Shockwave balloon catheter with external guide wire

Abstract

Disclosed in the present invention is a guide wire external shockwave balloon catheter, comprising a balloon, a catheter, and a guide wire. The catheter comprises an inner support rod for supporting the balloon and being deformable, and an outer tube. The inner support rod is arranged in the outer tube and is coaxial with the outer tube. A space is provided between the outer tube and the inner support rod, and an inner cavity of the balloon is in communication with the space, so as to facilitate introducing an electrolyte solution. The distal end of the inner support rod extends out from the distal end of the outer tube, and the proximal end of the balloon is in hermetic connection with the distal end of the outer tube. The distal end of the balloon is provided with a balloon tip, and the balloon is in hermetic connection with the distal end of the inner support rod via the balloon tip. A corona generator is arranged on the portion of the inner support rod in the balloon. An inlet in communication with a guide wire hole is provided on the balloon tip. Compared with the prior art, by providing an external guide wire arranged on the balloon tip, the present invention achieves a more concentrated stress on the inner wall of the blood vessel and allows the guide wire to serve as a cutting guide wire while the balloon is guided to the lesion through the blood vessel.

Description

Guide wire external type shock wave balloon catheter TECHNICAL FIELD

[0001] The present application relates to a medical device, in particular to a guide wire external type shock wave balloon catheter based on liquid corona discharge. BACKGROUND

[0002] In the field of medical devices, balloon catheters are mainly used for expanding 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 blood vessel tissue is large, which may lead to blood vessel injury or other complications. The high-energy shock wave of electric arc discharge may cause high-risk complications such as blood vessel rupture and thrombosis. 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 effects, and the existing technology mainly relies on the water hammer effect of the balloon expansion to break up the calcification. Because the balloon is generally a thin film made of high-molecular material with soft hardness, and the guide wire is placed in the inner tube of the balloon, which may cause the balloon to have a larger outer diameter, enter the calcified part of the blood vessel, and the current after excitation is small, so the expansion force may be insufficient. In the process of clinical treatment, the ability of the catheter to break up calcification may be insufficient.

[0003] SUMMARY

[0004] The purpose of the present application is to provide a guide wire external type shock wave balloon catheter, and the technical problem to be solved is to reduce the overall through outer diameter of the balloon catheter, and to make the external guide wire produce stress concentration effect, improve the pulse energy, and at the same time realize the cutting effect of the guide wire.

[0005] To solve the above problems, the application adopts the following technical scheme: a guide wire external shock wave balloon catheter, comprising a balloon, a catheter, and a guide wire, the catheter comprises an inner support rod for supporting the balloon and being deformable, and an outer tube, the inner support rod is arranged in the outer tube coaxially, a gap is arranged between the outer tube and the inner support rod, the inner cavity of the balloon is communicated with the gap to pass in electrolyte liquid, the distal end of the inner support rod extends from the distal end of the outer tube, the proximal end of the balloon is sealingly connected with the distal end of the outer tube, the distal end of the balloon is provided with a balloon tip, the balloon is sealingly connected with the distal end of the inner support rod through the balloon tip, a corona generator is arranged at the position of the inner support rod in the balloon to realize corona discharge of the electrolyte liquid in the balloon to produce steam bubbles to expand the balloon, a guide wire hole penetrating through the distal end of the balloon tip is arranged at the distal end of the balloon tip, the guide wire hole is not communicated with the cavity of the balloon, an entrance is arranged on the balloon tip and communicated with the guide wire hole to extend the guide wire into the guide wire hole through the entrance and then extend from the distal end of the balloon tip, so that the guide wire is partially external to the balloon and the catheter, the guide wire is used for guiding the balloon, and after the electrolyte liquid is subjected to corona reaction, the guide wire is used as a cutting guide wire to assist in cutting the lesion site.

[0006] Further, the diameter of the inner support rod is less than or equal to the diameter of the entrance and the guide wire hole.

[0007] Further, the corona generator comprises at least one group of electrodes, the group of electrodes is provided with a discharge area, 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 the group of electrodes are arranged at intervals, the first electrode and the second electrode are provided with a discharge area in contact with the electrolyte liquid filled in the cavity of the balloon 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 support rod.

[0008] 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.

[0009] Further, the first electrode and the second electrode are annular, grooves are opened on the inner wall edges of the first electrode and the second electrode, and the metal electrode sleeves are fixed on the grooves.

[0010] Further, the outer walls of the first electrode and the second electrode are respectively provided with a first insulating layer and a second insulating layer at positions other than the discharge area to expose the discharge area.

[0011] Further, the first electrode is provided with at least one first through hole, and the second electrode is provided with at least one second through hole, the first through hole and the second through hole respectively form a discharge area, the first insulating layer completely covers other positions of the first electrode except the first through hole, and the second insulating layer completely covers 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.

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

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

[0014] Further, the electrode group is provided with two groups, one of which includes two first electrodes and a second electrode, and the other of which includes a first electrode and a second electrode.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. By arranging an external guide wire on the balloon tip, the guide wire can be guided into the blood vessel and reach the lesion site, and the guide wire can receive the pulse electric signal sent by the corona generator power supply pulse generator, so that the electrolyte liquid generates a corona reaction under the action of the pulse electric signal, the electrolyte liquid generates molecular ionization, and the vapor bubble generated by the molecular ionization extrudes the electrolyte liquid to increase the pressure in the balloon, drive the balloon to expand radially along the inner tube to make the guide wire adhere to the blood vessel wall, make the stress of the guide wire on the inner wall of the blood vessel more concentrated, and realize the function of the guide wire as a cutting guide wire.

[0017] 2. At the same time, the external guide wire can increase the accommodation space of the electrolyte in the balloon, thereby reducing the resistance value in the balloon, increasing the pulse current, increasing the vapor bubble, and enhancing the external expansion force.

[0018] 3. The present application also reduces the overall through diameter of the balloon, and the through diameter of the balloon in the folded state is mainly determined by the outer diameter of the inner support tube. Since the inner support rod does not have a guide wire through hole, the outer diameter of the inner support tube can be reduced to more than 1 / 2 of the inner tube of the general balloon in the prior art, so that the balloon can reach a more distal end of the blood vessel lesion. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structural schematic view of the present application.

[0020] Fig. 2 is a sectional view in the direction of A-A in Fig. 1.

[0021] Fig. 3 is a sectional view in the direction of B-B in Fig. 1.

[0022] Fig. 4 is a partial enlarged view of the mark C in Fig. 1.

[0023] Fig. 5 is a structural schematic diagram of the electrode set of the present application.

[0024] Fig. 6 is a structural schematic diagram of the electrode set of the present application.

[0025] Fig. 7 is an electric field schematic diagram of the electrode set of the present application.

[0026] Fig. 8 is a structural schematic diagram of the two electrodes of the present application.

[0027] Fig. 9 is a circuit schematic diagram of the two electrodes of the present application.

[0028] Fig. 10 is a structural schematic diagram of the three electrodes of the present application.

[0029] Fig. 11 is a circuit schematic diagram of the three electrodes of the present application.

[0030] Fig. 12 is a structural schematic diagram of the two electrode sets of the present application.

[0031] Fig. 13 is a circuit schematic diagram of the two electrode sets of the present application.

[0032] Fig. 14 is a schematic diagram of the present application in the blood vessel.

[0033] Fig. 15 is a schematic diagram of the present application after corona discharge.

[0034] Fig. 16 is a schematic diagram of the present application in which the guide wire crushes the lesion. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with the accompanying drawings and examples.

[0036] In the present application, the distal end refers to the end far from the operator; the proximal end refers to the end close to the operator.

[0037] As shown in Figs. 1 to 4, the present application discloses a guide wire external type shock wave balloon catheter, comprising an expandable balloon 1, a catheter 2, and a guide wire 3, wherein:

[0038] The catheter 2 comprises an inner support rod 21 with elastic deformability for supporting the balloon 1 and an outer tube 22, the inner support rod 21 is arranged in the outer tube 2 coaxially, a gap is arranged between the outer tube 22 and the inner support rod 21, the inner cavity of the balloon 1 is communicated with the gap to pass in the electrolyte liquid, and the distal end of the inner support rod 21 extends out of the distal end of the outer tube 22;

[0039] The proximal end of the balloon 1 is sealingly connected with the distal end of the outer tube 22, the distal end of the balloon 1 is provided with a balloon tip 5, and the balloon 1 is sealingly connected with the distal end of the inner support rod 21 through the balloon tip 5;

[0040] The inner support rod 21 is provided with a corona generator at the position of the balloon 1 to realize the corona reaction of the electrolyte liquid in the balloon 1 through corona discharge, generate steam bubbles to expand the balloon 1, and the distal end of the balloon tip 5 is provided with a guide wire hole 7 penetrating the distal end of the balloon tip 5, the guide wire hole 7 does not communicate with the cavity of the balloon 1, and the balloon tip 5 is provided with an access port 6 communicating with the guide wire hole 7.

[0041] After the guide wire 3 extends into the guide wire hole 7 through the access port 6, the guide wire 3 extends out of the distal end of the balloon tip 5, so that part of the guide wire 3 is externally arranged outside the balloon 1 and the catheter 2, and the guide wire 3 is used to guide the balloon 1 and cut the lesion part after the electrolyte liquid is subjected to the corona reaction. Since the externally arranged guide wire has a certain hardness and toughness, the hardness can cut the calcified tissue to a certain extent, and the toughness ensures that the guide wire will not be easily broken when the cutting force is applied. After the guide wire is sent to the lesion part, the guide wire can accurately transmit the mechanical force generated after the pulse to the cut tissue, and the operator controls the pushing and rotating actions of the guide wire to make the guide wire and the calcified tissue produce relative movement, thereby realizing the cutting effect.

[0042] In the present application, the inner support rod 21 can be a solid circular rod or a circular rod with a hole, and is made of a high polymer material such as Nylon, PI (polyimide), and Pebax (polyether block polyamide).

[0043] The diameter of the inner support rod 21 is less than or equal to the diameter of the access port 6 and the guide wire hole 7.

[0044] In the present application, the corona generator can be realized by the following structure, as shown in Figures 1 to 3. The corona generator includes at least one group of electrodes 9, each group of electrodes 9 includes at least one first electrode 91 connected to a positive electrode wire and at least one second electrode 92 connected to a negative electrode wire, the positive electrode wire and the negative electrode wire are respectively connected to the existing power pulse generator 4 through an electrical connector, the first electrode 91 and the second electrode 92 in the electrode group 9 are arranged at intervals, and the first electrode 91 and the second electrode 92 are provided with a discharge area 96 in contact with the electrolyte liquid filled in the cavity of the balloon 1, so as to form an electric field between the first electrode 91 and the second electrode 92. The corona generator receives the pulse electric signal sent by the power pulse generator 4, and generates a corona reaction of the electrolyte liquid through the discharge area 96 under the action of the pulse electric signal, the electrolyte liquid generates molecular ionization, the steam bubbles generated by the molecular ionization form at the position of the discharge area 96, and press the electrolyte liquid to increase the pressure in the balloon 1, drive the balloon 1 to expand along the inner support rod 21 in the radial direction, and the first electrode 91 and the second electrode 92 are fixed on the inner support rod 21 by pasting or welding.

[0045] As shown in Fig. 1, the inner support rod 21 can be sleeved with a PET heat shrink tube 23 between the inner support rod 21 and the wire, so as to fix the wire on the inner support rod 21, and of course, the inner support rod 21 and the wire can also be integrally formed in a co-extrusion manner.

[0046] The corona generator is placed in the electrolyte liquid during use, and the corona generator generates a corona reaction of the electrolyte liquid by receiving the pulse electric signal sent by the power pulse generator 4, so that the liquid is molecularly ionized; the plasma high temperature vaporization of the molecular ionization generates a steam bubble; as the ionization reaction continues, the steam bubble volume continuously expands and extrudes the surrounding liquid environment, due to the characteristics that the liquid cannot be extruded, the internal pressure of the balloon 1 is instantaneously increased, driving the balloon 1 to expand radially (as shown in Fig. 11), until the ionization reaction ends and the expanded balloon recovers; the time of the ionization reaction is determined by the set pulse signal duration pulse width parameter.

[0047] As shown in Figs. 2, 3 and 6, 7, exposed areas connected with the first electrode 91 and the second electrode 92 are arranged on the positive and negative electrode wires, and the remaining areas of the positive and negative electrode wires are wrapped with an insulating layer, and the positive and negative electrode wires can be sleeved with a metal electrode sleeve 94 outside the exposed area of the inner tube, the metal electrode sleeve 94 is flat, and is connected and fixed with the exposed area by pasting or pressing, so that the metal electrode sleeve 94 is tightly connected with the exposed area, and the metal electrode sleeve 94 is connected and fixed with the first electrode 91 and the second electrode 92 by welding.

[0048] As shown in Figs. 5 and 6, the first electrode 91 and the second electrode 92 are annular, specifically circular annular, and Figs. 5 and 6 take the first electrode 91 as an example, grooves 95 are arranged on the inner wall edges of the first electrode 91 and the second electrode 92, and the metal electrode sleeve 94 is welded on the grooves 95, specifically, the overall size of the groove 95 can be smaller than the overall size of the metal electrode sleeve 94, so as to form a contact position capable of being welded with the metal electrode sleeve 94 on the first electrode 91 and the second electrode 92, as shown by the position of "X" in Figs. 5 and 6, the metal electrode sleeve 94 is welded with the first electrode 91 and the second electrode 92.

[0049] In the present application, as shown in Figs. 2 and 3, the outer walls of the first electrode 91 and the second electrode 92 are respectively provided with a first insulating layer 912 and a second insulating layer 922 at positions other than the discharge area 96, so as to expose the discharge area 96 and insulate the remaining positions, so that the electrodes receive the pulse electric signal sent by the power pulse generator 4, and a directional electric field is formed between the electrodes.

[0050] As an electrode group structure of the present application, as shown in Fig. 7, at least one first through hole 911 is provided on the first electrode 91, and at least one second through hole 921 is provided on the second electrode 92, the first through hole 911 and the second through hole 921 respectively form a discharge area 96, the first insulating layer 912 completely covers the first electrode 91 except the first through hole 911, and the second insulating layer 922 completely covers the second electrode 92 except the second through hole 921, so as to receive the pulse electric signal sent by the power pulse generator 4 at the first electrode 91 and the second electrode 92, 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 and symmetrical pressure of the balloon is facilitated, and the balloon is uniformly expanded outward. The first insulating layer 912 and the second insulating layer 922 can reduce the contact area of the first electrode 91 and the second electrode 92 with the electrolyte liquid, and release the electric charge in the controlled discharge area 93.

[0051] The first through hole 911 is symmetrically arranged on the first electrode 91, and the second through hole 921 is symmetrically arranged on the second electrode 92, the two first through holes 911 and the two second through holes 921 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 91 and the second electrode 92.

[0052] The interval between the first through hole 911 on the first electrode 91 and the second through hole 921 on the second electrode 92 is 3-8mm.

[0053] As can be seen from Fig. 7, the electric field formed in the embodiment is formed between the two through holes opposite to each other from the second through hole 921 of the second electrode 92 to the first through hole 911 of the first electrode 91, and the electrolyte liquid produces corona reaction under the action of the pulse electric signal.

[0054] When the first electrode group forms the electric field, the steam bubbles generated are distributed at the positions of the first through hole 911 and the second through hole 921.

[0055] In the present application, the electrode group is selected from high-temperature-resistant materials such as 304 stainless steel, 316 stainless steel or tungsten-containing alloy; under the condition of excellent electric conductivity, the material can withstand the high-temperature plasma corrosion generated in the corona discharge process; the electrode group is arranged with a spacing to prevent the generation of electric arc between the electrodes to cause breakdown discharge, and electrolyte liquid needs to be filled between the spacing to form a conductive path environment. Under certain parameters, the longer the spacing, the larger the resistance of the conduction path, and the smaller the formed path current.

[0056] As shown in FIG. 8 and FIG. 9, when the corona generator comprises a set of electrode groups, the electrode group comprises a first electrode 91 and a second electrode 92, the first electrode 91 is connected to the positive pole of the power pulse generator 4, the second electrode 92 is connected to the negative pole of the power pulse generator 4, the two electrodes receive the pulse electric signal sent by the power pulse generator 4, 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 pulse electric signal.

[0057] As shown in FIG. 10 and FIG. 11, when the corona generator comprises a set of electrode groups, the electrode group comprises two first electrodes 91 and a second electrode 92, the second electrode 92 is arranged between the two first electrodes 91 and has equal spacing; wherein the two first electrodes 91 are connected to the positive pole of the power pulse generator 4, and the second electrode 92 is connected to the negative pole of the power pulse generator 4; the two first electrodes 91 and the second electrode 92 receive the pulse electric signal sent by the power pulse generator 4, 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 pulse electric signal.

[0058] As shown in FIG. 12 and FIG. 13, when the corona generator comprises two sets of electrode groups, one of which comprises two first electrodes 91 and a second electrode 92, and the other of which comprises a first electrode 91 and a second electrode 92: the second electrode 92 in the set of electrode groups 9 with three electrodes is arranged between the two first electrodes 91, and the electrodes of the two sets of electrode groups are arranged at equal distances; wherein the three first electrodes 91 are connected to the positive pole of the power pulse generator 4, and the two second electrodes 92 are connected to the negative pole of the power pulse generator 4; the two sets of electrode groups 9 receive the pulse 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 pulse electric signal; preferably, the first electrodes 91 and the second electrodes 92 in the two sets of electrode groups are staggered.

[0059] As shown in FIG. 9, FIG. 11 and FIG. 12, one end of the capacitor C in the power pulse generator 4 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 91 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 92.

[0060] 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 simultaneously or sequentially between multiple electrodes, multiple energy storage capacitors and multiple relays are cooperated with the management circuit to open.

[0061] The power pulse generator 4 can set the voltage value (1000-8000V) and the time pulse width value (1-200us) of the released charge in the circuit.

[0062] The present application can be used for treating vascular stenosis and calcification lesions. When used, under the guidance of imaging, the present application (shock wave balloon catheter) is introduced into the target site, i.e. the target blood vessel segment, through the guide wire 3. In the process of being introduced into the target site, the guide wire 3 does not enter the balloon 1 and the catheter 2 except entering the balloon tip 5 (as shown in FIG. 14). When the balloon 1 reaches the target position, the balloon 1 is filled with electrolyte liquid to a preset pressure through the catheter, so that it adheres to the blood vessel wall 200. At this time, the guide wire 3 is pushed to adhere to the blood vessel wall, ensuring that the balloon 1 is in full contact with the lesion area, and a high pulse pressure is applied to make the corona generator generate corona discharge. The corona discharge phenomenon makes the electrolyte liquid produce steam bubbles 300, extrudes the electrolyte liquid, and continuously increases the pressure in the balloon 1, and then transmits the pressure to the target site and the guide wire 3 (as shown in FIG. 15). The local high stress area generated by stress concentration is beneficial to focusing energy, and the lesion 400 (calcification) is crushed by pushing or rotating (as shown in FIG. 16), thereby improving the efficiency of calcification crushing. Stress concentration also brings a larger local mechanical force, which can cooperate with the corona generating device 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. After each discharge, the balloon 1 can be slightly drained to change its diameter, adjust the position of the balloon expansion catheter to cover the entire lesion area, drain the internal liquid after treatment, withdraw the balloon 1, and withdraw the balloon expansion catheter from the body. After the operation, imaging examination is performed 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 instantaneous radial expansion of the balloon, and prepare for subsequent treatment of the blood vessel.

[0063] The beneficial effects of the present application are as follows:

[0064] 1、The high temperature of the arc region in the arc discharge process in the prior art will spread to the surrounding tissues, causing unnecessary thermal damage, while the present application uses corona discharge, which significantly improves the effectiveness, safety, ease of operation, repeatability and precise control in the process of calcified vessel intervention treatment.

[0065] 2、At the same time, compared with the design of the guide wire inside the catheter, the guide wire is outside during the operation, which is more flexible, the operator can control the guide wire more directly, can control the advance and retreat of the catheter more accurately, and can play a more effective cutting role. When the corona generator generates mechanical stress outward, the guide wire produces stress concentration effect, cooperates with the pulse catheter, and is convenient for breaking more stubborn calcification.

[0066] 3、The guide wire outside also increases the accommodation volume of the electrolyte inside the balloon, increases the current and the vapor bubble, generates greater mechanical stress, thereby generating greater energy, and improves the breaking and cutting ability of stubborn calcification in the process of calcified vessel intervention treatment.

Claims

1. An over-the-wire shock balloon catheter, comprising a balloon (1), a catheter (2), characterized in that: The catheter (2) comprises an inner support rod (21) for supporting the balloon (1) and being deformable, an outer tube (22), the inner support rod (21) is arranged in the outer tube (2) and is coaxial, a gap is arranged between the outer tube (22) and the inner support rod (21), the inner cavity of the balloon (1) is communicated with the gap to pass in the electrolyte liquid, the distal end of the inner support rod (21) extends from the distal end of the outer tube (22), the proximal end of the balloon (1) is sealingly connected with the distal end of the outer tube (22), the distal end of the balloon (1) is provided with a balloon tip (5), the balloon (1) is sealingly connected with the distal end of the inner support rod (21) through the balloon tip (5), a corona generator is arranged at the position of the inner support rod (21) in the balloon (1) to realize that the electrolyte liquid in the balloon (1) is subjected to corona reaction through corona discharge to generate steam bubbles to expand the balloon (1), a guide wire hole (7) penetrating through the distal end of the balloon tip (5) is arranged at the distal end of the balloon tip (5), the guide wire hole (7) is not communicated with the cavity of the balloon (1), an inlet (6) communicated with the guide wire hole (7) is arranged on the balloon tip (5) to extend the guide wire (3) into the guide wire hole (7) through the inlet (6) and then extend the guide wire (3) from the distal end of the balloon tip (5) to partially expose the guide wire (3) outside the balloon (1) and the catheter (2), the guide wire (3) is used for guiding the balloon (1) and assisting in cutting the lesion part after the electrolyte liquid is subjected to corona reaction.

2. The over-the-wire shock balloon catheter of claim 1, wherein: The diameter of the inner support rod (21) is less than or equal to the diameter of the inlet (6) and the guide wire hole (7).

3. The over-the-wire shock balloon catheter of claim 2, wherein: The corona generator comprises at least one group of electrodes (9), the group of electrodes (9) is provided with a discharge area (93), each group of electrodes (9) comprises at least one first electrode (91) connected with a positive electrode wire and at least one second electrode (92) connected with a negative electrode wire, the first electrode (91) and the second electrode (92) in the group of electrodes (9) are arranged at intervals, the first electrode (91) and the second electrode (92) are provided with the discharge area (96) in contact with the electrolyte liquid filled in the cavity of the balloon (1) to form an electric field between the first electrode (91) and the second electrode (92), and the first electrode (91) and the second electrode (92) are fixed on the inner support rod (21).

4. The over-the-wire shock balloon catheter of claim 3, wherein: The positive electrode wire and the negative electrode wire are provided with exposed areas connected with the first electrode (91) and the second electrode (92), the exposed areas are sleeved with metal electrode sleeves (94), and the metal electrode sleeves (94) are connected and fixed with the first electrode (91) and the second electrode (92).

5. The over-the-wire shock balloon catheter of claim 4, wherein: The first electrode (91) and the second electrode (92) are annular, grooves (95) are opened on the inner wall edges of the first electrode (91) and the second electrode (92), and the metal electrode sleeves (94) are fixed on the grooves (95).

6. The over-the-wire shock balloon catheter of claim 5, wherein: The outer walls of the first electrode (91) and the second electrode (92) are respectively provided with first insulation layers (912) and second insulation layers (922) at positions other than the discharge area (96) to expose the discharge area (96).

7. The over-the-wire shock balloon catheter of claim 6, wherein: At least one first through hole (911) is arranged on the first electrode (91), and at least one second through hole (921) is arranged on the second electrode (92), the first through hole (911) and the second through hole (921) respectively form a discharge area (96), a first insulating layer (912) completely covers the first electrode (91) except the first through hole (911), and a second insulating layer (922) completely covers the second electrode (92) except the second through hole (921), so as to form a directional electric field between the first electrode (91) and the second electrode (92).

8. The external wire guide shockwave balloon catheter according to any one of claims 3-7, characterized in that: The electrode group (9) is provided with one group, including a first electrode (91) and a second electrode (92).

9. The external wire guide shockwave balloon catheter according to any one of claims 3-7, characterized in that: The electrode group (9) is provided with one group, including two first electrodes (91) and a second electrode (92), and the second electrode (92) is arranged between the two first electrodes (91).

10. The external wire guide shockwave balloon catheter according to any one of claims 3-7, characterized in that: The electrode group (9) is provided with two groups, one of which includes two first electrodes (91) and a second electrode (92), and the other of which includes a first electrode (91) and a second electrode (92).

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