Shock wave balloon catheter

Abstract

The utility model relates to the technical field of medical instruments, and provides a shock wave balloon catheter which comprises an inner tube and an outer tube. At least one shock wave generating assembly is arranged at the far end of the inner tube and comprises an inner electrode set, an insulating layer and an outer electrode, the inner electrode set comprises a first inner electrode and a second inner electrode, the two inner electrodes are arranged on the outer wall face of the inner tube in a sleeving mode, and a gap is formed between the two inner electrodes; and the injection channel is formed between the insulating layer and the outer electrode by avoiding the two inner electrodes, and the injection channel is communicated with the interval, so that the adhesive insulating medium is conveyed into the interval along the injection channel, and at least the interval is filled with the adhesive insulating medium. The two inner electrodes are insulated and isolated through the bonding insulating medium, so that after the shock wave generating assembly is powered on for use, current passes through a preset discharge channel of the shock wave generating piece, and the use effect of the shock wave generating catheter is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a shock wave balloon catheter. Background Art

[0002] Cardiovascular calcification is a disease that affects people's health and safety, and often occurs in the elderly. Shock wave lithotripsy is a method of destroying calcified lesions based on the electrohydraulic effect. During treatment, the shock wave balloon is pressed against the blood vessel wall with low pressure. The shock wave generating component in the balloon is connected to the pulse power supply through a wire. The shock wave generated by the high voltage is transmitted to the calcified part, softening and lysing the calcified part without damaging the blood vessel, and has a good therapeutic effect.

[0003] In the prior art, when fixing the inner electrode, the outer electrode and the insulating layer, glue is injected into the gaps between the three from both ends, resulting in uneven glue flow in the gaps and the possibility of not being able to fill the gaps, which in turn causes the defect that it is difficult to achieve coaxial assembly and fixation of the electrode and the catheter in the finished product of the balloon catheter. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the shock wave balloon catheter in the prior art that when fixing the inner electrode, the outer electrode and the insulating layer, glue is injected into the gap from both ends of the gap between the three, resulting in uneven flow of glue in the gap and the gap may not be filled, which in turn makes it difficult to achieve the coaxial assembly and fixation of the electrode and the catheter in the finished balloon catheter, thereby providing a shock wave balloon catheter.

[0005] A shock wave balloon catheter comprises: an inner tube, the distal end of which is arranged in a balloon; a shock wave generating assembly, at least one of which is arranged at the distal end of the inner tube, the shock wave generating assembly comprising an inner electrode group, an insulating layer and an outer electrode, wherein the inner electrode group comprises at least one inner electrode, all of which are sleeved on the outer wall surface of the inner tube, the insulating layer is sleeved on the outer wall surface of the inner electrode, the outer electrode is sleeved on the outer wall surface of the insulating layer, and a gap is provided between the outer electrode, the insulating layer and the adjacent wall surfaces of the inner electrode group and the inner tube; an injection channel formed between the insulating layer and the outer electrode, the injection channel being connected to the gap so that an adhesive insulating medium can be transported into the gap along the injection channel and can flow toward the end of the catheter along the gap.

[0006] Optionally, in the above shock wave balloon catheter, a first through hole and a second through hole are respectively provided on the insulating layer and the outer electrode, and the first through hole and the second through hole are suitable for forming the injection channel.

[0007] Optionally, in the above shock wave balloon catheter, the first through hole and the second through hole are coaxially arranged.

[0008] Optionally, in the above-mentioned shock wave balloon catheter, the bonding insulating medium is insulating glue.

[0009] Optionally, in the above shock wave balloon catheter, the insulating glue is epoxy glue or UV glue.

[0010] Optionally, in the above shock wave balloon catheter, at least two shock wave generating assemblies are arranged at the distal end of the inner tube, and the inner electrode group of each shock wave generating assembly includes an inner electrode, and two adjacent inner electrodes are respectively connected to a positive and negative power supply;

[0011] or;

[0012] At least one shock wave generating assembly is arranged at the distal end of the inner tube, and the inner electrode group of each shock wave generating assembly includes two inner electrodes, namely a first inner electrode and a second inner electrode, the first inner electrode and the second inner electrode are arranged at two sides of the injection channel with an interval, and when the adhesive insulating medium is transported into the gap along the injection channel and is suitable for flowing toward the two ends of the catheter along the gap, the adhesive insulating medium is suitable for filling the gap.

[0013] Optionally, in the above shock wave balloon catheter, the cross-sectional area of ​​the first through hole is larger than the cross-sectional area of ​​the second through hole, and the orthographic projection of the second through hole on the inner tube falls within the orthographic projection of the first through hole on the inner tube.

[0014] Optionally, in the above shock wave balloon catheter, the cross-sections of the first through hole and the second through hole are both set to be circular, the two are coaxially arranged, and the inner diameter of the first through hole is larger than the inner diameter of the second through hole.

[0015] Optionally, in the above shock wave balloon catheter, the ratio of the diameter of the second through hole to the diameter of the first through hole is between 0.4-0.8.

[0016] Optionally, in the above-mentioned shock wave balloon catheter, when the inner electrode group includes the first inner electrode and the second inner electrode, first through-holes are respectively opened at positions corresponding to the first inner electrode and the second inner electrode on the outer electrode, and second through-holes are opened on the insulating layer corresponding to the first through-holes, and the corresponding first through-holes and the second through-holes form a discharge channel, so that the shock wave generating component has two discharge channels;

[0017] The first inner electrode is connected to a high-voltage pulse power supply via a first wire, and the second inner electrode is connected to a high-voltage pulse power supply via a second wire. Ends of the first wire and the second wire are respectively arranged in the gap between the first inner electrode and the second inner electrode and the inner tube.

[0018] Optionally, in the above shock wave balloon catheter, the first power through hole and the second power through hole are both circular, and the inner diameter of the first power through hole is larger than the inner diameter of the second power through hole.

[0019] The technical solution of the utility model has the following advantages:

[0020] 1. The utility model provides a shock wave balloon catheter, comprising: an inner tube, the distal end of the inner tube is arranged in a balloon; a shock wave generating assembly, at least one shock wave generating assembly is arranged at the distal end of the inner tube, the shock wave generating assembly comprises an inner electrode group, an insulating layer and an outer electrode, wherein the inner electrode group comprises at least one inner electrode, all of the inner electrodes are sleeved on the outer wall surface of the inner tube, the insulating layer is sleeved on the outer wall surface of the inner electrode, the outer electrode is sleeved on the outer wall surface of the insulating layer, and there is a gap between the outer electrode, the insulating layer and the adjacent wall surfaces of the inner electrode group and the inner tube; an injection channel is formed between the insulating layer and the outer electrode, the injection channel is connected to the gap, so that the bonding insulating medium can be transported into the gap along the injection channel and is suitable for flowing toward the end of the catheter along the gap.

[0021] In the shock wave balloon catheter of this structure, each inner electrode of the inner electrode group of the shock wave generating assembly is sleeved on the outer wall surface of the inner tube, the insulating layer is sleeved on the outer wall surfaces of the two inner electrodes, and then the outer electrode is sleeved on the outer wall surface of the insulating layer, and there is a gap between the outer electrode, the insulating layer, the inner electrode group and the adjacent wall surfaces of the inner tube, and then an injection channel connected to the gap is formed between the insulating layer and the outer electrode, and an adhesive insulating medium is introduced into the gap through the injection channel. The adhesive insulating medium can flow into the gap along the injection channel. When the adhesive insulating medium is injected into the corresponding gap by using the injection channel, the injection area of ​​the injection channel is large, so that the adhesive insulating medium can The invention can fully flow into the gap and flow toward the two ends of the catheter along the gap, ensuring the stable connection and coaxial assembly of the inner electrodes, the insulating layer and the outer electrodes, realizing the effect of the coaxial assembly and fixed installation of the electrodes and the catheter of the finished shock wave generating assembly of the shock wave catheter, and the three will not loosen relative to the inner tube when releasing the shock wave, effectively ensuring the life of the electrode and the discharge effect, overcoming the problem that the glue is injected into the gap from both ends of the gap between the inner electrode, the outer electrode and the insulating layer when fixing the inner electrode, the outer electrode and the insulating layer in the shock wave balloon catheter in the prior art, resulting in uneven glue flow in the gap and the problem that the gap may not be filled, thereby causing the defect that it is difficult to realize the coaxial assembly and fixation of the electrodes and the catheter in the finished balloon catheter.

[0022] 2. In the shock wave balloon catheter provided by the present invention, a first through hole and a second through hole are respectively provided on the insulating layer and the outer electrode, and the first through hole and the second through hole are suitable for forming the injection channel.

[0023] In the shock wave balloon catheter of this structure, a first through hole and a second through hole are respectively opened on the insulating layer and the outer electrode, and an injection channel for the bonding insulating medium to pass into the gap is formed by using the first through hole and the second through hole. This molding method is simple and easy to operate.

[0024] 3. In the shock wave balloon catheter provided by the utility model, at least two shock wave generating assemblies are arranged at the distal end of the inner tube, and the inner electrode group of each shock wave generating assembly includes an inner electrode, and two adjacent inner electrodes are respectively connected to a positive and negative power supply; or; at least one shock wave generating assembly is arranged at the distal end of the inner tube, and the inner electrode group of each shock wave generating assembly includes two inner electrodes, namely a first inner electrode and a second inner electrode, the first inner electrode and the second inner electrode are arranged at both sides of the injection channel at intervals, and in the process that the adhesive insulating medium is transported into the gap along the injection channel and is suitable for flowing toward the two ends of the catheter along the gap, the adhesive insulating medium is suitable for filling the gap.

[0025] In the shock wave balloon catheter of this structure, when the inner electrode group includes two inner electrodes, the two inner electrodes are spaced apart, and discharge may occur between the two inner electrodes. Therefore, in order to avoid discharge between the two inner electrodes, in the process of flowing the adhesive insulating medium into the gap through the injection channel, the gap can also be filled with the adhesive insulating medium. The adhesive insulating medium is used to achieve the effect of insulation and isolation between the two inner electrodes, so that after the shock wave generating component is connected to the power supply and used, the current passes through the preset discharge channel of the shock wave generating component, thereby ensuring the use effect of the shock wave generating catheter, avoiding the generation of current between the two inner electrodes, and further avoiding the discharge phenomenon caused by connecting the two electrodes.

[0026] 4. In the shock wave balloon catheter provided by the present invention, the cross-sectional area of ​​the first through hole is larger than the cross-sectional area of ​​the second through hole, and the orthographic projection of the second through hole on the inner tube falls within the orthographic projection of the first through hole on the inner tube.

[0027] In the shock wave balloon catheter of this structure, the cross-sectional area of ​​the first through hole is set to be larger than the cross-sectional area of ​​the second through hole, and the orthographic projection of the second through hole on the inner tube falls within the orthographic projection of the first through hole on the inner tube, thereby ensuring that the bonding insulating medium can fill the gap first, effectively preventing the bonding insulating medium from exceeding the first through hole of the outer electrode, resulting in the problem of the overall size of the electrode component being too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the overall structure of a balloon catheter provided in the first embodiment of the utility model;

[0030] Figure 2 A schematic diagram of a top view of the structure when the inner electrode group of the shock wave generating assembly includes two inner electrodes;

[0031] Figure 3 for Figure 2 The schematic cross-sectional structure diagram of the shock wave generating assembly when the inner electrode group includes two inner electrodes;

[0032] Figure 4 is a schematic diagram of the structure of one of the inner electrodes of the inner electrode group;

[0033] Figure 5is a schematic diagram of the structure of the insulating layer;

[0034] Figure 6 is a schematic diagram of the structure of the outer electrode;

[0035] Figure 7 A schematic diagram of the structure of an external discharge channel formed by an inner electrode and an outer electrode;

[0036] Figure 8 A schematic diagram of the position structure of the injection channel and the inner electrode when the inner electrode group of the shock wave generating assembly includes one inner electrode;

[0037] Description of reference numerals:

[0038] 100. Balloon;

[0039] 200. Shock wave generating component;

[0040] 201, inner electrode group;

[0041] 2011, first inner electrode; 2012, first wire; 2013, second inner electrode; 2014, second wire; 2015, connecting wire;

[0042] 202, insulating layer; 2021, first through hole; 2022, second electrical through hole;

[0043] 203, external electrode; 2031, second through hole; 2032, first electrical through hole;

[0044] 204, external discharge channel;

[0045] 300, inner tube; 400, outer tube; 500, catheter seat; 600, power supply; 700, injection channel; 800, interval. DETAILED DESCRIPTION

[0046] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] The injection channel avoiding the inner electrode setting in this embodiment is interpreted as the orthographic projection of the injection channel on the inner tube does not fall within the orthographic projection of the inner electrode on the inner tube, and the injection channel not avoiding the inner electrode setting is interpreted as the orthographic projection of the injection channel on the inner tube all falls within the orthographic projection of the inner electrode on the inner tube.

[0051] Example 1

[0052] This embodiment describes a shock wave balloon catheter, see Figure 1-Figure 6 The shock wave balloon catheter in this embodiment includes a balloon 100, a shock wave generating component 200, an inner tube 300, an outer tube 400, a catheter seat 500 and a power supply 600 for providing high-voltage pulses. The inner tube 300 is inserted into the inner cavity of the outer tube 400, the distal end of the outer tube 400 is connected to the proximal end of the balloon 100, the distal end of the inner tube 300 penetrates the balloon 100, the inner tube 300 and the outer tube 400 are fixedly connected to the catheter seat 500, the inner tube 300 penetrates the catheter seat 500, a wire connecting end is provided on the catheter seat 500, one end of the wire is connected to the power supply 600, and the other end passes through the wire connecting end, passes through the cavity between the inner tube 300 and the outer tube 400, and is connected to the shock wave generating component 200, and the shock wave generating assembly is arranged at the distal end of the inner tube 300.

[0053] To elaborate, in this embodiment, a shock wave generating assembly may be provided at the distal end of the inner tube 300, or two or more shock wave generating assemblies may be provided, each shock wave generating assembly includes an inner electrode group 201, an insulating layer 202 and an outer electrode 203, wherein the inner electrode group 201 in each shock wave generating assembly includes at least one inner electrode, all the inner electrodes are sleeved on the outer wall surface of the inner tube 300, the above-mentioned insulating layer 202 is sleeved on the outer wall surface of the corresponding inner electrode, the outer electrode 203 is sleeved on the outer wall surface of the corresponding insulating layer 202, and there is a gap between the adjacent walls of the outer electrode 203, the insulating layer 202, the inner electrode group 201 and the inner tube 300, and then an injection channel 700 is formed between the insulating layer 202 and the outer electrode 203, and the injection channel 700 is connected to the gap, and the injection channel 700 is connected to the gap. The injection channel 700 injects the bonding insulating medium into the gap, and the bonding insulating medium can flow along the gap to the end of the catheter, so as to fill the gaps between the outer electrode 203, the insulating layer 202, the inner electrode group 201 and the adjacent wall surfaces of the inner tube 300. The bonding insulating medium is injected into the corresponding gap by the injection channel 700. Since the injection area of ​​the injection channel 700 is large, the bonding insulating medium can fully flow into the gap and flow along the gap to the two ends of the catheter, ensuring that the inner electrodes, the insulating layer 202 and the outer electrode 203 are stably connected and coaxially assembled, achieving the effect of coaxial assembly and fixed installation of the electrode and the catheter of the finished shock wave generating assembly of the shock wave catheter, and the three will not loosen relative to the inner tube when releasing the shock wave, effectively ensuring the life of the electrode and the discharge effect.

[0054] In the specific molding, see Figure 2 , Figure 3 , Figure 5 and Figure 6 A first through hole 2021 and a second through hole 2031 can be respectively opened on the insulating layer 202 and the outer electrode 203 to avoid the parts corresponding to the two inner electrodes. The first through hole 2021 and the second through hole 2031 are suitable for forming the above-mentioned injection channel 700. The first through hole 2021 and the second through hole 2031 are used to form an injection channel 700 for the bonding insulating medium to pass into the gap. The molding method is simple and easy to operate. In this embodiment, a first through hole 2021 can be opened on a side wall surface at the middle position of the insulating layer 202, and a second through hole 2031 can be opened on the same side wall surface at the middle position of the outer electrode 203.

[0055] Of course, see Figure 7 It is also possible to not avoid the inner electrode and directly open the first through hole 2021 and the second through hole 2031 on the insulating layer 202 and the outer electrode 203 corresponding to the two inner electrodes. The first through hole 2021 and the second through hole 2031 are suitable for forming the above-mentioned injection channel 700.

[0056] The specific positions of the first through hole 2021 and the second through hole 2031 are set accordingly according to the number of inner electrodes provided in the inner electrode group of the actual shock wave generating assembly.

[0057] In actual use, the first through hole 2021 and the second through hole 2031 can be coaxially arranged. This arrangement makes it faster and more convenient to inject the adhesive insulating medium. Of course, without considering the injection efficiency, the first through hole 2021 and the second through hole 2031 can also be staggered. In this case, the path of the adhesive insulating medium to the interval 800 is longer, and the injection efficiency is lower than the injection efficiency when the first through hole 2021 and the second through hole 2031 are coaxially arranged.

[0058] In this embodiment, in actual use, one shock wave generating assembly may be provided at the distal end of the inner tube 300, or two or three shock wave generating assemblies may be provided. The specific number is set according to the actual use of different treatment positions and is not limited here.

[0059] The inner electrode group in each of the above-mentioned shock wave generating components in this embodiment may include an inner electrode. When the inner electrode group includes an inner electrode, two shock wave generating components need to be arranged at the distal end of the catheter, and injection channels 700 are also formed on the two shock wave generating components, so that the inner electrode and the inner tube 300 as well as the insulating layer 202 and the outer electrode 203 can be coaxially assembled and fixed accordingly. The two inner electrodes are respectively connected to the positive and negative poles of the power supply, and an external discharge channel 204 is formed between the inner electrode and the corresponding outer electrode 203, or through holes can be opened in the corresponding insulating layer 202 and the outer electrode 203, and an internal discharge channel is formed by using the through holes.

[0060] See also Figure 8 , is a structural schematic diagram when the inner electrode group in each of the above-mentioned shock wave generating components includes an inner electrode. When the inner electrode group includes an inner electrode, two shock wave generating components need to be set at the distal end of the catheter. The channels between the two outer electrodes in the two shock wave generating components are connected by a connecting wire 2015. At this time, the orthographic projection of the injection channel 700 on the inner tube 300 falls into the orthographic projection of the corresponding inner electrode 201 on the inner tube 300, that is, the injection channel 700 is set corresponding to the part of the inner electrode 201.

[0061] In another convertible embodiment, the internal electrode group in this embodiment includes two internal electrodes. In this case, discharge can be achieved by setting a shock wave generating assembly at the distal end of the catheter. Of course, two shock wave generating assemblies can also be set. When more than two shock wave generating assemblies are set, for two adjacent shock wave generating components 200, the internal electrode of one shock wave generating component 200 is connected to the internal electrode of the other shock wave generating component 200 through a wire, and the other internal electrode is connected to the internal electrode 2013 of the other shock wave generating component through a wire.

[0062] Specifically, when the inner electrode group includes two inner electrodes, the two inner electrodes are defined as a first inner electrode 2011 and a second inner electrode 2013. The two inner electrodes, namely the first inner electrode 2011 and the second inner electrode 2013, are sleeved on the outer wall surface of the inner tube 300, and the two inner electrodes are spaced apart on both sides of the injection channel 700. Therefore, the space between the first inner electrode 2011 and the second inner electrode 2013 is connected to the injection channel. The insulating layer 202 is sleeved on the outer wall surface of the first inner electrode 2011 and the second inner electrode 2013, and the outer electrode 203 is sleeved on the outer wall surface of the insulating layer 202. When the bonding insulating medium flows into the gap from the space 800 along the injection channel 700, the injection of the bonding insulating medium is completed. Afterwards, the gap 800 is also filled with an adhesive insulating medium, thereby ensuring that there is no discharge between the first inner electrode 2011 and the second inner electrode 2013, achieving the effect of insulation and isolation between the two inner electrodes, so that after the shock wave generating assembly is connected to the power supply 600 for use, the current passes through the preset discharge channel of the shock wave generating component, ensuring the use effect of the shock wave generating catheter, avoiding the current from being generated between the two inner electrodes, and thus avoiding the discharge phenomenon caused by connecting the two electrodes, further overcoming the defect in the prior art that there is a discharge phenomenon between the two inner electrodes of the same inner electrode group, thereby causing the current not to pass through the preset discharge channel of the shock wave generating component, resulting in poor use effect of the shock wave balloon catheter.

[0063] It should be noted that when the inner electrode group includes two inner electrodes, the orthographic projection of the injection channel 700 on the inner tube 300 does not fall within the orthographic projection of the first inner electrode 2011 and the second inner electrode 2013 on the inner tube 300, that is, the injection channel 700 avoids the first inner electrode 2011 and the second inner electrode and is opened on the insulating layer 202 and the outer electrode 203.

[0064] In order to effectively prevent the bonding insulating medium from exceeding the first through hole 2021 of the outer electrode 203 after being injected into the gap 800, resulting in the problem that the overall size of the electrode component is too large, the cross-sectional area of ​​the first through hole 2021 used to form the injection channel 700 can be set to be larger than the cross-sectional area of ​​the second through hole 2031, and the orthographic projection of the second through hole 2031 on the inner tube 300 can be set to fall within the orthographic projection of the first through hole 2021 on the inner tube 300, thereby ensuring that the bonding insulating medium can first fill the above-mentioned gap 800, thereby effectively preventing the bonding insulating medium from exceeding the first through hole 2021 of the outer electrode 203, resulting in the problem that the overall size of the electrode component is too large.

[0065] In this embodiment, see Figure 5 and Figure 6 The cross-sections of the first through hole 2021 and the second through hole 2031 can be set to be circular, and the first through hole 2021 and the second through hole 2031 can be coaxially arranged, and the inner diameter of the first through hole 2021 can be larger than the inner diameter of the second through hole 2031, so as to ensure that the cross-sectional area of ​​the first through hole 2021 is larger than the cross-sectional area of ​​the second through hole 2031.

[0066] In actual use, the ratio of the diameter of the second through hole 2031 to the diameter of the first through hole 2021 can be between 0.4-0.8. For example, taking the ratio of the diameter of the second through hole 2031 to the diameter of the first through hole 2021 as 0.5, the inner diameter of the second through hole 2031 can be set to 0.1mm, and the inner diameter of the first through hole 2021 can be set to 0.2mm. Of course, it can also be set to other sizes, which are not specifically limited here. In order to ensure the strength of the insulating layer 202 and the external electrode 203 after opening, it is necessary to limit the size of the first through hole 2021 opened on the insulating layer 202 to between 0.2-1mm, and the inner diameter of the second through hole 2031 opened on the external electrode 203 to between 0.1-0.5mm.

[0067] In this embodiment, the above-mentioned bonding insulating medium can be made of insulating glue. In actual use, the insulating glue is epoxy glue or UV glue.

[0068] In this embodiment, a first through-hole 2032 can be opened on the outer electrode 203 at positions corresponding to the first inner electrode 2011 and the second inner electrode 2013, and a second through-hole 2022 can be opened on the insulating layer 202 at positions corresponding to the first through-hole 2032. The corresponding first through-hole 2032 and the second through-hole 2022 form an internal discharge channel, so that the shock wave generating component has two internal discharge channels. The first inner electrode 2011 is connected to the high-voltage pulse power supply 600 through the first wire 2012, and the second inner electrode 2013 is connected to the high-voltage pulse power supply 600 through the second wire 2014. The ends of the first wire 2012 and the second wire 2014 are respectively arranged in the gap between the first inner electrode 2011 and the second inner electrode 2013 and the inner tube 300.

[0069] In actual use, the first current through hole 2032 and the second current through hole 2022 can be coaxially arranged, and the first wire 2012 and the second wire 2014 can be connected to the high-voltage pulse power supply 600 respectively. Then, the current is transmitted to the first inner electrode 2011 and the second inner electrode 2013 through the first wire 2012 and the second wire 2014 respectively, and the conductive liquid around the first inner electrode 2011 and the second inner electrode 2013 is broken down. When the breakdown reaches a certain degree, a large current passes through the two discharge channels, a large amount of energy can be obtained in a very short time, the temperature rises sharply, and the two discharge channels are heated and the volume increases, forming a shock wave to soften and lyse the diseased area, thereby achieving the treatment purpose.

[0070] In this embodiment, two first current passing holes 2032 are opened on the outer electrode 203, and two second current passing holes 2022 are correspondingly opened on the insulating layer 202. Each of the above-mentioned first current passing holes 2032 and each of the second current passing holes 2022 can be circular, and the inner diameter of the first current passing hole 2032 can be set larger than the inner diameter of the second current passing hole 2022 to ensure the normal use of the balloon 100 catheter. Of course, it can also be rectangular, elliptical, triangular, diamond-shaped, etc.

[0071] In actual use, the inner diameter of the first current through hole 2032 on the outer electrode 203 can be set to 0.05 mm-0.5 mm, and the inner diameter of the two second current through holes 2022 on the insulating layer 202 can be set to 0.05 mm-0.5 mm.

[0072] As an alternative embodiment, see Figure 4The first inner electrode 2011 and the second inner electrode 2013 can be set as metal rings, the wall thickness of the two inner electrodes is set to 0.2-1mm, and the length is set to 0.5-1mm. The material of the two inner electrodes is metal, wherein the metal is selected from gold, silver, copper, tantalum, stainless steel, tungsten alloy or platinum-iridium alloy, preferably stainless steel. The two inner electrodes are sleeved on the inner tube 30040 and are coaxial with the inner tube 300, and can be well coaxially sleeved on the outside of the inner tube 300.

[0073] Similarly, the insulating layer 202 is also configured as an annular sleeve structure. The insulating layer 202 has a length of 1-4 mm and a thickness of 0.05 mm-0.2 mm. The material is polyamide, polyether block amide (PEBA), polyethylene terephthalate (PET), polyamide or nylon, preferably polyamide.

[0074] Similarly, the wall thickness of the outer electrode 203 is set to 0.2-01mm and the length is 1-4mm. The outer electrode 203 is also a metal ring that can be directly sleeved on the outside of the insulating layer 202. The metal ring can be made of one or more metals such as gold, silver, copper, tantalum, stainless steel, tungsten alloy or platinum-iridium alloy.

[0075] In another alternative embodiment, see Figure 7 It is also possible not to open the first and second through-holes on the insulating layer 202 and the external electrode 203, and form an external discharge through hole 204 between the inner electrode and the outer electrode. This forming method is simple and easy to operate.

[0076] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A shock wave balloon catheter, characterized in that: include: an inner tube (300), wherein the distal end of the inner tube (300) is disposed inside the balloon (100); A shock wave generating assembly, wherein at least one shock wave generating assembly is arranged at the distal end of the inner tube (300), the shock wave generating assembly comprising an inner electrode group (201), an insulating layer (202) and an outer electrode (203), wherein the inner electrode group (201) comprises at least one inner electrode, all of the inner electrodes are sleeved on the outer wall surface of the inner tube (300), the insulating layer (202) is sleeved on the outer wall surface of the inner electrode, the outer electrode (203) is sleeved on the outer wall surface of the insulating layer (202), and there is a gap between the outer electrode (203), the insulating layer (202), the inner electrode group (201) and the inner tube (300); An injection channel (700) is formed between the corresponding insulating layer (202) and the outer electrode (203), and the injection channel (700) is connected to the gap so that the bonding insulating medium can be transported into the gap along the injection channel (700) and is suitable for flowing toward the end of the conduit along the gap.

2. The shock wave balloon catheter according to claim 1, characterized in that: A first through hole (2021) and a second through hole (2031) are respectively provided on the insulating layer (202) and the external electrode (203), and the first through hole (2021) and the second through hole (2031) are suitable for forming the injection channel (700).

3. The shock wave balloon catheter according to claim 2, characterized in that: The first through hole (2021) and the second through hole (2031) are coaxially arranged.

4. The shock wave balloon catheter according to any one of claims 1 to 3, characterized in that: The bonding insulating medium adopts insulating glue.

5. The shock wave balloon catheter according to claim 4, characterized in that: The insulating glue is epoxy glue or UV glue.

6. The shock wave balloon catheter according to claim 4, characterized in that: At least two shock wave generating assemblies are arranged at the distal end of the inner tube (300), and the inner electrode group (201) of each shock wave generating assembly comprises an inner electrode, and two adjacent inner electrodes are respectively connected to a positive and negative power source; or; At least one shock wave generating assembly is arranged at the distal end of the inner tube (300), and the inner electrode group (201) of each shock wave generating assembly includes two inner electrodes, namely a first inner electrode (2011) and a second inner electrode (2013), the first inner electrode (2011) and the second inner electrode (2013) being arranged at intervals on both sides of the injection channel (700), and in the process that the adhesive insulating medium is transported into the gap along the injection channel (700) and is suitable for flowing along the gap toward the two ends of the catheter, the adhesive insulating medium is suitable for filling the gap (800).

7. The shock wave balloon catheter according to claim 2 or 3, characterized in that: The cross-sectional area of ​​the first through hole (2021) is greater than the cross-sectional area of ​​the second through hole (2031), and the orthographic projection of the second through hole (2031) on the inner tube (300) falls within the orthographic projection of the first through hole (2021) on the inner tube (300).

8. The shock wave balloon catheter according to claim 7, characterized in that: The ratio of the diameter of the second through hole (2031) to the diameter of the first through hole (2021) is between 0.4 and 0.

8.

9. The shock wave balloon catheter according to claim 6, characterized in that: When the inner electrode group (201) includes the first inner electrode (2011) and the second inner electrode (2013), first through-holes (2032) are respectively opened at positions corresponding to the first inner electrode (2011) and the second inner electrode (2013) on the outer electrode (203), and second through-holes (2022) are opened on the insulating layer (202) corresponding to the first through-holes (2032), and the corresponding first through-holes (2032) and the second through-holes (2022) form an internal discharge channel, so that the shock wave generating component has two internal discharge channels; The first inner electrode (2011) is connected to a high-voltage pulse power source (600) via a first wire (2012), and the second inner electrode (2013) is connected to a high-voltage pulse power source (600) via a second wire (2014). Ends of the first wire (2012) and the second wire (2014) are respectively arranged in a gap between the first inner electrode (2011) and the second inner electrode (2013) and the inner tube (300).

10. The shock wave balloon catheter according to claim 9, characterized in that: The first power through hole (2032) and the second power through hole (2022) are both circular, and the inner diameter of the first power through hole (2032) is greater than the inner diameter of the second power through hole (2022).

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