Shock wave multi-balloon catheter

Abstract

The embodiment of the invention provides a shock wave multi-balloon catheter which comprises a first catheter body, a balloon part is arranged at the far end of the first catheter body, the balloon part at least comprises two balloons, and the shock wave multi-balloon catheter is characterized in that at least one electrode pair is arranged in each balloon and used for emitting shock waves in the designated direction, and the electrode pairs are used for emitting the shock waves in the designated direction. A tailstock is arranged at the near end of the first tube body, and the electrode pair is connected with a shock wave generator through the tailstock. By means of the plaque opening electrode pair and the plaque crushing electrode pair, blood vessel plaques located in the front and on the side can be effectively crushed, the catheter can smoothly pass through the lesion position with the high stenosis degree, and operation of an operator in an operation is greatly facilitated.

Description

Technical Field

[0001] The present disclosure relates to the field of medical devices, and in particular to a shock wave multi-balloon catheter. Background Art

[0002] Vascular stenosis refers to the abnormal lipid metabolism in the human arteries and veins, including the coronary, peripheral, and intracranial blood vessels. The lipids in the blood are deposited on the originally smooth vascular endothelium and gradually accumulate into atherosclerotic lipid plaques. Over time, these plaques increase and even calcify, causing stenosis in the vascular lumen, obstructing blood flow, leading to ischemia of downstream blood vessels and the body, and producing corresponding clinical manifestations. If the stenosis occurs in the coronary arteries, it will cause palpitations, chest pain, dyspnea, and angina pectoris. In severe cases, it will lead to myocardial insufficiency or myocardial necrosis; if it occurs in the periphery, it will cause a decrease in skin epidermal temperature, muscle atrophy, intermittent claudication, and even necrosis or amputation of distal limbs. If it occurs in the skull, it will cause dizziness, syncope, and even brain tissue damage and brain dysfunction.

[0003] The existing angioplasty surgery is to place an expandable balloon in the blood vessel, and the mechanical stress of the rapid expansion of the balloon acts on the calcification to break it up. However, balloon dilatation surgery is only suitable for large, centralized calcification deposits, and cannot handle calcification foci that are dispersed or deep into the ventricle. The calcium removal efficiency is low and incomplete. If the patient's arterial calcification is more serious, or the narrowed blood vessel segment is longer, the effect of balloon dilatation is relatively poor.

[0004] Rapid balloon expansion can cause a sudden change in pressure on the blood vessel wall, which can easily damage the blood vessel or even cause thrombosis. In addition, balloon expansion requires very high pressure (sometimes the pressure can reach 20 to 30 standard atmospheres, or even 40 standard atmospheres). Such pressure usually leads to a significantly increased probability of rebound stenosis, dissection, perforation, and rupture of the blood vessels. Such surgical events are particularly serious in cases of eccentric calcified lesions because the pressure of the balloon acts on soft tissue that is not calcified. When the patient's intravascular plaque is harder and the degree of stenosis is more severe, it is possible that the balloon cannot pass through the calcified area at all, let alone have a therapeutic effect. Therefore, more effective medical devices are needed to solve this problem. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a shock wave multi-balloon catheter to solve the problems existing in the prior art. In order to solve the technical problems, the embodiments of the present disclosure adopt the following technical solutions:

[0006] The disclosed embodiment provides a shock wave multi-balloon catheter, which includes a first tube body, a balloon portion is arranged at the distal end of the first tube body, the balloon portion includes at least two balloons, at least one electrode pair is arranged inside each of the balloons, the electrode pair is used to emit shock waves in a specified direction, and a tail seat is arranged at the proximal end of the first tube body, and the electrode pair is connected to the shock wave generator through the tail seat.

[0007] In some embodiments, when there are multiple balloons, the multiple balloons are sequentially arranged at the distal end of the first tube.

[0008] In some embodiments, when there are multiple balloons, different electrode pairs are set in different balloons.

[0009] In some embodiments, the balloon portion includes a first balloon and a second balloon which are arranged in sequence, and the first balloon is arranged closer to an end of the first tube body.

[0010] In some embodiments, a second tube body is further included, wherein the second tube body is disposed at an end of the first tube body, and a diameter of the first tube body is greater than a diameter of the second tube body.

[0011] In some embodiments, the first balloon is disposed at the connection between the first tube body and the second tube body.

[0012] In some embodiments, the first balloon is a compliant balloon, and the second balloon is a semi-compliant or non-compliant balloon.

[0013] In some embodiments, the first balloon is made of at least one material selected from the group consisting of natural latex, silicone, and TPU, and the second balloon is made of at least one material selected from the group consisting of PET, nylon, polyethylene, polyamide, or modified polyamide.

[0014] In some embodiments, the plurality of electrode pairs include a first electrode pair, a second electrode pair, and a third electrode pair, the first electrode pair being located inside the first balloon, the second electrode pair and the third electrode pair being located inside the second balloon, the first electrode pair being used to send shock waves forward, and the second electrode pair and the third electrode pair being used to send shock waves radially / forward.

[0015] In some embodiments, the first electrode pair includes a first inner electrode, a first outer electrode and an insulating layer, the first inner electrode is cylindrical and embedded in the end surface of the first tube body, and the first outer electrode is disposed on the outer surface of the end of the first tube body.

[0016] In some embodiments, the first outer electrode is in the shape of a hollow cylinder having a plurality of openings, wherein the opening at the center of the circle is used for passing a guide wire, and the first inner electrode passes through the remaining openings on the first outer electrode and is aligned with the first outer electrode.

[0017] In some embodiments, the second electrode pair or the third electrode pair includes a second inner electrode, a limiting ring and a second outer electrode, the second inner electrode is in the shape of a disc, the second outer electrode is fixed on the outer surface of the first tube body, and the second inner electrode is fixed by the second outer electrode through the limiting ring.

[0018] In some embodiments, a guidewire cavity, at least one fluid cavity and at least one conductive wire cavity are coaxially disposed in the first tubular body.

[0019] In some embodiments, each of the balloons is in communication with the corresponding fluid chamber, and the electrode pair in each of the balloons is in communication with the corresponding conductive wire chamber.

[0020] In some embodiments, the first tube body includes a guidewire cavity, and a first fluid cavity, a second fluid cavity, a first conductive wire cavity and a second conductive wire cavity are arranged around the guidewire cavity, the first fluid cavity is connected to the first balloon, the second fluid cavity is connected to the second balloon, the first conductive wire cavity is connected to the first electrode pair, and the second conductive wire cavity is connected to the second electrode pair and the third electrode pair.

[0021] In some embodiments, a through hole for fluid to pass through is provided at a designated position on the first tube body, and the fluid cavity is connected with the balloon through the through hole.

[0022] In some embodiments, one end of the tailstock is connected to the first tube body through a stress relief tube, and the other end of the tailstock is connected to an adapter through a cable.

[0023] In some embodiments, the tailstock includes a plurality of side walls, which are used to respectively connect to the balloon portion and the electrode pair in the balloon portion through the fluid cavity and the conductive wire cavity in the first tube body.

[0024] In some embodiments, the tail stock includes a first side wall, a second side wall and a third side wall, the first side wall is connected to the first balloon through the fluid cavity, the second side wall is connected to the second balloon through the fluid cavity, and the third side wall is connected to the plurality of conductive wire cavities.

[0025] The disclosed embodiment can effectively break up the vascular plaques located in the front and sides through the plaque opening electrode pair and the plaque breaking electrode pair, so that the catheter can smoothly pass through the lesion site with a higher degree of stenosis, greatly facilitating the operator's operation during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, 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 recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic structural diagram of a shock wave multi-balloon catheter according to an embodiment of the present disclosure;

[0028] Figure 2 This is a schematic diagram of the internal structure of the first tube body in the shock wave multi-balloon catheter of the embodiment of the present disclosure;

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the first tube body in the shock wave multi-balloon catheter according to an embodiment of the present disclosure;

[0030] Figure 4 It is a schematic structural diagram of a first electrode pair in a shock wave multi-balloon catheter according to an embodiment of the present disclosure;

[0031] Figure 5 It is a schematic structural diagram of a first electrode pair in a shock wave multi-balloon catheter according to an embodiment of the present disclosure;

[0032] Figure 6 It is a schematic structural diagram of the tail seat in the shock wave multi-balloon catheter according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0034] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0035] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0036] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0037] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0038] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0039] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0040] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0041] The present disclosure provides a shock wave multi-balloon catheter, such as Figures 1 to 6 As shown, the shock wave multi-balloon catheter can be used as a valvuloplasty dilatation catheter, which is used to filter and capture broken or vulnerable aortic plaques or formed thrombi produced during valvuloplasty dilatation surgery, and is therefore a medical device that can provide immediate protection during medical surgery.

[0042] like Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram showing the structure of the shock wave multi-balloon catheter is shown. Figure 2 A schematic structural diagram of the distal end of the shock wave multi-balloon catheter is shown. The shock wave multi-balloon catheter in this embodiment is particularly used for opening occluded blood clots and for vascular plasty, and includes a first tube body 102 and a second tube body 113. The second tube body 113 is arranged at the distal end of the first tube body 102, that is, the first tube body 102 is closer to the operator than the second tube body 113, wherein the tube body diameter of the first tube body 102 is greater than the diameter of the second tube body 113, and the tube body diameter of the first tube body 102 here is set to 1.0-2.5mm.

[0043] Furthermore, the first tube body 102 adopts a hollow multi-lumen tube structure. Specifically, a guidewire cavity, at least one fluid cavity and at least one conductive wire cavity are coaxially arranged in the first tube body 102. The guidewire cavity can be arranged in the middle of the cross-section of the first tube body 102, and the fluid cavity and the conductive wire cavity are arranged around the guidewire cavity, wherein the guidewire cavity here is used to pass and allow a guidewire to pass through, for example, it can accommodate a guidewire of a size of 0.014-0.035 inches; the fluid cavity is used for fluid to pass through, and the diameter of each of the fluid cavities here can be set to 0.2-1.0 mm; the conductive wire cavity is used to accommodate a conductive wire, and the diameter of each of the conductive wire cavities here can be set to 0.2-1.0 mm.

[0044] Further, a balloon portion is provided at the distal end of the first tube body 102, wherein the balloon portion is provided on the first tube body 102 and includes at least one balloon, wherein, when there are multiple balloons, the multiple balloons are sequentially provided at the distal end of the first tube body 102 along the length direction of the first tube body 102. The number of the balloons here corresponds to the number of the fluid chambers, and each balloon is connected to the corresponding fluid chamber so that fluid is transported to the balloon through the fluid chamber, and the balloon is expanded and inflated in the blood vessel after the fluid is transported.

[0045] Furthermore, a through hole for fluid to pass through is provided at a designated position on the first tube 102, and the fluid cavity is connected to the corresponding balloon through the through hole, so that the interior of the balloon is injected with fluid, thereby filling the balloon to achieve expansion. Here, after the balloon is filled, at least a portion of its outer surface contacts the blood vessel wall and the vascular calcification lesion area.

[0046] Furthermore, at least one electrode pair is arranged inside the balloon, and the electrode pair is used to emit shock waves in a specified direction, and the shock waves can break up blocky obstructions in blood vessels, etc. In one embodiment, a plurality of low-profile electrode pairs are arranged inside the balloon. In addition, when there are a plurality of balloons, different numbers of electrode pairs can be arranged in different balloons, wherein the electrode pair in each balloon is connected to the corresponding conductive wire cavity, and the conductive wire cavity accommodates the wire for the electrode pair.

[0047] By applying an instantaneous high voltage to the electrode pair inside the balloon to generate an arc, the expansion and collapse of the bubble generated by the arc is accompanied by the generation of shock waves. The shock waves generated by the electrode pair are radially transmitted to the surface of the balloon through the fluid inside the balloon, and then transmitted to the calcified lesion through the surface of the balloon. When the shock wave is transmitted to the calcified lesion, the compression stress of the shock wave will cause the calcified tissue in the calcified lesion to soften, lyse or break the calcium deposits. The shock wave of appropriate intensity can satisfy the destruction of the calcified tissue without generating additional burden on the soft tissue around the calcified tissue.

[0048] Continue as Figure 1 As shown, a tail stock 104 is provided at the proximal end of the first tube body 102, and the tail stock 104 is connected to the proximal end of the first tube body 102 through a stress relief tube 103. The stress relief tube 103 here can be used for stress adjustment. It should be noted that the distal end here refers to the end of the first tube body 102 away from the operator, and the proximal end refers to the end of the first tube body 102 close to the operator.

[0049] Furthermore, the tailstock 104 is connected to an adapter 106 via a cable 105 , and the adapter 106 is connected to a shock wave generator, and the shock wave generator transmits energy to the electrode pair via the adapter 106 and the wire.

[0050] Further, in Figure 2 In the embodiment shown in , the number of the balloons here can be determined according to needs, for example, including a first balloon 100 and a second balloon 101 arranged in sequence, wherein the first balloon 100 is arranged at the end of the first tube body 102, for example, it can be arranged between the first tube body 102 and the second tube body 113, and part of it is arranged on the outside of the end of the first tube body 102, and part of it is arranged on the outside of the second tube body 113, and the second balloon 101 is arranged on the first tube body 102 and completely arranged on the outside of the first tube body 102.

[0051] The first balloon 100 here is preferably a compliant balloon, which has good telescopic, expansion and insulation properties, and does not need to be folded, so the deformation of the end of the first tube 102 can be significantly reduced. The first balloon 100 here can be made of soft materials such as natural latex, silicone, TPU, etc. The first balloon 100 made of the above materials has better adaptability.

[0052] The second balloon 101 here is a semi-compliant or non-compliant balloon, and a high pressure (e.g., 10-30 ATM) can be applied to the second balloon 101, which can be used to expand the vascular calcification lesion area. The second balloon 102 here is made of polymer materials such as PET (polyethylene terephthalate), nylon, polyethylene, polyamide or modified polyamide (block polyamide resin).

[0053] like Figure 2 As shown, when the balloon includes a first balloon 100 and a second balloon 101, a plurality of electrode pairs can be correspondingly arranged in the first balloon 100 and / or the second balloon 101, wherein the electrode pairs here send directional shock waves in a predetermined direction, and the position setting of the electrode pairs can ensure the position of the shock wave, thereby reducing the damage caused by the shock wave energy. In this embodiment, the plurality of electrode pairs here include, for example, a first electrode pair 107, a second electrode pair 108a, and a third electrode pair 108b. Among them, the first electrode pair 107 is located inside the first balloon 100, and the second electrode pair 108a and the third electrode pair 108b are located inside the second balloon 101. In another embodiment, a fourth electrode pair or more electrode pairs can also be arranged in the second balloon 101 along the length direction of the first tube 102, so that the calcified plaque along the length of the blood vessel can be more easily crushed by the electrode pairs through shock waves.

[0054] Since the electrode pair sends directional shock waves in a predetermined direction, in the present embodiment, the first electrode pair 107 can be used as a plaque opening electrode pair, which can send shock waves forward to break up the plaque located in the front, so that the first tube body 102 and the second tube body 113 can smoothly pass through the lesion position with a higher degree of stenosis to achieve the opening function. The second electrode pair 108a and the third electrode pair 108b can be used as a plaque breaking electrode pair, which can send shock waves radially to break up the vascular plaque located laterally. Of course, the second electrode pair 108a and the third electrode pair 108b can also send shock waves forward based on different structures.

[0055] It should be noted that different electrode pairs can be selectively stimulated to send shock waves. The operator can choose any electrode pair to send shock waves, or stimulate different electrode pairs in sequence, or stimulate all electrode pairs at the same time, which greatly facilitates the operator's operation during the operation.

[0056] Accordingly, since the first balloon 100 and the second balloon 101 are provided in the present embodiment, and the corresponding electrode pair is provided in each of the balloons, in one embodiment, the first tube body 102 includes a guidewire cavity 120, and a first fluid cavity 118, a second fluid cavity 119, a first conductive wire cavity 121 and a second conductive wire cavity 122 are provided around the guidewire cavity 120, wherein the first fluid cavity 118 is connected to the first balloon 100, the second fluid cavity 119 is connected to the second balloon 101, the first conductive wire cavity 121 is connected to the first electrode pair 107, and the second conductive wire cavity 122 is connected to the second electrode pair 108a and the third electrode pair 108b.

[0057] The structures of the first electrode pair 107 , the second electrode pair 108 a and the third electrode pair 108 b are further described below.

[0058] Furthermore, if Figure 4 and Figure 5 As shown, the first electrode pair 107 includes a first inner electrode 115, a first outer electrode 116 and an insulating layer, wherein the first inner electrode 115 is embedded in the end surface of the distal end of the first tube 102, wherein the first inner electrode 115 is cylindrical, and its length is set to 0.1-1.0 mm, and its diameter is set to 0.1-0.7 mm; the first outer electrode 116 is arranged on the outer surface of the end of the first tube 102, wherein the first outer electrode 116 is a hollow cylindrical shape, having a plurality of openings, wherein the opening at the center of the circle can be used to pass a guide wire, wherein the first inner electrode 115 passes through the remaining openings on the first outer electrode 116 and is aligned with the second outer electrode 116. The inner diameter of the first outer electrode 116 is set to 0.5-1.5 mm, and the wall thickness is set to 0.03-0.2 mm. In addition, the electrode materials of the first inner electrode 115 and the first outer electrode 116 can be stainless steel, tungsten, platinum iridium, nickel, iron, steel and / or other conductive materials.

[0059] Furthermore, the second electrode pair 108a and the third electrode pair 108b have the same structure, wherein each of the second electrode pair 108a and the third electrode pair 108b includes a second inner electrode, a limiting ring and a second outer electrode, wherein the limiting ring can limit the position of the second inner electrode to ensure the concentric arrangement of the second inner electrode and the second outer electrode, and this configuration of inner and outer electrodes allows the first tube body 102 to have a smaller outer diameter and have the function of sending shock waves forward and laterally.

[0060] Specifically, the third electrode pair 108b is taken as an example for a specific introduction. The third electrode pair 108b includes a second inner electrode 109, a limiting ring 111 and a second outer electrode 110. The second inner electrode 109 here is in the shape of a disc, and its diameter is set to 0.1-1.0mm, and its thickness is set to 0.03-0.3mm. The second electrode 109 here is fixed to the outer surface of the first tube body 102 by welding, gluing, riveting, etc. or any other suitable method; the second outer electrode 110 here is in the shape of a circular ring, and the second outer electrode 110b can surround the second inner electrode 109. The spacing between the second outer electrode 110 and the second inner electrode 109 here is 0.1-1.5mm. In addition, the material of the second inner electrode 109 and the second outer electrode 110 here can be stainless steel, tungsten, platinum iridium, nickel, iron, steel and / or other conductive materials.

[0061] Further, Figure 6 1 shows a schematic structural diagram of the tailstock 104, wherein the tailstock 104 includes a plurality of side walls, which are used to be connected to the balloon portion and the electrode pair in the balloon portion through the fluid cavity and the conductive wire cavity in the first tube 101, respectively, wherein Figure 6 In the embodiment, the tail seat 104 includes a first side wall 123, a second side wall 124 and a third side wall 125, wherein the first side wall 123 in the tail seat 104 is connected to the first balloon 100 through a fluid cavity, for which the first side wall 123 can be connected to a pusher, and fluid is injected through the pusher to control the expansion and contraction of the first balloon 100; the second side wall 124 in the tail seat 104 is connected to the second balloon 101 through a fluid cavity, for which the second side wall 124 can be connected to a pusher, and fluid is injected through the pusher to control the expansion and contraction of the second balloon 101; the third side wall 125 in the tail seat 104 is connected to a plurality of the conductive wire cavities to accommodate the conductive wires of different electrode pairs, and the other end of the third side wall 125 is connected to the adapter 106, where the adapter 106 is connected to the conductive wires in different conductive wire cavities to ensure that the shock wave multi-balloon catheter and the shock wave generator can be effectively electrically connected.

[0062] The disclosed embodiment can effectively break up the vascular plaques located in the front and sides through the plaque opening electrode pair and the plaque breaking electrode pair, so that the catheter can smoothly pass through the lesion site with a higher degree of stenosis, greatly facilitating the operator's operation during the operation.

[0063] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0064] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0065] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. A shock wave multi-balloon catheter, comprising a first tube body, a balloon portion is arranged at the distal end of the first tube body, the balloon portion comprises at least two balloons, characterized in that: At least one electrode pair is arranged inside each of the balloons, and the electrode pair is used to emit shock waves in a specified direction. A tail seat is arranged at the proximal end of the first tube body, and the electrode pair is connected to the shock wave generator through the tail seat.

2. The shock wave multi-balloon catheter according to claim 1, characterized in that: When there are multiple balloons, the multiple balloons are sequentially arranged at the distal end of the first tube.

3. The shock wave multi-balloon catheter according to claim 1, characterized in that: When there are multiple balloons, different electrode pairs are set in different balloons.

4. The shock wave multi-balloon catheter according to claim 1, characterized in that: The balloon portion includes a first balloon and a second balloon which are arranged in sequence, and the first balloon is arranged closer to the end of the first tube body.

5. The shock wave multi-balloon catheter according to claim 4, characterized in that: It also includes a second tube body, which is arranged at the end of the first tube body, and the diameter of the first tube body is larger than the diameter of the second tube body.

6. The shock wave multi-balloon catheter according to claim 5, characterized in that: The first balloon is disposed at the connection between the first tube body and the second tube body.

7. The shock wave multi-balloon catheter according to claim 4, characterized in that: The first balloon is a compliant balloon, and the second balloon is a semi-compliant or non-compliant balloon.

8. The shock wave multi-balloon catheter according to claim 7, characterized in that: The first balloon is made of at least one material selected from natural latex, silicone and TPU, and the second balloon is made of at least one material selected from PET, nylon, polyethylene, polyamide or modified polyamide.

9. The shock wave multi-balloon catheter according to claim 4, characterized in that: The multiple electrode pairs include a first electrode pair, a second electrode pair and a third electrode pair. The first electrode pair is located inside the first balloon, the second electrode pair and the third electrode pair are located inside the second balloon, the first electrode pair is used to send shock waves forward, and the second electrode pair and the third electrode pair are used to send shock waves radially / forward.

10. The shock wave multi-balloon catheter according to claim 9, characterized in that: The first electrode pair includes a first inner electrode, a first outer electrode and an insulating layer. The first inner electrode is cylindrical and embedded in the end surface of the first tube body. The first outer electrode is arranged on the outer surface of the end of the first tube body.

11. The shock wave multi-balloon catheter according to claim 10, characterized in that: The first outer electrode is in the shape of a hollow cylinder and has a plurality of openings. The opening at the center of the circle is used for passing a guide wire. The first inner electrode passes through the remaining openings on the first outer electrode and is aligned with the first outer electrode.

12. The shock wave multi-balloon catheter according to claim 9, characterized in that: The second electrode pair or the third electrode pair includes a second inner electrode, a limiting ring and a second outer electrode, the second inner electrode is in the shape of a disc, the second outer electrode is fixed to the outer surface of the first tube body, and the second inner electrode is fixed by the second outer electrode through the limiting ring.

13. The shock wave multi-balloon catheter according to claim 9, characterized in that: A guide wire cavity, at least one fluid cavity and at least one conductive wire cavity are coaxially arranged in the first tube body.

14. The shock wave multi-balloon catheter according to claim 13, characterized in that: Each of the balloons is in communication with the corresponding fluid chamber, and the electrode pair in each of the balloons is in communication with the corresponding conductive wire chamber.

15. The shock wave multi-balloon catheter according to claim 14, characterized in that: The first tube body includes a guidewire cavity, and a first fluid cavity, a second fluid cavity, a first conductive wire cavity and a second conductive wire cavity are arranged around the guidewire cavity. The first fluid cavity is connected to the first balloon, the second fluid cavity is connected to the second balloon, the first conductive wire cavity is connected to the first electrode pair, and the second conductive wire cavity is connected to the second electrode pair and the third electrode pair.

16. The shock wave multi-balloon catheter according to claim 13, characterized in that: A through hole for fluid to pass through is arranged at a designated position on the first tube body, and the fluid cavity is connected with the balloon through the through hole.

17. The shock wave multi-balloon catheter according to claim 13, characterized in that: One end of the tailstock is connected to the first tube body through a stress relief tube, and the other end of the tailstock is connected to a converter through a cable.

18. The shock wave multi-balloon catheter according to claim 13, characterized in that: The tailstock includes a plurality of side walls, which are used to be connected to the balloon portion and the electrode pair in the balloon portion through the fluid cavity and the conductive wire cavity in the first tube body.

19. The shock wave multi-balloon catheter according to claim 18, characterized in that: The tailstock includes a first side wall, a second side wall and a third side wall. The first side wall is connected to the first balloon through the fluid cavity, the second side wall is connected to the second balloon through the fluid cavity, and the third side wall is connected to the plurality of conductive wire cavities.

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