Bending-adjustable shock wave balloon catheter

Abstract

The bending-adjustable shock wave balloon catheter comprises an inner tube and an outer tube, the inner tube is arranged in the outer tube and extends out of the far end of the outer tube, the far end of the outer tube is provided with a balloon and a plurality of forward electrode pairs located in the balloon, the near end of the outer tube is connected with a tail seat, and the tail seat is connected with the inner tube. The outer pipe is provided with a bending adjusting handle used for achieving single-side bending adjusting or double-side bending adjusting. According to the embodiment of the invention, the electric arc is generated by applying the high voltage through the forward electrode pair, the shock wave is generated through the electric arc, and the compression stress of the shock wave can cause internal softening and splitting decomposition of the calcified tissue at the occluded part of the blood vessel, so that the catheter can conveniently penetrate through the occluded part of the blood vessel to achieve a good blood vessel opening effect; according to the embodiment of the invention, various bending modes can be realized so as to adapt to different blood vessel structures.

Description

Technical Field

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

[0002] Chronic total occlusion (CTO) is a term used to describe atherosclerotic vessels that are highly calcified to the point where the vessel lumen is completely blocked. CTOs can occur in the heart or in peripheral arteries and significantly increase the risk of heart failure and lower limb amputation. CTO cases in the operating room are also particularly challenging because the lesion is difficult to cross with a traditional guidewire, resulting in a nearly two-fold increase in procedure time and fluoroscopic exposure.

[0003] The advent of new technologies and devices has helped the heart team increase the chances of successful revascularization in patients with CTOs. Chief among these is a set of guidewire crossing techniques that follow a standard algorithm to accommodate varying lesion morphologies. Utilizing specially designed crossing guidewires, a skilled operator can cross a CTO in a greatly reduced time. Once crossed, standard angioplasty balloon dilatation and stenting can then be performed. However, a significant problem remains where the guidewire is able to cross the lesion, but the balloon angioplasty catheter cannot due to its larger profile. These lesions, known as balloon-crossable lesions, require the use of further specialized devices, known as crossing devices or penetrating catheters. These devices are tracked over the guidewire and, when reaching a balloon-impenetrable lesion, utilize various techniques to create a larger channel through which the balloon angioplasty catheter can pass.

[0004] Since the advent of chronic total occlusion lesion technology in percutaneous coronary intervention (CTO-PCI), many devices and techniques have been described over time. For example, a simple mechanical method using a high revolutions per minute (RPM) catheter to drill through the lesion, in addition to methods using laser and radiofrequency energy to ablate and eliminate calcified materials. In the present invention, the inventors propose a penetration system that uses forward shock wave energy to break up and disrupt calcified plaques so that the lesion balloon can pass through, while radial shock wave energy can again break up calcified plaques in the vessel wall to achieve balloon angioplasty.

[0005] 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 concentrated large calcification deposits, and cannot handle scattered calcifications or calcifications that penetrate 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.

[0006] Rapid balloon expansion can cause a sudden change in pressure on the blood vessel wall, which can easily damage the blood vessel and 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. Summary of the invention

[0007] The purpose of the embodiments of the present disclosure is to provide a shock wave balloon catheter with adjustable bend 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:

[0008] The disclosed embodiment provides a bendable shock wave balloon catheter, comprising an inner tube and an outer tube, wherein the inner tube is arranged inside the outer tube and extends from the distal end of the outer tube, a balloon and a plurality of forward electrode pairs located inside the balloon are arranged at the distal end of the outer tube, the proximal end of the outer tube is connected to a tail seat, and a bend adjustment handle for achieving unilateral or bilateral bend adjustment is arranged on the outer tube.

[0009] In some embodiments, the balloon is a compliant balloon, one end of which is fixed to the inner tube, and the other end of which is fixed to the outer tube.

[0010] In some embodiments, the outer tube is provided with an air hole for filling the balloon, and the distal end of the inner tube is blocked by a blocking section.

[0011] In some embodiments, the forward electrode pair includes an outer electrode and a plurality of inner electrodes, the outer electrode is cylindrical and disposed at the distal end of the outer tube, and the outer electrode and different inner electrodes form a plurality of the forward electrode pairs.

[0012] In some embodiments, an inner tube through hole for the inner tube to pass through and an electrode through hole for coaxially fixing the inner electrode are provided on the bottom surface of the outer electrode.

[0013] In some embodiments, the outer electrode is disposed on the outer tube via a positioning ring, the positioning ring is disposed at the distal end of the outer tube, and the outer electrode is disposed outside the positioning ring.

[0014] In some embodiments, the positioning ring adopts a cylindrical structure, and a channel is arranged on the bottom surface thereof, and the channel is arranged corresponding to the inner tube through hole and the electrode through hole on the outer electrode.

[0015] In some embodiments, a groove is provided on the wall surface of the outer electrode, a pull wire is provided in the groove, and the groove cooperates with the pull wire to achieve single-side bending or double-side bending to form different catheter bends.

[0016] In some embodiments, the bending angle of the unilateral bending includes a range of 0-180°, and the bending diameter of the catheter when it is bent to 180° is 10-60 mm.

[0017] In some embodiments, the bending angle of the bilateral bending includes a range of -180° to 180°, and the bending diameter of the catheter when it is bent to 180° is 10-60 mm.

[0018] The embodiment of the present disclosure applies a high voltage to the forward electrode pair to generate an arc, and the electric arc is used to generate a shock wave. The compressive stress of the shock wave will cause the calcified tissue inside the occluded blood vessel to soften and lyse, thereby facilitating the catheter to pass through the occluded blood vessel to achieve a good effect of opening the blood vessel. In addition, the embodiment of the present disclosure can also achieve a variety of bending adjustment methods to adapt to different blood vessel structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic structural diagram of an adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0021] Figure 2 It is a schematic structural diagram of a balloon in an adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0022] Figure 3 It is a schematic diagram of the connection of the balloon in the adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0023] Figure 4 It is a schematic diagram of the connection of the outer electrodes in the adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0024] Figure 5 It is a schematic structural diagram of the outer electrode in the adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0025] Figure 6 It is a schematic diagram of the connection of the inner electrodes in the adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0026] Figure 7 It is a schematic structural diagram of a positioning ring in an adjustable-bend shock wave balloon catheter according to an embodiment of the present disclosure;

[0027] Figure 8 Schematic diagram of unilateral bending adjustment and bilateral bending adjustment of the adjustable shock wave balloon catheter according to an embodiment of the present disclosure;

[0028] Fig. 9 This is a schematic diagram of the adjustable-bend shock wave balloon catheter before breaking up a plaque according to an embodiment of the present disclosure;

[0029] Fig.10 It is a schematic diagram of the adjustable shock wave balloon catheter after breaking up the plaque according to an embodiment of the present disclosure.

[0030] Reference numerals:

[0031] 100-shock wave balloon catheter; 101-balloon; 102. outer tube; 103-stress relief tube; 104-bending handle; 105-cable; 106-catheter plug; 107-tail seat; 108-outer electrode; 108a-first through hole; 108b-second through hole; 108c-third through hole; 108d-fourth through hole; 109-balloon air hole; 110-groove; 111-positioning ring; 111a first through hole; 111b second through hole ; 111c third through hole; 111d fourth through hole; 112a first inner electrode; 112b second inner electrode; 112c third inner electrode; 113a first wire; 113b second wire; 113c third wire; 114- fourth wire; 115- first fixed point; 116- second fixed point; 118- inner tube; 123- blood vessel; 124- blood vessel wall; 125- occluded plaque; 126- forward shock wave; 127- broken plaque. DETAILED DESCRIPTION

[0032] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0033] 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.

[0034] 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.

[0035] 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 accompanying drawings.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The present disclosure provides an adjustable shock wave balloon catheter 100, such as Figure 1-Figure 8 As shown, the shock wave balloon catheter 100 is used for vascular perforation and angioplasty. Figure 1 As shown, the shock wave balloon catheter 100 includes an inner tube 118 and an outer tube 102, wherein the inner tube 118 is arranged inside the outer tube 102 and extends from the distal end of the outer tube 102. Here, the effective length of the outer tube 102 is 50-150 cm, and the diameter of the outer tube 102 is 1-3 mm.

[0041] In order to achieve the function of vascular support, a balloon 101 is arranged at the distal end of the outer tube 102, and the balloon 101 expands after being filled. The proximal end of the outer tube 102 is connected to the tail seat 107, and a bending handle 104 is arranged on the outer tube 102 for achieving unilateral or bilateral bending.

[0042] The bending handle 104 is connected to the outer tube 102 via the stress relief tube 103, and the bending handle 104 is used to control the distal end of the outer tube 102 to achieve bending. In addition, the shock wave balloon catheter also includes a cable 105 and a catheter plug 106, and the catheter plug 106 is used to insert the catheter after opening the blood vessel.

[0043] Further, the balloon 101 is arranged at the distal end of the outer tube 102, where one end of the balloon 101 is fixed on the inner tube 118 to form a first fixing point 115, where the fixing method can be gluing, welding, binding, etc.; the other end of the balloon 101 is fixed on the outer tube 102 to form a second fixing point 116, where the fixing method can be gluing, welding, binding, etc. The balloon 101 can be stably arranged at the distal end of the outer tube 102 through the two fixing points without movement.

[0044] The balloon 101 in this embodiment can be a compliant balloon, and the balloon 101 can be made of soft materials such as natural latex, silicone, TPU, etc. The effective length of the balloon 101 after being filled and expanded is 3-18 mm, and its diameter can reach 2-12 mm.

[0045] The balloon 101 covers the distal end of the outer tube 102. The outer tube 102 is provided with an air hole 109, through which the balloon 101 is filled. The air hole 109 can be formed by laser drilling, drilling, etc. The distal end of the inner tube 118 is blocked by a blocking section to ensure that the balloon 101 can be filled smoothly.

[0046] Further, a plurality of forward electrode pairs are arranged at the distal end of the outer tube 102, and the plurality of forward electrode pairs are arranged in the balloon 101, wherein the forward electrode pairs include an outer electrode 108 and a plurality of inner electrodes, the outer electrode 108 is arranged at the distal end of the outer tube 102, and the outer electrode 108 and the different inner electrodes form a plurality of forward electrode pairs, wherein the outer electrode 108 and the inner electrode here correspond to connecting wires, and these wires are connected to the cable 105, wherein the outer electrode 108 is connected to the outer electrode wire. The forward electrode pairs can send shock waves in a directionally manner, thereby ensuring the action position of the shock wave and reducing the damage of the shock wave energy.

[0047] Specifically, an outer electrode 108 is disposed at the distal end of the outer tube 102. The outer electrode 108 is cylindrical, has a diameter of 0.1-1.0 mm, and a wall thickness of 0.03-0.3 mm. The outer electrode 108 of this embodiment can be made of stainless steel, tungsten, platinum iridium, nickel, iron, steel, and / or other conductive materials.

[0048] The bottom surface of the outer electrode 108 is provided with an inner tube through hole for the inner tube 118 to pass through and an electrode through hole for fixing the inner electrode. In this embodiment, the bottom surface of the outer electrode 108 is provided with a first through hole 108a, a second through hole 108b, a third through hole 108c and a fourth through hole 108d. Here, the fourth through hole 108d serves as the inner tube through hole and is located at the center of the bottom surface. It is used to pass the inner tube 118. The diameter of the fourth through hole 108d can be 0.2mm-2.0mm; the first through hole 108a, the second through hole 108b and the third through hole 108c serve as the electrode through holes and are evenly distributed on the bottom surface of the outer electrode 108 for coaxially fixing the inner electrode, and the inner electrode is connected to the inner electrode wire. The diameter of the electrode through hole here can be 0.2mm-1.0mm, so that the outer electrode 108 and different inner electrodes form a plurality of forward electrode pairs that generate and emit forward shock waves. It should be noted that the number of the electrode through holes here matches the number of the inner electrodes. Preferably, the number of the forward electrode pairs may be 1-8 pairs.

[0049] The forward electrode pair here is particularly wrapped by the balloon 101. There is a cavity for liquid to flow in between the outer tube 102 and the inner tube 118 connected to the balloon 101, which is used to fill the interior of the balloon 101 with liquid and apply a certain pressure to fill the balloon 101. When the balloon 101 is filled, it emits shock waves through the forward electrode pair.

[0050] In addition, this embodiment can also selectively excite different forward electrode pairs to send shock waves. For example, a certain forward electrode pair can be selected to send shock waves, or the forward electrode pairs can be excited in sequence, or all the forward electrode pairs can be excited at the same time, which greatly facilitates the operator's operation during the operation.

[0051] In this embodiment, the first inner electrode 112a, the second inner electrode 112b and the third inner electrode 112c are respectively inserted into the first through hole 108a, the second through hole 108b and the third through hole 108c, and the first inner electrode 112a, the second inner electrode 112b and the third inner electrode 112c are respectively connected to the first wire 113a, the second wire 113b and the third wire 113c. In addition, the outer electrode 108 is connected to the fourth wire 114. The first wire 113a, the second wire 113b, the third wire 113c and the fourth wire 114 in this embodiment extend to the proximal end of the outer tube 102 to be connected to the cable 105.

[0052] The assembly between the inner electrode, the outer electrode 108 and the outer tube 102 here needs to ensure that the three are coaxial, wherein the electrical connection between the outer electrode 108 and the outer electrode wire can be achieved by brazing, laser welding, resistance welding, conductive silver paste connection, etc.; the electrical connection between the inner electrode and the corresponding inner electrode wire can be achieved by brazing, laser welding, resistance welding, conductive silver paste connection, etc.

[0053] Further, the outer electrode 108 is arranged on the outer tube 102 through a positioning ring 111, wherein the positioning ring 111 is arranged at the distal end of the outer tube 102, and the outer electrode 108 is arranged outside the positioning ring 111. The positioning ring 111 here is made of polyethylene, polypropylene, polycarbonate, Peek, nylon 12, nylon 66, polyurethane, polyimide, PET and the like.

[0054] The positioning ring 111 also adopts a cylindrical structure similar to the outer electrode 108, and a channel is arranged on the bottom surface thereof, and the channel is arranged corresponding to the inner tube through hole and the electrode through hole on the outer electrode 108. In this embodiment, for example, the bottom surface of the positioning ring 111 is provided with a first channel 111a, a second channel 111b, a third channel 111c, and a fourth channel 111d corresponding to the first through hole 108a, the second through hole 108b, the third through hole 108c, and the fourth through hole 108d, respectively, wherein the first channel 111a, the second channel 111b, and the third channel 111c are used to coaxially fix the inner electrode, and it is necessary to ensure that the number of the channels used to fix the inner electrode is consistent with the number of the electrode through holes on the outer electrode 108.

[0055] like Fig. 9 and Fig.10 As shown, when this embodiment is applied in a blood vessel 123, there is an occluded plaque 125 on the vascular wall 123 of the blood vessel 123, and the cooperation of the outer electrode 108 and the inner electrode forms an opening forward electrode pair, which can be compatible with the advantages of the plaque opening electrode pair and the plaque crushing electrode pair. The forward shock wave 126 is emitted by the forward electrode pair to crush the occluded plaque 125 and form a crushed plaque 127, so that the catheter can smoothly pass through the lesion position with a higher degree of stenosis.

[0056] Specifically, the distal end of the balloon 101 can be closely fitted forward with the obstruction plaque 125 in the blood vessel 123, and an arc is generated by applying an instantaneous high voltage to the forward electrode pair inside the balloon 101. Shock waves accompanying the expansion and collapse of bubbles generated by the arc are generated, and the shock waves generated by the forward electrode pair are radially transmitted to the surface of the balloon 101 through the liquid inside the balloon 101, and then transmitted to the calcified lesion through the surface of the balloon 101. When the shock wave is transmitted forward to the calcified lesion, the compression stress of the shock wave will cause the calcified tissue inside the occluded part of the blood vessel 123 to soften and lyse, so that the shock wave balloon catheter can pass through the vascular occlusion to achieve a good effect of opening the blood vessel. Here, the shock wave of appropriate intensity can meet the requirements of destroying the calcified tissue without generating additional burden on the soft tissue around the calcified tissue.

[0057] Furthermore, in order to realize the bending function of the shock wave balloon catheter, a groove 110 is provided on the wall surface of the outer electrode 108, the notch of the groove 110 faces the proximal end of the outer tube 102, and the width of the groove 110 is 0.1mm-0.6mm, and the length is 0.5mm-5mm. A pull wire is provided in the groove 110, and the material of the pull wire can be stainless steel, tungsten, platinum iridium, nickel, iron, steel and / or other materials. Here, the shock wave balloon catheter has a bending function by connecting the groove 110 with the pull wire, and the bending can smoothly deliver the catheter to a blood vessel that is too tortuous.

[0058] The groove 110 and one end of the pull wire can be connected by brazing, laser welding, resistance welding, gluing, etc. The other end of the pull wire is connected to the bending handle 104. The bending handle 104 is operated to control the pull wire, so that the distal end of the outer tube 102 is pulled by the pull wire to achieve bending. The length of the pull wire is 50-150cm, and the cross section of the pull wire is rectangular, the length of the cross section is 0.003-0.020, and the width is 0.001-0.010.

[0059] Here, by setting different numbers and positions of the grooves 110 on the outer electrode 108, single-sided bending or double-sided bending can be achieved to form different catheter bends. For example, by setting one groove 110 on the outer electrode 108 to cooperate with the pull wire, single-sided bending can be achieved by cooperating with the pull wire, and by setting two grooves 110 on the outer electrode 108 to cooperate with the corresponding pull wires, double-sided bending can be achieved, wherein the bending angle of single-sided bending is 0-180°, and the bending diameter of the catheter when it is bent to 180° is 10-60mm, and the bending angle of double-sided bending is -180°~180°. By setting the length of the adjustable bending section, the bending diameter of the catheter when it is bent to 180° is controlled to be 10-60mm.

[0060] The embodiment of the present disclosure applies a high voltage to the forward electrode pair to generate an arc, and the electric arc is used to generate a shock wave. The compressive stress of the shock wave will cause the calcified tissue inside the occluded blood vessel to soften and lyse, thereby facilitating the catheter to pass through the occluded blood vessel to achieve a good effect of opening the blood vessel. In addition, the embodiment of the present disclosure can also achieve a variety of bending adjustment methods to adapt to different blood vessel structures.

[0061] 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.

[0062] 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.

[0063] 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 balloon catheter with adjustable bend, characterized in that: The invention comprises an inner tube and an outer tube, wherein the inner tube is arranged inside the outer tube and extends out from the distal end of the outer tube, a balloon and a plurality of forward electrode pairs located inside the balloon are arranged at the distal end of the outer tube, the proximal end of the outer tube is connected to the tail seat, and a bending handle for realizing unilateral bending or bilateral bending is arranged on the outer tube.

2. The shock wave balloon catheter according to claim 1, characterized in that: The balloon is a compliant balloon, one end of which is fixed on the inner tube, and the other end of which is fixed on the outer tube.

3. The shock wave balloon catheter according to claim 1, characterized in that: The outer tube is provided with an air hole for filling the balloon, and the distal end of the inner tube is blocked by a blocking section.

4. The shock wave balloon catheter according to claim 1, characterized in that: The forward electrode pair includes an outer electrode and a plurality of inner electrodes. The outer electrode is cylindrical and is arranged at the distal end of the outer tube. The outer electrode and different inner electrodes form a plurality of forward electrode pairs.

5. The shock wave balloon catheter according to claim 4, characterized in that: An inner tube through hole for the inner tube to pass through and an electrode through hole for coaxially fixing the inner electrode are arranged on the bottom surface of the outer electrode.

6. The shock wave balloon catheter according to claim 4, characterized in that: The outer electrode is arranged on the outer tube through a positioning ring, the positioning ring is arranged at the distal end of the outer tube, and the outer electrode is arranged outside the positioning ring.

7. The shock wave balloon catheter according to claim 6, characterized in that: The positioning ring adopts a cylindrical structure, and a channel is arranged on the bottom surface thereof. The channel is arranged corresponding to the inner tube through hole and the electrode through hole on the outer electrode.

8. The shock wave balloon catheter according to claim 4, characterized in that: A groove is arranged on the wall surface of the outer electrode, a pull wire is arranged in the groove, and the groove cooperates with the pull wire to realize single-side bending or double-side bending to form different catheter bends.

9. The shock wave balloon catheter according to claim 8, characterized in that: The bending angle of the unilateral bending includes a range of 0-180°, and the bending diameter of the catheter when it is bent to 180° is 10-60mm.

10. The shock wave balloon catheter according to claim 8, characterized in that: The bending angle of the bilateral bending includes a range of -180° to 180°, and the bending diameter of the catheter when it is bent to 180° is 10-60 mm.

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