A shockwave dual-balloon electrode catheter

Abstract

This disclosure provides a shockwave dual-balloon electrode catheter, including an inner tube and an outer tube. The inner tube is disposed within the outer tube and extends from its distal end. The proximal end of the outer tube is connected to a tailstock, which is connected to an adapter via a cable. A first balloon and a second balloon are disposed on the inner tube. The first balloon is located at the distal end of the inner tube, and the second balloon is located on the section of the inner tube extending from the outer tube. At least one forward electrode pair for emitting shock waves is disposed at the distal end of the inner tube, and at least one radial electrode pair for emitting shock waves is disposed on the section of the inner tube extending from the outer tube. The first balloon covers the outer side of the forward electrode pair, and the second balloon covers the outer side of the radial electrode pair. This disclosure utilizes balloons to act as a support arm for the blood vessel wall, while simultaneously using the forward and radial electrode pairs within the balloons to emit shock waves that break down and lyse calcified tissue at the site of vascular occlusion, thereby achieving a good effect in opening the blood vessel.

Description

Technical Field

[0001] This disclosure relates to the field of medical devices, and in particular to a shockwave dual-balloon electrode catheter. Background Technology

[0002] Chronic total occlusion (CTO) is a term used to describe highly calcified atherosclerotic vessels, to the point that the vessel lumen is completely blocked. CTO can occur in the heart or peripheral arteries, significantly increasing the risk of heart failure and lower limb amputation. Operating room CTO cases are particularly challenging because it is difficult to pass the lesion with a conventional guidewire, resulting in nearly double the operation time and fluoroscopic exposure.

[0003] The emergence of new technologies and devices has helped cardiac teams increase the chances of successful revascularization in patients with CTO. Most importantly, a set of guidewire-passing techniques following a standardized algorithm has been developed to accommodate different lesion morphologies. Using a specially designed guidewire, skilled operators can pass through the CTO in significantly less time. Once passed, standard angioplasty balloon dilation and stent placement can be performed.

[0004] However, a significant problem remains: while the guidewire can pass through the lesion, the balloon angioplasty catheter cannot due to its larger profile. These lesions, known as balloon-passable lesions, require the use of further specialized devices called passing devices or penetrating catheters. These devices are tracked along the guidewire, and when a balloon-passable lesion is reached, various techniques are used to create a larger channel through which the balloon angioplasty catheter can pass.

[0005] Since the advent of the technique for chronic total occlusion lesions in percutaneous coronary intervention (PCI), many devices and techniques have been described over time.

[0006] From simple mechanical methods of drilling through lesions using high-revolution-per-minute (RPM) catheters, to the ablation and removal of calcified material using laser and radiofrequency energy, this invention proposes a penetrating system that uses forward shock wave energy to break up and fragment calcified plaques, allowing the lesion balloon to pass through, while radial shock wave energy can further break up calcified plaques within the vessel wall, achieving balloon angioplasty.

[0007] Current angioplasty involves inserting an expandable balloon into the blood vessel. The rapid expansion of the balloon exerts mechanical stress on the calcified lesions, causing them to break up. However, balloon angioplasty is only suitable for large, concentrated calcified deposits and cannot address scattered or deep-seated calcifications in the ventricles, resulting in low and incomplete calcium removal efficiency. If the patient has severe arterial calcification or a long, narrowed segment, balloon angioplasty is less effective. Rapid balloon expansion can cause sudden pressure changes in the vessel wall, easily damaging the vessel and even causing thrombosis. Furthermore, balloon angioplasty requires very high pressure (sometimes reaching 20 to 30 atmospheres, or even 40 atmospheres). Such pressure significantly increases the probability of rebound stenosis, dissection, perforation, and rupture. These surgical events are particularly severe in cases of eccentric calcified lesions because the balloon pressure acts on uncalcified soft tissue.

[0008] When the plaque in a patient's blood vessels is hard and the stenosis is severe, the balloon may not be able to pass through the calcified area at all, and thus cannot achieve any therapeutic effect. Summary of the Invention

[0009] The purpose of this disclosure is to provide a shockwave dual-balloon electrode catheter to solve the problems existing in the prior art. To solve these technical problems, the embodiments of this disclosure adopt the following technical solutions:

[0010] This disclosure provides a shockwave dual-balloon electrode catheter, including an inner tube and an outer tube. The inner tube is disposed inside the outer tube and extends from the distal end of the outer tube. The proximal end of the outer tube is connected to a tailstock, which is connected to an adapter via a cable. A first balloon and a second balloon are disposed on the inner tube. The first balloon is disposed at the distal end of the inner tube, and the second balloon is disposed on the tube body of the inner tube extending from the outer tube. At least one forward electrode pair for forward emission of shock waves is disposed at the distal end of the inner tube, and at least one radial electrode pair for radial emission of shock waves is disposed on the tube body of the inner tube extending from the outer tube. The first balloon covers the outside of the forward electrode pair, and the second balloon covers the outside of the radial electrode pair.

[0011] In some embodiments, the forward electrode pair includes a forward negative electrode and at least one forward positive electrode, wherein the forward negative electrode and each of the forward positive electrodes form a forward electrode pair.

[0012] In some embodiments, the forward negative electrode is cylindrical, the forward positive electrode is hollow cylindrical, and the bottom surface of the forward negative electrode is provided with an inner tube through hole for the inner tube to pass through and an electrode through hole for fixing the forward positive electrode.

[0013] In some embodiments, an insulating post is provided on the inner side of the forward negative electrode, and a conduit channel and an insulating channel are provided on the bottom surface of the insulating post. The through hole on the bottom surface of the forward negative electrode and the channel on the bottom surface of the insulating post are coaxially arranged.

[0014] In some embodiments, when there are multiple radial electrode pairs, the multiple radial electrode pairs are arranged sequentially along the extension direction of the inner tube.

[0015] In some embodiments, each radial electrode pair includes two radial electrodes spaced at a predetermined interval, and the two radial electrodes may be positive and negative electrodes to each other.

[0016] In some embodiments, the radial electrode has a hollow cylindrical segment, and two protrusions are disposed opposite each other on the end face of the cylindrical segment, wherein the protrusions of the two radial electrodes in each radial electrode pair are disposed opposite each other.

[0017] In some embodiments, two adjacent radial electrode pairs are arranged at a radial angle of 90°.

[0018] In some embodiments, a tubular insulating ring is provided on the outer side of each radial electrode pair for encapsulating the two radial electrodes in the radial electrode pair, and a discharge groove is provided in the middle of the wall of the insulating ring.

[0019] In some embodiments, two of the protrusions in the radial electrode pair are located at the position of the discharge groove of the insulating ring.

[0020] This embodiment addresses situations where patients have hard plaques and severe stenosis in their blood vessels. By using a balloon to support the blood vessel wall, and simultaneously emitting shock waves through the forward and radial electrode pairs within the balloon, the calcified tissue at the site of vascular occlusion is broken and lysed. This allows for smooth passage through lesions with high stenosis, thereby achieving a good effect in opening the blood vessel. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the shockwave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0023] Figure 2This is a schematic diagram of the arrangement of the balloon and electrode pair in the shock wave dual balloon electrode catheter according to an embodiment of the present disclosure;

[0024] Figure 3 This is a schematic diagram of the structure of the first balloon in the shockwave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0025] Figure 4 This is a schematic diagram of the forward electrode pair in the shockwave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0026] Figure 5 This is a schematic diagram of the forward negative electrode of the forward electrode pair in the shock wave dual balloon electrode catheter according to an embodiment of the present disclosure;

[0027] Figure 6 This is a schematic diagram of the insulating column in the shock wave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0028] Figure 7 This is a schematic diagram of the radial electrode structure in the shockwave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0029] Figure 8 This is a schematic diagram of the arrangement of radial electrode pairs in the shock wave dual balloon electrode catheter according to an embodiment of this disclosure;

[0030] Figure 9 This is a schematic diagram of the arrangement of radial electrodes in the shockwave dual-balloon electrode catheter according to an embodiment of this disclosure;

[0031] Figure 10 This is a schematic diagram of the insulating ring in the shock wave dual-balloon electrode catheter according to an embodiment of the present disclosure;

[0032] Figure 11 This is a schematic diagram of the arrangement of the insulating ring in the shock wave dual-balloon electrode catheter according to an embodiment of this disclosure.

[0033] Figure label:

[0034] 100-Shockwave dual-balloon electrode conduit; 101-First balloon; 102-Second balloon; 103-Outer tube; 104-Tailstock; 105-Cable; 106-Adapter; 107-First electrode pair; 108-Inner tube; 109-Second electrode pair; 110-Third electrode pair; 110a-First forward positive electrode; 110b-Second forward positive electrode; 111-Insulating ring; 112-Discharge tank; 113-Cylindrical section; 113a-Protrusion ; 114a First radial electrode; 114b Second radial electrode; 114c Third radial electrode; 114d Fourth radial electrode; 115 First fixing point; 116 Second fixing point; 117 Third fixing point; 118 Insulating post; 118a First insulating channel; 118b Second insulating channel; 119 Positive electrode wire; 120 Forward negative electrode; 120a First through hole; 120b Second through hole; 120c Third through hole. Detailed Implementation

[0035] Various embodiments and features of this disclosure are described herein with reference to the accompanying drawings.

[0036] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0037] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0038] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0039] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0040] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0041] Specific embodiments of this disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this disclosure, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure this disclosure. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use this disclosure in a variety of substantially any suitable detailed structures.

[0042] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0043] This disclosure provides a shockwave dual-balloon electrode catheter 100, which is used to achieve vascular perforation and angioplasty by emitting directional shock waves within a blood vessel. Figures 1-11 As shown, the shockwave dual-balloon electrode catheter 100 includes an inner tube 108 and an outer tube 103. The inner tube 108 is disposed within the outer tube 103 and extends from the distal end of the outer tube 103. The inner tube 108 is a hollow tube, forming a guidewire cavity to accommodate a guidewire with a diameter of 0.010-0.035 inches. Furthermore, the proximal end of the outer tube 103 is connected to a tailstock 104. Preferably, the tailstock 104 is connected to the proximal end of the outer tube 103 via a stress-relieving tube 103. Additionally, the tailstock 104 is connected to an adapter 106 via a cable 105.

[0044] To support blood vessels when the shockwave dual-balloon electrode catheter 100 is inserted into the human body, multiple balloons are provided on the inner tube 108. These balloons inflate to contact the vessel wall and provide support. In this embodiment, the inner tube 108 is specifically equipped with a dual-balloon structure, for example, a first balloon 101 and a second balloon 102 are provided on the inner tube 108. The first balloon 101 is located at the distal end of the inner tube 108, and the second balloon is located on the section of the inner tube 108 extending from the outer tube 103. Here, a cavity for liquid inflow exists between the outer tube 103 and the inner tube 108, allowing the first balloon 101 and the second balloon 102 to be filled with liquid and inflated by applying pressure.

[0045] Furthermore, at least one forward electrode pair for emitting shock waves is disposed at the distal end of the inner tube 108, and at least one radial electrode pair for emitting shock waves is disposed on the tube body of the inner tube 108 extending from the outer tube 103. When there are multiple radial electrode pairs, they are arranged sequentially along the extension direction of the inner tube 108. The first balloon 101 covers the outer side of the forward electrode pair, and the second balloon 102 covers the outer side of the radial electrode pair. The shock waves emitted by the forward electrode pair pass through the first balloon 101 and contact the blood vessel wall, while the shock waves emitted by the radial electrode pair pass through the second balloon 102 and contact the blood vessel wall. The forward electrode pair serves as a plaque-opening electrode pair capable of forward-emitting shock waves, and the radial electrode pair serves as a plaque-breaking electrode pair capable of radially emitting shock waves.

[0046] The first balloon 101 is fixed to the distal end of the inner tube 108 to form a first fixing point 115. The fixing method can be adhesive, welding, binding, etc. The second balloon 102 has one end fixed to the inner tube 108 to form a second fixing point 116, and the other end fixed to the distal end of the outer tube 103 to form a third fixing point 117. The fixing method can be adhesive, welding, binding, etc.

[0047] The first balloon 101 here can be a compliant balloon, made of soft materials such as natural latex, silicone, and TPU; the second balloon 102 can be a semi-compliant or non-compliant balloon, made of polymer materials such as PET, PP, polyethylene, and polyamide.

[0048] In this embodiment, the first electrode pair 107 disposed at the distal end of the inner tube 108 is a forward electrode pair, and two radial electrode pairs are disposed on the inner tube 108, namely the second electrode pair 109 and the third electrode pair 110.

[0049] Specifically, the forward electrode pair, also known as the first electrode pair, includes a forward negative electrode 120 and at least one forward positive electrode. The forward negative electrode 120 and each forward positive electrode form one forward electrode pair. When there are multiple forward positive electrodes, the forward negative electrode 120 and the multiple forward positive electrodes form multiple forward electrode pairs. The forward negative electrode 120 is cylindrical with a diameter of 0.1-1.0 mm and a wall thickness of 0.03-0.3 mm. In this embodiment, the forward negative electrode 120 can be made of stainless steel, tungsten, platinum-iridium, nickel, iron, steel, and / or other conductive materials.

[0050] Furthermore, the bottom surface of the forward negative electrode 120 is provided with an inner tube through hole for the inner tube 108 to pass through and an electrode through hole for fixing the forward positive electrode. Here, each forward positive electrode fixed through the electrode through hole forms a forward electrode pair with the forward negative electrode 120. The number of electrode through holes matches the number of forward positive electrodes, and the number of electrode through holes determines the number of forward positive electrodes.

[0051] The forward positive electrode is cylindrical with a diameter of 0.1-0.8 mm and a length of 0.2-2.0 mm. The electrode material of the forward positive electrode can be stainless steel, tungsten, platinum-iridium, nickel, iron, steel and / or other conductive materials.

[0052] In this embodiment, the forward negative electrode 120 and the forward positive electrode are connected to the negative electrode wire and the positive electrode wire 119 respectively by welding. In this embodiment, the negative electrode wire and the positive electrode wire 119 extend to the proximal end of the outer tube 103 to connect with the cable 105.

[0053] In one specific embodiment, a first through hole 120a, a second through hole 120b, and a third through hole 120c are provided on the bottom surface of the forward negative electrode 120. Here, the first through hole 120a serves as the through hole of the inner tube and is located at the center of the bottom surface, allowing the inner tube 108 to pass through. The diameter of the first through hole 120a can be 0.2mm-2.0mm. The second through hole 120b and the third through hole 120c are respectively provided on the bottom surface of the forward negative electrode 120 and are located on both sides of the first through hole 120a for coaxially fixing the forward positive electrode. Here, the diameter of the electrode through hole can be 0.2mm-1.0mm.

[0054] Specifically, a first forward positive electrode 110a and a second forward positive electrode 110b are respectively inserted into the second through hole 120b and the third through hole 120c, and the first forward positive electrode 110a and the second forward positive electrode 110b are respectively connected to corresponding positive electrode wires. In this embodiment, the forward negative electrode 120, together with the first forward positive electrode 110a and the second forward positive electrode 110b, forms two forward electrode pairs that generate and emit forward shock waves. Here, the end faces of the first forward positive electrode 110a and the second forward positive electrode 110b are flush with or slightly concave to the second through hole 120b and the third through hole 120c.

[0055] Furthermore, since the forward negative electrode 120 is cylindrical, an insulating post 118 is provided on the inner side of the forward negative electrode 120. A conduit channel and an insulating channel are provided on the bottom surface of the insulating post 118. The through-hole on the bottom surface of the forward negative electrode and the channel on the bottom surface of the insulating post 118 are coaxially aligned. For example, the bottom surface of the insulating post 118 is provided with a conduit channel, a first insulating channel 118a, and a second insulating channel 118b, through which the first forward positive electrode 110a and the second forward positive electrode 110b respectively pass. The insulating post 11 can be made of HDPE, LDPE, PET, PP, polyamide, PTFE, PI, and / or other materials.

[0056] The insulating post 118 here encapsulates the cylindrical sections of the forward positive electrode and the forward negative electrode, with only the protrusions of the electrodes exposed. This essentially ensures that tip discharge only occurs at the protrusions of the positive and negative electrode pairs, generating shock waves and releasing them in a directional manner, thereby confining and focusing energy.

[0057] Further, each radial electrode pair includes two radial electrodes spaced at a predetermined interval, and the two radial electrodes can be positive and negative electrodes to each other, with a gap of 0.1-2.0 mm between them. The electrode material of the radial electrodes can be stainless steel, tungsten, platinum-iridium, nickel, iron, steel, and / or other conductive materials. In this embodiment, the second electrode pair 109 includes a first radial electrode 114a and a second radial electrode 114b, and the third electrode pair 110 includes a third radial electrode 114d and a fourth radial electrode 114d. The positive and negative attributes of the two radial electrodes in each radial electrode pair can be reversed.

[0058] In this embodiment, the radial electrode has a hollow cylindrical segment 113. Two protrusions 113a are disposed opposite each other on the end face of the cylindrical segment 113. The diameter of the cylindrical segment 113 is 0.1-0.8 mm and the length is 0.2-2.0 mm. The width of each protrusion 113a is 0.1-0.5 mm and the length is 0.1-0.8 mm. Preferably, the protrusions 122 of the two radial electrodes in each radial electrode pair are disposed opposite each other. The distance between the protrusions 113a of the two radial electrodes is 0.05-2.0 mm.

[0059] Furthermore, adjacent radial electrode pairs can be positioned at a certain angle to facilitate the breaking up of patches at different locations, such as... Figure 9As shown, two adjacent radial electrode pairs can be set 90° apart, that is, the line connecting the protrusions 122 of the two radial electrodes in the second electrode pair 109 and the line connecting the protrusions 122 of the two radial electrodes in the third electrode pair 110 are 90° apart in the radial direction.

[0060] In a preferred embodiment, the shockwave dual-balloon electrode catheter may have 1-8 forward electrode pairs and may have more radial electrode pairs, such as 3-6 pairs, along the length of its inner tube 108, to facilitate the rupture of calcified plaques along the length of the blood vessel.

[0061] In one embodiment, both radial electrodes in the radial electrode pair are exposed. This type of electrode pair has a simple arrangement process. At the same time, the protrusions of the radial electrodes can greatly increase the generation of shock waves by tip discharge and ensure the directional release of shock waves, thereby creating a confinement and energy-focusing effect.

[0062] This embodiment of the invention utilizes the forward and radial electrode pairs to directionally transmit shock waves, ensuring the effective location of the shock waves and reducing energy damage. Furthermore, this embodiment allows for the selective activation of different electrode pairs to transmit shock waves; for example, a specific electrode pair can be selected, electrode pairs can be activated sequentially, or all electrode pairs can be activated simultaneously, greatly facilitating the operator's intraoperative procedures.

[0063] Furthermore, an insulating ring 111 is provided on the outer side of each radial electrode pair to encapsulate the two radial electrodes in the radial electrode pair. The insulating ring 111 is tubular, and a discharge groove 112 is provided in the middle of the wall of the insulating ring 111. The insulating ring 11 here has relatively high insulation strength, and the material of the insulating ring is polyimide, PTFE, nylon, PET, or other non-conductive materials. The discharge groove 112 here has a width of 0.3-1.0 mm and a length of 0.3-2.5 mm.

[0064] Specifically, in one embodiment, the two protrusions 122 in the radial electrode pair can be located at the position of the discharge groove 112 of the insulating ring 111, so that the shock wave energy generated by the positive and negative electrodes can only be released in a directional manner through the discharge groove 112, thereby producing a complete constraint and energy concentration effect on the energy.

[0065] When this embodiment is applied within a blood vessel 123, the vessel wall 123 has occluded plaques 125. The external electrode 109 and the internal electrode work together to form an opening forward electrode pair, which can combine the advantages of plaque opening electrode pairs and plaque breaking electrode pairs. The forward electrode pair emits a forward shock wave 126 to break up the occluded plaques 125 and form broken plaques 127, thereby allowing the catheter to pass smoothly through lesion sites with high stenosis.

[0066] Specifically, the distal angle of the first balloon 101 is relatively large, allowing it to achieve a close forward fit with the occlusive plaque within the blood vessel. The outer surface of the second balloon 102 can radially contact the vessel wall and the calcified lesion area. By applying a momentary high voltage to the forward electrode pair inside the first balloon 101 and the radial electrode pair inside the second balloon 102, an electric arc is generated. The expansion and collapse of the air bubble produced by the arc generates a shock wave. This shock wave is radially conducted through the fluid inside the balloon to the surface of the balloon, and then further conducted to the calcified lesion. When the shock wave is forward-conducted to the calcified lesion, the compressive stress causes the calcified tissue at the vascular occlusion site to soften and rupture, allowing the shock wave dual-balloon electrode catheter to pass through the vascular occlusion site. Subsequently, the radial shock wave generated by the radial electrode pair further breaks down and ruptures the calcified tissue, achieving a good effect of opening the blood vessel. Furthermore, the appropriate intensity of the shock wave is sufficient to destroy the calcified tissue without placing additional burden on the surrounding soft tissue.

[0067] This embodiment addresses situations where patients have hard plaques and severe stenosis in their blood vessels. By using a balloon to support the blood vessel wall, and simultaneously emitting shock waves through the forward and radial electrode pairs within the balloon, the calcified tissue at the site of vascular occlusion is broken and lysed. This allows for smooth passage through lesions with high stenosis, thereby achieving a good effect in opening the blood vessel.

[0068] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0069] Although the subject matter has been described using language specific to structural features and / or methodological logic, 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. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0070] The foregoing has provided a detailed description of several embodiments of this disclosure. However, this disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this disclosure, and all such variations and modifications should fall within the scope of protection claimed by this disclosure.

Claims

1. A shockwave dual-balloon electrode catheter, characterized in that, The device includes an inner tube and an outer tube. The inner tube is disposed inside the outer tube and extends from the distal end of the outer tube. The proximal end of the outer tube is connected to a tailstock. The tailstock is connected to an adapter via a cable. A first balloon and a second balloon are disposed on the inner tube. The first balloon is disposed at the distal end of the inner tube, and the second balloon is disposed on the tube body of the inner tube extending from the outer tube. At least one forward electrode pair for emitting shock waves is disposed at the distal end of the inner tube, and at least one radial electrode pair for emitting shock waves is disposed on the tube body of the inner tube extending from the outer tube. The first balloon covers the forward electrode pair. Outside the radial electrode pair, the second balloon covers and is disposed outside the radial electrode pair; the forward electrode pair includes a forward negative electrode and at least one forward positive electrode, the forward negative electrode and each of the forward positive electrodes forming a forward electrode pair; the bottom surface of the forward negative electrode is provided with an inner tube through hole for the inner tube to pass through and an electrode through hole for fixing the forward positive electrode; an insulating pillar is disposed inside the forward negative electrode, the bottom surface of the insulating pillar is provided with a conduit channel and an insulating channel, and the through hole on the bottom surface of the forward negative electrode and the channel on the bottom surface of the insulating pillar are coaxially disposed corresponding to each other.

2. The shockwave dual-balloon electrode catheter according to claim 1, characterized in that, The forward negative electrode is cylindrical, and the forward positive electrode is cylindrical.

3. The shockwave dual-balloon electrode catheter according to claim 1, characterized in that, When there are multiple radial electrode pairs, the multiple radial electrode pairs are arranged sequentially along the extension direction of the inner tube.

4. The shockwave dual-balloon electrode catheter according to claim 1, characterized in that, Each of the radial electrode pairs includes two radial electrodes spaced at a predetermined interval, the two radial electrodes being positive and negative electrodes to each other.

5. The shockwave dual-balloon electrode catheter according to claim 4, characterized in that, The radial electrode has a hollow cylindrical segment, and two protrusions are arranged opposite each other on the end face of the cylindrical segment. The protrusions of the two radial electrodes in each radial electrode pair are arranged opposite each other.

6. The shockwave dual-balloon electrode catheter according to claim 5, characterized in that, A tubular insulating ring is provided on the outer side of each radial electrode pair to encapsulate the two radial electrodes in the radial electrode pair, and a discharge groove is provided in the middle of the wall of the insulating ring.

7. The shockwave dual-balloon electrode catheter according to claim 6, characterized in that, The two protrusions in the radial electrode pair are located at the position of the discharge groove in the insulating ring.

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