Electro-hydraulic stone breaking and removing mesh basket device

Abstract

The utility model provides an electro-hydraulic lithotripsy and lithotripsy basket device which comprises a connecting piece and a handle axially moving along the connecting piece, the connecting piece is provided with an electro-hydraulic lithotripsy electrode interface and a water filling nozzle, an outer pipe is arranged at the front end of the connecting piece, an inner pipe coaxial with the outer pipe is arranged in the outer pipe, and an injection cavity is formed between the outer pipe and the inner pipe; a conductor wire is arranged in the inner tube, one end of the conductor wire is connected with one end of the electro-hydraulic lithotripsy electrode interface, and the other end of the conductor wire is connected with an electro-hydraulic lithotripsy electrode which is positioned in the inner tube; one end of the pulling rope is connected with the handle, the other end of the pulling rope is connected with the net basket body, and the sections of the two ends of the net basket body are of circular ring structures. The electrohydraulic lithotripsy and lithotripsy device simultaneously meets electrohydraulic lithotripsy and lithotripsy functions, reduces instrument exchange times, and is safe and effective; the mesh basket and the electrode are coaxially arranged, so that the electrode is easier to align to the calculus for lithotripsy; meanwhile, the mesh basket can be completely retracted into the outer tube, so that the mesh basket is prevented from being damaged when penetrating into the endoscope, and the electrode alignment is not hindered when the calculus is not extracted and broken.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a hydraulic-electric lithotripsy and stone retrieval basket device. Background Technology

[0002] In my country's surgical disease classification, biliary stones have a high incidence rate, with millions of new patients each year, causing significant suffering. Currently, biliary stone removal often requires a combination of choledochoscopy and lithotripsy. The specific procedure involves: the lithotripsy guidewire of an electrohydraulic lithotripter is inserted into the bile duct through the choledochoscope to break up the stones; a stone retrieval basket is then inserted through the choledochoscope to retrieve the stones. Because the lithotripsy guidewire and the stone retrieval basket are separate, the guidewire must be removed and the basket inserted, then the basket removed and the guidewire inserted again – a repetitive and time-consuming process.

[0003] Existing technology CN212592310U discloses a hydraulic-electrical lithotripsy stone retrieval basket, in which the basket and the hydraulic-electrical lithotripsy guide wire are respectively located in two cavities of the connecting tube, achieving a combination of stone fragmentation and stone retrieval. However, the basket and the hydraulic-electrical lithotripsy guide wire are not coaxial, which may cause difficulties in aligning the hydraulic-electrical lithotripsy guide wire during operation. CN217907954U discloses a hydraulic-electrical lithotripsy basket with the lithotripsy electrode located in the center, but when the basket moves, it may only enter and exit the outer tube from one side of the cavity, which is prone to problems such as jamming or basket deformation. Therefore, there is a need to design a new hydraulic-electrical lithotripsy stone retrieval basket that is less likely to deviate from the electrode when fragmenting the retrieved stone, and whose movement is smoother and less prone to deformation when entering and exiting the outer tube, and is less likely to be damaged when inserted into the endoscope. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic-electric lithotripsy and stone retrieval basket device that simultaneously performs hydraulic-electric lithotripsy and stone retrieval functions, significantly reducing the number of instrument exchanges and ensuring safety and effectiveness. The basket is coaxially arranged with the electrode, making it easier for the electrode to be aligned with the stone for lithotripsy. At the same time, the basket can be completely retracted into the outer tube, protecting it from damage when inserted into the endoscope, and facilitating electrode alignment when the stone has not been retrieved.

[0005] According to one aspect of the present invention, a hydraulic-electric lithotripsy stone-retrieving basket device is provided, comprising a connector and a handle that moves axially along the connector. The connector is provided with a hydraulic-electric lithotripsy electrode interface and a water inlet. An outer tube is provided at the front end of the connector, and an inner tube coaxially arranged inside the outer tube is provided, forming an injection cavity between the outer tube and the inner tube. A conductive wire is provided inside the inner tube, one end of which is connected to one end of the hydraulic-electric lithotripsy electrode interface, and the other end is connected to the hydraulic-electric lithotripsy electrode, which is located inside the inner tube. A traction rope is provided inside the injection cavity, one end of which is connected to the handle, and the other end is connected to the basket body. The basket body has a circular ring structure at both ends.

[0006] Preferably, there are two traction ropes, located on the upper and lower sides of the inner tube respectively, and the longitudinal distance between the two traction ropes is equal to the diameter of the annular cross-section at the rear end of the basket body.

[0007] Preferably, the inner tube is coaxially arranged with the basket body.

[0008] Preferably, the electrohydraulic lithotripsy electrode is 0.5-2 mm away from the front end of the inner tube.

[0009] Preferably, the electrohydraulic lithotripsy electrode is coaxial with the inner tube, the electrohydraulic lithotripsy electrode includes a positive electrode and a negative electrode, the negative electrode has a ring-shaped structure, the positive electrode is located at the axis of the negative electrode, a first insulating layer is provided between the positive electrode and the negative electrode, and a second insulating layer is provided between the negative electrode and the inner tube.

[0010] Preferably, the basket body is diamond-shaped and consists of six alloy wires.

[0011] Preferably, the other end of the electrohydraulic lithotripsy electrode interface is connected to the electrohydraulic lithotripter.

[0012] This invention simultaneously satisfies the functions of electrohydraulic lithotripsy and stone retrieval, significantly reducing the number of instrument exchanges and ensuring safety and effectiveness. The basket and electrode are coaxially arranged, making it easier for the electrode to be aligned with the stone for lithotripsy. At the same time, the basket can be completely retracted into the outer tube, protecting it from damage when inserted into the endoscope, and facilitating electrode alignment when the stone has not been retrieved for lithotripsy. Attached Figure Description

[0013] Figure 1 A schematic diagram of the electrohydraulic lithotripsy basket device;

[0014] Figure 2 This is a cross-sectional view of the connection structure between the outer and inner pipes.

[0015] Figure 3 This is a schematic diagram of the structure of a net basket;

[0016] Figure 4 This is a schematic diagram of the structure of an electrohydraulic lithotripter electrode.

[0017] Figure 5 This is a diagram illustrating the state of pushing the handle to a remote location.

[0018] Figure 6 This is a schematic diagram showing the state of the handle being pulled towards the proximal end. Detailed Implementation

[0019] 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.

[0020] 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 indicated technical features. 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, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise expressly specified. 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 pertains. 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.

[0021] 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.

[0022] 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.

[0023] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-6As shown, the electrohydraulic lithotripsy stone-collecting basket device of this embodiment includes a connector 1 and a handle 2 that moves axially along the connector 1. The connector 1 is provided with an electrohydraulic lithotripsy electrode interface 11 and a water inlet 12. A hollow outer tube 3 is provided at the front end of the connector 1. A hollow inner tube 4 is provided inside the outer tube 3 and is coaxially arranged with the outer tube 3. An injection chamber 5 is formed between the outer tube 3 and the inner tube 4. A conductive wire 6 is provided inside the inner tube 4. One end of the conductive wire 6 is connected to one end of the electrohydraulic lithotripsy electrode interface 11, and the other end is connected to the electrohydraulic lithotripsy electrode 7. The electrohydraulic lithotripsy electrode 7 is located inside the inner tube 4. A traction rope 8 is provided inside the injection chamber 5. One end of the traction rope is connected to the handle 2, and the other end is connected to the basket body 9. The two ends of the basket body 9 are annular in cross-section.

[0025] Preferably, there are two traction ropes 8, located on the upper and lower sides of the inner tube 4 respectively. The longitudinal distance between the two traction ropes 8 is equal to the diameter of the annular cross-section at the rear end of the basket body 9. The cross-sections at both ends of the basket body 9 are annular, adapted to the outer diameter of the inner tube 4. Traction ropes 8 are set on the upper and lower sides of the inner tube 4 to facilitate the basket body 9 extending out of or into the outer tube 3. The inner tube 4 and the basket body 9 are coaxially arranged. The electrohydraulic lithotripsy electrode 7 is 0.5-2mm away from the front end of the inner tube 4. Since the electrohydraulic lithotripsy electrode has the best effect when discharging at a distance of 0.5-2mm from the stone, this distance setting can ensure better lithotripsy effect when the stone retrieved by the basket body 9 is fragmented, and can also protect the electrohydraulic lithotripsy electrode from direct contact with the human body, making the operation safer. The basket body 9 is diamond-shaped, and the main body is composed of six alloy wires; the basket body can also be set in other shapes as needed, which are not limited here. The electrohydraulic lithotripsy electrode 7 is coaxial with the inner tube 4. The electrode 7 includes a positive electrode 71 and a negative electrode 72. The negative electrode 72 has a ring-shaped structure, and the positive electrode 71 is located at the axis of the negative electrode 72. A first insulating layer 73 is provided between the positive electrode 71 and the negative electrode 72, and a second insulating layer 74 is provided between the negative electrode 72 and the inner tube 4. This coaxial design reduces the electrode's spatial dimensions and improves the discharge effect. The basket body 9 is coaxial with the inner tube 4, and the inner tube 4 is coaxial with the electrohydraulic lithotripsy electrode, ensuring that the basket body 9 and the electrohydraulic lithotripsy electrode are coaxially engaged. When fragmenting the stone retrieved by the basket body 9, the electrohydraulic lithotripsy electrode can more easily align with the center of the stone.

[0026] In use, the electrohydraulic lithotripsy electrode interface 11 on the connector 1 is connected to the electrohydraulic lithotripter 10. The handle 2 can slide back and forth and is connected to the traction rope 8 inside the outer tube 3 to control the back and forth movement of the traction rope 8, thereby allowing the basket body 9 to extend out of or retract into the outer tube 3. At this time, the basket body 9 is in an open or closed state. The connector 1 is provided with a water inlet 12, which communicates with the injection chamber 5 for injecting contrast agent or saline into the bile duct. The electro-lithotomy electrode interface 11 is connected to the electrohydraulic lithotomy electrode 7 via the conductive wire 6. When using the electrohydraulic lithotomy electrode for electrohydraulic lithotomy, since the lithotomy electrode 7 is coaxially set with the basket body 9, the electrode is easier to align with the center of the stone when lithotomy is performed on the stone retrieved by the basket body 9, resulting in better lithotomy effect. In addition, since the basket body 9 can be completely retracted into the outer tube 3, it protects the basket body 9 from damage when it is inserted into the endoscope, and it also facilitates the alignment of the electrohydraulic lithotomy electrode with the stone when lithotomy is performed on unretrieved stones.

[0027] This invention simultaneously satisfies the functions of electrohydraulic lithotripsy and stone retrieval, significantly reducing the number of instrument exchanges and ensuring safety and effectiveness. The basket and electrode are coaxially arranged, making it easier for the electrode to be aligned with the stone for lithotripsy. At the same time, the basket can be completely retracted into the outer tube, protecting it from damage when inserted into the endoscope, and facilitating electrode alignment when the stone has not been retrieved for lithotripsy.

[0028] 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 hydraulic electro-lithography stone-collecting basket device, comprising a connector (1) and a handle (2) movable axially along the connector (1), wherein the connector (1) is provided with a hydraulic electro-lithography electrode interface (11) and a water inlet (12), characterized in that, The connector (1) has an outer tube (3) at its front end. The outer tube (3) has an inner tube (4) coaxially arranged with the outer tube (3). An injection cavity (5) is formed between the outer tube (3) and the inner tube (4). A conductive wire (6) is provided in the inner tube (4). One end of the conductive wire (6) is connected to one end of the electrohydraulic lithotripsy electrode interface (11), and the other end is connected to the electrohydraulic lithotripsy electrode (7). The electrohydraulic lithotripsy electrode (7) is located in the inner tube (4). A traction rope (8) is provided in the injection cavity (5). One end of the traction rope is connected to the handle (2), and the other end is connected to the basket body (9). The basket body (9) has a circular ring structure at both ends.

2. The electrohydraulic lithotripsy basket device as described in claim 1, characterized in that: There are two traction ropes (8), located on the upper and lower sides of the inner tube (4) respectively. The longitudinal distance between the two traction ropes (8) is equal to the diameter of the annular section at the rear end of the basket body (9).

3. The electrohydraulic lithotripsy basket device as described in claim 1, characterized in that: The inner tube (4) is coaxially arranged with the basket body (9).

4. The electrohydraulic lithotripsy basket device as described in claim 1, characterized in that: The electrohydraulic lithotripsy electrode (7) is 0.5-2 mm away from the front end of the inner tube (4).

5. The electrohydraulic lithotripsy basket device as described in claim 3, characterized in that: The electrohydraulic lithotripter (7) is coaxial with the inner tube (4). The electrohydraulic lithotripter (7) includes a positive electrode (71) and a negative electrode (72). The negative electrode (72) has a ring-shaped structure. The positive electrode (71) is located at the axis of the negative electrode (72). A first insulating layer (73) is provided between the positive electrode (71) and the negative electrode (72). A second insulating layer (74) is provided between the negative electrode (72) and the inner tube (4).

6. The electrohydraulic lithotripsy basket device as described in claim 1, characterized in that: The basket body (9) is diamond-shaped and consists of six alloy wires.

7. The electrohydraulic rock crushing and extraction basket device as described in claim 1, characterized in that: The other end of the electrohydraulic lithotripsy electrode interface (11) is connected to the electrohydraulic lithotripter (10).

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