Shock wave double-balloon electrode catheter

Abstract

The shock wave double-balloon electrode 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 near end of the outer tube is connected with a tailstock, the tailstock is connected with an adapter through a cable, the inner tube is provided with a first balloon and a second balloon, the first balloon is arranged at the far end of the inner tube, and the second balloon is arranged at the far end of the outer tube. The second balloon is arranged on the tube body, extending out of the outer tube, of the inner tube, at least one forward electrode pair used for emitting shock waves forwards is arranged at the far end of the inner tube, at least one radial electrode pair used for emitting shock waves in the radial direction is arranged on the tube body, extending out of the outer tube, of the inner tube, and the first balloon wraps the outer sides of the forward electrode pairs. The second balloon is arranged on the outer side of the radial electrode pair in a wrapping mode. According to the embodiment of the invention, the supporting arm of the blood vessel wall is realized through the balloon, and meanwhile, the shock waves are emitted through the forward electrode pair and the radial electrode pair in the balloon to crush and split calcified tissues at a blood vessel occlusion part, so that a good blood vessel opening effect is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of medical devices, and in particular to a shock wave double-balloon electrode catheter. 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 different lesion morphologies. Using specially designed crossing guidewires, skilled operators can cross CTOs in a greatly reduced time. Once crossed, standard angioplasty balloon dilatation and stent placement can be performed.

[0004] However, there remains a significant problem where the guidewire is able to pass through a lesion but the balloon angioplasty catheter cannot due to its larger profile. These lesions, known as balloon-traversable lesions, require the use of further specialized devices, known as traversing devices or penetrating catheters. These devices are tracked over the guidewire and, when reaching the balloon-impenetrable lesion, utilize various techniques to create a larger channel through which the balloon angioplasty catheter can pass.

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

[0006] From the simple mechanical method of drilling through the lesion with a high RPM catheter, there are also 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 split the calcified plaque so that the lesion balloon can pass through, while the radial shock wave energy can break up the calcified plaque in the vessel wall again to achieve balloon angioplasty.

[0007] 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. However, balloon dilatation surgery is only suitable for large centralized calcified 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. 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 dilatation 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 significant increase in the probability of rebound stenosis, dissection, perforation, and rupture of the blood vessel. Such surgical events are particularly serious in cases of eccentric calcified lesions because the pressure of the balloon acts on soft tissue without calcification.

[0008] When the patient's intravascular plaque is hard and the degree of stenosis is severe, it is possible that the balloon cannot pass through the calcified area at all, let alone have any therapeutic effect. Summary of the invention

[0009] The purpose of the embodiments of the present disclosure is to provide a shock wave double balloon electrode 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:

[0010] The disclosed embodiment provides a shock wave double-balloon electrode 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, the proximal end of the outer tube is connected to a tail seat, and the tail seat is connected to an adapter via a cable, a first balloon and a second balloon are arranged on the inner tube, the first balloon is arranged at the distal end of the inner tube, the second balloon is arranged on the tube body of the inner tube extending from the outer tube, at least one forward electrode pair for emitting shock waves forward is arranged at the distal end of the inner tube, at least one radial electrode pair for emitting shock waves radially is arranged on the tube body of the inner tube extending from the outer tube, the first balloon is coated on the outer side of the forward electrode pair, and the second balloon is coated on the outer side 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, and the forward negative electrode and each forward positive electrode form one forward electrode pair.

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

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

[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 of the radial electrode pairs includes two radial electrodes spaced a predetermined distance apart, 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 section, and two protrusions are arranged opposite to each other on the end surface of the cylindrical section, and the protrusions of the two radial electrodes in each radial electrode pair are arranged opposite to each other.

[0017] In some embodiments, two adjacent radial electrode pairs are arranged 90° apart in the radial direction.

[0018] In some embodiments, a tubular insulating ring is disposed outside each radial electrode pair, which is used to encapsulate the two radial electrodes in the radial electrode pair, and a discharge groove is disposed 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 positions of the discharge slots of the insulating ring.

[0020] The disclosed embodiment aims at the case where the intravascular plaque of the patient is hard and the stenosis is severe. The support arm of the blood vessel wall is realized by the balloon. At the same time, the forward electrode pair and radial electrode pair in the balloon emit shock waves to break up and lyse the calcified tissue at the occluded blood vessel, so that the balloon can smoothly pass through the lesion site with higher stenosis, thereby achieving a good effect of opening the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic structural diagram of a shock wave double-balloon electrode catheter according to an embodiment of the present disclosure;

[0023] Figure 2It is a schematic diagram of the arrangement of balloons and electrode pairs in a shock wave double-balloon electrode catheter according to an embodiment of the present disclosure;

[0024] Figure 3 It is a schematic structural diagram of the first balloon in the shock wave double-balloon electrode catheter of the embodiment of the present disclosure;

[0025] Figure 4 It is a schematic structural diagram of a forward electrode pair in a shock wave double-balloon electrode catheter according to an embodiment of the present disclosure;

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

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

[0028] Figure 7 It is a schematic diagram of the structure of the radial electrode in the shock wave double balloon electrode catheter according to an embodiment of the present disclosure;

[0029] Figure 8 It is a schematic diagram of the arrangement of radial electrode pairs in the shock wave double-balloon electrode catheter according to an embodiment of the present disclosure;

[0030] Fig. 9 It is a schematic diagram of the arrangement of radial electrodes in the shock wave double balloon electrode catheter according to an embodiment of the present disclosure;

[0031] Fig.10 It is a schematic diagram of the structure of the insulating ring in the shock wave double-balloon electrode catheter according to an embodiment of the present disclosure;

[0032] Fig.11 The diagram is a schematic diagram of the arrangement of the insulating rings in the shock wave double-balloon electrode catheter according to an embodiment of the present disclosure.

[0033] Reference numerals:

[0034] 100-shock wave double balloon electrode catheter; 101-first balloon; 102-second balloon; 103-outer tube; 104-tail seat; 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 groove; 113-cylindrical segment; 113a-protrusion ; 114a first radial electrode; 114b second radial electrode; 114c third radial electrode; 114d fourth radial electrode; 115-first fixed point; 116-second fixed point; 117-third fixed point; 118-insulating column; 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 DESCRIPTION

[0035] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] The present disclosure provides a shock wave double-balloon electrode catheter 100, which is used to transmit directional shock waves in a blood vessel to achieve blood vessel perforation and angioplasty. Figure 1-Figure 11 As shown, the shock wave double balloon electrode catheter 100 includes an inner tube 108 and an outer tube 103, wherein the inner tube 108 is disposed inside the outer tube 103 and extends from the distal end of the outer tube 103, wherein the inner tube 108 is a hollow tube, and the hollow tube forms a guidewire cavity to accommodate a guidewire with a diameter of 0.010-0.035 inches. In addition, the proximal end of the outer tube 103 is connected to the tailstock 104, and preferably, the tailstock 104 is connected to the proximal end of the outer tube 103 through the stress relief tube 103. In addition, the tailstock 104 is connected to the adapter 106 through the cable 105.

[0044] In order to support the blood vessels when the shock wave double-balloon electrode catheter 100 is inserted into the human body, a plurality of balloons are arranged on the inner tube 108, and the balloons are expanded after being filled to contact the blood vessel wall of the blood vessel to achieve support. In this embodiment, a double-balloon structure is particularly arranged on the inner tube 108, for example, a first balloon 101 and a second balloon 102 are arranged on the inner tube 108, wherein the first balloon 101 is arranged at the distal end of the inner tube 108, and the second balloon is arranged on the tube body of the inner tube 108 extending out of the outer tube 103. Here, there is a cavity for liquid to flow in between the outer tube 103 and the inner tube 108, which is used to fill the first balloon 101 and the second balloon 102 with liquid, and apply a certain pressure to fill the balloons.

[0045] Furthermore, at least one forward electrode pair for emitting shock waves forward is provided at the distal end of the inner tube 108, and at least one radial electrode pair for emitting shock waves radially is provided on the tube body of the inner tube 108 extending out of the outer tube 103. Wherein, when there are multiple radial electrode pairs, the multiple radial electrode pairs are arranged in sequence along the extension direction of the inner tube 108. Wherein, the first balloon 101 is coated on the outside of the forward electrode pair, and the second balloon 102 is coated on the outside of the radial electrode pair. Here, the shock waves emitted by the forward electrode pair pass through the first balloon 101 to contact the blood vessel wall, and the shock waves emitted by the radial electrode pair pass through the second balloon 102 to contact the blood vessel wall. Here, the forward electrode pair acts as a plaque opening electrode pair to send shock waves forward, and the radial electrode pair acts as a plaque crushing electrode pair to send shock waves radially.

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

[0047] Here, the first balloon 101 may be a compliant balloon, and its material may be a soft material such as natural latex, silicone, TPU, etc.; the second balloon 102 may be a semi-compliant or non-compliant balloon, and its material may be a polymer material such as PET, PP, polyethylene, polyamide, etc.

[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 a second electrode pair 109 and a third electrode pair 110.

[0049] Specifically, the forward electrode pair, that is, the first electrode pair, includes a forward negative electrode 120 and at least one forward positive electrode, wherein the forward negative electrode 120 forms one forward electrode pair with each forward positive electrode. When there are multiple forward positive electrodes, the forward negative electrode 120 forms multiple forward electrode pairs with multiple forward positive electrodes. 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. The forward negative electrode 120 of this embodiment can be made of stainless steel, tungsten, platinum-iridium, nickel, iron, steel and / or other conductive materials.

[0050] Furthermore, an inner tube through hole for the inner tube 108 to pass through and an electrode through hole for fixing the forward positive electrode are provided on the bottom surface of the forward negative electrode 120, and each forward positive electrode fixed through the electrode through hole forms a forward electrode pair with the forward negative electrode 120. The number of the electrode through holes here matches the number of the forward positive electrodes, and the number of the electrode through holes determines the number of the 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 respectively connected to the negative electrode wire and the positive electrode wire 119 by welding. The negative electrode wire and the positive electrode wire 119 in this embodiment extend to the proximal end of the outer tube 103 to be connected to the cable 105.

[0053] In a specific embodiment, a first through hole 120a, a second through hole 120b and a third through hole 120c are arranged on the bottom surface of the forward negative electrode 120, wherein the first through hole 120a serves as the inner tube through hole and is located at the center of the bottom surface, and is used to pass the inner tube 108, and the diameter of the first through hole 120a may be 0.2mm-2.0mm; the second through hole 120b and the third through hole 120c are respectively arranged 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, and the diameter of the electrode through hole here may be 0.2mm-1.0mm.

[0054] Specifically, the first forward positive electrode 110a and the 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 and the first forward positive electrode 110a and the second forward positive electrode 110b form two forward electrode pairs that generate and emit forward shock waves. 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 in a cylindrical shape, an insulating column 118 is disposed inside the forward negative electrode 120, a conduit channel and an insulating channel are disposed on the bottom surface of the insulating column 118, and the through hole on the bottom surface of the forward negative electrode is disposed coaxially with the channel on the bottom surface of the insulating column 118. For example, a conduit channel, a first insulating channel 118a and a second insulating channel 118b are disposed on the bottom surface of the insulating column 118, and the first forward positive electrode 110a and the second forward positive electrode 110b pass through the first insulating channel 118a and the second insulating channel 118b respectively. The insulating column 11 may be made of HDPE, LDPE, PET, PP, polyamide, PTFE, PI and / or other materials.

[0056] The insulating column 118 here encapsulates the cylindrical segments of the forward positive electrode and the forward negative electrode, and only the protruding parts of the electrodes are exposed. This basically ensures that the tip discharge only occurs at the protruding parts of the positive and negative electrode pairs, generating shock waves and releasing them in a directional manner, thereby constraining and focusing the energy.

[0057] Further, each of the radial electrode pairs includes two radial electrodes at a predetermined interval, and the two radial electrodes can be positive and negative electrodes to each other, and the gap between the two radial electrodes here is 0.1-2.0 mm. The electrode material of the radial electrode 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. Among them, the positive and negative properties of the two radial electrodes in each radial electrode pair can be reversed.

[0058] The radial electrode in this embodiment has a hollow cylindrical section 113, and two protrusions 113a are arranged opposite to each other on the end surface of the cylindrical section 113. The diameter of the cylindrical section 113 is 0.1-0.8 mm and the length is 0.2-2.0 mm. The width of the protrusion 113a is 0.1-0.5 mm and the length is 0.1-0.8 mm. The protrusions 122 of the two radial electrodes in each radial electrode pair can preferably be arranged opposite to each other. The spacing between the protrusions 113a of the two radial electrodes is 0.05-2.0 mm.

[0059] Furthermore, two adjacent radial electrode pairs may be arranged at a certain angle to facilitate breaking up plaques at different positions, such as Fig. 9As shown, two adjacent radial electrode pairs may be arranged 90° apart, that is, a line connecting the protrusions 122 of the two radial electrodes in the second electrode pair 109 and a line connecting the protrusions 122 of the two radial electrodes in the third electrode pair 110 differ by 90° in radial direction.

[0060] In a preferred embodiment, 1-8 forward electrode pairs may be provided in the shock wave double balloon electrode catheter, and more radial electrode pairs, such as 3-6 pairs, may be provided along the length of the inner tube 108 to facilitate rupture of calcified plaques along the length of the blood vessel.

[0061] In one embodiment, two of the radial electrodes in the radial electrode pair are exposed. The arrangement process of this electrode pair is simple. At the same time, the protrusions of the radial electrodes can greatly increase the shock wave generated by tip discharge and ensure the directional release of the shock wave, thereby constraining and focusing the energy.

[0062] The embodiment of the present disclosure transmits shock waves in a directionable manner through the forward electrode pair and the radial electrode pair, which not only ensures the action position of the shock wave, but also reduces the damage caused by the shock wave energy. In addition, the embodiment of the present disclosure can selectively stimulate different electrode pairs to send shock waves, for example, a certain electrode pair can be selected to send shock waves, or electrode pairs can be stimulated in sequence, or all electrode pairs can be stimulated at the same time, which greatly facilitates the operator's operation during the operation.

[0063] Furthermore, an insulating ring 111 is arranged outside each radial electrode pair, which is used to encapsulate the two radial electrodes in the radial electrode pair, and the insulating ring 111 is tubular, and a discharge groove 112 is arranged in the middle of the wall of the insulating ring 111. The insulation strength of the insulating ring 11 here should be relatively high, and the material of the insulating ring is polyimide, PTFE, nylon, PET or other non-conductive materials, and the width of the discharge groove 112 here is 0.3-1.0 mm, and the length is 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 slot 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 direction through the discharge slot 112, thereby producing a complete constraint and energy focusing effect on the energy.

[0065] When this embodiment is used in a blood vessel 123, there is an occluded plaque 125 on the vascular wall 123 of the blood vessel 123. The cooperation between the outer electrode 109 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 location with a higher degree of stenosis.

[0066] Specifically, the distal end angle of the first balloon 101 is relatively large, and the distal end of the first balloon 101 can produce a relatively close forward fit with the blocked plaque in the blood vessel, and the outer surface of the second balloon 102 can be in radial contact with the blood vessel wall and the vascular calcified lesion area. By applying an instantaneous high voltage to the forward electrode pair in the first balloon 101 and the radial electrode pair inside the second balloon 102 to generate an arc, the bubble expansion and collapse generated by the arc are accompanied by shock waves, and the shock waves generated by the electrode pair are radially transmitted to the surface of the balloon through the liquid inside the balloon, and then transmitted to the calcified lesion through the surface of the balloon. Among them, 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 vascular occlusion to soften and lyse, so that the shock wave double balloon electrode catheter can pass through the vascular occlusion, and then the radial electrode pair generates a radial shock wave to further break and lyse the calcified tissue, so as to achieve a good effect of opening the blood vessel. In addition, 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.

[0067] The disclosed embodiment aims at the case where the intravascular plaque of the patient is hard and the stenosis is severe. The support arm of the blood vessel wall is realized by the balloon. At the same time, the forward electrode pair and radial electrode pair in the balloon emit shock waves to break up and lyse the calcified tissue at the occluded blood vessel, so that the balloon can smoothly pass through the lesion site with higher stenosis, thereby achieving a good effect of opening the blood vessel.

[0068] 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.

[0069] 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.

[0070] 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 double balloon electrode catheter, 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 from the distal end of the outer tube, the proximal end of the outer tube is connected to a tail seat, and the tail seat is connected to an adapter through a cable, a first balloon and a second balloon are arranged on the inner tube, the first balloon is arranged at the distal end of the inner tube, the second balloon is arranged on the tube body of the inner tube extending from the outer tube, at least one forward electrode pair for emitting shock waves forward is arranged at the distal end of the inner tube, at least one radial electrode pair for emitting shock waves radially is arranged on the tube body of the inner tube extending from the outer tube, the first balloon is coated on the outer side of the forward electrode pair, and the second balloon is coated on the outer side of the radial electrode pair.

2. The shock wave double balloon electrode catheter according to claim 1, characterized in that: The forward electrode pair includes a forward negative electrode and at least one forward positive electrode, and the forward negative electrode and each forward positive electrode form one forward electrode pair.

3. The shock wave double balloon electrode catheter according to claim 2, characterized in that: The forward negative electrode is cylindrical, the forward positive electrode is hollow cylindrical, and an inner tube through hole for the inner tube to pass through and an electrode through hole for fixing the forward positive electrode are arranged on the bottom surface of the forward negative electrode.

4. The shock wave double balloon electrode catheter according to claim 3, characterized in that: An insulating column is arranged inside the forward negative electrode, a conduit channel and an insulating channel are arranged on the bottom surface of the insulating column, and a through hole on the bottom surface of the forward negative electrode is coaxially arranged corresponding to the channel on the bottom surface of the insulating column.

5. The shock wave double balloon electrode catheter according to claim 1, characterized in that: When there are a plurality of radial electrode pairs, the plurality of radial electrode pairs are arranged in sequence along the extending direction of the inner tube.

6. The shock wave double balloon electrode catheter according to claim 1, characterized in that: Each radial electrode pair includes two radial electrodes spaced a predetermined distance apart, and the two radial electrodes can be positive and negative electrodes to each other.

7. The shock wave double balloon electrode catheter according to claim 6, characterized in that: The radial electrode has a hollow cylindrical section, and two protrusions are arranged opposite to each other on the end surface of the cylindrical section. The protrusions of the two radial electrodes in each radial electrode pair are arranged opposite to each other.

8. The shock wave double balloon electrode catheter according to claim 7, characterized in that: Two adjacent radial electrode pairs are arranged at a 90° difference in the radial direction.

9. The shock wave double balloon electrode catheter according to claim 7, characterized in that: A tubular insulating ring is arranged outside each radial electrode pair, which is used to encapsulate the two radial electrodes in the radial electrode pair, and a discharge groove is arranged in the middle of the wall of the insulating ring.

10. The shock wave double balloon electrode catheter according to claim 9, characterized in that: The two protrusions in the radial electrode pair are located at the positions of the discharge grooves of the insulating ring.

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