Shock wave balloon catheter device

Abstract

In one embodiment of the present application, there is provided a shock wave balloon catheter device comprising a catheter; a balloon; the balloon has a folded state and an unfolded state; the balloon can be filled with liquid; when the balloon is in an unfolded state, the balloon is spirally wound on the catheter; a discharge electrode; the discharge electrodes are arranged in the balloon, and when voltage is applied between the discharge electrodes, the discharge electrodes are configured to emit discharge shock waves in the liquid in the balloon. In the embodiment of the utility model, the balloon in the unfolded state is spirally wound on the catheter, so that a gap for blood flow to pass through is formed between the balloon and the catheter, and the blood can be kept to circulate in a blood vessel in the treatment process.

Description

Technical Field

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

[0002] As heart disease patients age and the disease progresses, plaques in peripheral blood vessels and coronary arteries gradually calcify. This bone-like structure can cause narrowing of the vessels, reduce blood flow in the vessels, and may eventually lead to complete occlusion of the vessels.

[0003] A shock wave balloon catheter device is provided for vascular calcification lesions. During treatment, the balloon on the catheter is pushed into the vascular calcification area. The balloon is then inflated and pressurized with liquid. A high voltage pulse is applied to the electrode pair in the balloon, causing the electrode pair to discharge and generate shock waves in the liquid. The shock wave hits the balloon wall, rupturing the calcified plaque. After the calcified plaque ruptures, the balloon can be further inflated to open the blood vessel. After entering the blood vessel, the above-mentioned balloon needs to remain in the expanded state for a long time. The expanded balloon will cause the blood vessel to occlude, resulting in obstruction of blood flow in the blood vessel, endangering the health and safety of the patient. Summary of the invention

[0004] An embodiment of the present application provides a shock wave balloon catheter device, and when the balloon is in an expanded state, blood can flow in the blood vessel.

[0005] In one embodiment of the present application, a shock wave balloon catheter device is provided, comprising:

[0006] catheter;

[0007] A balloon; the balloon has a folded state and an unfolded state; the balloon can be filled with liquid; when the balloon is in the unfolded state, the balloon is spirally wound around the catheter;

[0008] Discharge electrode; the discharge electrode is arranged in the balloon, and when a voltage is applied between the discharge electrodes, the discharge electrode is configured to emit a discharge shock wave in the liquid in the balloon.

[0009] In this embodiment, the balloon in the expanded state is spirally wound on the catheter, so that there is a gap between the balloon and the catheter for blood to flow through, and blood can be kept circulating in the blood vessels during the treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application 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 of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0011] Figure 1 A schematic diagram of the structure of a shock wave balloon catheter device provided in one embodiment of the present application;

[0012] Figure 2 A schematic diagram of the structure of a discharge electrode provided in one embodiment of the present application;

[0013] Figure 3 A schematic diagram of the position layout of electrode pairs provided in one embodiment of the present application;

[0014] Figure 4 A schematic structural diagram of a shock wave balloon catheter device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the present application.

[0016] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element in the middle. The "proximal end" in this application refers to the side close to the operator, and the "distal end" refers to the side away from the operator.

[0017] The following will be combined Figures 1 to 4 The shock wave balloon catheter device of the embodiment of this specification is explained and described. It should be noted that in the embodiment of the present invention, the same reference numerals represent the same components. For the sake of brevity, the detailed description of the same components is omitted in different embodiments, and the descriptions of the same components can be referenced and quoted to each other.

[0018] As heart disease patients age and the disease progresses, plaques in peripheral blood vessels and coronary arteries gradually calcify. This bone-like structure can cause narrowing of the vessels, reduce blood flow in the vessels, and may eventually lead to complete occlusion of the vessels.

[0019] The indications of the shock wave balloon catheter device include interventional treatment of vascular calcification lesions. The shock wave balloon catheter device includes a catheter, a balloon sealed around the outer circumference of the catheter, and at least one electrode pair arranged in the balloon; the balloon can be filled with liquid; each of the electrode pairs includes a first electrode and a second electrode; when a voltage is applied between the first electrode and the second electrode, a plasma arc is formed in the liquid in the balloon between the first electrode and the second electrode, thereby generating bubbles in the liquid, which expand and collapse, and then forming a mechanical shock wave in the balloon, which is mechanically transmitted through the liquid and the balloon to apply mechanical force or pressure to split any calcified plaque on or in the wall of the vascular system.

[0020] When the device is used clinically, the balloon in a decompressed state should first be delivered to the site of the calcified lesion, and the balloon should be pressurized to ensure that it fits tightly against the blood vessel wall; then a voltage is applied between the first electrode and the second electrode, and the liquid in the balloon between the first electrode and the second electrode forms a discharge shock wave. The shock wave impacts and destroys the calcified lesion, causing the calcification of the intima and the media to break. The modification effect of the calcified lesion can be judged by evaluating the symmetrical expansion of the balloon.

[0021] The shock wave balloon catheter device efficiently and safely destroys superficial and deep calcifications, thereby significantly improving vascular compliance. The device is effective not only for superficial and deep calcifications, but also for eccentric and non-eccentric lesions, reducing the risk of complications such as dissection and perforation.

[0022] The balloon in the above embodiment is as follows Figure 4 As shown, after the balloon enters the blood vessel, it needs to remain in the expanded state for a long time. The cross-section of at least a portion of the expanded balloon is roughly circular, which will block the blood vessel, causing obstruction of blood flow in the blood vessel and endangering the health and safety of the patient.

[0023] In addition, the electrode pair in the above implementation is usually arranged on the catheter inside the balloon; therefore, the electrode pair is located at the approximate axis of the blood vessel, that is, the shortest distance between the electrode pair and the inner wall of the balloon is approximately the radius of the blood vessel at the corresponding position. The shock wave generated by the electrode pair needs to propagate in the liquid inside the balloon to the inner wall of the balloon, thereby producing a lithotripsy treatment effect. When the shock wave propagates in the liquid inside the balloon, its energy is gradually attenuated; therefore, the larger the diameter of the blood vessel, the longer the distance the shock wave needs to propagate, and the more serious the shock wave energy attenuation, which may lead to poor treatment effect; in some test experiments, when the shock wave propagation distance exceeds 3mm, the shock wave intensity is significantly weakened, and it is difficult to effectively destroy the calcified lesions in the blood vessel, and the treatment effect is significantly reduced. For shock wave treatment of peripheral arterial and valvular heart disease, the diameter of the balloon will reach about 10mm, and the effect of treatment by the above shock wave balloon catheter device is not good.

[0024] To solve the above technical problems, an embodiment of the present application provides a shock wave balloon catheter device, such as Figure 1 Shown, including

[0025] Catheter 1;

[0026] Balloon 2; the balloon 2 has a folded state and an unfolded state; the balloon 2 can be filled with liquid; when the balloon 2 is in the unfolded state, the balloon 2 is spirally wound on the catheter 1, and the balloon 2 is attached to the inner wall of the blood vessel; the balloon 2 can be made of a compliant material, such as silicone, thermoplastic elastomer (TPE);

[0027] Discharge electrode; the discharge electrode is arranged in the balloon 2, and when a voltage is applied between the discharge electrodes, the discharge electrode is configured to emit a discharge shock wave in the liquid in the balloon 2.

[0028] In this embodiment, the balloon 2 in the expanded state is spirally wound on the catheter 1, so that there is a gap between the balloon 2 and the catheter 1, and blood can be kept flowing in the blood vessels during the treatment process.

[0029] In addition, in this embodiment, the discharge electrode is arranged in the spiral balloon 2, and the discharge electrode is not located near the axis of the blood vessel. The shortest distance between the discharge electrode and the inner wall of the balloon 2 is smaller than the radius of the blood vessel, which shortens the propagation distance of the shock wave and makes the shock wave energy applied to the inner wall of the balloon 2 stronger.

[0030] In an optional embodiment, the catheter comprises an inner catheter and an outer catheter; the outer catheter is sleeved on the outer periphery of the inner catheter; the distal end of the outer catheter is connected to the proximal end of the balloon; the inner wall of the outer catheter and the outer wall of the inner catheter define a channel, and the channel is used to perfuse liquid into the balloon;

[0031] The distal end of the balloon is sealed and connected to the inner catheter; when the balloon is in an expanded state, the balloon is spirally wound around the inner catheter.

[0032] Optionally, the discharge electrode is attached to the inner wall of the balloon 2. Specifically, the discharge electrode includes a first electrode attached to the inner wall of the balloon 2 and a second electrode attached to the inner wall of the balloon 2; when a voltage is applied between the first electrode and the second electrode, the first electrode and the second electrode are configured to emit a discharge shock wave in the liquid in the balloon 2. In order to further reduce the propagation distance of the shock wave, the discharge electrode can be attached to the inner wall of the balloon 2 that is attached to the blood vessel; or the connection position between the discharge electrode and the inner wall of the balloon 2 can be selected as needed to control the propagation distance of the shock wave.

[0033] Alternatively, the discharge electrode includes a first electrode attached to the inner wall of the balloon 2, an intermediate electrode unit attached to the inner wall of the balloon 2, and a second electrode attached to the inner wall of the balloon 2; there is a gap between the first electrode and the intermediate electrode unit and they form an electrode pair; there is a gap between the intermediate electrode unit and the second electrode and they form an electrode pair; when a voltage is applied between the first electrode and the second electrode, each of the electrode pairs is configured to form a discharge arc in the liquid, respectively, to allow current to pass through the first electrode, the intermediate electrode unit, and the second electrode in sequence.

[0034] Wherein, the intermediate electrode unit includes a first intermediate electrode, a second intermediate electrode, ..., an Nth intermediate electrode, N≥1; wherein, the first electrode and the first intermediate electrode have a gap and constitute an electrode pair; the i-th intermediate electrode and the i+1-th intermediate electrode have a gap and constitute an electrode pair, 1≤i≤N-1; the Nth intermediate electrode and the second electrode have a gap and constitute an electrode pair; when a voltage is applied between the first electrode and the second electrode, each of the electrode pairs is configured to form a discharge arc in the liquid respectively to allow current to pass through the first electrode, the first intermediate electrode, the second intermediate electrode, ..., the Nth intermediate electrode, and the second electrode in sequence.

[0035] In an optional embodiment of the structure of the discharge electrode, the discharge electrode includes a first insulated wire attached to the inner wall of the balloon 2, an intermediate insulated wire unit attached to the inner wall of the balloon 2, and a second insulated wire attached to the inner wall of the balloon 2;

[0036] An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode;

[0037] The insulating layer of the middle insulated wire unit is provided with two discrete openings; one of the openings of the middle insulated wire unit is used to expose a portion of the conductor of the middle insulated wire unit to form a first middle electrode; the other opening of the middle insulated wire unit is used to expose another portion of the conductor of the middle insulated wire unit to form a second middle electrode;

[0038] An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode;

[0039] When a voltage is applied between the first electrode and the second electrode, an electrode pair is formed between the first electrode and the first intermediate electrode to form a discharge arc, and an electrode pair is formed between the second intermediate electrode and the second electrode to form a discharge arc, so as to allow current to pass through the first insulated wire, the intermediate insulated wire unit and the second insulated wire in sequence.

[0040] The conductor material of the insulated wire can be copper, platinum-iridium alloy, tungsten steel, etc. The cross-sectional shape of the conductor can be circular, elliptical, rectangular or any other shape; the insulating layer can be lacquer, insulating coating, rubber tube, etc., and this application does not limit this. The opening in this application can be a local opening in the insulating layer, or a section of the insulating layer can be peeled off in the form of a sheath.

[0041] In an optional embodiment, the intermediate insulated wire unit includes an intermediate insulated wire. The discharge electrode includes a first insulated wire attached to the inner wall of the balloon 2, a first intermediate insulated wire attached to the inner wall of the balloon 2, and a second insulated wire attached to the inner wall of the balloon 2;

[0042] An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode;

[0043] The insulating layer of the first intermediate insulated conductor is provided with two discrete openings; one of the openings of the first intermediate insulated conductor is used to expose a portion of the conductor of the first intermediate insulated conductor to form a first intermediate electrode; the other opening of the first intermediate insulated conductor is used to expose another portion of the conductor of the first intermediate insulated conductor to form a second intermediate electrode;

[0044] An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode;

[0045] When a voltage is applied between the first electrode and the second electrode, an electrode pair is formed between the first electrode and the first intermediate electrode to form a discharge arc, and an electrode pair is formed between the second intermediate electrode and the second electrode to form a discharge arc, so as to allow current to pass through the first insulated wire, the first intermediate insulated wire and the second insulated wire in sequence.

[0046] In another optional embodiment, the intermediate insulated wire unit includes two intermediate insulated wires. The discharge electrode includes a first insulated wire attached to the inner wall of the balloon 2, a first intermediate insulated wire attached to the inner wall of the balloon 2, a second intermediate insulated wire attached to the inner wall of the balloon 2, and a second insulated wire attached to the inner wall of the balloon 2;

[0047] An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode;

[0048] The insulating layer of the first intermediate insulated conductor is provided with two discrete openings; one of the openings of the first intermediate insulated conductor is used to expose a portion of the conductor of the first intermediate insulated conductor to form a first intermediate electrode; the other opening of the first intermediate insulated conductor is used to expose another portion of the conductor of the first intermediate insulated conductor to form a second intermediate electrode;

[0049] The insulating layer of the second intermediate insulated conductor is provided with two discrete openings; one of the openings of the second intermediate insulated conductor is used to expose a portion of the conductor of the second intermediate insulated conductor to form a second intermediate electrode; the other opening of the second intermediate insulated conductor is used to expose another portion of the conductor of the second intermediate insulated conductor to form a second intermediate electrode;

[0050] An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode;

[0051] The first electrode and the first intermediate electrode of the first intermediate insulated wire form an electrode pair; the second intermediate electrode of the first intermediate insulated wire and the first intermediate electrode of the second intermediate insulated wire form an electrode pair; the second intermediate electrode of the second intermediate insulated wire and the second electrode form an electrode pair;

[0052] When a voltage is applied between the first insulated conductor and the second insulated conductor, each of the electrode pairs forms a discharge arc to allow current to flow through the first electrode, the first intermediate insulated conductor, the second intermediate insulated conductor, and the second electrode in sequence.

[0053] In yet another alternative embodiment, Figure 2 As shown, the intermediate insulated wire unit includes three intermediate insulated wires. The discharge electrode includes a first insulated wire 301 attached to the inner wall of the balloon 2, a first intermediate insulated wire 401 attached to the inner wall of the balloon 2, a second intermediate insulated wire 402 attached to the inner wall of the balloon 2, a third intermediate insulated wire 403 attached to the inner wall of the balloon 2, and a second insulated wire 302 attached to the inner wall of the balloon 2;

[0054] An opening is provided on the insulating layer of the first insulated wire 301; the opening of the first insulated wire 301 is used to expose a portion of the conductor of the first insulated wire 301 to form a first electrode;

[0055] The insulating layer of the first intermediate insulated conductor 401 is provided with two discrete openings; one of the openings of the first intermediate insulated conductor 401 is used to expose a portion of the conductor of the first intermediate insulated conductor 401 to form a first intermediate electrode; the other opening of the first intermediate insulated conductor 401 is used to expose another portion of the conductor of the first intermediate insulated conductor 401 to form a second intermediate electrode;

[0056] The insulating layer of the second intermediate insulated conductor 402 is provided with two discrete openings; one of the openings of the second intermediate insulated conductor 402 is used to expose a portion of the conductor of the second intermediate insulated conductor 402 to form a first intermediate electrode; the other opening of the second intermediate insulated conductor 402 is used to expose another portion of the conductor of the second intermediate insulated conductor 402 to form a second intermediate electrode;

[0057] The insulating layer of the third intermediate insulated conductor 403 is provided with two discrete openings; one of the openings of the third intermediate insulated conductor 403 is used to expose a portion of the conductor of the third intermediate insulated conductor 403 to form a first intermediate electrode; the other opening of the second intermediate insulated conductor 402 is used to expose another portion of the conductor of the second intermediate insulated conductor 402 to form a second intermediate electrode;

[0058] An opening is provided on the insulating layer of the second insulated wire 302; the opening of the second insulated wire 302 is used to expose a portion of the conductor of the second insulated wire 302 to form a second electrode;

[0059] The first electrode and the first intermediate electrode of the first intermediate insulated wire 401 form an electrode pair 5; the second intermediate electrode of the first intermediate insulated wire 401 and the first intermediate electrode of the second intermediate insulated wire 402 form an electrode pair 5; the second intermediate electrode of the second intermediate insulated wire 402 and the first intermediate electrode of the third intermediate insulated wire 403 form an electrode pair 5; the second intermediate electrode of the third intermediate insulated wire 403 and the second electrode form an electrode pair 5;

[0060] When a voltage is applied between the first insulated conductor 301 and the second insulated conductor 302, each of the electrode pairs 5 forms a discharge arc to allow current to pass through the first electrode, the first intermediate insulated conductor 401, the second intermediate insulated conductor 402, the third intermediate insulated conductor 403, and the second electrode in sequence.

[0061] In another optional embodiment, the intermediate insulated wire unit includes three or more intermediate insulated wires. The discharge electrode includes a first insulated wire attached to the inner wall of the balloon 2, a second insulated wire attached to the inner wall of the balloon 2, and a first intermediate insulated wire, a second intermediate insulated wire, ..., an Mth intermediate insulated wire attached to the inner wall of the balloon 2; wherein M≥3;

[0062] An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode;

[0063] An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode;

[0064] The conductive wire insulation layer of the kth intermediate insulated wire is provided with at least two discrete openings; the two openings of the kth intermediate insulated wire are used to expose a portion of the conductor of the kth intermediate insulated wire to form a first intermediate electrode and a second intermediate electrode respectively; wherein 1≤k≤M;

[0065] The first electrode and the first intermediate electrode of the first intermediate insulated conductor form an electrode pair;

[0066] The second intermediate electrode of the jth intermediate insulated wire and the first intermediate electrode of the j+1th intermediate insulated wire form an electrode pair; the first intermediate electrode of the jth intermediate insulated wire and the second intermediate electrode of the j-1th intermediate insulated wire form an electrode pair; wherein 2≤j≤M-1;

[0067] The second intermediate electrode of the Mth intermediate insulated conductor and the second electrode form an electrode pair;

[0068] When a voltage is applied between the first insulated conductor and the second insulated conductor, each of the electrode pairs forms a discharge arc to allow current to pass through the first insulated conductor, the first intermediate insulated conductor, the second intermediate insulated conductor, ..., the Mth intermediate insulated conductor, and the second insulated conductor in sequence.

[0069] In the above embodiment, optionally, the second insulated wire passes through a gap between two electrodes of at least one electrode pair; thus, the second insulated wire can keep the two electrodes of the electrode pair insulated and separated, thereby preventing the two electrodes of the electrode pair from being electrically connected. Figure 2 In the illustrated embodiment, the second insulated conductive wire 302 passes through a gap between two electrodes of each electrode pair 5 .

[0070] In the above embodiment, if Figure 3As shown, optionally, a plurality of electrode pairs 5 are arranged spirally along the extension direction of the balloon 2 .

[0071] It should be noted that, in the description of this specification, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this specification, unless otherwise specified, the meaning of "plurality" is two or more.

[0072] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit of the present application should be included in the protection scope of the present application.

[0073] It should be understood that the above description is for illustration and not for limitation. By reading the above description, many embodiments and many applications beyond the provided examples will be apparent to those skilled in the art. For comprehensive purposes, all articles and references, including the disclosures of patent applications and announcements, are incorporated herein by reference.

Claims

1. A shock wave balloon catheter device, Features: include catheter; A balloon; the balloon has a folded state and an unfolded state; the balloon can be filled with liquid; when the balloon is in the unfolded state, the balloon is spirally wound around the catheter; Discharge electrode; The discharge electrodes are disposed in the balloon, and when a voltage is applied between the discharge electrodes, the discharge electrodes are configured to emit discharge shock waves in the liquid in the balloon.

2. The device according to claim 1, Features: The catheter comprises an inner catheter and an outer catheter; the outer catheter is sleeved on the outer periphery of the inner catheter; the distal end of the outer catheter is connected to the proximal end of the balloon; the inner wall of the outer catheter and the outer wall of the inner catheter define a channel, and the channel is used to perfuse liquid into the balloon; The distal end of the balloon is sealed and connected to the inner catheter; when the balloon is in an expanded state, the balloon is spirally wound around the inner catheter.

3. The device according to claim 1, Features: The discharge electrode is attached to the inner wall of the balloon.

4. The device according to claim 1, Features: The discharge electrode includes a first electrode attached to the inner wall of the balloon, an intermediate electrode unit attached to the inner wall of the balloon, and a second electrode attached to the inner wall of the balloon; there is a gap between the first electrode and the intermediate electrode unit and they form an electrode pair; there is a gap between the intermediate electrode unit and the second electrode and they form an electrode pair; when a voltage is applied between the first electrode and the second electrode, each of the electrode pairs is configured to form a discharge arc in the liquid respectively to allow current to pass through the first electrode, the intermediate electrode unit, and the second electrode in sequence.

5. The device as claimed in claim 4, Features: The intermediate electrode unit includes a first intermediate electrode, a second intermediate electrode, ..., an Nth intermediate electrode, N≥1; wherein the first electrode and the first intermediate electrode have a gap and constitute an electrode pair; the i-th intermediate electrode and the i+1-th intermediate electrode have a gap and constitute an electrode pair, 1≤i≤N-1; the Nth intermediate electrode and the second electrode have a gap and constitute an electrode pair; when a voltage is applied between the first electrode and the second electrode, each of the electrode pairs is configured to form a discharge arc in the liquid, respectively, to allow current to pass through the first electrode, the first intermediate electrode, the second intermediate electrode, ..., the Nth intermediate electrode, and the second electrode in sequence.

6. The device according to claim 1, Features: The discharge electrode comprises a first insulated wire attached to the inner wall of the balloon, an intermediate insulated wire unit attached to the inner wall of the balloon, and a second insulated wire attached to the inner wall of the balloon; An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode; The insulating layer of the middle insulated wire unit is provided with two discrete openings; one of the openings of the middle insulated wire unit is used to expose a portion of the conductor of the middle insulated wire unit to form a first middle electrode; the other opening of the middle insulated wire unit is used to expose another portion of the conductor of the middle insulated wire unit to form a second middle electrode; An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode; When a voltage is applied between the first electrode and the second electrode, an electrode pair is formed between the first electrode and the first intermediate electrode to form a discharge arc, and an electrode pair is formed between the second intermediate electrode and the second electrode to form a discharge arc, so as to allow current to pass through the first insulated wire, the intermediate insulated wire unit and the second insulated wire in sequence.

7. The device according to claim 1, Features: The discharge electrode comprises a first insulated wire attached to the inner wall of the balloon, a first middle insulated wire attached to the inner wall of the balloon, and a second insulated wire attached to the inner wall of the balloon; An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode; The insulating layer of the first intermediate insulated conductor is provided with two discrete openings; one of the openings of the first intermediate insulated conductor is used to expose a portion of the conductor of the first intermediate insulated conductor to form a first intermediate electrode; the other opening of the first intermediate insulated conductor is used to expose another portion of the conductor of the first intermediate insulated conductor to form a second intermediate electrode; An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode; When a voltage is applied between the first electrode and the second electrode, an electrode pair is formed between the first electrode and the first intermediate electrode to form a discharge arc, and an electrode pair is formed between the second intermediate electrode and the second electrode to form a discharge arc, so as to allow current to pass through the first insulated wire, the first intermediate insulated wire and the second insulated wire in sequence.

8. The device according to claim 1, Features: The discharge electrode comprises a first insulated wire attached to the inner wall of the balloon, a first middle insulated wire attached to the inner wall of the balloon, a second middle insulated wire attached to the inner wall of the balloon, and a second insulated wire attached to the inner wall of the balloon; An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode; The insulating layer of the first intermediate insulated conductor is provided with two discrete openings; one of the openings of the first intermediate insulated conductor is used to expose a portion of the conductor of the first intermediate insulated conductor to form a first intermediate electrode; the other opening of the first intermediate insulated conductor is used to expose another portion of the conductor of the first intermediate insulated conductor to form a second intermediate electrode; The insulating layer of the second intermediate insulated conductor is provided with two discrete openings; one of the openings of the second intermediate insulated conductor is used to expose a portion of the conductor of the second intermediate insulated conductor to form a second intermediate electrode; the other opening of the second intermediate insulated conductor is used to expose another portion of the conductor of the second intermediate insulated conductor to form a second intermediate electrode; An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode; The first electrode and the first intermediate electrode of the first intermediate insulated wire form an electrode pair; the second intermediate electrode of the first intermediate insulated wire and the first intermediate electrode of the second intermediate insulated wire form an electrode pair; the second intermediate electrode of the second intermediate insulated wire and the second electrode form an electrode pair; When a voltage is applied between the first insulated conductor and the second insulated conductor, each of the electrode pairs forms a discharge arc to allow current to flow through the first electrode, the first intermediate insulated conductor, the second intermediate insulated conductor, and the second electrode in sequence.

9. The device according to claim 1, Features: The discharge electrode comprises a first insulated wire attached to the inner wall of the balloon, a second insulated wire attached to the inner wall of the balloon, and a first intermediate insulated wire, a second intermediate insulated wire, ..., an Mth intermediate insulated wire attached to the inner wall of the balloon; wherein M≥3; An opening is provided on the insulating layer of the first insulated wire; the opening of the first insulated wire is used to expose a portion of the conductor of the first insulated wire to form a first electrode; An opening is provided on the insulating layer of the second insulated wire; the opening of the second insulated wire is used to expose a portion of the conductor of the second insulated wire to form a second electrode; The conductive wire insulation layer of the kth intermediate insulated wire is provided with at least two discrete openings; the two openings of the kth intermediate insulated wire are used to expose a portion of the conductor of the kth intermediate insulated wire to form a first intermediate electrode and a second intermediate electrode respectively; wherein 1≤k≤M; The first electrode and the first intermediate electrode of the first intermediate insulated conductor form an electrode pair; The second intermediate electrode of the jth intermediate insulated wire and the first intermediate electrode of the j+1th intermediate insulated wire form an electrode pair; the first intermediate electrode of the jth intermediate insulated wire and the second intermediate electrode of the j-1th intermediate insulated wire form an electrode pair; wherein 2≤j≤M-1; The second intermediate electrode of the Mth intermediate insulated conductor and the second electrode form an electrode pair; When a voltage is applied between the first insulated conductor and the second insulated conductor, each of the electrode pairs forms a discharge arc to allow current to pass through the first insulated conductor, the first intermediate insulated conductor, the second intermediate insulated conductor, ..., the Mth intermediate insulated conductor, and the second insulated conductor in sequence.

10. The device according to any one of claims 4 to 9, Features: The plurality of electrode pairs are arranged spirally along the extension direction of the balloon.

11. The device according to any one of claims 6 to 9, Features: The second insulated conductive wire passes through a gap between two electrodes of at least one electrode pair.

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