Shockwave balloon dilation catheter having corona generator

Abstract

Disclosed is a shockwave balloon dilation catheter having a corona generator, comprising a dilation balloon (6), an outer tube (7), and an inner tube (8). The distal end of the inner tube (8) extends out of the distal end of the outer tube (7), the proximal end of the dilation balloon (6) is sealingly connected to the distal end of the outer tube (7), and the distal end of the dilation balloon (6) is sealingly connected to the distal end of the inner tube (8). The corona generator is provided in the dilation balloon (6). The corona generator comprises at least one electrode group (1), and each electrode group (1) comprises 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, and the first electrode (11) and the second electrode (12) are provided with discharge regions (13) in contact with an electrolyte liquid filled in a cavity of the dilation balloon (6), so that an electric field is formed between the first electrode (11) and the second electrode (12). The first electrode (11) and the second electrode (12) are fixed in the inner tube (8). The shockwave balloon dilation catheter can improve the safety, ease of operation, reusability, and precise control of the balloon catheter.

Description

Shockwave balloon dilation catheter with corona generator TECHNICAL FIELD

[0001] The present application relates to a medical device, in particular to a shockwave balloon dilation catheter with corona generator based on liquid corona discharge. BACKGROUND

[0002] In the field of medical devices, balloon catheters are mainly used for dilating narrow blood vessels, and this treatment method has been proven to be safe and effective. Currently, balloon catheters mainly inflate the balloon based on the principle of electric arc discharge. Electric arc discharge is a discharge phenomenon that forms a high-density plasma channel through a medium under high voltage. Electric arc discharge is a complete breakdown of the medium between the electrodes under high voltage conditions, forming a continuous high-temperature and high-density plasma channel. Electric arc discharge is a strong discharge phenomenon with high temperature and high current density. Electric arc discharge is a whole effect, and the electric arc penetrates the medium between the electrodes, forming a continuous high-temperature and high-current channel. Under a high enough electric field, the liquid medium is completely broken down to form a high-density plasma channel, and this process is accompanied by intense energy release and high temperature. The shock wave energy of electric arc discharge is huge and difficult to control accurately, which may cause unpredictable damage to the surrounding tissues. The shock wave of electric arc discharge is strong, although it can quickly break up calcified plaques, but the impact on the surrounding vascular tissue is large, which may lead to vascular injury or other complications. The high-energy shock wave of electric arc discharge may cause high-risk complications such as blood vessel rupture and thrombus formation. During the electric arc discharge process, the high temperature in the electric arc area may spread to the surrounding tissues, causing unnecessary thermal damage. The shock wave of electric arc discharge is strong and difficult to control accurately and accumulate the effect of treatment.

[0003] SUMMARY

[0004] The purpose of the present application is to provide a shockwave balloon dilation catheter with a corona generator, which solves the technical problems of improving the safety, reusability and precise control of the balloon catheter.

[0005] To solve the above problems, the application adopts the following technical scheme: a shock wave balloon dilatation catheter with a corona generator, comprising a dilatation balloon, an outer tube, and an inner tube, the inner tube is arranged in the outer tube and coaxial with the outer tube, the distal end of the inner tube extends out of the distal end of the outer tube, the proximal end of the dilatation balloon is sealingly connected with the distal end of the outer tube, the distal end of the dilatation balloon is sealingly connected with the distal end of the inner tube, the dilatation balloon is provided with a corona generator, the corona generator comprises at least one group of electrodes, each group of electrodes comprises at least one first electrode connected with a positive electrode lead and at least one second electrode connected with a negative electrode lead, the first electrode and the second electrode in each group of electrodes are arranged at intervals, the first electrode and the second electrode are provided with a discharge area in contact with an electrolyte liquid filled in the cavity of the dilatation balloon, so as to form an electric field between the first electrode and the second electrode, and the first electrode and the second electrode are fixed on the inner tube.

[0006] Further, the positive electrode lead and the negative electrode lead are provided with exposed areas connected with the first electrode and the second electrode, the exposed areas are sleeved with metal electrode sleeves, and the metal electrode sleeves are connected and fixed with the first electrode and the second electrode.

[0007] Further, the first electrode and the second electrode are annular, 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.

[0008] Further, the outer walls of the first electrode and the second electrode are respectively provided with first insulation layers and second insulation layers at positions other than the discharge areas, so as to expose the discharge areas.

[0009] Further, the first electrode is provided with at least one first through hole, the second electrode is provided with at least one second through hole, the first through hole and the second through hole respectively constitute the discharge area, the first insulation layer completely covers positions other than the first through hole of the first electrode, and the second insulation layer completely covers positions other than the second through hole of the second electrode, so as to form a directional electric field between the first electrode and the second electrode.

[0010] Further, the opposite annular edges of the first electrode and the second electrode form the discharge area, the first insulation layer completely covers positions other than the annular edges of the first through hole, and the second insulation layer completely covers positions other than the annular edges of the second electrode, so as to form a directional electric field between the first electrode and the second electrode.

[0011] Further, the opposite annular edges of the first electrode and the second electrode form the discharge area, the first insulation layer completely covers positions other than the annular edges of the first through hole, and the second insulation layer completely covers positions other than the annular edges of the second electrode, so as to form a directional electric field between the first electrode and the second electrode.

[0012] Further, the electrode group is provided with one group including one first electrode and one second electrode.

[0013] Further, the electrode group is provided with one group including one first electrode and one second electrode.

[0014] Further, the electrode group is provided with one group including one first electrode and one second electrode.

[0015] Compared with the prior art, the present application realizes that the corona generator receives the pulse electric signal sent by the power pulse generator, the electrolyte liquid generates corona reaction under the action of the pulse electric signal, the electrolyte liquid generates molecular ionization, the vapor bubble generated by the molecular ionization extrudes the electrolyte liquid to increase the pressure in the expansion balloon, and drives the expansion balloon to expand radially along the inner tube. Therefore, the safety, easy operation, reusability and precise control of the balloon catheter can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a structural schematic view of the shock wave balloon expansion catheter of the present application.

[0017] Fig. 2 is a sectional view in the direction of A-A in Fig. 1.

[0018] Fig. 3 is a sectional view in the direction of B-B in Fig. 1.

[0019] Fig. 4 is a structural schematic view of the electrode group of the present application.

[0020] Fig. 5 is a structural schematic view of the electrode group of the present application.

[0021] Fig. 6 is a schematic view of the electric field of the first electrode group of the present application.

[0022] Fig. 7 is a schematic view of the electric field of the second electrode group of the present application.

[0023] Fig. 8 is a schematic view of the electric field of the third electrode group of the present application.

[0024] Fig. 9 is a schematic view of the electric field of the fourth electrode group of the present application.

[0025] Fig. 10 is a schematic view of the vapor bubble generated after the electrode group of the present application.

[0026] Fig. 11 is a view of the relationship between the discharge area and the current size of the present application.

[0027] Fig. 12 is a view of the relationship between the electron passing path and the current size of the present application.

[0028] Fig. 13 is a structural schematic view of the present application when two electrodes are used.

[0029] Fig. 14 is a schematic diagram of the circuit when two electrodes are used in the present application.

[0030] Fig. 15 is a schematic diagram of the structure when three electrodes are used in the present application.

[0031] Fig. 16 is a schematic diagram of the circuit when three electrodes are used in the present application.

[0032] Fig. 17 is a schematic diagram of the structure when two groups of electrodes are used in the present application.

[0033] Fig. 18 is a schematic diagram of the circuit when two groups of electrodes are used in the present application. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in conjunction with the accompanying drawings and examples.

[0035] In the present application, the distal end refers to the end far from the operator, and the proximal end refers to the end close to the operator.

[0036] As shown in Figs. 1 to 3, the present application discloses a shock balloon dilation catheter with a corona generator, comprising a dilation balloon 6, an outer tube 7, and an inner tube 8, wherein the inner tube 8 is arranged coaxially in the outer tube 7, 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 electrolyte liquid is formed between the inner tube 8 and the outer tube 7, the distal end of the inner tube 8 extends out of the distal end of the outer tube 7, the proximal end of the dilation balloon 6 is sealingly connected to the distal end of the outer tube 7, the distal end of the dilation balloon 6 is sealingly connected to the distal end of the inner tube 7, the inner cavity of the dilation balloon 6 is in communication with the liquid passage, the dilation balloon 6 is provided with a corona generator, the corona generator comprises at least one group of electrodes 1, each group of electrodes 1 comprises at least one first electrode 11 connected to a positive lead and at least one second electrode 12 connected to a negative lead, the positive lead and the negative lead are respectively electrically connected to an existing power pulse generator 9 through an electrical connector, the first electrode 11 and the second electrode 12 are provided with a discharge area 13 in contact with the electrolyte liquid filled in the cavity of the dilation balloon 6, so that an electric field is formed between the first electrode 11 and the second electrode 12, the corona generator receives a pulse electric signal sent by the power pulse generator 9, and under the action of the pulse electric signal, the electrolyte liquid undergoes corona reaction through corona discharge of the discharge area 13, the electrolyte liquid is molecularly ionized, and the vapor bubbles generated by the molecular ionization are formed at the position of the discharge area 13 and press the electrolyte liquid to increase the pressure in the dilation balloon 6, which drives the dilation balloon 6 to expand radially along the inner tube 8, and the first electrode 11 and the second electrode 12 are fixed on the inner tube 8 by pasting or welding.

[0037] As shown in Fig. 1, a PET heat shrink tube 2 can be sleeved between the inner tube 8 and the lead to fix the lead on the inner tube 8. Of course, the inner tube 8 and the lead can also be integrally formed in a co-extrusion manner.

[0038] The corona generator is placed in the electrolyte liquid; the corona generator generates corona reaction of the electrolyte liquid by receiving the pulse electric signal sent by the power pulse generator 9, so that the liquid generates molecular ionization; the plasma high temperature vaporization of the molecular ionization generates steam bubbles; as the ionization reaction continues, the steam bubble volume continuously expands and extrudes the surrounding liquid environment, due to the characteristics of the liquid that cannot be extruded, the internal pressure of the expanding balloon 6 is forced to increase instantaneously, driving the expanding balloon 6 to expand radially (as shown in FIG. 10), until the ionization reaction ends and the expanding balloon restores; the time of the ionization reaction is determined by the set pulse signal duration pulse width parameter.

[0039] As shown in FIGS. 3-5, exposed areas connected with the first electrode 11 and the second electrode 12 are provided on the positive and negative electrode wires, and the remaining areas of the positive and negative electrode wires are all wrapped with an insulating layer. The positive and negative electrode wires can be wrapped with a metal electrode sleeve 3 along the inner tube exposed area. The metal electrode sleeve 3 is flat and is connected and fixed with the exposed area by pasting or pressing, so that the metal electrode sleeve 3 is tightly connected with the exposed area. The metal electrode sleeve 3 is connected and fixed with the first electrode 11 and the second electrode 12 by welding.

[0040] As shown in FIGS. 4 and 5, the first electrode 11 and the second electrode 12 are annular, specifically circular annular. FIGS. 4 and 5 take the first electrode 11 as an example. A groove 14 is opened on the inner wall edge of the first electrode 11 and the second electrode 12. 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 capable of being welded with the metal electrode sleeve 3 on the first electrode 11 and the second electrode 12, as shown by the position of "X" in FIGS. 4 and 5. The metal electrode sleeve 3 is connected with the first electrode 11 and the second electrode 12.

[0041] In the present application, as shown in FIGS. 2 and 3, the outer wall of the first electrode 11 and the second electrode 12 is provided with a first insulating layer 4 and a second insulating layer 5 respectively at positions other than the discharge area 13, so as to expose the discharge area 13 and insulate the remaining positions, so that the electrodes receive the pulse electric signal sent by the power pulse generator 9 and form a directional electric field between the electrodes.

[0042] As the first electrode group structure of the present application, as shown in Fig. 6, at least one first through hole 111 is provided on the first electrode 11, and at least one second through hole 121 is provided on the second electrode 12, the first through hole 111 and the second through hole 121 respectively form the discharge area 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 receive the pulse electric signal transmitted by the power pulse generator 9 at the first electrode 11 and the second electrode 12, form a directional electric field between the electrodes, and make the electrolyte liquid produce corona reaction under the action of the pulse electric signal. The potential distribution direction of the electrode group structure is relatively concentrated, which is beneficial to reduce the heating phenomenon, the electron passing path is relatively concentrated, the electric resistance is relatively large, the current is reduced, the safety is increased, the internal steady state symmetrical pressure of the balloon is facilitated, and the whole expanded balloon is uniformly expanded.

[0043] The first insulating layer 4 and the second insulating layer 5 can reduce the contact area of the first electrode 11 and the second electrode 12 with the electrolyte liquid, and release the electric charge in the controlled discharge area 13.

[0044] As a preferred embodiment of the present application, the first through hole 111 is symmetrically arranged on the first electrode 11, 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 arranged one by one in correspondence, and the metal electrode sleeve can be arranged at any position of the inner ring wall of the first electrode 11 and the second electrode 12.

[0045] In the present 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 4-8 mm.

[0046] As can be seen from Fig. 6, the electric field formed in the present embodiment is formed between the two through holes opposite to each other from the second through hole 121 of the second electrode 12 to the first through hole 111 of the first electrode 11, and the electrolyte liquid produces corona reaction under the action of the pulse electric signal.

[0047] When the first electrode group forms the electric field, the steam bubbles generated are distributed at the positions of the first through hole 111 and the second through hole 121.

[0048] As the second electrode group structure of the present application, as shown in Fig. 7, the first insulating layer 4 and the second insulating layer 5 are not wrapped outside the first electrode 11 and the second electrode 12, so as to realize the all-around electric field. Fig. 7 simulates the process of corona discharge from the second electrode 12 to the first electrode 11, and the electric field has divergence and wider range.

[0049] When the second electrode group forms the electric field, the generated steam bubbles are uniformly distributed around the periphery of the first electrode 11 and the second electrode 12.

[0050] The second electrode group structure can release the electric charges to the outside with the maximum area, form a larger current and steam bubbles, and the electric charge distribution is more dispersed. Under the same excitation condition, the pulse energy is larger, the bubble expansion volume is larger, the balloon inside applies a larger pressure to the outside, the expansion force is stronger, and it is suitable for thicker and stubborn calcification.

[0051] As the third electrode group structure of the present application, as shown in FIG. 8, the opposite end annular edges of the first electrode 11 and the second electrode 12 form the discharge area 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 the electric field between the opposite sides of the first electrode 11 and the second electrode 12.

[0052] As shown in FIG. 8, since the discharge area 13 is a circular ring, it will form an electric field in the circumferential direction.

[0053] When the third electrode group forms the electric field, the generated steam bubbles are around the annular edges of the opposite sides of the two electrodes.

[0054] The potential direction path of the third electrode group structure is the shortest, which can make the steam bubbles generated between the first electrode 11 and the second electrode 12, and the steam bubbles are the largest at the midpoint of the first electrode 11 and the second electrode 12. The generated force is conducted outward between the first electrode 11 and the second electrode 12, and a larger expansion force is generated outwardly between the first electrode 11 and the second electrode 12.

[0055] As the fourth electrode group structure of the present application, as shown in FIG. 9, the opposite end annular edges of the first electrode 11 and the second electrode 12 form the discharge area 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 the electric field between the opposite sides of the first electrode 11 and the second electrode 12.

[0056] As shown in FIG. 9, since the discharge area 13 is located at a position far away from the first electrode 11 and the second electrode 12, the directional electric field formed thereby is farther than the directional electric fields of the first and third electrode group structures.

[0057] In the fourth electrode group, the generated steam bubbles are generated around the annular edges of the two electrodes facing away from each other. The potential direction path of the fourth electrode group structure is the farthest, and the generated force moves from the expanding balloon boundary to the center direction. The expanding balloon expands outward preferentially from the proximal end and the distal end. This discharge mode can reduce the local concentration of the electric field, make the electric field around the balloon more balanced, and is conducive to more stable energy transmission. At the same time, the preferential expansion of the balloon on both sides can make the balloon expand more uniformly, reduce the phenomenon of uneven local expansion of the balloon, and help the balloon maintain a good shape and stability during the expansion process.

[0058] In the present application, the electrode group is made of high-temperature-resistant materials such as 304 stainless steel, 316 stainless steel or tungsten-containing alloy. Under the condition of excellent electrical conductivity, the material can withstand the high-temperature plasma corrosion generated during corona discharge. The electrode group is arranged at a distance to prevent arcing between electrodes and cause breakdown discharge. The distance needs to be filled with electrolyte liquid to form a conductive path environment. Under certain parameters, the longer the distance, the greater the resistance of the conduction path, and the smaller the current formed by the path.

[0059] Figure 10 shows the bubbles generated by the corona discharge of the first electrode group structure, which are concentrated in the first through hole 111 of the first electrode 11 and the second through hole 121 of the second electrode 12. With the continuous process of electrode energization, the steam bubble will continue to grow until it pushes the expanding balloon 6 to expand, thereby completing the treatment.

[0060] As shown in Figures 11 and 12, among the four electrode group structures described above, the first is defined as A, the second is defined as B, the third is defined as C, and the fourth is defined as D. As can be seen from the figures, in the first electrode group structure, the discharge area is 0.002mm 2 , the electron passing path length is 4.6mm, and the current value is 7A. In the second electrode group structure, the total area of the discharge area is 0.23mm 2 , and the current value is 20A. In the third electrode group structure, the discharge area is 0.132mm 2 , the electron passing path length is 4mm, and the current value is about 15A. In the fourth electrode group structure, the discharge area is 0.132mm 2 , the electron passing path length is 9.2mm, and the current value is 10A.

[0061] As shown in FIG. 13 and FIG. 14, when the corona generator comprises a set of electrode groups, the electrode groups comprise a first electrode 11 and a second electrode 12, the first electrode 11 is connected to the positive pole of the power pulse generator 9, the second electrode 12 is connected to the negative pole of the power pulse generator 9, the two electrodes receive the pulsed electric signal sent by the power pulse generator 9, and an electric field is formed between the discharge areas of the two electrodes, so that the electrolyte liquid undergoes a corona reaction under the action of the pulsed electric signal.

[0062] As shown in FIG. 15 and FIG. 16, when the corona generator comprises a set of electrode groups, the electrode groups comprise two first electrodes 11 and a second electrode 12, the second electrode 12 is arranged between the two first electrodes 11 and has 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 pulsed electric signal sent by the power pulse generator 9, and an electric field is formed between the discharge areas of the two electrodes, so that the electrolyte liquid undergoes a corona reaction under the action of the pulsed electric signal.

[0063] As shown in FIG. 17 and FIG. 18, when the corona generator comprises two sets of electrode groups, one set of electrode groups comprises two first electrodes 11 and a second electrode 12, and the other set of electrode groups comprises a first electrode 11 and a second electrode 12: the second electrode 12 in the set of electrode groups with three electrodes is arranged between the two first electrodes 11, and the electrodes of the two sets of 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 sets of electrode groups 1 receive the pulsed electric signal sent by the power pulse generator 4, and an electric field is formed between the electrodes, so that the electrolyte liquid undergoes a corona reaction under the action of the pulsed electric signal; preferably, the first electrodes 11 and the second electrodes 12 in the two sets of electrode groups are staggered.

[0064] As shown in FIG. 14, FIG. 16 and FIG. 17, one end of the capacitor C in the power pulse generator 9 is electrically connected to the IGBT (Insulated Gate Bipolar Transistor), 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, the relay group K is electrically connected to the first electrode 11 as the positive pole; 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.

[0065] The capacitor C stores high voltage charge, the first resistor R1 and the second resistor R2 are respectively working loads at two ends of the relay group K, and the protection circuit is safe; when the high voltage charge needs to be released to the electrode, the circuit is opened through the cooperation of the IGBT (Insulated Gate Bipolar Transistor) and the relay group K, when one of the relay group K is closed, the IGBT is turned on, the high voltage charge stored in the capacitor C is released through the communication circuit to form a high voltage pulse; when the corona needs to be generated between multiple electrodes at the same time or in sequence, multiple energy storage capacitors and multiple relays are cooperated with the management circuit to open.

[0066] The power pulse generator 9 can set the voltage value (1000-8000V) in the circuit and the time pulse width value (1-200us) of the released charge.

[0067] The application can be used for treating vascular stenosis and calcified lesions. When used, under the guidance of imaging, the shock balloon dilation catheter (balloon dilation catheter) is introduced to the target site, i.e. the target blood vessel segment, through a guide wire; in the state that the dilation balloon 6 is not filled with electrolyte solution, the balloon dilation catheter can smoothly pass through the stenosis and calcification area; when the balloon dilation catheter reaches the target position, the dilation balloon 6 is filled with electrolyte liquid to a preset pressure through the catheter system (catheter) to make it adhere to the blood vessel wall, ensure that the dilation balloon 6 is in full contact with the lesion area, and apply pulse high pressure, as shown in FIG. 10, so that the corona generator generates corona discharge, the corona discharge phenomenon makes the electrolyte liquid produce steam bubbles, extrudes the electrolyte liquid, and continuously increases the pressure in the dilation balloon 6, and then transmits the pressure to the target site to break the calcified material and expand the blood vessel lumen; according to the degree of lesion and treatment needs, multiple corona discharges can be performed to ensure that the lesion site is completely removed, and after each discharge, the dilation balloon 6 can slightly drain the liquid to change its diameter, adjust the position of the balloon dilation catheter to cover the entire lesion area, drain the internal liquid after the treatment is completed, withdraw the dilation balloon 6, and withdraw the balloon dilation catheter from the body, and perform imaging examination after the operation to confirm the patency of the blood vessel, thereby achieving good treatment effect; the scheme can effectively crush the calcium in the calcified lesion in the blood vessel through controllable balloon instantaneous radial expansion, and prepare for subsequent treatment of the blood vessel. Since it is an arc discharge process, the high temperature in the arc area will diffuse to the surrounding tissue, causing unnecessary thermal damage, and the present application adopts corona discharge, which significantly improves the effectiveness, safety, ease of operation, repeatability and precise controllability in the process of calcified blood vessel intervention treatment.

Claims

1. Shockwave balloon dilation catheter with corona generator, comprising a dilation balloon (6), an outer tube (7), an inner tube (8), the inner tube (8) being arranged within the outer tube (7) and both being coaxial, the distal end of the inner tube (8) protruding beyond the distal end of the outer tube (7), the proximal end of the dilation balloon (6) being sealingly connected to the distal end of the outer tube (7), the distal end of the dilation balloon (6) being sealingly connected to the distal end of the inner tube (7), characterized in that: The corona generator is arranged in the expanding balloon (6), and comprises 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) being arranged at intervals, and the first electrode (11) and the second electrode (12) being provided with discharge areas (13) in contact with electrolyte liquid filled in the cavity of the expanding balloon (6), so as to form an electric field between the first electrode (11) and the second electrode (12), and the first electrode (11) and the second electrode (12) being fixed on the inner tube (8).

2. The shockwave balloon dilation catheter with a corona generator of claim 1, wherein: The positive electrode wire and the negative electrode wire are provided with exposed areas connected to the first electrode (11) and the second electrode (12), and the exposed areas are sleeved with metal electrode sleeves (3) connected to the first electrode (11) and the second electrode (12).

3. The shockwave balloon dilation catheter with a corona generator of claim 2, wherein: 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 sleeves (3) are fixed on the grooves (14).

4. The shockwave balloon dilation catheter with a corona generator of claim 3, wherein: The outer walls of the first electrode (11) and the second electrode (12) are respectively provided with first insulating layers (4) and second insulating layers (5) at positions other than the discharge areas (13), so as to expose the discharge areas (13).

5. The shockwave balloon dilation catheter with a corona generator of claim 4, wherein: 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 the discharge area (13), the first insulating layer (4) completely covers positions of the first electrode (11) other than the first through hole (111), and the second insulating layer (5) completely covers positions of the second electrode (12) other than the second through hole (121), so as to form a directional electric field between the first electrode (11) and the second electrode (12).

6. The shockwave balloon dilation catheter with a corona generator of claim 4, wherein: The annular edges of the first electrode (11) and the second electrode (12) at opposite ends form the discharge area (13), the first insulating layer (4) completely covers positions of the first electrode (11) other than the annular edge, and the second insulating layer (5) completely covers positions of the second electrode (12) other than the annular edge, so as to form a directional electric field between the first electrode (11) and the second electrode (12).

7. The shockwave balloon dilation catheter with a corona generator of claim 4, wherein: The annular edges of the first electrode (11) and the second electrode (12) at opposite ends form the discharge area (13), the first insulating layer (4) completely covers positions of the first electrode (11) other than the annular edge, and the second insulating layer (5) completely covers positions of the second electrode (12) other than the annular edge, so as to form a directional electric field between the first electrode (11) and the second electrode (12).

8. The shockwave balloon dilation catheter with a corona generator of any of claims 1-7, wherein: The electrode group (1) comprises one group, and comprises one first electrode (11) and one second electrode (12).

9. The shockwave balloon dilation catheter with a corona generator of any of claims 1-7, wherein: The electrode group (1) is provided with a group comprising two first electrodes (11) and one second electrode (12), the second electrode (12) being arranged between the two first electrodes (11).

10. The shockwave balloon dilation catheter with a corona generator of any one of claims 1-7, wherein: The electrode group (1) is provided with two groups, one of which comprises two first electrodes (11) and one second electrode (12), and the other of which comprises one first electrode (11) and one second electrode (12).

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