Ring-shaped discharge electrode array and shock wave balloon catheter

Abstract

The present application provides an annular discharge electrode array and a shock wave balloon catheter. The annular discharge electrode array includes: an inner tube, a plurality of inner electrodes, and a first outer electrode; the first outer electrode is in an annular structure; the first outer electrode is sleeved on the outer wall of the inner tube; the inner part of the inner tube contains a multi-chamber structure or a multi-groove structure evenly distributed; one inner electrode is installed in each chamber or each groove; each inner electrode and the first outer electrode form an electrode pair; when the plurality of electrode pairs are energized, they are used to generate an omnidirectional acoustic pressure wave. The annular discharge electrode array provided by the present application can form a plurality of electrode pairs through the plurality of inner electrodes arranged in the inner tube and the outer electrode sleeved on the outer wall of the inner tube, and generate an omnidirectional acoustic pressure wave in the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can simultaneously cover three valve leaflets around the shock wave balloon, thereby improving the stability of the clinical effect.

Description

Technical Field

[0001] This application relates to the field of medical technologies, and particularly to an annular discharge electrode array and a shock wave balloon catheter. Background Art

[0002] Cardiac valve disease is a common type of heart disease. With the continuous improvement of the economic level and medical level, the proportion of degenerative valve disease in cardiac valve disease is increasing continuously, and it is the most important type of valve disease. Calcific aortic valve disease is the main type in degenerative valve disease. Approximately 25% of people over 65 years old are affected by this disease, and the prevalence rate in people over 75 years old even reaches 40%. Aortic valve calcification is the main cause of aortic valve diseases such as aortic stenosis and aortic valve insufficiency. Once a patient has aortic valve calcification, especially when it causes severe aortic stenosis or aortic valve insufficiency, there are very few treatment technology options currently. Transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) are the most commonly used and effective methods, and especially TAVR has gradually gained popularity and recognition among clinicians and patients. However, the TAVR surgery is not the ultimate solution for aortic valve calcification, but just a helpless move due to the lack of a better solution in clinical practice. No one hopes to replace their natural valve with an artificial valve, and there will be endless troubles and pains after implanting an artificial valve, such as the need to implant a pacemaker, the need to take anticoagulants for life, and constantly worrying about neurological diseases caused by thrombosis. Therefore, clinically, an implant-free innovative technology has been continuously sought, which can not only treat aortic valve calcification diseases but also achieve clinical effects similar to or even better than those of TAVR and SAVR.

[0003] Among related clinical innovative technologies, shock wave lithotripsy angioplasty has gradually come into people's view, and it has achieved good clinical effects in the pretreatment of severe calcified lesions in coronary arteries and peripheral arteries. Shock wave lithotripsy angioplasty is an innovative technology for fracturing vascular calcified plaques, which perfectly combines traditional electrohydraulic lithotripsy and balloon angioplasty. A number of miniaturized and parallel-arranged acoustic pressure wave generators are built into the shock wave balloon. The acoustic pressure wave generators are composed of one or more groups of discharge electrodes. Under the action of a high-field-strength electric field generated by high-voltage pulsed discharge, they produce an electrohydraulic effect, generating intermittent acoustic pressure waves, and efficiently and safely destroying superficial and deep calcified plaques in the vascular lumen through non-focused and pulsed mechanical energy, so as to achieve the purpose of significantly improving vascular compliance.

[0004] At present, several device manufacturers in the industry have proposed some design schemes for aortic valve shock wave balloon catheters. These design schemes propose some single independent discharge electrode pairs or arrays of discharge electrode pairs composed of interleaved wires connected in series. These discharge electrode pairs cannot release an omnidirectional acoustic pressure wave inside the balloon. Only when facing and approaching the valve leaflets, the acoustic pressure wave they release can achieve the purpose of fracturing the calcified lesions of the valve leaflets. Therefore, since these discharge electrode pairs cannot well match the valve leaflet structure of the aorta, the energy of the acoustic pressure wave generated by them cannot cover the three valve leaflets around the shock wave balloon at the same time, resulting in unstable clinical effects or limited clinical benefits. Summary of the Invention

[0005] The purpose of the present application is to provide an annular discharge electrode pair array and a shock wave balloon catheter. The annular discharge electrode pair array can form multiple electrode pairs through a plurality of inner electrodes arranged in an inner tube and an outer electrode sleeved on the outer wall of the inner tube, and generate an omnidirectional acoustic pressure wave inside the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can cover the three valve leaflets around the shock wave balloon at the same time, thereby improving the stability of the clinical effect.

[0006] In a first aspect, an embodiment of the present application provides an annular discharge electrode pair array, which includes: an inner tube, a plurality of inner electrodes, and a first outer electrode; the first outer electrode is in an annular structure; the first outer electrode is sleeved on the outer wall of the inner tube; a multi-chamber structure or a multi-groove structure is uniformly arranged in the tube wall of the inner tube; one inner electrode is installed in each chamber or each groove; each inner electrode and the first outer electrode form an electrode pair; when the plurality of electrode pairs are energized, they are used to generate an omnidirectional acoustic pressure wave.

[0007] In a preferred embodiment of the present application, a face groove is further provided at the center of the end of the inner tube; the annular discharge electrode pair array further includes: a second outer electrode; the second outer electrode is arranged in the face groove; each inner electrode also forms an electrode pair with the second outer electrode.

[0008] In a preferred embodiment of the present application, the above-mentioned plurality of inner electrodes are connected in series or in parallel; the plurality of serially or paralleled inner electrodes form an electrode pair with any outer electrode.

[0009] In a preferred embodiment of the present application, the minimum distance between the outer edge of the face groove and the outer edge of each chamber in the multi-chamber structure, and the minimum distance between the outer edge of the face groove and the outer edge of each groove in the multi-groove structure are both between 0.01 mm and 0.50 mm.

[0010] In a preferred embodiment of the present application, the wall thickness of the first outer electrode is between 0.03 mm and 1.00 mm.

[0011] In a preferred embodiment of the present application, the above-mentioned multi-chamber structure or multi-groove structure is provided in the wall of the entire inner tube, in the wall of a part of the inner tube, or at the end of the wall of the inner tube.

[0012] In a preferred embodiment of the present application, the distance between the edge of each chamber in the above-mentioned multi-chamber structure close to the outer wall of the inner tube and the outer wall of the inner tube is between 0.01 mm and 0.50 mm.

[0013] In a preferred embodiment of the present application, when a uniformly distributed multi-groove structure is provided in the wall of the inner tube, the outer surface of the inner electrode is coated with an insulating material; the thickness of the insulating material is between 0.01 mm and 0.50 mm.

[0014] In a preferred embodiment of the present application, the number of the above-mentioned multiple inner electrodes is greater than or equal to 3.

[0015] In a second aspect, the embodiment of the present application further provides a shock wave balloon catheter, which includes: a balloon, a wire, and the annular discharge electrode array as described in the first aspect; wherein, the inner tube in the annular discharge electrode array penetrates through the balloon; each inner electrode and each outer electrode in the annular discharge electrode array are connected to a wire; multiple wires are led out from the tail of the inner tube of the annular discharge electrode array; or the wires connected to the multiple inner electrodes are converged into one wire and the wires connected to each outer electrode are led out at the tail; when the inner electrodes and the outer electrodes are energized through multiple wires, multiple electrode pairs formed by the inner electrodes and the outer electrodes generate an omnidirectional and relatively energy-uniform acoustic pressure wave around the balloon.

[0016] In the annular discharge electrode array and the shock wave balloon catheter provided by the embodiment of the present application, the annular discharge electrode array includes: an inner tube, multiple inner electrodes, and a first outer electrode; the first outer electrode is in a ring structure; the first outer electrode is sleeved on the outer wall of the inner tube; a uniformly distributed multi-chamber structure or multi-groove structure is provided in the wall of the inner tube; one inner electrode is installed in each chamber or each groove; each inner electrode and the first outer electrode form an electrode pair; multiple electrode pairs are used to generate an omnidirectional acoustic pressure wave when energized. In the embodiment of the present application, the annular discharge electrode array can form multiple electrode pairs through multiple inner electrodes provided in the inner tube and an outer electrode sleeved on the outer wall of the inner tube, and generate an omnidirectional acoustic pressure wave in the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can simultaneously cover three valve leaflets around the shock wave balloon, thereby improving the stability of the clinical effect. Description of the Drawings

[0017] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of an annular discharge electrode array provided by an embodiment of the present application;

[0019] Figure 2 Another structural schematic diagram of an annular discharge electrode array provided by an embodiment of the present application;

[0020] Figure 3 Another structural schematic diagram of an annular discharge electrode array provided by an embodiment of the present application;

[0021] Figure 4 Another structural schematic diagram of an annular discharge electrode array provided by an embodiment of the present application;

[0022] Figure 5 Another structural schematic diagram of an annular discharge electrode array provided by an embodiment of the present application;

[0023] Figure 6 Structural schematic diagram of a shock wave balloon catheter provided by an embodiment of the present application;

[0024] Figure 7 Another structural schematic diagram of a shock wave balloon catheter provided by an embodiment of the present application;

[0025] Figure 8 Working schematic diagram of a shock wave balloon catheter provided by an embodiment of the present application;

[0026] Figure 9 Structural schematic diagram of a parallel connection of internal electrodes provided by an embodiment of the present application;

[0027] Figure 10 Structural schematic diagram of a series connection of internal electrodes provided by an embodiment of the present application. Specific embodiments

[0028] The following will clearly and completely describe the technical solutions of the present application in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0029] Currently, in the design of aortic valve shock wave balloon catheters, single independent discharge electrode pairs or arrays of discharge electrode pairs composed of interleaved wires connected in series are often used. These discharge electrode pairs cannot release omnidirectional acoustic pressure waves inside the balloon. Only when facing and approaching the valve leaflets can the acoustic pressure waves they release achieve the purpose of fracturing the calcified lesions of the valve leaflets. Since these discharge electrode pairs cannot well match the valve leaflet structure of the aorta, the energy of the acoustic pressure waves generated by them cannot cover the three valve leaflets around the shock wave balloon at the same time, resulting in unstable clinical effects or limited clinical benefits.

[0030] Based on this, the embodiments of the present application provide an annular discharge electrode pair array and a shock wave balloon catheter. The annular discharge electrode pair array can form multiple electrode pairs through a plurality of inner electrodes arranged in the inner tube and an annular outer electrode sleeved on the outer wall of the inner tube, generating omnidirectional acoustic pressure waves inside the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can cover the three valve leaflets around the shock wave balloon at the same time, thereby improving the stability of clinical effects.

[0031] For the convenience of understanding this embodiment, first, a detailed introduction is given to an annular discharge electrode pair array disclosed in the embodiments of the present application.

[0032] Figure 1 FIG. 10 is a schematic diagram of an annular discharge electrode pair array provided by an embodiment of the present application. The annular discharge electrode pair array includes: an inner tube, a plurality of inner electrodes (3 are shown in the figure), and a first outer electrode; the first outer electrodes are all annular structures; the first outer electrode is sleeved on the outer wall of the inner tube; a multi-chamber structure or a multi-groove structure is uniformly distributed in the tube wall of the inner tube; one inner electrode is installed in each chamber or each groove; each inner electrode and the first outer electrode form an electrode pair; a plurality of electrode pairs are used to generate omnidirectional acoustic pressure waves when energized.

[0033] The above inner electrode can be an electrode with an annular structure, a solid structure, or an electrode with other structures, which is not specifically limited here; the above first outer electrode and inner electrode are both made of metal materials, which can be stainless steel, platinum, nitinol, copper, or other conductive materials; the inner tube is made of non-metallic materials. The distance between each chamber in the above multi-chamber structure and the outer wall of the inner tube is between 0.01 mm and 0.50 mm, preferably 0.03 mm, near the edge of the outer wall of the inner tube. The above multi-chamber structure or multi-groove structure can be arranged in the tube wall of the whole inner tube, the tube wall of a part of the inner tube, or the end of the tube wall of the inner tube.

[0034] When a multi-groove structure is uniformly distributed in the tube wall of the inner tube, the outer surface of the inner electrode is coated with an insulating material. The insulating material includes one of the following: polyimide, polytetrafluoroethylene, and Teflon, and the thickness of the insulating material is between 0.01 mm and 0.50 mm.

[0035] The above-mentioned multiple inner electrodes are connected in series or in parallel; multiple serially-connected inner electrodes and a first outer electrode form an electrode pair, or multiple parallely-connected inner electrodes and a first outer electrode form an electrode pair.

[0036] The above-mentioned multi-chamber structure can be a 3-chamber, 4-chamber, 5-chamber or more chambers; the above-mentioned multi-groove structure can be a 3-groove, 4-groove, 5-groove or more grooves; one inner electrode is installed in one chamber or one groove. Therefore, the number of inner electrodes installed in the chambers or grooves is usually greater than or equal to three. In this way, at least three electrode pairs composed of inner electrodes and outer electrodes can simultaneously perform high-voltage discharge, thereby generating an omnidirectional acoustic pressure wave inside the balloon. The omnidirectional acoustic pressure wave can cover three valve leaflets around the balloon, achieving a stable clinical effect.

[0037] In the annular discharge electrode pair array provided by the embodiment of the present application, the annular discharge electrode pair array includes: an inner tube, multiple inner electrodes and a first outer electrode; the first outer electrode is of an annular structure; the first outer electrode is sleeved on the outer wall of the inner tube; a multi-chamber structure or a multi-groove structure with uniform distribution is arranged in the tube wall of the inner tube; one inner electrode is installed in each chamber or each groove; each inner electrode and the first outer electrode form an electrode pair; multiple electrode pairs are used to generate an omnidirectional acoustic pressure wave when energized. In the embodiment of the present application, the annular discharge electrode pair array can form multiple electrode pairs through multiple inner electrodes arranged in the inner tube and an outer electrode sleeved on the outer wall of the inner tube, and generate an omnidirectional acoustic pressure wave inside the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can simultaneously cover three valve leaflets around the shock wave balloon, thereby improving the stability of the clinical effect.

[0038] Based on the above embodiments, two specific annular discharge electrode pair arrays are listed below:

[0039] The first one: Refer to Figure 2 As shown, in this annular discharge electrode pair array, the inner tube is made of a non-metallic material and has a four-chamber structure; the four-chamber structure can be arranged in the tube wall of the entire inner tube, or only arranged at the end of the tube wall of the above-mentioned inner tube or in a part of the tube wall of the inner tube. The distance between the edge of each chamber in the four-chamber structure close to the outer wall of the inner tube and the outer wall of the inner tube is between 0.01 mm and 0.50 mm, preferably 0.03 mm. One inner electrode is arranged in each chamber, and an annular first outer electrode is arranged on the outer wall of the inner tube; both the inner electrode and the first outer electrode are made of conductive metal materials, which can be stainless steel, platinum, nitinol, copper, or other conductive materials. The wall thickness of the first outer electrode is 0.03 - 1.00 mm, preferably 0.05 mm.

[0040] The second one: Refer to Figure 3As shown, in the annular discharge electrode array, the inner tube has a special-shaped structure with grooves on its outer periphery, and four grooves are taken as an example in the figure. The multi-groove structure exists on the wall of the entire inner tube, or can only exist at the end of the inner tube wall and / or a part of the wall. The inner core of the inner electrode is made of conductive metal material, which can be stainless steel, platinum, nitinol, copper, or other conductive materials. At the same time, an insulating material is coated on the surface of the inner electrode. The insulating material can be polyimide, polytetrafluoroethylene, Teflon, etc. The thickness of the insulating material is between 0.01 mm and 0.50 mm, preferably 0.03 mm. The insulating material is coated between the outer surface of the inner electrode and the outer electrode to form an insulating relationship, and a breakdown-type discharge path can be formed between the inner and outer electrodes when energized. The above inner electrode is placed in the groove of the inner tube, and one inner electrode is placed in one groove. After placing the inner electrode, a circular ring structure is formed by a part of the outer wall of the inner electrode and the outer wall of the inner tube, and the first outer electrode is sleeved on the circular ring structure composed of the inner electrode and the inner tube. The first outer electrode is made of conductive metal material, which can be stainless steel, platinum, nitinol, copper, or other conductive materials. The first outer electrode is a circular ring structure, and the wall thickness of the first outer electrode is between 0.03 mm and 1.00 mm, preferably 0.05 mm.

[0041] In a preferred embodiment of the present application, a end face groove is further provided at the center of the end of the above inner tube; the annular discharge electrode array further includes: a second outer electrode; the second outer electrode is arranged in the end face groove; each inner electrode also forms an electrode pair with the second outer electrode. The inner tube is a circular ring structure with a certain wall thickness, and the groove formed on the inner tube is also circular, so the second outer electrode is also a circular ring structure.

[0042] Multiple series-connected inner electrodes and the second outer electrode can also form an electrode pair, or multiple parallel-connected inner electrodes and the second outer electrode form an electrode pair.

[0043] The minimum distance between the outer edge of the above end face groove and the outer edge of each cavity in the multi-cavity structure, and the minimum distance between the outer edge of the end face groove and the outer edge of each groove in the multi-groove structure are both between 0.01 mm and 0.50 mm; preferably 0.03 mm. The wall thickness of the above second outer electrode is 0.03 - 1.00 mm, preferably 0.05 mm.

[0044] Next, two annular discharge electrode arrays are listed:

[0045] The first one: See Figure 4As shown in the figure, in the annular discharge electrode array, the inner tube is made of non-metallic material, has a four-chamber structure and an end face groove. The multi-chamber structure exists in the tube wall of the entire inner tube, or can only exist at the end of the tube wall of the inner tube or in a part of the tube wall. The distance between each chamber in the above multi-chamber structure and the outer wall of the inner tube is between 0.01 mm and 0.50 mm, preferably 0.03 mm. The minimum distance between the outer edge of the end face groove of the inner tube and the outer edge of each chamber in the inner tube is between 0.01 mm and 0.50 mm, preferably 0.03 mm. The inner electrode is placed in the multi-chambers of the inner tube, and one inner electrode is arranged in one chamber; the first outer electrode is sleeved on the outer wall of the inner tube, and the second outer electrode is arranged in the end face groove; the above inner electrode, the first outer electrode and the second outer electrode are all made of conductive metal material, which can be stainless steel, platinum, nitinol, copper, or other conductive materials. The first outer electrode, the second outer electrode and the inner electrode are all annular structures, and the wall thickness is between 0.03 mm and 1.00 mm, preferably 0.05 mm.

[0046] The second type: Refer to Figure 5 As shown in the figure, in the annular discharge electrode array, the inner tube is of a special-shaped structure, and grooves are arranged on the outer periphery and the middle of the end face. The outer periphery can have 3 grooves, 4 grooves, 5 grooves or more grooves. The multi-groove structure exists in the tube wall of the entire inner tube, or can only exist at the end of the tube wall of the inner tube or in a part of the tube wall. The minimum distance between the outer edge of the end face groove of the inner tube and the outer edge of the outer peripheral groove is between 0.01 mm and 0.50 mm, preferably 0.03 mm. The inner core of the inner electrode is made of conductive metal material, which can be stainless steel, platinum, nitinol, copper, or other conductive materials. At the same time, an insulating material is coated on the surface of the inner electrode. The insulating material can be polyimide, polytetrafluoroethylene, teflon, etc. The thickness of the insulating material is between 0.01 mm and 0.50 mm, preferably 0.03 mm. The inner electrode is placed in the grooves around the inner tube. The first outer electrode is sleeved on the outer wall of the inner tube, and the second inner electrode is arranged in the end face groove of the inner tube. The outer electrodes are all annular structures, and the wall thickness is between 0.03 mm and 1.00 mm, preferably 0.05 mm.

[0047] An annular discharge electrode array provided by an embodiment of the present application is composed of an inner tube, a plurality of inner electrodes and outer electrodes. Through various structural designs of the inner electrodes and outer electrodes (including but not limited to the number, distance, size and connection method), multiple electrode pairs (more than 3) are synchronously subjected to high-voltage discharge, generating an omnidirectional sound pressure wave with relatively uniform energy around the balloon, so that when the shock wave balloon catheter is used for disease treatment, it can simultaneously cover three valve leaflets around the shock wave balloon, thereby improving the stability of the clinical effect.

[0048] Based on the above-described embodiments of the annular discharge electrode array, an embodiment of the present application further provides a shock wave balloon catheter, which includes: a balloon, a wire, and the annular discharge electrode array as described in the above embodiments; wherein, the inner tube in the annular discharge electrode array penetrates through the balloon; each inner electrode and each outer electrode in the annular discharge electrode array are connected to a wire; multiple wires are led out from the tail of the inner tube of the annular discharge electrode array; or the wires connected to multiple inner electrodes are converged into one wire and the wires connected to each outer electrode are led out at the tail; when the inner electrodes and the outer electrodes are energized through multiple wires, multiple electrode pairs formed by the inner electrodes and the outer electrodes generate an omnidirectional and relatively energy-uniform acoustic pressure wave around the balloon.

[0049] Figure 6 The schematic diagram of the shock wave balloon catheter showing that there is only one outer electrode in the annular discharge electrode array is shown; Figure 7 The schematic diagram of the shock wave balloon catheter showing that there are two outer electrodes in the annular discharge electrode array is shown, such as outer electrode 1 and outer electrode 2 in the figure. Figure 8 The working schematic diagram of the shock wave balloon catheter in actual application is shown.

[0050] In the embodiment of the present application, there are two connection methods for multiple inner electrodes. One is the parallel connection method of inner electrodes. Refer to Figure 9 As shown, each inner electrode is independently connected to a wire, and each outer electrode is independently connected to a wire. The other end of each wire is connected to a high-voltage output device. When the wires are energized through the high-voltage output device, multiple inner electrodes and outer electrodes form discharge electrode pairs, and multiple electrode pairs can discharge independently or perform high-voltage discharge simultaneously. The other is the series connection method of inner electrodes. Refer to Figure 10 As shown, after multiple inner electrodes are separately connected to a wire, they are converged into one wire at a certain place through a connection device. Each outer electrode is separately connected to a wire. The other end of the converged wire and the wire connected to the outer electrode are connected to a high-voltage output device. When the wires are energized through the high-voltage output device, multiple inner electrodes and outer electrodes form discharge electrode pairs and perform high-voltage discharge simultaneously. The series connection method of inner electrodes makes the simultaneous high-voltage discharge more stable.

[0051] The above shock wave balloon catheter is composed of a balloon, an annular discharge electrode array, and wires. In the annular discharge electrode array, a single inner electrode can form an independent electrode pair with any outer electrode, or several inner electrodes are connected in series / parallel to form an electrode pair with any outer electrode. In this way, multiple electrode pairs can perform high-voltage discharge synchronously, and an omnidirectional and relatively energy-uniform acoustic pressure wave can be generated around the balloon.

[0052] The above-mentioned shock wave balloon catheter can support a flexible discharge control mechanism. The annular discharge electrode pairs in the balloon can synchronously discharge at high voltage. When multiple electrode pairs (more than 3) synchronously discharge at high voltage, an omnidirectional and relatively energy-uniform acoustic pressure wave can be generated around the balloon.

[0053] The annular discharge electrode pairs in the above-mentioned shock wave balloon catheter can be any of the structures described above or similar structures not described.

[0054] The beneficial effects of the embodiments of the present application compared with the prior art are as follows:

[0055] The annular discharge electrode pairs provided in the shock wave balloon catheter can generate omnidirectional acoustic pressure wave energy compared with traditional discharge electrode pairs or arrays. It can simultaneously produce good treatment effects on the calcified lesions of the three valve leaflets in contact with the periphery of the balloon, greatly reducing the pretreatment time of valve leaflet calcification and creating better surgical conditions for artificial valve implantation.

[0056] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] Finally, it should be noted that the above-mentioned embodiments are only specific embodiments of the present application, used to illustrate the technical solutions of the present application, rather than limiting them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A ring-shaped discharge electrode array, characterized in that, The annular discharge electrode array includes: an inner tube, a plurality of inner electrodes, and a first outer electrode; the first outer electrode is in a ring structure; the first outer electrode is sleeved on the outer wall of the inner tube; a multi-chamber structure or a multi-groove structure is arranged uniformly in the tube wall of the inner tube; one of the inner electrodes is installed in each chamber or each groove; each of the inner electrodes and the first outer electrode form an electrode pair for releasing a shock wave radially outward from the inner tube. A face groove is further arranged at the center of the end of the inner tube; the annular discharge electrode array further includes: a second outer electrode; the second outer electrode is arranged in the face groove, the second outer electrode is spaced from the plurality of inner electrodes by a certain distance and is in a ring structure, and in the end face cross-section, the plurality of inner electrodes are located between the first outer electrode and the second outer electrode; each of the inner electrodes and the second outer electrode form an electrode pair for releasing a shock wave in the distal direction of the inner tube; the plurality of inner electrodes are connected in series or in parallel; the plurality of serially or parallely connected inner electrodes form an electrode pair with any one of the first outer electrode and the second outer electrode. When powered on, the plurality of electrode pairs are used to generate an omnidirectional acoustic pressure wave, including a shock wave radially outward from the inner tube and a shock wave in the distal direction of the inner tube.

2. The annular discharge electrode array according to claim 1, wherein The minimum distance between the outer edge of the face groove and the outer edge of each chamber in the multi-chamber structure, and the minimum distance between the outer edge of the face groove and the outer edge of each groove in the multi-groove structure are both between 0.01 mm and 0.50 mm.

3. The annular discharge electrode pair array according to claim 1, wherein The wall thickness of the first outer electrode is between 0.03 mm and 1.00 mm.

4. The annular discharge electrode array according to claim 1, characterized in that, The multi-chamber structure or the multi-groove structure is arranged in the tube wall of the whole inner tube, in the tube wall of a part of the inner tube, or at the end of the tube wall of the inner tube.

5. The annular discharge electrode pair array according to claim 1, characterized in that, The distance between the edge of each chamber in the multi-chamber structure close to the outer wall of the inner tube and the outer wall of the inner tube is between 0.01 mm and 0.50 mm respectively.

6. The annular discharge electrode pair array according to claim 1, characterized in that, When a multi-groove structure is arranged uniformly in the tube wall of the inner tube, the outer surface of the inner electrode is coated with an insulating material, and the thickness of the insulating material is between 0.01 mm and 0.50 mm.

7. The annular discharge electrode array according to claim 1, characterized in that, The number of the plurality of inner electrodes is greater than or equal to 3.

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