CN219166541U - Electrode wire for liquid electric lithotripsy and liquid electric lithotripsy device - Google Patents

Abstract

The present disclosure relates to an electrode lead for electrohydraulic lithotripsy and a electrohydraulic lithotripsy device. The electrode lead for the liquid electric lithotripsy comprises: a first electrode having an extension direction; an insulator surrounding the first electrode, wherein a distal end of the first electrode is exposed to a distal end of the insulator in an extending direction; and at least two second electrodes located in the insulator and extending in the extending direction, distal ends of the second electrodes being exposed to distal ends of the insulator, the at least two second electrodes being disposed at intervals from each other. The electrode lead for the liquid electric lithotripsy can realize rich discharge forms and has higher structural strength.

Description

Electrode wire for liquid electric lithotripsy and liquid electric lithotripsy device

Technical Field

The disclosure relates to the field of electronic equipment, in particular to an electrode lead for liquid-electricity lithotripsy and a liquid-electricity lithotripsy device.

Background

In vivo calculus belongs to frequently occurring and common diseases, including calculus of liver and gall system, urinary system and digestive system, and the disease causes are complex, for example, untimely treatment can seriously threaten the health of people. The in-vivo lithotripter for endoscope is a device for directly introducing lithotripter energy into the body through the inspection channels of the endoscope such as a fiber choledochoscope, a hard cholecystoscope, a duodenoscope, a gastroscope, a cystoscope, a ureteroscope, a percutaneous nephroscope and the like and releasing the energy aiming at the surface of the lithotripter so as to break the lithotripter. The energy is directionally conducted through the electrodes.

The electrohydraulic lithotripsy technology (Electrohydraulic Lithotripsy, EHL) is an important technology for safely and effectively treating difficult-to-get calculus in biliary tract. The technology of liquid-electricity stone breaking utilizes the principle of high-voltage oscillation wave generated by high-voltage electricity, in particular to a coaxial bipolar electrode is placed in water or normal saline, and is electrified to trigger high voltage between the bipolar electrodes, when the voltage difference between the two electrodes exceeds the large resistance of an insulating layer, spark is generated between the electrodes, and plasma is formed. A plasma is an uncharged ionized species consisting of ions, electrons and core particles, and a plasma comprising a large number of ions and electrons is a good conductor of electricity. The shock wave with certain electric power vibrates in the water, so that the gas dissolved in the water can be released to form tiny bubbles, and then the gas in the bubbles expands and collapses in the very short time of the shock wave movement to form liquid shock wave broken stone.

In EHL application, a very thin electrode wire is required to apply a shock wave near a stone in a human body to achieve the purpose of stone breaking. The electrode lead is led out from the internal liquid electric lithotripter and led to the vicinity of the calculus through the instrument channel of the endoscope. In the prior electrode lead, one of the positive electrode and the negative electrode is wrapped around the other electrode to form a coaxial structure with different layers, the electrodes are separated by a coaxial insulating layer, the periphery of the electrode lead is also wrapped by the insulating layer, and the two electrodes are exposed out of the distal end face of the electrode lead at the distal end face.

Disclosure of Invention

Based on the above, an electrode lead for the liquid electric lithotripsy is provided so as to adapt to different requirements.

The disclosed embodiments provide an electrode lead for electrohydraulic lithotripsy, comprising: a first electrode having an extension direction; an insulator surrounding the first electrode, wherein a distal end of the first electrode is exposed to a distal end of the insulator in an extending direction; and at least two second electrodes located in the insulator and extending in the extending direction, distal ends of the second electrodes being exposed to distal ends of the insulator, the at least two second electrodes being disposed at intervals from each other.

By arranging at least two second electrodes, the discharge state between the first electrode and the second electrode can be better controlled, and the multi-electrode conductive device provided by the embodiment of the disclosure can realize discharge with different powers at the second end of the wire body and can also discharge in different directions. In addition, the distributed second electrode is matched with the first electrode, so that the electrode wire for the liquid-electricity lithotripsy has higher structural strength, and can be better prevented from being broken in the use process.

In some embodiments, the number of second electrodes is four, and the second electrodes are uniformly disposed along the circumferential direction of the first electrode.

The second electrodes distributed at different positions can perform different radial discharge with the first electrodes, and in addition, the more accurate discharge position can be realized while the output power is controlled. The four second electrodes can better control the discharge performance in each direction, and simultaneously help to control the structural strength of each second electrode.

In some embodiments, the insulator comprises a first insulating layer and a second insulating layer, the first electrode, the first insulating layer and the second insulating layer are sequentially arranged from inside to outside, and the second electrode is positioned in the second insulating layer.

By this arrangement, the first electrode and the second electrode can be ensured to be insulated and the second electrode to each other to achieve a better discharge at the distal end. In addition, the wire body can be manufactured more easily, and the strength of the wire body can be improved.

In some embodiments, the cross-sectional area of the at least one second electrode is less than the cross-sectional area of the first electrode.

By controlling the cross-sectional area of the second electrode, the discharge state between the first electrode and the second electrode can be better controlled.

In some embodiments, the at least two second electrodes comprise two of different cross-sectional areas, or the at least two second electrodes comprise two of different resistances.

The electrode wires for the liquid electric lithotripsy provided by the embodiment of the disclosure can realize more abundant discharge modes by combining the second electrodes with different cross sectional areas or different resistances.

In some embodiments, the center of one of the at least two second electrodes is closer to the center of the first electrode than the center of the other.

In another aspect, the disclosed embodiments provide a electrohydraulic lithotripsy device comprising: the electrode lead for the electrohydraulic lithotripsy; and a sleeve sleeved on the electrode wire for the liquid-electricity lithotripsy, wherein the sleeve is shorter than the electrode wire for the liquid-electricity lithotripsy along the extending direction of the electrode wire for the liquid-electricity lithotripsy, and the sleeve can slide relative to the electrode wire for the liquid-electricity lithotripsy.

The electrode wire for the liquid electric lithotripsy can be sleeved by the sleeve, the strength of the electrode wire for the liquid electric lithotripsy can be enhanced after the sleeve is matched with the electrode wire for the liquid electric lithotripsy, and then the sleeve and the electrode wire for the liquid electric lithotripsy can be smoothly and jointly penetrated into an endoscope, and the pushability of the electrode wire for the liquid electric lithotripsy in the penetrating process is good.

In some embodiments, the sleeve is adapted to be threaded through a jaw channel of an endoscope; the liquid electric lithotripter also comprises an electrode joint and a transition joint, wherein the electrode joint is fixedly connected to the proximal end of the electrode wire for liquid electric lithotripter, the transition joint is fixedly connected to the proximal end of the sleeve, the proximal end of the transition joint is detachably connected with the electrode joint, and the distal end of the transition joint is detachably connected with the endoscope.

The transition joint can be connected with the electrode joint, so that the electrode wire for the liquid-electricity lithotripsy can bear larger axial stress by means of the sleeve, and the trafficability is enhanced; when the forceps channel of the endoscope is in a bending state, the transition joint and the electrode joint can be separated, the sleeve is firstly retracted, the distal end of the electrode wire for the liquid-electricity lithotripsy is exposed out of the distal end of the sleeve, and when the electrode wire for the liquid-electricity lithotripsy passes through the bending part of the forceps channel, the sleeve is led to pass through the bending part, that is to say, the axial relative positions of the sleeve and the electrode wire for the liquid-electricity lithotripsy are adjusted, the electrode wire for the liquid-electricity lithotripsy can be protected by the sleeve, and the electrode wire guiding sleeve for the liquid-electricity lithotripsy can be matched with each other, so that the trafficability is enhanced.

In some embodiments, the sleeve is adapted to be threaded through a jaw channel of an endoscope, the sleeve including a first set of graduation marks for indicating the depth of the sleeve extending into the jaw channel; the electrode lead for the liquid electric lithotripsy comprises a second group of scale marks, and the second group of scale marks are used for marking the depth of the electrode lead for the liquid electric lithotripsy extending into the sleeve.

The distance that the distal end of the electrode wire for the liquid electric lithotripsy protrudes out of the endoscope can be judged and controlled through the positions of the first group of graduation marks and the positions of the second group of graduation marks.

In some embodiments, the electrohydraulic lithotripsy apparatus further comprises a power supply device electrically connected to the electrode wire for electrohydraulic lithotripsy, the power supply device configured to: different combinations of at least two second electrodes are powered in response to different power supply signals. The positive electrode of the power supply device is electrically connected to the first electrode, and the negative electrode of the power supply device is electrically connected to the second electrode.

So set up, the liquid electric stone breaking device can utilize power supply unit to carry out the power supply of different modes to the electrode wire for the liquid electric stone breaking, can realize the shock wave of different energies in turn. In addition, different discharge paths can be realized at the same discharge power, and diversified discharge is possible.

Drawings

FIG. 1 is a schematic cross-sectional view of a conventional electrode lead;

FIG. 2 is a schematic cross-sectional view of an electrode lead for electrohydraulic lithotripsy in an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a conductive device according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an assembled configuration of a electrohydraulic lithotripsy device and an endoscope in an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a electrohydraulic lithotripsy device in an embodiment of the present disclosure;

fig. 6 is a schematic diagram of an assembled structure of an electrohydraulic lithotripsy device and an endoscope in an embodiment of the present disclosure.

Reference numerals: 1a, a conductive core; 2a, a conductive film; 4a, an isolation layer; 5a, a protective layer; 100. a conductive device; 10. electrode lead for liquid electric stone breaking; 101. a distal end of the wire body; 1. a first electrode; 2. a second electrode; 21. a first second electrode; 22. a second electrode; 20. an electrode joint; 201. an electrode joint proximal end; 202. an electrode joint distal end; 3. an insulator; 4. a first insulating layer; 5. a second insulating layer; 6. an endoscope; 601. a clamp path; 7. a pipe joint; 701. a proximal end of the tube fitting; 8. an insertion section; 81. a hard pipe section; 82. a controllable bend section; 821. a distal end face of the endoscopic insertion portion; 9. a sleeve assembly; 11. a sleeve; 12. a transition joint; 121. a proximal end of the transition joint; 122. a distal end portion of the transition joint; 13. a second set of graduation marks; 14. a first set of graduation marks; 141. a first scale line; 142. a second graduation mark; 143. a third scale mark; 15. a power supply device; 16. a power supply connector; 200. an electrohydraulic stone crushing device.

Detailed Description

In order to make the above objects, features and advantages of the embodiments of the present disclosure more comprehensible, a detailed description of specific embodiments of the present disclosure is provided below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. The disclosed embodiments may be embodied in many other forms other than described herein and similar modifications may be made by those skilled in the art without departing from the spirit of the disclosed embodiments, so that the disclosed embodiments are not limited to the specific examples of embodiments described below.

In the description of the embodiments of the present disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of describing the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present disclosure.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. For example, the first electrode may also be referred to as a second electrode, and the second electrode may also be referred to as a first electrode. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.

In the presently disclosed embodiments, the terms "connected," "connected," and the like are to be construed broadly and, unless otherwise specifically indicated and defined, as being either fixedly connected, detachably connected, or integrally formed, for example; can be flexible connection or rigid connection along at least one direction; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The terms "mounted," "disposed," "secured," and the like may be construed broadly as connected. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the description of the present embodiment, the terms "near" and "far" are relative positional relationships, and when an operator operates an instrument to treat a target object, the side close to the operator is "near" and the side close to the target object is "far" along the instrument.

As shown in fig. 1, in some conventional techniques, the positive electrode and the negative electrode of the electrode lead for liquid-electricity lithotripsy are of a coaxial layered design, and specifically, a conductive core 1a may be used as the positive electrode and a conductive film 2a as the negative electrode. An isolation layer 4a is provided between the conductive core 1a and the conductive film 2a, and a protective layer 5a may be provided around the conductive film 2a in addition to the conductive film. Both the isolation layer 4a and the protection layer 5a may be insulating layers. The electrode wire for the liquid-electricity lithotripsy may be coaxially arranged layer by layer from inside to outside at the time of manufacture, and for example, the conductive film 2a may be wound around the separator 4a. In use, one end of the electrode wire for the electrohydraulic lithotripsy is connected with the electrohydraulic lithotripter, and at the other end, the conductive core 1a and the conductive film 2a are exposed to the outside for discharge. The applicant found that in the course of lithotripsy, the shock waves formed by such electrode leads for electro-hydraulic lithotripsy are difficult to achieve a good lithotripsy effect for different types of stones, and in addition, such electrode leads for electro-hydraulic lithotripsy.

Referring to fig. 2, fig. 2 shows an electrode lead for electrohydraulic lithotripsy in an embodiment of the present disclosure, and an electrode lead 10 for electrohydraulic lithotripsy provided in the embodiment of the present disclosure includes a first electrode 1, an insulator 3, and at least two second electrodes 2.

The first electrode 1 may have a certain length in the extending direction, and the length of the first electrode 1 is, for example, 5mm to 5000mm. Fig. 2 shows a cross section in this direction of extension. The first electrode 1 comprises a conductive material, such as copper.

The insulator 3 surrounds the first electrode 1. In other words, the insulator 3 may cover the radially outer side of the first electrode 1. The insulator 3 may also have a certain length in the extending direction, and the distal end of the first electrode 1 is exposed at least at the distal end of the insulator 3 in the extending direction. It will be appreciated that the electrode lead 10 for electro-hydraulic lithotripsy may extend distally into the chamber to be lithotripsy, and proximally out of the chamber, in use. Illustratively, the insulator 3 may have a generally cylindrical outer surface. The cylindrical outer contour contributes to the structural strength of the insulator 3,

the second electrode 2 is located in the insulator 3 and extends in the extending direction. The second electrode 2 is spaced apart from the first electrode 1 by an insulator 3 and is electrically insulated. The different second electrodes 2 are also spaced apart and electrically insulated. The distal end of each second electrode 2 is also exposed at the distal end of the insulator 3.

The electrode lead 10 for liquid electric lithotripsy provided in the embodiment of the present disclosure may be used by connecting the first electrode 1 to the positive electrode and the second electrode 2 to the negative electrode, and may be energized when the distal end thereof extends into the chamber and approaches the lithotripsy. For example, only one second electrode 2 may be energized, and a discharge arc may then be generated between the distal end of the first electrode 1 and the distal end of the energized second electrode 2. The electric arc may excite the liquid in the chamber to generate a shock wave that may impact the stone. Illustratively, different positions, different numbers of second electrodes 2 may be controlled to be energized, or all of the second electrodes 2 may be energized.

On the other hand, the diameter of the second electrode 2 has a larger value than the thickness of the usual conductive film 2a, and the size of the insulator 3 may be larger. The electrode wire 10 for the liquid electric lithotripsy provided by the embodiment of the disclosure can be smoother when pushed, and the bending probability is lower.

In summary, the electrode wire for the liquid-electricity lithotripsy provided by the embodiment of the disclosure has higher structural strength, can realize rich discharge effect, and accurately controls the direction and strength of an electric arc. The electrode lead for the liquid-electricity lithotripsy has good comprehensive benefit.

The insulator 3 may be a split structure or a one-piece structure, for example. The insulator 3 of one-piece construction may have a good strength.

In an exemplary embodiment, the insulator 3 includes a first insulating layer 4 and a second insulating layer 5. The first insulating layer 4 and the second insulating layer 5 may be integrated, and the thickness of the insulator 3 in the radial direction is relatively large. The first insulating layer 4 and the second insulating layer 5 are sequentially arranged from inside to outside, and the materials of the first insulating layer 4 and the second insulating layer can be the same or different. The first insulating layer 4 surrounds the first electrode 1, and may entirely cover the first electrode 1 radially outside the first electrode 1. The first insulating layer 4 is used to separate and electrically insulate the first electrode 1 from the second electrode 2. The second insulating layer 5 may be used to fix each second electrode 2 and electrically insulate between different second electrodes 2. The second electrode 2 may be located within the second insulating layer 5 to avoid the second electrode 2 from being exposed to the outside in the radial direction.

As shown in fig. 2, the number of second electrodes 2 is illustratively four. The four second electrodes 2 may form different combinations with each other. For example a combination of two second electrodes 2 and a combination of three second electrodes 2. The combination of the two second electrodes 2 may be two adjacent second electrodes 2 or two opposite second electrodes 2. When the electrode wire 10 for the liquid-electricity lithotripsy is energized, an arc may be generated on one side of the first electrode 1 or on the other side. By means of four second electrodes 2, an arc can be generated in all directions in a complete and flexible manner. Alternatively, another number of second electrodes 2, for example three, five or six, may be provided in the electrode lead 10 for electrohydraulic lithotripsy.

Illustratively, these second electrodes 2 are uniformly arranged along the circumferential direction of the first electrode 1. By this arrangement, the arc and the shock wave generated in each direction can be controlled uniformly. When the electrode lead 10 for the liquid-electricity lithotripsy is extended into the chamber at different rotational positions, an effective discharge effect can be achieved.

As shown in fig. 2, the cross-sectional area of at least one second electrode 2 is illustratively smaller than the cross-sectional area of the first electrode 1. By controlling the relation between the cross-sectional area of the second electrode 2 and the cross-sectional area of the first electrode 1, the load of the first electrode 1 can be effectively controlled.

Illustratively, the at least two second electrodes 2 comprise two of different cross-sectional areas. For example, the second electrodes 2 include a first second electrode 21 and a second electrode 22. The cross-sectional area of the first second electrode 21 may be different from the cross-sectional area of the second electrode 22. By providing the second electrodes 2 with different cross-sectional areas, the loading of the different second electrodes 2 can be controlled, and also the discharge effect of the combination of the different second electrodes 2 can be controlled.

Illustratively, the at least two second electrodes 2 comprise two of different resistances. Such a difference in resistance can be achieved by adjusting the cross-sectional area of the second electrode 2, or by adjusting the material of the second electrode 2. The second electrodes 2 comprise, for example, a first second electrode 21 and a second electrode 22. The cross-sectional area of the first second electrode 21 may be the same as the cross-sectional area of the second electrode 22, but the first second electrode 21 may be a copper wire and the second electrode 22 may be a tungsten wire. By providing the second electrodes 2 with different resistances, the load of the different second electrodes 2 can be controlled.

Illustratively, the center of one of the at least two second electrodes 2 is closer to the center of the first electrode 1 than the center of the other. The center of an electrode may refer to its centroid within the cross section. Illustratively, the center of the first second electrode 21 may be closer to the center of the first electrode 1 than the center of the second electrode 22. The electrode lead 10 for the liquid electric lithotripsy can realize rich impact forms and is suitable for crushing stones with different styles.

Illustratively, when the diameters of the plurality of second electrodes 2 are different, the respective centers may still be uniformly disposed along the circumferential direction of the first electrode 1. Illustratively, of all the second electrodes 2, at least some of the second electrodes 2 may be provided at uniform intervals along the circumferential direction of the first electrode 1

In an exemplary embodiment, each of the second electrodes 2 is a single, unitary electrode. The second electrode 2 has a good structural strength.

Referring to fig. 3, fig. 3 illustrates a conductive device in an embodiment of the present disclosure, in some embodiments, the conductive device 100 includes an electrode lead 10 for electro-hydraulic lithotripsy and an electrode tab 20. The electrode connector 20 may be connected to the proximal end of the electrode lead 10 for electro-hydraulic lithotripsy. The electrode tab 20 may include a plurality of conductive contacts for electrically connecting with the first electrode 1 and the different second electrode 2, respectively. The proximal end of electrode tab 20, electrode tab proximal end 201, may be adapted for electrical connection to an external power source. The electrode lead 10 for the liquid electric lithotripsy has a wire body distal end 101, the first electrode 1 and the second electrode 2 can be exposed at the wire body distal end 101, and the connection strength between the proximal end of the electrode lead 10 for the liquid electric lithotripsy and the electrode joint 20 is high and is not easy to break.

Referring to fig. 4, fig. 4 shows an assembled structure of the electrohydraulic lithotripsy device and an endoscope. Fig. 5 shows a cross section of a electrohydraulic lithotripsy device 200. Illustratively, the electro-hydraulic lithotripsy device 200 includes an electro-hydraulic lithotripsy electrode lead 10 and a cannula 11. The outer diameter of the electrode wire 10 for the electrohydraulic lithotripsy may be smaller than the inner diameter of the sleeve 11, and the two may have a gap after assembly.

The sleeve 11 may be fitted over the electrode wire 10 for the electrohydraulic lithotripsy, and the sleeve 11 may be shorter than the electrode wire 10 for the electrohydraulic lithotripsy along the extending direction. This ensures that both ends of the electrode lead 10 for the electrohydraulic lithotripsy protrude from the sleeve 11.

The sleeve 11 is slidable relative to the electrode lead 10 for the electrohydraulic lithotripsy. Illustratively, the electro-hydraulic lithotripsy device 200 may penetrate relatively stably and reliably into, for example, a jaw 601 of an endoscope 6. The distal end 101 of the wire body may be first made to protrude from the distal end of the cannula 11, and then the cannula 11 and the electrode lead 10 for electro-hydraulic lithotripsy may be pushed in the jaw 601. The sleeve 11 may then be retracted proximally a further distance and the sleeve 11 pushed so that the distal end 101 of the wire body protrudes from the endoscope 6 and the proximal end of the electrode lead 10 for the electro-hydraulic lithotripsy may be kept outside.

According to the hydroelectric lithotripsy device provided by the embodiment of the disclosure, through the sleeve, the strength of the electrode wire for hydroelectric lithotripsy can be enhanced, so that the electrode wire for hydroelectric lithotripsy is not easy to break. The hydraulic and electric lithotripter has good pushing performance, can reliably extend into the instrument, and can reliably bring the far end close to the stone to be crushed.

As shown in fig. 4, the sleeve 11 is adapted to be threaded through a jaw 601 of the endoscope 6. The insertion portion 8 of the endoscope 6 may include a rigid tube section 81 and a controllable bend tube section 82. Controllable bend section 82 may be located at the distal end of hard tube section 81. The insertion portion 8 may include a distal end face 821 of the endoscopic insertion portion. The electro-hydraulic lithotripsy device 200 also includes an electrode connector 20 and a transition connector 12. The electrode tab 20 is fixedly connected to the proximal end of the electrode lead 10 for the electrohydraulic lithotripsy.

Illustratively, the transition joint 12 may form the sleeve assembly 9 with the sleeve 11. A transition joint 12 may be affixed to the proximal end of the cannula 11. The transition joint 12 may include a distal end 122 of the transition joint and a proximal end 121 of the transition joint. The proximal end 121 of the transition joint may be removably coupled to the electrode joint distal end 202 of the electrode joint 20. The endoscope 6 includes an insertion portion 8 and a tube joint 7. Located at the proximal end of the insertion portion 8 is a tube fitting 7, the tube fitting 7 including a tube fitting proximal end 701. The distal end 122 of the transition joint may be removably coupled to the endoscope 6, such as by removably coupling the distal end 122 of the transition joint to the proximal end 701 of the coupler.

Illustratively, the transition joint 12 includes a one-way locking ring. The proximal end 121 of the transition joint may be configured to include a one-way locking ring, for example. The one-way locking ring is used for locking the electrode wire 10 for the electrohydraulic lithotripsy so that the electrode wire 10 for the electrohydraulic lithotripsy and the sleeve 11 are relatively fixed in the extending direction.

Illustratively, the coupling proximal end 701 may be configured as one of a luer male or luer female, and the electrode coupling distal end 202 may be configured as the other, both of which may be in sealed connection.

Illustratively, the coupling proximal end 701 may be configured as one of a luer male or luer female, and the distal end 122 of the transition coupling may be configured as the other, both of which may be in a sealed connection. The proximal end 121 of the transition joint may be configured as one of a luer male or luer female, and the distal end 202 of the electrode joint may be configured as the other, both of which may be in sealed connection.

In the exemplary embodiment, sleeve 11 includes a first set of graduations 14. The first set of graduations 14 is used to indicate the depth of penetration of the cannula 11 into the jaw 601. The electrode wire 10 for electro-hydraulic lithotripsy comprises a second set of graduation marks 13. The second set of graduation marks 13 is used for indicating the depth of the electrode lead 10 for the liquid electric lithotripsy extending into the sleeve 11. Illustratively, the first set of graduations 14 includes a first graduation 141, a second graduation 142, and a third graduation 143. The first graduation line 141, the second graduation line 142, and the third graduation line 143 are sequentially disposed from the distal end to the proximal end. In fig. 4, the third graduation marks 143 may be flush with the coupling proximal end 701. The second set of graduations 13 is likewise comprised of a plurality of graduations.

The sleeve 11 is adapted to be threaded through a jaw 601 of the endoscope 6. Since the distance between the first set of graduation marks 14 and the distal end of the sleeve 11 and the distance between the second set of graduation marks 13 and the distal end 101 of the body can be obtained in advance, the position of the distal end 101 of the body relative to the distal end of the endoscope 6, that is, the distal end face 821 of the endoscope insertion portion can be estimated based on the depth indicated by the first set of graduation marks 14 and the depth indicated by the second set of graduation marks. It is presumed that the distal end 101 of the wire body has not yet protruded from the distal end face 821 of the endoscope insertion portion or the distal end 101 of the wire body has protruded from the distal end face 821 of the endoscope insertion portion.

Referring to fig. 6, fig. 6 shows an assembled structure of the electrohydraulic lithotripsy device and an endoscope. As shown in fig. 6, the electrohydraulic lithotripsy apparatus 200 further comprises a power supply 15. The power supply device 15 includes a power supply connector 16, for example.

The power supply device 15 may be electrically connected to the electrode lead 10 for the liquid-electric lithotripsy, for example the power supply connector 16 is electrically connected to the electrode connector 20, which in turn may supply power to the first electrode 1 and the respective second electrode 2. The power supply device 15 is configured to: different combinations of at least two second electrodes 2 are supplied in response to different supply signals. For example, in response to a first power supply signal, power is supplied to the first electrode 1 and one second electrode 2 having the largest resistance; the first electrode 1 and all the second electrodes 2 are supplied with power in response to the second power supply signal.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, which falls within the scope of the utility model as claimed. The scope of the utility model should, therefore, be determined with reference to the appended claims.

Claims (10)

1. An electrode lead for electrohydraulic lithotripsy, comprising:

a first electrode having an extension direction;

an insulator surrounding the first electrode, wherein a distal end of the first electrode is exposed to a distal end of the insulator along the extending direction; and

and at least two second electrodes positioned in the insulator and extending along the extending direction, distal ends of the second electrodes being exposed to distal ends of the insulator, the at least two second electrodes being disposed at intervals from each other.

2. The electrode lead for liquid-electric lithotripsy according to claim 1, wherein the number of the second electrodes is four, and the second electrodes are uniformly arranged along the circumferential direction of the first electrode.

3. The electrode wire for liquid-electric lithotripsy according to claim 1, wherein the insulator comprises a first insulating layer and a second insulating layer, the first electrode, the first insulating layer and the second insulating layer are sequentially arranged from inside to outside, and the second electrode is positioned in the second insulating layer.

4. The electrode lead for electrohydrodynamic lithotripsy of claim 1, wherein at least one of the second electrodes has a cross-sectional area smaller than a cross-sectional area of the first electrode.

5. The electrode lead for liquid-electric lithotripsy according to claim 1, wherein the at least two second electrodes comprise two different cross-sectional areas or two different resistances.

6. The electrode lead for electrohydrodynamic lithotripsy of claim 1, wherein a center of one of the at least two second electrodes is closer to a center of the first electrode than a center of the other.

7. A electrohydraulic lithotripsy device, comprising:

an electrode lead for electrohydraulic lithotripsy according to any one of claims 1 to 6; a kind of electronic device with high-pressure air-conditioning system

And a sleeve sleeved on the electrode wire for the liquid-electricity lithotripsy, wherein the sleeve is shorter than the electrode wire for the liquid-electricity lithotripsy along the extending direction of the electrode wire for the liquid-electricity lithotripsy, and the sleeve can slide relative to the electrode wire for the liquid-electricity lithotripsy.

8. The electrohydraulic lithotripsy device of claim 7 wherein said sleeve is adapted to be threaded through a jaw channel of an endoscope;

the hydroelectric lithotripter also comprises an electrode connector and a transition connector, wherein the electrode connector is fixedly connected to the proximal end of the electrode lead for hydroelectric lithotripter, the transition connector is fixedly connected to the proximal end of the sleeve, the proximal end of the transition connector is detachably connected with the electrode connector, and the distal end of the transition connector is detachably connected with the endoscope.

9. The electrohydraulic lithotripsy device of claim 7 wherein said sleeve is adapted to be threaded through a jaw of an endoscope, said sleeve including a first set of graduations indicating a depth of said sleeve extending into said jaw;

the electrode lead for the liquid electric lithotripsy comprises a second group of scale marks, and the second group of scale marks are used for marking the depth of the electrode lead for the liquid electric lithotripsy extending into the sleeve.

10. The electrohydraulic lithotripsy apparatus of claim 7 further comprising a power supply device electrically connected to said electrohydraulic lithotripsy electrode wire, said power supply device configured to: different combinations of the at least two second electrodes are powered in response to different power supply signals.

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