Shock wave balloon dilatation catheter with corona generator

Abstract

The present invention discloses a shock wave balloon dilatation catheter with a corona generator, comprising a dilatation balloon, an outer tube, and an inner tube. The distal end of the inner tube extends beyond the distal end of the outer tube, the proximal end of the dilatation balloon is sealedly connected to the distal end of the outer tube, and the distal end of the dilatation balloon is sealedly connected to the distal end of the inner tube. The dilatation balloon is provided with a corona generator, the corona generator comprising at least one electrode group, each electrode group comprising at least one first electrode connected to a positive lead and at least one second electrode connected to a negative lead. The first and second electrodes in the electrode groups are spaced apart, and discharge regions are provided on the first and second electrodes that contact an electrolyte liquid filled in the cavity of the dilatation balloon, so as to form an electric field between the first and second electrodes. The first and second electrodes are fixed to the inner tube. Compared with existing technologies, the present invention can improve the safety, ease of operation, reusability, and precise controllability of the balloon catheter.

Description

Technical Field

[0001] The present invention relates to a medical device, in particular to a shock wave balloon dilatation catheter with a corona generator based on liquid corona discharge. Background Art

[0002] In the medical device field, balloon catheters are primarily used to dilate narrowed blood vessels, a treatment method that has been proven to be sufficiently safe and effective. Currently, balloon catheters primarily inflate the balloon based on the principle of arc discharge, a discharge phenomenon in which a high-density plasma channel is formed through a dielectric under high voltage. Arc discharge occurs when the dielectric between electrodes is completely broken down under high voltage conditions, forming a continuous high-temperature, high-density plasma channel. Arc discharge is a strong discharge phenomenon characterized by high temperature and high current density. Arc discharge is an overall effect, with the arc penetrating the dielectric between electrodes, forming a continuous high-temperature, high-current channel. Under sufficiently high electric fields, the liquid dielectric is completely broken down, forming a high-density plasma channel. This process is accompanied by intense energy release and high temperature generation. The shock wave energy of arc discharge is enormous and difficult to control precisely, which may cause unforeseen damage to surrounding tissues; the shock wave effect of arc discharge is strong, and although it can quickly break up calcified plaques, it has a greater impact on surrounding vascular tissues, which may cause vascular damage or other complications; the high-energy shock wave of arc discharge may cause high-risk complications such as blood vessel rupture and thrombosis; during the arc discharge process, the high temperature in the arc area may spread to the surrounding tissues, causing unnecessary thermal damage. The shock wave effect of arc discharge is strong at one time, making it difficult to perform multiple treatments with precise control and cumulative effects. Summary of the Invention

[0003] The purpose of the present invention is to provide a shock wave balloon dilatation catheter with a corona generator, and the technical problem to be solved is to improve the safety, reusability and precise controllability of the balloon catheter.

[0004] To solve the above problems, the present invention adopts the following technical solution: a shock wave balloon dilatation catheter with a corona generator, comprising a dilatation balloon, an outer tube, and an inner tube, wherein the inner tube is arranged inside the outer tube and the two are coaxial, the distal end of the inner tube extends outside the distal end of the outer tube, the proximal end of the dilatation balloon is sealedly connected to the distal end of the outer tube, and the distal end of the dilatation balloon is sealedly connected to the distal end of the inner tube, and a corona generator is provided in the dilatation balloon, the corona generator includes at least one electrode group, each electrode group includes at least one first electrode connected to the positive electrode wire and at least one second electrode connected to the negative electrode wire, the first electrode and the second electrode in the electrode group are arranged at intervals, and a discharge area is provided on the first electrode and the second electrode, which is in contact with the electrolyte liquid filled in the cavity of the dilatation balloon, so that an electric field is formed between the first electrode and the second electrode, and the first electrode and the second electrode are fixed on the inner tube.

[0005] Furthermore, the positive and negative electrode wires are provided with exposed areas connected to the first electrode and the second electrode, and the exposed areas are covered with metal electrode sleeves, which are fixedly connected to the first electrode and the second electrode.

[0006] Furthermore, the first electrode and the second electrode are ring-shaped, and grooves are formed on the inner wall edges of the first electrode and the second electrode, and the metal electrode sleeves are fixed on the grooves.

[0007] Furthermore, a first insulating layer and a second insulating layer are respectively provided at positions other than the discharge region on the outer walls of the first electrode and the second electrode to expose the discharge region.

[0008] Furthermore, at least one first through hole is provided on the first electrode, and at least one second through hole is provided on the second electrode. The first through hole and the second through hole respectively constitute a discharge area. The first insulating layer completely covers the other positions of the first electrode except the first through hole, and the second insulating layer completely covers the other positions of the second electrode except the second through hole, so as to form a directional electric field between the first electrode and the second electrode.

[0009] Furthermore, the annular edges at opposite ends of the first electrode and the second electrode form a discharge area, the first insulating layer completely covers the first through hole except the annular edge, and the second insulating layer completely covers the second electrode except the annular edge, thereby forming a directional electric field between the first electrode and the second electrode.

[0010] Furthermore, the annular edges at one end of the first electrode and the second electrode facing away from each other form a discharge area, the first insulating layer completely covers the first through hole except the annular edge, and the second insulating layer completely covers the second electrode except the annular edge, thereby forming a directional electric field between the first electrode and the second electrode.

[0011] Furthermore, the electrode group is provided as a group, including a first electrode and a second electrode.

[0012] Furthermore, the electrode group is provided as a group, including two first electrodes and one second electrode, and the second electrode is provided between the two first electrodes.

[0013] Furthermore, the electrode groups are provided in two groups, wherein one electrode group includes two first electrodes and one second electrode, and the other electrode group includes one first electrode and one second electrode.

[0014] Compared with existing technologies, the present invention incorporates a corona generator within the expansion balloon. This corona generator receives a pulsed electrical signal from a power pulse generator. This pulsed electrical signal causes a corona reaction in the electrolyte liquid, ionizing the electrolyte liquid molecules. The steam bubbles generated by the ionized molecules squeeze the electrolyte liquid, increasing the pressure within the expansion balloon and driving the balloon to expand radially along the inner tube. This improves the safety, ease of use, reusability, and precise controllability of the balloon catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the shock wave balloon dilatation catheter of the present invention.

[0016] Figure 2 yes Figure 1 Cross-sectional view in the AA direction.

[0017] Figure 3 yes Figure 1 Cross-sectional view in the BB direction.

[0018] Figure 4 This is a schematic diagram of the structure of the electrode group of the present invention. Figure 1 .

[0019] Figure 5 This is a schematic diagram of the structure of the electrode group of the present invention. Figure 2 .

[0020] Figure 6 Schematic diagram of the electric field of the first electrode group of the present invention.

[0021] Figure 7 Schematic diagram of the electric field of the second electrode group of the present invention.

[0022] Figure 8 Schematic diagram of the electric field of the third electrode group of the present invention.

[0023] Figure 9 Schematic diagram of the electric field of the fourth electrode group of the present invention.

[0024] Figure 10 Schematic diagram of steam bubbles generated behind the electrode group of the present invention.

[0025] Figure 11 This is a diagram showing the relationship between the discharge area and the current size of the present invention.

[0026] Figure 12 This is a diagram showing the relationship between the electron path and the current size of the present invention.

[0027] Figure 13 It is a schematic structural diagram of the present invention with two electrodes.

[0028] Figure 14It is a circuit diagram of the present invention with two electrodes.

[0029] Figure 15 It is a schematic structural diagram of the present invention with three electrodes.

[0030] Figure 16 Schematic diagram of the circuit of the present invention with three electrodes.

[0031] Figure 17 Schematic diagram of the structure of two electrode groups of the present invention.

[0032] Figure 18 Schematic diagram of the circuit of two electrode groups of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] In the present invention, the distal end refers to the end away from the surgical operator; the proximal end refers to the end close to the surgical operator.

[0035] like Figures 1 to 3 As shown, the present invention discloses a shock wave balloon dilatation catheter with a corona generator, comprising a dilatation balloon 6, an outer tube 7, and an inner tube 8, wherein the inner tube 8 is arranged in the outer tube 7 and the two are coaxially arranged, the outer diameter of the inner tube 8 is smaller than the inner diameter of the outer tube 7, so that a liquid passage for the electrolyte liquid is formed between the two, the distal end of the inner tube 8 extends out of the distal end of the outer tube 7, the proximal end of the dilatation balloon 6 is sealedly connected to the distal end of the outer tube 7, the distal end of the dilatation balloon 6 is sealedly connected to the distal end of the inner tube 7, the inner cavity of the dilatation balloon 6 is connected to the liquid passage, a corona generator is provided in the dilatation balloon 6, the corona generator comprises at least one electrode group 1, each electrode group 1 comprises at least one first electrode 11 connected to the positive lead and at least one second electrode 12 connected to the negative lead, the positive lead and The negative electrode wire is electrically connected to the existing power pulse generator 9 through an electrical connector. A discharge area 13 in contact with the electrolyte liquid filled in the cavity of the expansion balloon 6 is provided on the first electrode 11 and the second electrode 12, so that an electric field is formed between the first electrode 11 and the second electrode 12. The corona generator receives the pulse electric signal sent by the power pulse generator 9. Under the action of the pulse electric signal, corona discharge is generated in the discharge area 13 to cause a corona reaction in the electrolyte liquid. The electrolyte liquid produces molecular ionization, and steam bubbles generated by the molecular ionization are formed at the position of the discharge area 13, and the electrolyte liquid is squeezed to increase the pressure in the expansion balloon 6, driving the expansion balloon 6 to expand radially along the inner tube 8. The first electrode 11 and the second electrode 12 are fixed to the inner tube 8 by gluing or welding.

[0036] like Figure 1As shown, a PET heat shrink tube 2 can be placed between the inner tube 8 and the wire to fix the wire on the inner tube 8. Of course, the inner tube 8 and the wire can also be formed into one piece by co-extrusion.

[0037] The corona generator is placed in the electrolyte liquid; the corona generator receives the pulse electrical signal sent by the power pulse generator 9, causing the electrolyte liquid to undergo a corona reaction, causing the liquid to produce molecular ionization; the plasma generated by the molecular ionization vaporizes the surrounding liquid at high temperature to produce steam bubbles; as the ionization reaction continues, the volume of the steam bubbles continues to expand and squeeze the surrounding liquid environment. Due to the non-squeezable nature of the liquid, the internal pressure of the expansion balloon 6 is forced to increase instantly, driving the expansion balloon 6 to expand radially (such as Figure 10 The time of the ionization reaction is determined by the pulse signal duration and pulse width parameters.

[0038] like Figures 3 to 5 As shown, an exposed area connected to the first electrode 11 and the second electrode 12 is provided on the positive and negative electrode wires, and the remaining areas of the positive and negative electrode wires are wrapped with an insulating layer. The positive and negative electrode wires can be provided with a metal electrode sleeve 3 along the exposed area of ​​the inner tube. The metal electrode sleeve 3 is flat and is connected and fixed to the exposed area by gluing or pressing, so that the metal electrode sleeve 3 is tightly connected to the exposed area. The metal electrode sleeve 3 is connected and fixed to the first electrode 11 and the second electrode 12 by welding.

[0039] like Figure 4 and Figure 5 As shown, the first electrode 11 and the second electrode 12 in the present invention are ring-shaped, specifically circular ring-shaped, Figure 4 and Figure 5 Taking the first electrode 11 as an example, a groove 14 is formed on the inner wall edge of the first electrode 11 and the second electrode 12, and the metal electrode sleeve 3 is welded on the groove 14. Specifically, the overall size of the groove 14 can be smaller than the overall size of the metal electrode sleeve 3, so as to form a contact position on the first electrode 11 and the second electrode 12 that can be welded with the metal electrode sleeve 3. Figure 4 and Figure 5 In the position of “X” shown in FIG, the metal electrode sleeve 3 is connected with the first electrode 11 and the second electrode 12 .

[0040] In the present invention, Figure 2 and Figure 3 As shown, in the outer walls of the first electrode 11 and the second electrode 12, the first insulating layer 4 and the second insulating layer 5 are respectively provided at positions other than the discharge area 13 to expose the discharge area 13 and insulate the remaining positions, so that the electrodes receive the pulse electrical signals sent by the power pulse generator 9 and form a directional electric field between the electrodes.

[0041] As the first electrode group structure of the present invention, Figure 6 As shown, the first electrode 11 is provided with at least one first through-hole 111, and the second electrode 12 is provided with at least one second through-hole 121. The first through-hole 111 and the second through-hole 121 respectively constitute a discharge region 13. The first insulating layer 4 completely covers the first electrode 11 except for the first through-hole 111, and the second insulating layer 5 completely covers the second electrode 12 except for the second through-hole 121. The first electrode 11 and the second electrode 12 receive the pulsed electrical signal sent by the power pulse generator 9, and form a directional electric field between the electrodes. Under the action of the pulsed electrical signal, the electrolyte liquid undergoes a corona reaction. The potential distribution direction of this electrode group structure is relatively concentrated, which is conducive to reducing heat generation. The electron passage path is relatively concentrated, the resistance is relatively large, the current is reduced, and the safety is increased. It is conducive to steady-state symmetrical pressurization inside the balloon, so that the expanded balloon expands uniformly as a whole.

[0042] The first insulating layer 4 and the second insulating layer 5 can reduce the contact area between the first electrode 11 and the second electrode 12 and the electrolyte liquid, and discharge the charge in the controlled discharge area 13 .

[0043] As a preference of this embodiment, the first through hole 111 is symmetrically arranged on the first electrode 11, and the second through hole 121 is symmetrically arranged on the second electrode 12. The two first through holes 111 and the two second through holes 121 are respectively arranged in one-to-one correspondence, and the metal electrode sleeve can be set at any position on the inner ring wall of the first electrode 11 and the second electrode 12.

[0044] In this embodiment, the interval between the first through hole 111 on the first electrode 11 and the second through hole 121 on the adjacent second electrode 12 is set to 4-8 mm.

[0045] from Figure 6 It can be seen that the electric field formed in this embodiment forms two regions of electric field between the two opposite through holes of the two electrodes, from the second through hole 121 of the second electrode 12 toward the first through hole 111 of the first electrode 11, and causes the electrolyte liquid to undergo a corona reaction under the action of the pulse electric signal.

[0046] When the first electrode group forms an electric field, the generated steam bubbles are distributed at the positions of the first through holes 111 and the second through holes 121 .

[0047] As the second electrode group structure of the present invention, Figure 7 As shown, the first insulating layer 4 and the second insulating layer 5 are not wrapped around the first electrode 11 and the second electrode 12, so as to realize an omnidirectional electric field. Figure 7 The process of corona discharge from the second electrode 12 to the first electrode 11 is simulated, and the electric field is divergent and has a wider range.

[0048] When the second electrode group forms an electric field, the generated steam bubbles are evenly distributed around the periphery of the first electrode 11 and the second electrode 12 .

[0049] The second electrode group structure can release electric charge outward over the largest area, forming a larger current and steam bubbles. The charge distribution is more dispersed. Under the same excitation conditions, the pulse energy is larger, the bubble expansion volume is larger, the inside of the balloon applies greater pressure outward, and the outward expansion force is stronger. It is suitable for thicker and stubborn calcifications.

[0050] As the third electrode group structure of the present invention, Figure 8 As shown, the annular edges at one end opposite to the first electrode 11 and the second electrode 12 form a discharge region 13, the first insulating layer 4 completely covers the first through hole 111 except the annular edge, and the second insulating layer 5 completely covers the second electrode 12 except the annular edge, so as to form an electric field between the opposite sides of the first electrode 11 and the second electrode 12.

[0051] like Figure 8 As shown, since the discharge area 13 is annular, it will generate an electric field in the circumferential direction.

[0052] When the electric field is formed at the third electrode group, steam bubbles are generated at the annular edges surrounding the opposite sides of the two electrodes.

[0053] The third electrode group structure has the shortest potential direction path, which can cause steam bubbles to be generated between the first electrode 11 and the second electrode 12. The steam bubbles are largest at the midpoint between the first electrode 11 and the second electrode 12. The generated force is transmitted outward from between the first electrode 11 and the second electrode 12, and a large combined force for outward expansion is generated between the first electrode 11 and the second electrode 12.

[0054] As the fourth electrode group structure of the present invention, Figure 9 As shown, the annular edge at one end of the first electrode 11 and the second electrode 12 facing away from each other forms a discharge region 13, the first insulating layer 4 completely covers the first through hole 111 except the annular edge, and the second insulating layer 5 completely covers the second electrode 12 except the annular edge, so as to form an electric field between the facing sides of the first electrode 11 and the second electrode 12.

[0055] like Figure 9 As shown, since the discharge region 13 is located farther away from the first electrode 11 and the second electrode 12 , the directional electric field formed therein is farther away than the directional electric fields of the first and third electrode group structures.

[0056] When the fourth electrode group forms an electric field, steam bubbles are generated around the annular edges of the two electrodes facing away from each other. The electric potential direction path of the fourth electrode group structure is the farthest, and the force generated moves from the boundary of the expansion balloon toward the center. The expansion balloon preferentially expands outward from the proximal and distal ends. This discharge method can reduce the local concentration of the electric field, making the electric field distribution around the balloon more balanced, which is conducive to more stable energy transfer. At the same time, the preferential expansion of both sides of the balloon can make the balloon expand more evenly, reduce the phenomenon of uneven local expansion of the balloon, and help the balloon maintain a better shape and stability during the expansion process.

[0057] In the present invention, the electrode assembly is made of high-temperature resistant materials such as 304 stainless steel, 316 stainless steel, or tungsten-containing alloys. While maintaining excellent electrical conductivity, the material must be able to withstand the thermal erosion of the high-temperature plasma generated during corona discharge. The electrode assembly is spaced to prevent arcing and breakdown discharge between the electrodes. This spacing is filled with electrolyte liquid to form a conductive path. Under certain parameters, a longer spacing increases the resistance of the conductive path and reduces the resulting current.

[0058] Figure 10 The bubbles generated by the corona discharge of the first electrode group structure are shown, which are concentrated at the first through hole 111 of the first electrode 11 and the second through hole 121 of the second electrode 12. As the electrode power-on process continues, the steam bubbles will continue to grow until they push the expansion balloon 6 to expand, thereby completing the treatment.

[0059] like Figure 11 and Figure 12 As shown in the figure, among the four electrode group structures mentioned above, the first one is defined as A, the second one is defined as B, the third one is defined as C, and the fourth one is defined as D. It can be seen from the figure that in the first electrode group structure, the area of ​​the discharge region is 0.002mm 2 , the length of the electron path is 4.6mm, the current value is 7A, and the total area of ​​the discharge area is 0.23mm in the second electrode group structure. 2 , the current value is 20A, and when the third electrode group structure is used, the area of ​​the discharge region is 0.132mm 2 The length of the electron path is 4 mm, the current value is about 15 A, and the area of ​​the discharge region is 0.132 mm for the fourth electrode group structure. 2 , the length of the electron path is 9.2mm and the current value is 10A.

[0060] like Figure 13 and Figure 14As shown, when the corona generator includes a group of electrode groups, the electrode group includes a first electrode 11 and a second electrode 12, the first electrode 11 is connected to the positive electrode of the power pulse generator 9, and the second electrode 12 is connected to the negative electrode of the power pulse generator 9. The two electrodes receive the pulse electrical signal of the power pulse generator 9, and an electric field is formed between the discharge areas of the electrodes. Under the action of the pulse electrical signal, the electrolyte liquid undergoes a corona reaction.

[0061] like Figure 15 and Figure 16 As shown, when the corona generator includes a group of electrode groups, the electrode group includes two first electrodes 11 and one second electrode 12, and the second electrode 12 is arranged between the two first electrodes 11 with equal spacing; wherein, the two first electrodes 11 are connected to the positive pole of the power pulse generator 9, and the second electrode 11 is connected to the negative pole of the power pulse generator 9; the two first electrodes 11 and the second electrode 12 receive the pulse electrical signal sent by the power pulse generator 9, and form an electric field between the discharge areas of the two electrodes, and under the action of the pulse electrical signal, the electrolyte liquid undergoes a corona reaction.

[0062] like Figure 17 and Figure 18 As shown, when the corona generator includes two groups of electrode groups, one group of electrode groups includes two first electrodes 11 and one second electrode 12, and the other group of electrode groups includes one first electrode 11 and one second electrode 12: in one electrode group 1 with three electrodes, the second electrode 12 is arranged between the two first electrodes 11, and the electrodes of the two electrode groups are arranged at equal distances; wherein, the three first electrodes 11 are connected to the positive pole of the power pulse generator 9, and the two second electrodes 12 are connected to the negative pole of the power pulse generator 9; the two groups of electrode groups 1 receive the pulse electrical signal sent by the power pulse generator 4, and form an electric field between their respective electrodes, and under the action of the pulse electrical signal, the electrolyte liquid undergoes a corona reaction; preferably, the first electrodes 11 and the second electrodes 12 in the two electrode groups are staggered.

[0063] like Figure 14 、 Figure 16 and Figure 17 As shown, one end of the capacitor C in the power pulse generator 9 is electrically connected to an IGBT (insulated gate bipolar transistor), and the IGBT is divided into two paths, one path is electrically connected to one end of the first resistor R1, and the other path is electrically connected to the relay group K, and the relay group K is electrically connected to the first electrode 11 as the positive electrode; the other end of the first resistor R1 and the other end of the capacitor C are respectively electrically connected to one end of the second resistor R2, and the other end of the second resistor R2 is electrically connected to the second electrode 12.

[0064] Capacitor C stores high-voltage charges, and the first resistor R1 and the second resistor R2 are the working loads at both ends of the relay group K, respectively, to protect the circuit safety; when the high-voltage charge needs to be released to the electrode, the circuit is disconnected through the cooperation of IGBT (insulated gate bipolar transistor) and relay group K. When one of the switches of relay group K is closed, the IGBT is turned on, and the high-voltage charge stored in capacitor C is released through the connected circuit, forming a high-voltage pulse; when corona needs to be generated between multiple pairs of electrodes simultaneously or sequentially, multiple energy storage capacitors and multiple relays are coordinated to manage the circuit disconnection.

[0065] The power pulse generator 9 can set the voltage value (1000-8000V) and the time pulse width (1-200us) of the circuit for releasing the charge.

[0066] The present invention can be used to treat vascular stenosis and calcification. When in use, under the guidance of imaging, the shock wave balloon dilatation catheter (balloon dilatation catheter) is introduced into the target site, i.e., the target blood vessel segment, through the guide wire; when the dilatation balloon 6 is not filled with electrolyte solution, the balloon dilatation catheter can smoothly pass through the stenosis and calcification area; when the balloon dilatation catheter reaches the target position, the electrolyte liquid is filled into the dilatation balloon 6 through the catheter system (catheter) to a preset pressure, so that it adheres to the blood vessel wall, ensuring that the dilatation balloon 6 is in full contact with the lesion area, and applying pulsed high voltage, such as Figure 10 As shown, the corona generator generates a corona discharge. The corona discharge phenomenon causes the electrolyte liquid to generate steam bubbles, squeezing the electrolyte liquid, causing the pressure in the expansion balloon 6 to continuously increase, and then transmitting the pressure to the target site, breaking up the calcified material and expanding the blood vessel cavity. According to the degree of the lesion and the treatment needs, multiple corona discharges can be performed to ensure that the lesion site is completely cleared. After each discharge, the expansion balloon 6 can be slightly drained to change its diameter, and the position of the balloon expansion catheter is adjusted to cover the entire lesion area. After the treatment is completed, the internal liquid is drained, the expansion balloon 6 is retracted, and the balloon expansion catheter is withdrawn from the body. An imaging examination is performed after the operation to confirm the patency of the blood vessels, thereby achieving a good therapeutic effect. This solution can effectively break up the calcium in the calcified lesions in the blood vessels through the controllable instantaneous radial expansion of the balloon, preparing for subsequent vascular treatment. Because it is an arc discharge process, the high temperature in the arc area will spread to the surrounding tissues, causing unnecessary thermal damage. However, the present invention adopts corona discharge, which significantly improves the effectiveness, safety, ease of operation, reusability and precise control during the interventional treatment of calcified blood vessels.

Claims

1. A shock wave balloon dilatation catheter with a corona generator, comprising a dilatation balloon (6), an outer tube (7), and an inner tube (8), wherein the inner tube (8) is arranged inside the outer tube (7) and the two are coaxial, the distal end of the inner tube (8) extends outside the distal end of the outer tube (7), the proximal end of the dilatation balloon (6) is sealedly connected to the distal end of the outer tube (7), and the distal end of the dilatation balloon (6) is sealedly connected to the distal end of the inner tube (8), characterized in that: A corona generator is provided in the expansion balloon (6), the corona generator comprising at least one electrode group (1), each electrode group (1) comprising at least one first electrode (11) connected to a positive electrode wire and at least one second electrode (12) connected to a negative electrode wire, the first electrode (11) and the second electrode (12) in the electrode group (1) are spaced apart, a discharge region (13) in contact with an electrolyte liquid filled in the cavity of the expansion balloon (6) is provided on the first electrode (11) and the second electrode (12), so that an electric field is formed between the first electrode (11) and the second electrode (12), and the first electrode (11) and the second electrode (12) are fixed on the inner tube (8); In the outer walls of the first electrode (11) and the second electrode (12), positions other than the discharge region (13) are provided with a first insulating layer (4) and a second insulating layer (5), respectively, so as to expose the discharge region (13); The first electrode (11) is provided with at least one first through hole (111), the second electrode (12) is provided with at least one second through hole (121), the first through hole (111) and the second through hole (121) respectively constitute a discharge region (13), the first insulating layer (4) completely covers the first electrode (11) except the first through hole (111), and the second insulating layer (5) completely covers the second electrode (12) except the second through hole (121), so as to form a directional electric field between the first electrode (11) and the second electrode (12), or The annular edges of the first electrode (11) and the second electrode (12) at opposite ends form a discharge region (13), the first insulating layer (4) completely covers the first through hole (111) except the annular edge, and the second insulating layer (5) completely covers the second electrode (12) except the annular edge, so as to form a directional electric field between the first electrode (11) and the second electrode (12), or The annular edges at one end of the first electrode (11) and the second electrode (12) that are separated from each other form a discharge region (13); the first insulating layer (4) completely covers the first through hole (111) except the annular edge; and the second insulating layer (5) completely covers the second electrode (12) except the annular edge, so as to form a directional electric field between the first electrode (11) and the second electrode (12).

2. The shock wave balloon dilatation catheter with a corona generator according to claim 1, characterized in that: The positive and negative lead wires are provided with exposed areas connected to the first electrode (11) and the second electrode (12), and the exposed areas are covered with a metal electrode sleeve (3), which is fixedly connected to the first electrode (11) and the second electrode (12).

3. The shock wave balloon dilatation catheter with a corona generator according to claim 2, characterized in that: The first electrode (11) and the second electrode (12) are annular, and grooves (14) are formed on the inner wall edges of the first electrode (11) and the second electrode (12), and the metal electrode sleeve (3) is fixed on the groove (14).

4. The shock wave balloon dilatation catheter with a corona generator according to any one of claims 1 to 3, characterized in that: The electrode group (1) is provided with a group comprising a first electrode (11) and a second electrode (12).

5. The shock wave balloon dilatation catheter with a corona generator according to any one of claims 1 to 3, characterized in that: The electrode group (1) is provided with a group comprising two first electrodes (11) and a second electrode (12), wherein the second electrode (12) is provided between the two first electrodes (11).

6. The shock wave balloon dilatation catheter with a corona generator according to any one of claims 1 to 3, characterized in that: The electrode group (1) is provided with two groups, wherein one electrode group (1) comprises two first electrodes (11) and one second electrode (12), and the other electrode group (1) comprises one first electrode (11) and one second electrode (12).

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