Coaxial energy-gathering lithotripsy electrode and lithotripsy device

Abstract

The utility model discloses a coaxial energy-gathered lithotripsy electrode and lithotripsy device, the coaxial energy-gathered lithotripsy electrode comprises an electrode wire, the electrode wire comprises a positive wire, a first insulating layer and a negative wire, the positive wire and the negative wire are coaxially arranged, and the first insulating layer is arranged between the positive wire and the negative wire; the electrode wire is provided with a stretching-in section, the positive electrode wire, the first insulating layer and the negative electrode wire penetrate through the stretching-in section, and an energy gathering piece is arranged at the end of the stretching-in section and arranged outside the negative electrode wire; the extending section is used for extending into a biopsy channel of an endoscope. According to the lithotripsy device, when the electrode wire is used for crushing and discharging the calculus in the body, the electrode wire can generate relatively concentrated discharge sparks at the discharge port, so that the shock wave energy is more concentrated, the large calculus can be crushed into the small calculus which is relatively easy to take out, and the lithotripsy efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables used in medical equipment, in particular to a coaxial energy-focusing lithotripsy electrode and a lithotripsy device. Background Art

[0002] Stones in the human body are commonly found in the gallbladder, kidneys, bladder and other parts. The causes of stones are complex and will seriously threaten people's health if not treated in time. Commonly used endoscopic lithotripters are devices that directly introduce lithotripsy energy into the body through the inspection channels of endoscopes such as fiber choledochoscopes, rigid cholecystoscopes, duodenoscopes, gastroscopes, cystoscopes, ureteroscopes, and percutaneous nephroscopes, and release shock wave energy on the surface of stones to break the stones. The shock wave energy needs to be directed through the discharge between the positive and negative electrodes of the lithotripsy electrode wire for conduction.

[0003] Most of the existing electrode wires are coaxial structures with positive and negative electrodes or side-by-side structures with positive and negative electrodes. The rigidity of the electrodes in these two structures is weak, which makes the discharge sparks generated by the electrode wire at the discharge port present an irregular fan-shaped discharge spark, and the released energy is dispersed in different directions. If such energy is only used to break ordinary stones, it is not a problem. However, when encountering large and hard stones, the surgical effect is relatively poor, and the stone crushing efficiency will inevitably be reduced to varying degrees. In addition, the energy of the electrode wire during discharge is directed in different directions, which is also easy to damage the human gallbladder wall next to the stone, causing discomfort after surgery.

[0004] Therefore, there is an urgent need for a coaxial energy-focusing lithotripsy electrode and a lithotripsy device to overcome the above-mentioned defects. Utility Model Content

[0005] In order to overcome at least one of the defects of the prior art described above, one of the purposes of the utility model is to provide a coaxial energy-focusing lithotripsy electrode, whose electrode wire can generate relatively concentrated discharge sparks at the discharge port, so that the shock wave energy is more concentrated.

[0006] The second purpose of the utility model is to provide a lithotripsy device, wherein when the electrode wire is used to crush and discharge stones in the body, the electrode wire can generate relatively concentrated discharge sparks at the discharge port, so that the shock wave energy is more concentrated and the lithotripsy efficiency is improved.

[0007] One of the technical solutions adopted by the utility model to solve the problem is:

[0008] A coaxial energy-focusing lithotripsy electrode comprises an electrode wire, wherein the electrode wire comprises a positive electrode wire, a first insulating layer and a negative electrode wire, wherein the positive electrode wire and the negative electrode wire are coaxially arranged, and the first insulating layer is arranged between the positive electrode wire and the negative electrode wire; the electrode wire has an insertion section, wherein the positive electrode wire, the first insulating layer and the negative electrode wire pass through the insertion section, and an energy-focusing piece is arranged at the end of the insertion section, and the energy-focusing piece is arranged outside the negative electrode wire; the insertion section is used for inserting into a biopsy channel of an endoscope.

[0009] Furthermore, the electrode wire also includes an operating section, which is arranged at one end of the extension section away from the energy gathering member, and the positive electrode wire, the first insulating layer and the negative electrode wire pass through the operating section; the operating section is used for human hand holding and operation.

[0010] Furthermore, the extension section includes a first extension section and a second extension section, the second extension section connects the operating section and the first extension section, and the energy gathering piece is arranged on the first extension section; the operating section and the second extension section are both provided with a second insulating layer, and the second insulating layer is sleeved outside the negative electrode wire.

[0011] Furthermore, the length of the energy concentrating member is L, and the value range of L is L≥5 mm.

[0012] Furthermore, the energy concentrating member is a metal cap, and the metal cap is sleeved on the outer periphery of the negative electrode wire.

[0013] Furthermore, the outer diameter of the extending section is D, and the value range of D is D≤1.0 mm.

[0014] Furthermore, the outer diameter of the electrode wire is D, and the value range of D is D≤1.0 mm; the operating section is provided with a reinforcing sheath, and the reinforcing sheath is arranged outside the second insulating layer.

[0015] Furthermore, it comprises a connector, and the connector is used to connect the electrode wire and the shock wave generator.

[0016] Furthermore, it comprises a buffer sleeve, one end of which is connected to the connector, and the other end of which extends toward the end of the insertion section and is sleeved on the outer circumference of the operating section.

[0017] The second technical solution adopted by the utility model to solve the problem is:

[0018] A lithotripsy device comprises a shock wave generator and the coaxial energy-focused lithotripsy electrode as described above, wherein the shock wave generator is used to output a shock wave signal to the coaxial energy-focused lithotripsy electrode.

[0019] In summary, the coaxial energy-focusing lithotripsy electrode and lithotripsy device provided by the utility model have the following technical effects:

[0020] 1) The electrode wire adopts a positive and negative coaxial structure, which can reduce the outer diameter of the electrode wire. The discharge end of the electrode wire is provided with an energy concentrator, which can enhance the strength of the discharge end, improve the durability of the electrode wire, and improve the passability of the electrode wire in the biopsy channel;

[0021] 2) The energy concentrator is sleeved on the outer periphery of the negative electrode wire, and the energy concentrator and the negative electrode wire act as the negative electrode, and the positive electrode wire is usually the positive electrode. By discharging the positive and negative electrodes together, the consistency of discharge can be improved and the discharge can be made more uniform, thereby concentrating the energy more. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a coaxial energy-focusing lithotripsy electrode according to an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of the electrode wire according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the axial end surface of the first connecting section of the electrode wire according to an embodiment of the present utility model.

[0025] The meanings of the reference numerals are as follows:

[0026] 1. Electrode wire; 11. Insertion section; 12. Operation section; 13. Positive conductor; 14. First insulating layer; 15. Negative conductor; 16. Energy concentrator; 17. Second insulating layer; 19. Reinforced sheath; 2. Connector; 3. Buffer sheath. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Embodiment 1

[0031] See also Figure 1 The utility model discloses a coaxial energy-gathering lithotripsy electrode, which includes an electrode wire 1. Specifically, the electrode wire 1 includes a positive electrode wire 13, a first insulating layer 14 and a negative electrode wire 15; Figure 2 and Figure 3 The positive lead 13 and the negative lead 15 are coaxially arranged, and the first insulating layer 14 is arranged between the positive lead 13 and the negative lead 15. The electrode wire 1 has an insertion section 11, and the insertion section 11 is used to extend into the biopsy channel of the endoscope; see Figure 2 The positive electrode wire 13 , the first insulating layer 14 and the negative electrode wire 15 penetrate the extending section 11 , wherein an energy concentrator 16 is provided at the end of the extending section 11 , and the energy concentrator 16 is arranged outside the negative electrode wire 15 .

[0032] On the basis of this structure, when using the coaxial energy-focusing lithotripsy electrode of the utility model, the endoscope of the endoscope can be first inserted into the human body through the human mouth, and then the stone can be found under the endoscope, and then the insertion section 11 of the electrode wire 1 can be manipulated to reach the vicinity of the stone through the biopsy channel of the endoscope, and then the end of the insertion section 11 is extended 10mm-15mm out of the exit of the biopsy channel and close to the target stone, and a shock wave signal is output to the electrode wire 1 through the shock wave generator in the lithotripsy host, so that the discharge port of the electrode wire 1 generates a discharge spark, and the shock wave energy acts on the stone and then crushes the stone.

[0033] The endoscope has a narrow and long channel in the endoscope, and the channel forms a biopsy channel. The endoscope can be a fiber choledochoscope, a hard cholecystoscope, a duodenoscope, a gastroscope, a cystoscope, a ureteroscope, a percutaneous nephroscope, or the like.

[0034] It should be noted that the lithotripsy electrode wire 1 is used to discharge large stones to crush them so that the stone removal basket can grab the broken stones. However, in order to smoothly pass through the narrow biopsy channel in the endoscope, the outer diameter of the conventional electrode wire 1 is set to be relatively small, and the length of the electrode wire 1 is relatively long, which results in the electrode wire 1 being weak at the discharge port. When crushing the stones, the discharge sparks generated by the discharge port of the electrode wire 1 present an irregular fan-shaped discharge spark, and the released energy is dispersed in different directions. When such energy is used to crush large and hard stones, the surgical effect is relatively poor, and the lithotripsy efficiency is bound to be reduced to varying degrees. In addition, the energy of the electrode wire during discharge is directed in different directions, which can easily damage the human gallbladder wall next to the stone, causing discomfort after surgery.

[0035] In order to improve the passability of the electrode wire 1 in the biopsy channel of the endoscope and the strength of the discharge end, the present application sets the positive and negative electrodes of the electrode wire 1 coaxially. Specifically, the positive wire 13 is set at the center of the electrode wire, and the first insulating layer 14 is wrapped around the outer periphery of the positive wire 13; the negative wire 15 is wound around the outer periphery of the first insulating layer 14 to form a cylindrical shape, and the energy concentrator 16 is sleeved on the outer periphery of the negative wire 15 at the end of the insertion section 11. In this way, the outer diameter of the electrode wire 1 can be made smaller, which facilitates the insertion section 11 to be inserted into the biopsy channel of the endoscope.

[0036] When in use, the end of the extending section 11 provided with the energy concentrator 16 forms the discharge end of the electrode line 1. When discharging, the energy concentrator 16 and the negative electrode wire 15 act as the negative electrode, and the positive electrode wire 13 acts as the positive electrode.

[0037] In this way, the strength of the discharge end can be enhanced without increasing the overall outer diameter of the electrode wire 1. Since the overall outer diameter of the electrode wire 1 is small, the passability of the electrode wire 1 in the biopsy channel of the endoscope is high. Because the strength of the discharge end of the electrode wire 1 is enhanced, the electrode wire 1 can generate a discharge spark with a consistent discharge direction at the discharge port, so that the discharge energy is more concentrated, and sufficient energy is released to crush the solid stones, thereby improving the efficiency of stone crushing; and because the energy is concentrated toward the stones, it is not easy to cause damage to the human gallbladder wall next to the stones. In addition, the energy concentrating member 16 enhances the local strength of the electrode wire 1, which is beneficial to prolonging the service life of the electrode wire 1.

[0038] Among them, the first insulating layer 14 is used to insulate the positive wire 13 and the negative wire 15 to prevent the positive wire 13 and the negative wire 15 from directly contacting each other and causing a short circuit. In addition, the positive wire 13 and the negative wire 15 are both made of alloy wires. Specifically, the alloy wires are made of a precious metal alloy material with high conductivity, and can be made of silver-plated copper material. It has high conductivity and low impedance, which can reduce the self-loss of the electrode wire 1, and can achieve the crushing of stones with less energy, ensuring the safety and reliability of the product. At the same time, it also has a certain toughness and is not easy to break when bent and used.

[0039] Since the discharge process of the shock wave generator is high-voltage instantaneous discharge, the electrical performance requirements of the electrode wire 1 must withstand high voltage, and the positive wire 13 and the negative wire 15 made of alloy wire can withstand high voltage DC 4000V / 1minute, which can meet the use requirements.

[0040] Furthermore, the electrode wire 1 also includes an operating section 12. Specifically, the operating section 12 is arranged at the end of the extension section 11 away from the energy concentrator 16, and the positive wire 13, the first insulating layer 14 and the negative wire 15 pass through the operating section 12; the operating section 12 is used for human hand operation.

[0041] Based on this structure, the operator can hold the operating section 12, control the insertion section 11 to enter or exit the biopsy channel, and adjust the insertion depth of the insertion section 11. Specifically, under the guidance of the endoscope, the electrode wire 1 connected to the lithotripter host is sent to the common bile duct through the biopsy channel of the endoscope, and the angle position of the end of the electrode wire 1 is adjusted by holding the operating section 12 and approaching the center of the stone to perform liquid-electric shock wave lithotripsy, and then the stone removal basket can be used to remove the broken stones. Repeating this process several times can improve the one-time removal rate of common bile duct stones.

[0042] Furthermore, the extension section 11 includes a first extension section 11 and a second extension section 11, and the second extension section 11 connects the operating section 12 and the first extension section 11. The energy concentrator 16 is disposed on the first extension section 11; and the operating section 12 and the second extension section 11 are both provided with a second insulating layer 17, and the second insulating layer 17 is sleeved outside the negative electrode wire 15.

[0043] When the electrode wire 1 is used for lithotripsy in the body, after the insertion section 11 is inserted into the biopsy channel of the endoscope, the first insertion section 11 extends out from the exit of the biopsy channel of the endoscope and approaches the stone. Therefore, the energy concentrator 16 is arranged on the first insertion section 11. The electrode wire 1 can release energy toward the stone through the positive conductor 13 at the first insertion section 11 and the energy concentrator 16, and the stone can be easily crushed.

[0044] Since the first extension section 11 serves as the discharge end, the energy concentrator 16 of the first extension section 11 and the outer periphery of the negative electrode conductor 15 are not provided with the second insulating layer 17 to prevent the second insulating layer 17 from being damaged by the high temperature generated by the high-voltage pulse discharge.

[0045] It is understandable that the second insulating layer 17 is sleeved outside the negative lead 15 of the operating section 12, and the outer periphery of the operating section 12 can be insulated so that the operator can hold the operating section 12 for manipulation. It should be noted that the second insulating layer 17 is sleeved outside the negative lead 15 of the second insertion section 11, and can prevent the negative lead 15 of the second insertion section 11 from directly contacting the inner wall of the bile duct when the second insertion section 11 is extended through the exit of the biopsy channel, thereby causing the lithotripsy energy to injure the bile duct wall.

[0046] Specifically, the first insulating layer 14 and the second insulating layer 17 can both be conventional insulating layers. Specifically, the first insulating layer 14 and the second insulating layer 17 can be polyimide films, polyvinyl chloride insulating layers, rubber insulating layers made of silicone rubber, etc. in the prior art, which have good toughness and better insulating effect, and can ensure the flexibility of the electrode line 1.

[0047] Furthermore, the length of the energy concentrator 16 is L, see Figure 2 , and the value range of L is L≥5mm.

[0048] Specifically, the energy gathering member 16 is arranged on the outer periphery of the end of the first extension section 11 away from the operating section 12, and the outer periphery of other parts of the first extension section 11 where the energy gathering member 16 is not provided is provided with a second insulating layer 17, and the second insulating layer 17 is wrapped around the outside of the negative electrode wire 15; the energy gathering member 16 can directly contact the liquid medium, thereby improving the discharge efficiency.

[0049] It should be noted that the first extension segment 11 is a segment of the electrode wire 1 extending from the outlet of the biopsy channel of the endoscope, and the length of the segment is 10mm-15mm, which can ensure that the first extension segment 11 contacts the part where the lithotripsy is required and avoid the interference of the endoscope on the operation of the electrode wire 1. After the first extension segment 11 extends out of the biopsy channel of the endoscope, the first extension segment 11 loses the support of the wall of the biopsy channel, resulting in insufficient strength. Therefore, when the setting length L of the energy concentrator 16 is not less than 5mm, the overall strength of the first extension segment 11 can be enhanced.

[0050] In addition, the longer the energy concentrator 16 is set, the larger the connection area between the electrode wire 1 and the energy concentrator 16 is, so the connection strength between the electrode wire 1 and the energy concentrator 16 is stronger, and the energy concentrator 16 has a better effect of enhancing the strength of the discharge end of the electrode wire 1, thereby making the discharge sparks emitted from the discharge port of the electrode wire 1 more concentrated, and the electrode wire 1 has sufficient energy to crush hard stones.

[0051] Furthermore, the energy concentrator 16 is a metal cap, and the metal cap is sleeved on the outer circumference of the negative electrode wire 15 .

[0052] Specifically, the metal cap can be a nickel-titanium alloy cap or a silver-plated copper alloy cap, which has the characteristics of high conductivity and low impedance. Specifically, the metal cap is a hollow cylindrical structure; the metal cap is sleeved on the outer periphery of the negative electrode wire 15 through the hollow inner wall, and a glue layer is provided between the hollow inner wall of the metal cap and the negative electrode wire 15, so that the metal cap and the negative electrode wire 15 are bonded and connected.

[0053] Among them, after the metal cap is glued to the negative electrode wire 15, heat and pressure are applied to the metal cap and the negative electrode wire 15 at a certain temperature and pressure, so that the connection strength between the metal cap and the negative electrode wire 15 is further enhanced, thereby enhancing the strength of the discharge end of the electrode wire 1, so that the discharge port of the electrode wire 1 can gather energy during discharge.

[0054] In addition, the energy concentrator 16 can also be an alloy block, specifically a nickel-titanium alloy block, which is arranged on one side of the negative electrode wire 15, and does not cover the outer periphery of the negative electrode wire 15, and can also achieve the effect of enhancing the discharge end of the electrode wire 1. The energy concentrator 16 is preferably a nickel-titanium alloy cap sleeved on the outer periphery of the negative electrode wire 15, which can evenly enhance the strength of the discharge end of the electrode wire 1 along the circumferential direction, making the discharge more uniform.

[0055] Furthermore, the outer diameter of the extending section 11 is D, and the value range of D is D≤1.0 mm.

[0056] That is, the outer diameter of the first extension section 11 and the second extension section 11 is no more than 1.0 mm, so that the electrode wire 1 of the utility model can enter the human body through the biopsy channel in the direct-viewing duodenoscope, find the target stone through the direct-viewing duodenoscope, and crush the stone through the discharge of the end of the electrode wire 1, thereby achieving the technical effect of in vivo lithotripsy without trauma to the body surface.

[0057] It should be noted that the inner diameter of the biopsy channel in the direct-view duodenoscope is 1.2 mm. The conventional electrode wire 1 cannot enter the biopsy channel of the duodenoscope because its outer diameter exceeds 1.2 mm. It can only be crushed by a choledochoscope, and will cause trauma on the body surface during lithotripsy. The electrode wire 1 of the present application is compatible with the characteristics of a small outer diameter and a strong discharge end strength, and can be smoothly extended into the biopsy channel of the direct-view duodenoscope. After finding the target stone through the direct-view duodenoscope, the stone is crushed, thereby improving the efficiency of the operation.

[0058] Among them, since the outer diameter of the insertion section 11 does not exceed 1.0 mm, after the electrode wire 1 is inserted into the biopsy channel in the direct-viewing duodenoscope, it can still leave a sufficient channel in the biopsy channel, which will not affect the injection of physiological saline or contrast agent, and will not affect the operation of the adsorption pump, and can improve the one-time stone removal rate.

[0059] In addition, since the body of the direct-viewing duodenoscope is as long as 2.14 m, the total length of the electrode wire 1 of the present application is not less than 3 m to ensure that the discharge port of the electrode wire 1 can extend out of the exit of the biopsy channel and reach the vicinity of the stone.

[0060] Furthermore, the outer diameter of the electrode wire 1 is D, and the value range of D is D≤1.0 mm; wherein a reinforcing sheath 19 is provided on the operating section 12 , and the reinforcing sheath 19 is sleeved outside the second insulating layer 17 .

[0061] In this embodiment, the outer diameters of the insertion section 11 and the operating section 12 of the electrode wire 1 are both no greater than 1.0 mm, and the outer diameters of the electrode wire 1 as a whole are the same, which can ensure the stability of the electrode wire 1 when transmitting current. Since the operating section 12 is the part held by a human hand, and the outer diameter of the operating section 12 is small, it is very easy to break under stress. Therefore, in order to achieve a higher lithotripsy efficiency, the present application adds a reinforcing sheath 19 to the surface of the operating section 12 of the electrode wire 1 that does not enter the biopsy channel, thereby increasing the outer diameter of the local electrode wire 1, improving the toughness and mechanical strength of the electrode wire 1, making it less likely to break under stress, and achieving convenience in operation.

[0062] Specifically, the reinforcing sheath 19 is a hard sleeve made of PVC, CPVC or other materials, and has a hollow cylindrical shape with an inner diameter of not less than 1 mm, so that the hard sleeve can be sleeved outside the electrode wire 1 and can move back and forth on the operating section 12 of the electrode wire 1.

[0063] Among them, a locking structure is provided on the hard sleeve, specifically, the locking structure is a locking bolt, which extends radially along the hard sleeve; a threaded hole is provided on the hard sleeve, and the threaded hole penetrates one side of the hard sleeve along the radial direction of the hard sleeve, and a threaded structure is provided on the locking bolt, which is connected to the threaded hole through the threaded structure, and the locking bolt can be close to or away from the electrode wire 1 in the hard sleeve during the process of being screwed to the threaded hole.

[0064] When in use, the position of the hard sleeve on the operating section 12 can be adjusted first, and then the locking bolt can be turned so that the locking bolt approaches the hard sleeve in the threaded hole along the radial direction and abuts against the electrode wire 1, thereby realizing the relative locking of the hard sleeve and the electrode wire 1. At this time, since the hard sleeve is locked, the hard sleeve will not move when force is applied to the hard sleeve, and the operator can adjust the insertion angle and insertion depth of the insertion section 11 by holding the hard sleeve.

[0065] Especially when the electrode wire 1 is blocked from entering the biopsy channel of the endoscope, adjusting the position of the hard sleeve on the operating section 12 can enhance the axial force of the electrode wire 1, facilitate the back and forth extension of the electrode wire 1, and help the electrode wire 1 pass through the blocked area.

[0066] It should be noted that, since the outer diameters of the positive wire 13 and the negative wire 15 made of alloy wire are relatively small, the overall outer diameter of the electrode wire 1 can be no more than 1.0 mm, so that it can be inserted into the biopsy channel of the duodenoscope. Among them, the impedance of the electrode wire 1 does not exceed 250mΩ / M; since the energy output of the lithotripter host itself is relatively small, and the working part of the electrode wire 1 is relatively long, when the impedance of the electrode wire 1 is relatively small, the efficiency of lithotripsy can be improved.

[0067] Furthermore, the coaxial energy-focused lithotripsy electrode further comprises a connector 2, and the connector 2 is used to connect the electrode line 1 with the shock wave generator.

[0068] Specifically, the connector 2 is provided with a connection plug, and the output energy end of the shock wave generator is provided with a connection socket. The connector 2 is inserted into the connection socket through the connection plug to achieve electrical connection between the connector 2 and the shock wave generator.

[0069] The connector 2 is disposed at the end of the operating section 12 of the electrode wire 1 away from the insertion section 11 , and the current energy output by the shock wave generator can be transmitted to the electrode wire 1 through the connector 2 and discharged and outputted through the end of the electrode wire 1 .

[0070] Furthermore, the coaxial energy-focused lithotripsy electrode further includes a buffer sleeve 3, which is disposed at the connection between the connector 2 and the electrode wire 1; specifically, one end of the buffer sleeve 3 is connected to the connector 2, and the other end of the buffer sleeve 3 extends toward the end of the insertion section 11 and is sleeved on the outer periphery of the operating section 12. In this way, the buffer sleeve 3 can increase the outer diameter of the end of the electrode wire 1 close to the connector 1, so that after the electrode wire 1 is connected to the connector 2, the connection is not easy to be separated or broken.

[0071] Embodiment 2

[0072] Different from the first embodiment, the present embodiment discloses a lithotripsy device, which includes a shock wave generator and the lithotripsy motor assembly in the first embodiment, wherein the shock wave generator is used to output a shock wave signal to the lithotripsy motor assembly.

[0073] Specifically, the coaxial energy-focused lithotripsy electrode includes an electrode wire 1 and a connector 2, and the connector 2 connects the electrode wire 1 and the shock wave generator. When using the lithotripsy device of the utility model, the electrode wire 1 can be inserted into the human body through the biopsy channel of the endoscope, and the target stone can be found and approached under the endoscope, and the shock wave generator is activated to perform high-voltage instantaneous discharge, thereby crushing the stone; then, the small stone is reciprocated through the stone removal basket to achieve the therapeutic effect of removing the stone.

[0074] It should be noted that the present application adopts a liquid-electric shock wave lithotripsy method. Specifically, the micro-explosion and cavitation effect of the low-energy electric pulses output by the shock wave generator in the electrolyte is used to form shock waves to act on the stones, so as to achieve the crushing of large stones.

[0075] The positive lead 13 and the negative lead 15 of the electrode wire 1 are coaxially arranged, thereby reducing the outer diameter of the electrode wire 1 to improve the passability of the electrode wire 1 in the biopsy channel of the endoscope.

[0076] It is worth noting that, in order to improve the strength of the discharge end of the electrode wire 1, the present application sets an energy concentrator 16 at the end of the extension section 11 of the electrode wire 1, and the energy concentrator 16 is set outside the negative wire 15. When the lithotripsy device of the present application is used, when the electrode wire 1 is extended into the body to crush the stone, the positive wire 13 at the center of the electrode wire 1 serves as the positive electrode, and the energy concentrator 16 and the negative wire 15 serve as the negative electrode, and discharge is performed through the positive and negative electrodes.

[0077] Since the energy concentrating member 16 enhances the strength of the discharge end, the discharge port can emit discharge sparks in the same direction, so that the discharge energy is more concentrated, and has sufficient energy to crush solid stones, thereby improving the stone crushing efficiency of the lithotripsy device.

[0078] In addition, the specific structures of the electrode wire 1 and the energy concentrator 16 and the corresponding application process are described in detail in the first embodiment of the present application and will not be elaborated here.

[0079] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A coaxial energy-focusing lithotripsy electrode, characterized in that: The invention comprises an electrode wire (1), wherein the electrode wire (1) comprises a positive electrode wire (13), a first insulating layer (14) and a negative electrode wire (15), wherein the positive electrode wire (13) and the negative electrode wire (15) are coaxially arranged, and the first insulating layer (14) is arranged between the positive electrode wire (13) and the negative electrode wire (15); the electrode wire (1) has an insertion section (11), wherein the positive electrode wire (13), the first insulating layer (14) and the negative electrode wire (15) pass through the insertion section (11), and an energy concentrator (16) is arranged at the end of the insertion section (11), and the energy concentrator (16) is arranged outside the negative electrode wire (15); and the insertion section (11) is used for inserting into a biopsy channel of an endoscope.

2. The coaxial energy-focusing lithotripsy electrode according to claim 1 is characterized in that: The electrode wire (1) further comprises an operating section (12), wherein the operating section (12) is arranged at an end of the insertion section (11) away from the energy concentrator (16), and the positive electrode wire (13), the first insulating layer (14) and the negative electrode wire (15) pass through the operating section (12); the operating section (12) is used for being held and operated by a person.

3. The coaxial energy-focusing lithotripsy electrode according to claim 2 is characterized in that: The insertion section (11) comprises a first insertion section and a second insertion section, the second insertion section connects the operating section (12) and the first insertion section, the energy concentrator (16) is arranged on the first insertion section; the operating section (12) and the second insertion section are both provided with a second insulating layer (17), the second insulating layer (17) is sleeved outside the negative electrode lead (15).

4. The coaxial energy-focusing lithotripsy electrode according to claim 3 is characterized in that: The length of the energy concentrating member (16) is L, and the value range of L is L≥5 mm.

5. The coaxial energy-focusing lithotripsy electrode according to claim 1, characterized in that: The energy concentrator (16) is a metal cap, and the metal cap is sleeved on the outer circumference of the negative electrode lead (15).

6. The coaxial energy-focusing lithotripsy electrode according to any one of claims 1 to 5, characterized in that: The outer diameter of the extending section (11) is D, and the value range of D is D≤1.0 mm.

7. The coaxial energy-focusing lithotripsy electrode according to any one of claims 3 to 4, characterized in that: The outer diameter of the electrode wire (1) is D, and the value range of D is D≤1.0 mm; the operating section (12) is provided with a reinforcing sheath (19), and the reinforcing sheath (19) is sleeved outside the second insulating layer (17).

8. The coaxial energy-focusing lithotripsy electrode according to claim 3, characterized in that: It comprises a connector (2), wherein the connector (2) is used to connect the electrode wire (1) and the shock wave generator.

9. The coaxial energy-focusing lithotripsy electrode according to claim 8, characterized in that: It comprises a buffer sleeve (3), one end of which is connected to the connector (2), and the other end of which extends toward the end of the insertion section (11) and is sleeved on the outer periphery of the operating section (12).

10. A stone crushing device, characterized in that: It comprises a shock wave generator and the coaxial energy-focused lithotripsy electrode according to any one of claims 1 to 9, wherein the shock wave generator is used to output a shock wave signal to the coaxial energy-focused lithotripsy electrode.

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