50 to rotate around the axis of the spiral portion 53, and at the same time, the moving unit can automatically drive the moving wire 50 to reciprocate along the axial direction of the first catheter 10, which is simple to operate and easy to use.

Optionally, the moving unit includes a rotating power member and a telescopic power member; the rotating power member is connected to the end 51, and is used to drive the moving wire 50 to rotate around the axis of the spiral portion 53. The rotating power member can be a motor or the like; the telescopic power member has a telescopic end, and the telescopic end is connected to the rotating power member. The telescopic power member is used to drive the rotating power member and the moving wire 50 to move back and forth along the axial direction of the first catheter 10. The telescopic power member can be a cylinder or the like.

It is understandable that the power supply, suction unit and moving unit of the acoustic wave emitting unit 40 can be integrated into one host.

The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims (9)

1. A balloon catheter, comprising:

A first duct having a first end provided with an inner passage extending in an axial direction of the first duct, the first end provided with a first inner nozzle communicating the inner passage with an outer space of the inner passage, and a second end provided with a second inner nozzle communicating the inner passage with an outer space of the inner passage, the inner passage further communicating with a suction unit;

The balloon is sleeved at the second end, and a liquid injection cavity is arranged between the balloon and the first catheter;

the second catheter is positioned at one side of the balloon close to the first end, the second catheter is sleeved on the first catheter, and the second catheter is provided with a liquid injection channel communicated with the liquid injection cavity;

the sound wave transmitting unit is arranged in the liquid injection cavity and is used for generating shock waves in the direction away from the first end in the liquid injection cavity; and

The movable wire is rotatably arranged in the inner channel and is provided with a tail end and a front end, the tail end extends to the outer space of the inner channel through the first inner pipe port, the front end is provided with a spiral part, the axis of the spiral part is parallel to the axial direction of the first catheter, and the spiral part can move to the outer space of the inner channel along the axial direction of the first catheter through the second inner pipe port;

The moving unit is connected with the tail end and used for driving the moving wire to rotate around the axis of the spiral part, and the moving unit is used for driving the moving wire to reciprocate along the axial direction of the first catheter.

2. The balloon catheter of claim 1, wherein the moving wire is provided with a guide portion on a side of the spiral portion facing away from the tip.

3. The balloon catheter of claim 2, wherein the moving wire is further provided with a connection portion, the spiral portion being located between the guide portion and the connection portion, the connection portion being connected with the spiral portion.

4. The balloon catheter of claim 1, wherein the spiral is wrapped around the front end; or one end of the spiral part is connected with the front end.

5. The balloon catheter of claim 1, wherein the spiral portion has a rectangular cross section in a direction perpendicular to an axis of the spiral portion, and corners of the rectangular are provided with chamfers.

6. The balloon catheter of claim 1, wherein the helical portion has a pitch of 0.80mm-1.50mm.

7. The balloon catheter of claim 6, wherein the number of turns of the spiral is greater than or equal to 2 and less than or equal to 5.

8. The balloon catheter of any one of claims 1-7, wherein the sound wave emitting unit comprises:

the distance between the two electrode heads is smaller than or equal to 0.6mm;

the pulse power supply is electrically connected with the electrode head through a wire, and the surface of the wire is coated with an insulating layer.

9. The balloon catheter of claim 1, wherein the mobile unit comprises:

the rotary power piece is connected with the tail end and is used for driving the movable wire to rotate around the axis of the spiral part;

the telescopic power piece is provided with a telescopic end, the telescopic end is connected with the rotary power piece, and the telescopic power piece is used for driving the rotary power piece and the movable wire to reciprocate along the axial direction of the first guide pipe together.