CN114366237B

CN114366237B - Electrode structure and sacculus

Info

Publication number: CN114366237B
Application number: CN202210021842.XA
Authority: CN
Inventors: 刘斌; 李斌; 胡军
Original assignee: Sonosemi Medical Co Ltd
Current assignee: Sonosemi Medical Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2023-11-24
Anticipated expiration: 2042-01-10
Also published as: CN114366237A

Abstract

The invention relates to the technical field of medical instruments, and discloses an electrode structure and a balloon. The electrode structure comprises a tube body, an inner electrode and an outer electrode, wherein a tube cavity is arranged in the tube body, and a discharge channel which extends along the axis direction of the tube body and is communicated with the outer peripheral wall of the tube body is arranged on the tube body; an internal electrode disposed in the discharge channel; the external electrodes are arranged on the peripheral walls at two sides of the discharge channel, and the internal electrode and the external electrode are communicated in a closed loop; the inner electrode, the outer electrode and the tube body are integrally formed. When the inner electrode and the outer electrode are conducted, the inner electrode and the outer electrode can break down at the discharge channel, so that shock waves are generated, and the inner electrode and the outer electrode are used for focus positions needing to be treated; the process of bonding in the prior art is reduced by integrally forming the inner electrode, the outer electrode and the pipe body, the processing is more convenient, and meanwhile, the firmness of connection of the inner electrode and the outer electrode is ensured, and the stability of shock waves is further ensured.

Description

Electrode structure and sacculus

Technical Field

The invention relates to the technical field of medical instruments, in particular to an electrode structure and a balloon.

Background

Cardiovascular disease has been one of the leading causes of death in the world. Among them, atherosclerosis is a cardiovascular disease of arterial stenosis and hardening diseases caused by plaque accumulation. These plaques impede the normal flow of blood, reducing the supply of oxygen and nutrients to heart tissue. The composition of plaque typically comprises fibrous tissue, fat, and calcium. Angioplasty balloons are one of the necessary instruments for dilating a lesion (e.g., a calcified lesion) and restoring normal blood flow in an artery, but for a calcified lesion, the balloon internal pressure is often required to be great, and the pressure inside the balloon gradually expands under the effect of the pressure, which ruptures the calcified lesion, which may also cause damage to the blood vessel. Currently, the SHOCKWAVE MEDICAL company of the united states applies electrohydrodynamic lithotripsy to angioplasty balloons and gains clinical acceptance. The basic principle is that bubbles are generated in the saccule filled with liquid by utilizing a certain voltage, the bubbles collapse in a very short time, and shock waves are generated, so that the purpose of cracking calcified pathological tissues is achieved. Once the calcified plaque is ruptured, the balloon may be further inflated to open the vessel.

In the prior art, as shown in fig. 1, the electrode pair in the shock wave balloon is generally composed of an inner electrode 100 and an outer electrode 200, which are stacked up and down outside the balloon tube body, an adhesive layer 300 is provided on the outer side wall of the tube body (the adhesive layer may be used for fixing the inner electrode 100 on the outer side wall of the inner tube), and then an inner electrode 100, an insulating layer 400 (1. For fixing the outer electrode 200;2. For separating the inner electrode 200 and performing breakdown through a discharge channel 500) and the outer electrode 200 are sequentially provided from inside to outside, and in general, the outer electrode 200 also needs to be glued on the insulating layer 400 to fix the outer electrode 200. The insulating layer 400 is provided with a discharge path 500. Such stacking is often done by adhesive attachment, and such electrode systems have poor stability.

Therefore, there is a need for an electrode structure and a balloon to solve the above problems.

Disclosure of Invention

Based on the above, the invention aims to provide an electrode structure and a balloon with good stability.

In order to achieve the above purpose, the invention adopts the following technical scheme:

an electrode structure comprising:

the tube comprises a tube body, wherein a tube cavity is formed in the tube body, and a discharge channel which extends along the axis direction of the tube body and is communicated with the peripheral wall of the tube body is formed in the tube body;

an internal electrode disposed within the discharge channel;

the outer electrodes are arranged on the peripheral walls at two sides of the discharge channel, and the inner electrodes and the outer electrodes are communicated in a closed loop;

the inner electrode, the outer electrode and the tube body are integrally formed.

As a preferable mode of the electrode structure, the tube cavity is arranged coaxially with the tube body, and two or more discharge channels are arranged in the circumferential direction of the tube body.

As a preferred embodiment of an electrode structure, the outer electrodes between two adjacent inner electrodes are disposed in communication.

As a preferable mode of the electrode structure, the tube cavity and the tube body are eccentrically arranged, and the discharge channel is arranged at one side of the axis of the tube cavity far away from the tube body.

As a preferred embodiment of an electrode structure, the inner electrode is provided with a wire guide, which is electrically connected with the outer electrode to form the closed loop.

As a preferred scheme of the electrode structure, the electrode structure further comprises a conductive rod and a wire, one end of the conductive rod is arranged in the wire hole and is electrically connected with the wire hole, the other end of the conductive rod is electrically connected with the wire, and the other end of the wire is electrically connected with the external electrode.

As a preferred embodiment of the electrode structure, the radial cross section of the inner electrode is circular.

As a preferable mode of the electrode structure, the radial section of the inner electrode is semi-circular.

As a preferable mode of an electrode structure, the inner side wall of the inner electrode and the inner side wall of the tube body form an outer wall of the tube cavity.

A balloon comprising an electrode structure according to any one of the above aspects.

The beneficial effects of the invention are as follows:

according to the invention, the inner electrode and the outer electrode are arranged inside and outside the discharge channel, and the inner electrode and the outer electrode are conducted in a closed loop, so that when the inner electrode and the outer electrode are conducted, breakdown can be performed at the discharge channel, and then shock waves are generated, and the shock waves are further used for focus positions needing to be treated; the inner electrode, the outer electrode and the pipe body are integrally formed, so that the bonding process in the prior art is reduced, the processing is more convenient, the connection firmness of the inner electrode and the outer electrode is ensured, and the stability of shock waves is further ensured; through setting up the discharge channel to extend along the axis direction of pipe body for the length direction of electrode structure homoenergetic is broken down, forms the effect of shock wave better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.

FIG. 1 is an axial cross-sectional view of an electrode structure provided in the prior art;

FIG. 2 is a schematic view of a balloon provided in an embodiment of the present invention;

FIG. 3 is a radial cross-sectional view of an electrode structure provided in accordance with an embodiment of the present invention;

FIG. 4 is a radial cross-sectional view of another electrode structure provided in accordance with an embodiment of the present invention;

fig. 5 is a radial cross-sectional view of yet another electrode structure provided in accordance with an embodiment of the present invention.

In the figure:

100. an inner electrode; 200. an external electrode; 300. an adhesive layer; 400. an insulating layer; 500. a discharge channel;

1. a tube body; 11. a lumen of the tube; 12. a discharge channel;

2. an inner electrode; 21. a wire guide;

3. an external electrode;

51. a body; 52. a conductor; 53. a bladder; 54. electrode structure.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 2, the present embodiment provides a balloon, including a body 51 and a conductor 52 extending from the body 51, wherein a balloon 53 is disposed at one end of the conductor 52 away from the body 51, an electrode structure 54 is disposed on the conductor 52, the electrode structure 54 is disposed in the balloon 53, the conductor 52 can make the balloon 53 and the electrode structure 54 penetrate into a focus portion, and stable shock waves are generated after the electrode structure 54 is conducted, so as to achieve a therapeutic effect on the focus portion. Preferably, a plurality of electrode structures 54 are spaced apart on the conductor 52 to ensure that multiple focal sites can be treated while ensuring better impact.

As shown in fig. 3 to 5, the present embodiment provides an electrode structure, which can be used for the balloon described above, the electrode structure 54 comprising a tube body 1, an inner electrode 2 and an outer electrode 3, wherein a tube cavity 11 is provided in the tube body 1, and a discharge channel 12 extending in the axial direction of the tube body 1 and communicating with the outer peripheral wall thereof is provided on the tube body 1; the inner electrode 2 is arranged in the discharge channel 12; the outer electrodes 3 are arranged on the outer peripheral walls of the two sides of the discharge channel 12, and the inner electrode 2 and the outer electrode 3 are conducted in a closed loop; the inner electrode 2, the outer electrode 3 and the tube body 1 are integrally formed.

By arranging the inner electrode 2 and the outer electrode 3 inside and outside the discharge channel 12 and conducting the inner electrode 2 and the outer electrode 3 in a closed loop, when the inner electrode 2 and the outer electrode 3 are conducted, the inner electrode 2 and the outer electrode 3 can break down at the discharge channel 12, so that shock waves are generated and used for focus positions needing to be treated; the inner electrode 2, the outer electrode 3 and the pipe body 1 are integrally formed, so that the bonding process in the prior art is reduced, the processing is more convenient, the connection firmness of the inner electrode 2 and the outer electrode 3 is ensured, and the stability of shock waves is further ensured; by arranging the discharge channel 12 to extend in the axial direction of the tube body 1, the length direction of the electrode structure 54 can be broken down, and the effect of forming a shock wave is better.

It should be noted that the tube body 1 is made of an insulating material to prevent the inner electrode 2 and the outer electrode 3 from being broken down except for the discharge channel 12. After the electrode structure 54 is integrally formed, the conductor 52 is inserted into the lumen 11 and is connected by adhesive to facilitate delivery of the electrode structure 54 to the lesion site.

As an alternative to the electrode structure, as shown in fig. 3 and 5, a tube cavity 11 is provided coaxially with the tube body 1, and two or more discharge channels 12 are provided in the circumferential direction of the tube body 1. Correspondingly, the discharge channels 12 are provided with inner electrodes 2 in one-to-one correspondence, and the outer electrodes 3 are provided on the outer peripheral walls of the two sides of the discharge channels 12 in one-to-one correspondence. By arranging more than two discharge channels 12, the impact treatment is carried out on the circumference of the focus part, and the impact effect is more balanced.

Alternatively, the outer electrodes 3 between two adjacent inner electrodes 2 are arranged in communication, i.e. the outer electrodes 3 are ring electrodes. Illustratively, when the discharge channel 12 is provided in two, the outer circumference of the tube body 1 is provided with two annular outer electrodes 3.

Since the inner electrode 2 is adhered to the insulating layer in the prior art, the conductive wire for conducting the inner electrode 2 and the outer electrode 3 can be embedded between the inner electrode 2 and the insulating layer in the process of adhesion, so as to conduct the inner electrode 2 and the outer electrode 3. Specifically, in the present embodiment, the inner electrode 2 is provided with a wire hole 21, and the inner electrode 2 is electrically connected to the outer electrode 3 through the wire hole 21 to form a closed circuit. It will be understood, of course, that in this embodiment the inner electrode 2 and the outer electrode 3 may also be electrically connected by means of adhesive.

Further, the electrode structure 54 further includes a conductive rod and a wire, wherein one end of the conductive rod is disposed in the wire guide 21 and is electrically connected with the wire guide 21, and the conductive rod is adapted to the size of the wire guide 21, so that the connection is more firm and convenient; the other end of the conductive rod is electrically connected with a wire, and the other end of the wire is electrically connected with the external electrode 3; meanwhile, an external circuit can be conducted on the lead, so that the conduction of the inner electrode 2 and the outer electrode 3 and the magnitude of impact force generated can be realized.

The current direction of the closed loop when two discharge channels 12 are provided is: the current flows into one of the inner electrodes 2 through the lead wire and the guide rod, the inner electrode 2 breaks down the corresponding discharge channel 12 to form conduction, so that the current flows to the corresponding outer electrode 3, and as the two adjacent outer electrodes 3 are communicated, the current flows to one end close to the other inner electrode 2 and breaks down the discharge channel 12 of the end corresponding to the inner electrode 2 to form conduction, so that the current flows to the inner electrode 2, and finally flows back to the lead wire through the conductive rod of the inner electrode 2 to form a closed loop.

Optionally, in order to conduct the external electrode 3 and the wire, a wire fixing hole is provided on the external electrode 3, and the wire is electrically connected with the wire fixing hole. It should be noted that, in other embodiments, the discharge channels 12 are further provided, and those skilled in the art can set the current flow between the inner electrodes 2 and the outer electrodes 3 according to the need. When the external electrodes 3 between the adjacent internal electrodes 2 are disposed in communication, it is only necessary to provide a wire fixing hole at the external electrode 3 electrically connected to the wire.

As shown in fig. 4, as an alternative to an electrode structure, the body cavity 11 is disposed eccentrically to the tube body 1, and can be used for treating a patient whose calcification is eccentric with respect to the calcification of a lesion, thereby improving the application range and pertinence of the treatment of the electrode structure 54. Specifically, the discharge channel 12 is disposed on a side of the axis of the tube cavity 11 away from the tube body 1, and the discharge channel 12 is opposite to the calcification site to perform targeted shock waves. Illustratively, the axis of the lumen 11 and the axis of the inner electrode 2 lie on the same diameter of the tube body 1.

The eccentrically arranged electrode structure 54 is typically provided with a discharge channel 12, the current direction of the closed loop of the electrode structure 54 being: the current flows into the inner electrode 2 through the lead wire and the guide rod, the inner electrode 2 breaks down the discharge channel 12 to form conduction, so that the current flows to the outer electrode 3 and finally flows back to the lead wire to form a closed loop.

As an alternative to the electrode structure, as shown in fig. 3 and 4, the radial cross section of the inner electrode 2 is circular, and accordingly, the wire guide 21 is disposed coaxially with the inner electrode 2. The electrode structure 54 is configured to have the same physical dimensions as the electrode structure 54 of the prior art.

As an alternative to the electrode structure, as shown in fig. 5, the radial cross section of the inner electrode 2 is semi-circular. The electrode structure 54 of this arrangement is smaller in size than the electrode structure 54 of the prior art, effectively controlling the diameter of the electrode structure 54 so that a balloon using the electrode structure 54 may be advanced into and out of a more stenosed lesion.

Illustratively, the wire guide 21 is provided at one side of the inner electrode 2 having a semicircular shape in radial section, to prevent the inner electrode 2 from being broken down, resulting in damage to the inner electrode 2.

Alternatively, the inner side wall of the inner electrode 2 and the inner side wall of the tube body 1 form the outer wall of the tube cavity 11, further reducing the diameter of the tube body 1.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Claims

1. An electrode structure, comprising:

the tube comprises a tube body (1), wherein a tube cavity (11) is formed in the tube body (1), and a discharge channel (12) which extends along the axis direction of the tube body (1) and is communicated with the outer peripheral wall of the tube body (1) is formed in the tube body (1);

an inner electrode (2) disposed in the discharge channel (12);

the outer electrodes (3) are arranged on the outer peripheral walls at two sides of the discharge channel (12), and the inner electrodes (2) and the outer electrodes (3) are conducted in a closed loop;

the inner electrode (2), the outer electrode (3) and the pipe body (1) are integrally formed;

the tube body cavity (11) and the tube body (1) are eccentrically arranged, the axes of the discharge channel (12) and the tube body cavity (11) are positioned on two opposite sides of the axis of the tube body (1), the tube body cavity (11) is used for penetrating the conductor (52), and the conductor (52) is used for conveying the electrode structure to a target position.

2. Electrode structure according to claim 1, characterized in that the inner electrode (2) is provided with a wire guide (21), which wire guide (21) is electrically connected with the outer electrode (3) to form the closed loop.

3. Electrode structure according to claim 2, characterized in that it further comprises a conductive rod and a wire, one end of the conductive rod being placed in the wire guide (21) and being electrically connected to the wire guide (21), the other end being electrically connected to the wire, the other end of the wire being electrically connected to the outer electrode (3).

4. An electrode structure according to any one of claims 1-3, characterized in that the radial cross-section of the inner electrode (2) is circular.

5. An electrode structure according to any one of claims 1-3, characterized in that the radial cross-section of the inner electrode (2) is semi-circular.

6. Electrode structure according to claim 5, characterized in that the inner side wall of the inner electrode (2) and the inner side wall of the tube body (1) form an outer wall of the tube cavity (11).

7. A balloon comprising an electrode structure (54) according to any one of claims 1-6, a body (51), a conductor (52) and a balloon (53), said conductor (52) extending from said body (51), said balloon (53) being arranged on said conductor (52) at an end remote from said body (51), said conductor (52) being arranged in said lumen (11) such that said electrode structure (54) is arranged on said conductor (52) and is arranged in said balloon (53).