A kind of liquid-electric and basket combined stone crushing device

Abstract

The utility model provides a kind of liquid electricity and net basket combined's gravel device, including handle fixed end, handle mobile end is moved along handle fixed end axial direction, handle fixed end is equipped with injection port, handle fixed end front end is provided with outer tube, outer tube is double-cavity pipe and is respectively net basket passage and liquid electricity passage;Net basket passage inside is provided with wire, wire one end is connected handle mobile end, other end is connected net basket body;Liquid electricity passage inside is equipped with liquid electricity lithotripsy catheter, liquid electricity lithotripsy catheter one end is connected with liquid electricity lithotripsy instrument, other end is connected liquid electricity lithotripsy electrode, liquid electricity lithotripsy electrode is located in liquid electricity passage, injection port is communicated with net basket passage, liquid electricity passage is located in the bottom of outer tube, handle fixed end rear end is provided with sealing device, liquid electricity passage rear end is connected with handle fixed end plugging, net basket body is coated with insulating layer.The utility model satisfies the liquid electricity lithotripsy and stone extraction function of calculus simultaneously, significantly reduce the frequency of instrument exchange, safe and effective, shorten operation time;Double-channel structure not only can avoid electrode discharge injury biliary tract, simultaneously, after net basket body set stone, stone is more fixed, energy loss is small, gravel efficiency is higher, and stone in net basket body, will not produce a large number of escape, improve stone extraction efficiency to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a lithotripsy device that combines hydraulic electrolysis with a basket. Background Technology

[0002] In my country's surgical disease classification, biliary stones have a high incidence rate, with millions of new patients each year. Biliary stones cause significant suffering for patients. Endoscopic retrograde cholangiopancreatography (ERCP) is performed through natural orifices, offering advantages such as minimal trauma and rapid recovery, making it particularly suitable for elderly patients or those with underlying medical conditions. Routine ERCP procedures use stone retrieval baskets or balloons to remove stones from the common bile duct. However, in difficult cases involving large stones (≥2cm in diameter), impacted intrahepatic bile duct stones, or concomitant bile duct strictures, where stone fragmentation baskets are insufficient, electrohydraulic lithotripsy combined with direct visualization under a choledochoscope is necessary to improve the success rate of treating difficult stones. Electrohydraulic lithotripsy uses electrohydraulic shock waves to instantly pulverize hard stones, achieving higher efficiency than traditional mechanical lithotripsy. However, it requires specialized endoscopes, presenting a high technical barrier, and necessitates the use of stone retrieval instruments after fragmentation to remove the fragmented stones, resulting in low stone retrieval efficiency and a longer operation time, increasing the burden on both doctors and patients.

[0003] In response to the above situation, it is necessary to design a lithotripsy device that combines electrohydraulic and retrieval baskets. When performing lithotripsy on the retrieved stones, the stones can be directly retrieved using the retrieval basket without repeatedly inserting lithotripsy guide wires and stone retrieval baskets, reducing instrument exchanges, shortening operation time, and eliminating the need for cholangiopancreatography (CPAP) endoscopy, thus reducing costs and lowering technical difficulty. Utility Model Content

[0004] The purpose of this invention is to provide a lithotripsy device that combines electrohydraulic and basket-based methods, simultaneously satisfying the functions of electrohydraulic lithotripsy and stone retrieval. This significantly reduces the number of instrument exchanges, is safe and effective, and shortens the operation time. The dual-channel structure not only avoids damage to the bile duct during electrode discharge, but also ensures that the stone is relatively fixed after being scooped up by the basket, resulting in less energy loss and higher lithotripsy efficiency. Furthermore, the stone does not escape in large quantities within the basket, which further improves the stone retrieval efficiency to a certain extent.

[0005] According to one aspect of this utility model, a combined hydraulic-electric and basket-type lithotripsy device is provided, comprising a handle fixed end and a handle movable end that moves axially along the handle fixed end. The handle fixed end is provided with a liquid injection port, and an outer tube is provided at the front end of the handle fixed end. The outer tube is a double-lumen tube, which is respectively a basket channel and a hydraulic-electric channel. A metal wire is provided inside the basket channel, one end of which is connected to the handle movable end, and the other end is connected to the basket body. A hydraulic-electric lithotripsy conduit is provided inside the hydraulic-electric channel. One end of the hydraulic-electric lithotripsy conduit is connected to the hydraulic-electric lithotripter, and the other end is connected to the hydraulic-electric lithotripsy electrode, which is located inside the hydraulic-electric channel. The liquid injection port communicates with the basket channel. The hydraulic-electric channel is located at the bottom of the outer tube. A sealing device is provided at the rear end of the handle fixed end, and the rear end of the hydraulic-electric channel is sealed to the handle fixed end. The basket body is coated with an insulating layer.

[0006] Preferably, it further includes a liquid-liquid-electric channel interface, which communicates with the liquid-electric channel, and the liquid-electric lithotripsy conduit is connected to the liquid-electric lithotripter through the liquid-electric channel interface.

[0007] Preferably, the rear end of the electrohydraulic channel is sealed and connected to the handle fixing end by light-curing adhesive.

[0008] Preferably, the sealing device is a sealing ring.

[0009] Preferably, the outer diameter of the outer tube is 2.5-3.5 mm, the inner diameter of the basket channel is 1-1.5 mm, and the inner diameter of the electrohydraulic channel is 1-1.2 mm.

[0010] Preferably, the outer tube is a plastic tube.

[0011] Preferably, the basket body is diamond-shaped and composed of four, six, or eight metal wires.

[0012] This invention simultaneously satisfies the functions of electrohydraulic lithotripsy and stone retrieval, significantly reducing the number of instrument exchanges, ensuring safety and effectiveness, shortening operation time, and eliminating the need for a cholangiopancreatography endoscope, thus reducing costs and technical difficulty; the basket body is coated with an insulating layer to prevent the basket body from being electrified and damaging tissue when the electrohydraulic lithotripsy electrodes discharge to break the stone. Attached Figure Description

[0013] Figure 1 A schematic diagram of a rock-crushing device combining electrohydraulic and net basket components;

[0014] Figure 2 This is a schematic diagram of the cross-section of the outer tube. Detailed Implementation

[0015] To facilitate understanding of this application and to make the aforementioned objectives, features, and advantages of this application more apparent, a detailed description of specific embodiments of this application is provided below in conjunction with the accompanying drawings. Numerous specific details are set forth in the following description to provide a thorough understanding of this application, and preferred embodiments are shown in the accompanying drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. This application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can also refer to the internal connection between two components.

[0019] For ease of description, in this instruction manual, the end of the outer tube furthest from the operator during use is defined as the far end, or front end, while the end held by the operator is defined as the near end, or rear end.

[0020] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-2As shown, the combined hydraulic-electric and basket lithotripsy device of this embodiment includes a handle fixing end 1, a handle moving end 2 that moves axially along the handle fixing end 1, and a hydraulic-electric channel interface 10. The handle fixing end 1 is provided with a liquid injection port 11, and an outer tube 3 is provided at the front end of the handle fixing end 1. The outer tube 3 is a double-lumen tube and is respectively a basket channel 31 and a hydraulic-electric channel 32. A metal wire 4 is provided inside the basket channel 31. One end of the metal wire 4 is connected to the handle moving end 2, and the other end is connected to the basket body 5. A hydraulic-electric lithotripsy conduit 7 is provided inside the hydraulic-electric channel 32. One end of the hydraulic-electric lithotripsy conduit 7 is connected to the hydraulic-electric lithotripter 8, and the other end is connected to the hydraulic-electric lithotripsy electrode 9. The hydraulic-electric lithotripsy electrode 9 is located inside the hydraulic-electric channel 32. The liquid injection port 12 is connected to the basket channel. The electrohydraulic channel 32 is located at the bottom of the outer tube 3, ensuring that the electrohydraulic lithotripsy electrode 9 is positioned at the bottom of the outer tube 3 when it extends out. The electrohydraulic lithotripsy electrode 9 can accurately act on the bottom of the stone without the need for direct visualization under a cholangiopancreatography endoscope, thus reducing the technical difficulty to some extent. A sealing device 6 is provided at the rear end of the handle fixing end 1 to prevent the liquid injected from the injection port 12 from flowing out through the handle fixing end 1. The rear end of the electrohydraulic channel 32 is sealed to the handle fixing end 1 to prevent the liquid injected from the injection port 12 from flowing into the electrohydraulic channel 32 through the handle fixing end 1. The basket body 5 is coated with an insulating layer to prevent the basket body from being electrified and damaging tissue when the electrohydraulic lithotripsy electrode discharges and breaks up the stone.

[0022] During ERCP stone removal, this device enters the bile duct through a duodenoscope. Under X-ray guidance, the basket body 5 extends from the basket channel 31 and retrieves the stone. When encountering a large stone, the electrohydraulic lithotripsy catheter 7 extends from the outer tube 3. Guided by the electrohydraulic channel 32, the electrohydraulic lithotripsy electrode 9 at the tip of the catheter 7 presses against the bottom of the stone. The underwater electrohydraulic lithotripsy electrode 9 generates a shock wave through instantaneous high-voltage discharge, using the electrohydraulic effect to break the stone. The dual-channel structure of this invention not only avoids damage to the bile duct during electrode discharge, but also ensures that the stone is relatively fixed after being retrieved by the basket body 5, resulting in less energy loss and higher stone fragmentation efficiency. Furthermore, the stone does not escape significantly within the basket body 5, further improving stone retrieval efficiency. Since the electrohydraulic channel 32 is located at the bottom of the outer tube 3, the electrohydraulic lithotripsy electrode 9 can accurately act on the bottom of the stone, eliminating the need for direct visualization with a cholangiopancreatoscope and reducing technical difficulty.

[0023] Specifically, the electrohydraulic channel interface 10 communicates with the electrohydraulic channel 32, and the electrohydraulic lithotripsy conduit 7 is connected to the electrohydraulic lithotripter through the electrohydraulic channel interface 10. The rear end of the electrohydraulic channel 32 is sealed to the handle fixing end 1 with light-curing adhesive. The sealing device 6 is a sealing ring. The handle fixing end 1 is provided with a liquid injection port 12 and a sealing device 6. The liquid injection port 12 communicates with the basket channel 31, and liquid can be injected into the basket channel 31 through the liquid injection port 12 until it flows out from the distal end of the outer tube 3. The outer tube 3 is a double-lumen tube with an outer diameter of 2.5-3.5 mm. It is made of plastic tubing, preferably PTFE. The inner diameter of the basket channel 31 is 1-1.5 mm, and the inner diameter of the electrohydraulic channel 32 is 1-1.2 mm, allowing the electrohydraulic lithotripsy conduit 7 to pass smoothly. The basket body 5 is a diamond-shaped or other shaped structure composed of four, six, or eight metal wires.

[0024] This device is inserted into the bile duct via a duodenoscope. Under X-ray guidance, the movable end 2 of the manipulator captures large stones. Pulling the movable end 2 backward tightens the basket body 5, bringing the stone closer to the outer tube 3. The electrohydraulic lithotripsy catheter 7 is manipulated so that the electrohydraulic lithotripsy electrode 9 at the front end presses against the stone. At this point, it is necessary to ensure that the bile duct is filled with fluid through the injection port 12. Then, stone fragmentation is performed according to the discharge voltage and pulse frequency set by the electrohydraulic lithotripter. After stone fragmentation, the basket body 5 is used to grab stone fragments, or fluid is injected through the injection port 12 to flush out small stone particles with physiological saline.

[0025] This utility model solution simultaneously satisfies the functions of electrohydraulic lithotripsy and stone retrieval, significantly reducing the number of instrument exchanges, ensuring safety and effectiveness, and shortening the operation time. The dual-channel structure not only avoids damage to the bile duct during electrode discharge, but also ensures that the stone is relatively fixed after the 5-piece basket body is used to retrieve the stone, resulting in less energy loss and higher stone fragmentation efficiency. Furthermore, the stone will not escape in large quantities within the 5-piece basket body, which improves the stone retrieval efficiency to a certain extent.

[0026] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the invention. Therefore, it is intended that this invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A stone crushing device combining hydraulic and electrohydraulic and net basket components, comprising a handle fixed end (1) and a handle movable end (2) that moves axially along the handle fixed end (1), wherein the handle fixed end (1) is provided with a liquid injection port (11), and an outer tube (3) is provided at the front end of the handle fixed end (1), wherein the outer tube (3) is a double-lumen tube and is respectively a net basket channel (31) and a hydraulic channel (32); wherein a metal wire (4) is provided inside the net basket channel (31), one end of the metal wire (4) is connected to the handle movable end (2), and the other end is connected to the net basket body (5); The electrohydraulic channel (32) is equipped with an electrohydraulic lithotripsy conduit (7), one end of which is connected to the electrohydraulic lithotripter (8), and the other end is connected to the electrohydraulic lithotripsy electrode (9). The electrohydraulic lithotripsy electrode is located inside the electrohydraulic channel (32). The injection port (11) is connected to the basket channel (31). The feature is that... The hydraulic-electric channel (32) is located at the bottom of the outer tube (3), and a sealing device (6) is provided at the rear end of the handle fixing end (1). The rear end of the hydraulic-electric channel (32) is sealed and connected to the handle fixing end (1). The basket body (5) is coated with an insulating layer.

2. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: It also includes a liquid-liquid-electric channel interface (10), which is connected to the liquid-electric channel (32), and the liquid-electric lithotripsy conduit (7) is connected to the liquid-electric lithotripter through the liquid-electric channel interface (10).

3. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: The rear end of the electrohydraulic channel (32) is connected to the handle fixing end (1) by a light-curing adhesive.

4. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: The sealing device (6) is a sealing ring.

5. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: The outer diameter of the outer tube (3) is 2.5-3.5 mm, the inner diameter of the basket channel (31) is 1-1.5 mm, and the inner diameter of the hydraulic channel (32) is 1-1.2 mm.

6. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: The outer tube (3) is a plastic tube.

7. The rock-crushing device combining electrohydraulic and wire basket technology as described in claim 1, characterized in that: The basket body (5) is diamond-shaped and composed of four, six or eight metal wires.

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