Stone extractor

Abstract

The utility model relates to the technical field of medical instruments, in particular to a stone extractor. Comprising a handle, a sheathing canal, a net basket, a first switch and a second switch, and the handle comprises a first main body and a second main body which are connected; the sheath tube is arranged at one end of the second body away from the first body; the net basket comprises a containing part and a pull wire which are connected, the containing part forms a containing cavity with an opening, the opening faces the pull wire, and the net basket can be contained in the sheath tube or extend out of the sheath tube; a first connecting wire and a second connecting wire are fixed on the first switch, and the first switch is slidably arranged on the first main body in the length direction of the first main body; the second switch is slidably arranged on the second body in the length direction of the second body. The first connecting wire penetrates through the second switch to be connected with the pull wire. The second connecting wire penetrates through the second switch to be connected with the containing part, the first connecting wire is fixedly connected with the second switch, and the second connecting wire is movably connected with the second switch. The structure can reduce the difficulty of a calculus removing operation and improve the operation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a lithotripter. Background Art

[0002] Endoscopic lithotripsy is a new minimally invasive technique that uses advanced endoscopic technology to directly remove stones from the body through a stone retrieval basket, especially suitable for the treatment of non-sandy stones. When using endoscopic basket lithotripsy, generally, lithotripsy treatment is carried out first. If it is necessary to fix or remove the crushed stones, a stone retrieval basket is required. On the one hand, it is to fix the stones so that they do not flow backward and make the lithotripsy operation proceed smoothly. On the other hand, it is to remove the stones.

[0003] Currently, for the existing stone retrieval basket products on the market, during clinical operations, some of the crushed stones are easily splashed to positions where the normal capture by the basket cannot be completed due to the impact of the laser. The operability of the existing basket for capturing stones in the direction is small, and the stone retrieval angle of the basket cannot be controlled. There are some positions where the stones are difficult to be taken out, resulting in greater difficulty and lower efficiency of such stone retrieval operations. Summary of the Utility Model

[0004] The technical problem to be solved in the embodiment of the utility model is to provide a lithotripter to solve the problems in the prior art that the operability of the basket for capturing stones in the direction is small, the stone retrieval angle of the basket cannot be controlled, and there are some positions where the stones are difficult to be taken out, resulting in greater difficulty of such stone retrieval operations.

[0005] The utility model discloses a lithotripter, which is characterized by comprising: a handle, a sheath tube, a basket, a first switch and a second switch. The handle comprises a first main body and a second main body which are connected. The sheath tube is arranged at one end of the second main body far away from the first main body. The basket comprises a receiving part and a traction wire which are connected. The receiving part forms a receiving cavity with an opening, and the direction of the opening faces the traction wire. The basket is movably connected with the sheath tube so that the basket can be received in the sheath tube or extend out of the sheath tube. The first switch is fixed with a first connecting wire and a second connecting wire, and the first switch is arranged on the first main body along the length direction of the first main body in a sliding manner. The second switch is arranged on the second main body along the length direction of the second main body in a sliding manner. The first connecting wire passes through the second switch and is connected with the traction wire. The second connecting wire passes through the second switch and is connected with the receiving part. The first connecting wire is fixedly connected with the second switch, and the second connecting wire is movably connected with the second switch.

[0006] Optionally, a first sliding groove is formed on the first body. The first switch includes a first knob, a first clamping portion, and a first mounting portion that are connected in sequence. The first clamping portion is slidably connected to the first sliding groove, the first mounting portion is located within the first sliding groove, and the first connecting wire and the second connecting wire are fixedly connected to the first mounting portion. A second sliding groove is formed on the second body. The second switch includes a second knob, a second clamping portion, and a second mounting portion that are connected in sequence. The second clamping portion is slidably connected to the second sliding groove, the second mounting portion is located within the second sliding groove, the first connecting wire is fixedly connected to the second mounting portion, and the first connecting wire is movably connected to the second mounting portion.

[0007] Optionally, a first mounting hole is formed on the first mounting portion, a first mounting tube is provided on the first mounting hole, the first connecting wire and the second connecting wire are fixed within the first mounting tube, and a first fastener is further provided on the first switch. The first fastener is used to connect the first mounting tube and the first mounting portion. A second mounting hole and a third mounting hole are formed on the second mounting portion, a second mounting tube is provided on the second mounting hole, the first connecting wire is fixed within the second mounting tube, and a second fastener is further provided on the second switch. The second fastener is used to connect the second mounting tube and the second mounting portion, and the second connecting wire is movably connected to the third mounting hole.

[0008] Optionally, the accommodating portion is formed by braiding a plurality of guide wires.

[0009] Optionally, the sheath tube includes a connected guiding tube and a fixing tube. The fixing tube is connected to the second body, and the basket is movably connected to the guiding tube so that the basket can be received within the guiding tube or extend out of the guiding tube. The diameter of the guiding tube is smaller than the diameter of the fixing tube.

[0010] Optionally, mutually independent first and second chambers are formed within the guiding tube along its length direction. When the basket is received within the guiding tube, the traction wire is located within the first chamber, and the accommodating portion is located within the second chamber.

[0011] Optionally, a connecting head is sleeved on the fixing tube, and the connecting head is threadedly connected to the second body. The second body is threadedly connected to the first body.

[0012] Optionally, the first sliding groove and the second sliding groove are arranged in parallel.

[0013] Optionally, texture grooves are formed on the surfaces of the first knob and the second knob.

[0014] Optionally, the first fastener and the second fastener are screws. A first threaded hole is formed in the first switch along the height direction. The first threaded hole communicates with the first mounting hole. The first fastener is disposed in the first threaded hole and abuts against the first mounting tube. A second threaded hole is formed in the second switch along the height direction. The second threaded hole communicates with the second mounting hole. The second fastener is disposed in the second threaded hole and abuts against the second mounting tube.

[0015] Compared with the prior art, the beneficial effects of the lithotripter provided by the embodiment of the present invention are as follows: The handle is provided to facilitate the medical staff to control the lithotripter. The sheath tube plays a guiding role and is used to enter the patient's body. During the process of inserting the lithotripter into the patient's body, the basket is received in the sheath tube. At this time, both the first switch and the second switch are in the closed position. After the medical staff controls the handle to make the end of the sheath tube reach the lesion site of the patient, the lithotripsy operation is started. At the same time, the first switch and the second switch are slid to make both the first switch and the second switch in the open position. The first switch and the second switch drive the first connecting wire and the second connecting wire to move. The first connecting wire and the second connecting wire push the accommodating part and the traction wire to extend out of the sheath tube, so that the basket is in an open state and is located on one side of the crushed stone. The second switch is slowly moved from the open position to the closed position. At this time, the second switch drives the first connecting wire to move. Under the traction of the first connecting wire, the traction wire gradually tightens to drive the accommodating part to move, so that the opening angle changes. By gradually moving the second switch until the opening of the accommodating part reaches the optimal lithotripsy angle, stop moving the second switch, control the accommodating part to capture the crushed stone. When the crushed stone enters the accommodating part from the opening, start to take out the crushed stone. The first switch is gradually moved to the closed position. The first switch drives the second connecting wire to move. Under the traction of the second connecting wire, the accommodating part will gradually shrink until the accommodating part tightly wraps the crushed stone and then stops moving the first switch. Control the handle to take out the sheath tube and the basket from the patient's body, and slide the first switch and the second switch to the open position to take out the crushed stone. The lithotripter of the present application has the function of controlling the angle of the basket. Therefore, during the operation, the first switch and the second switch can be used in cooperation, and the positions of the first switch and the second switch are adjusted to each other to quickly capture the crushed stone, reduce the difficulty of the lithotripsy operation, and improve the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solutions of the present invention will be further described in detail below in conjunction with the drawings and embodiments. In the drawings:

[0017] Figure 1 is a schematic diagram of the basket of the lithotripter provided by the embodiment of the present invention extending out of the sheath tube;

[0018] Figure 2 is a schematic diagram of the basket of the lithotripter provided by the embodiment of the present invention being received in the sheath tube;

[0019] Figure 3 It is a schematic structural diagram of the handle provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the first switch provided by an embodiment of the present utility model;

[0021] Figure 5 It is a schematic structural diagram of the second switch provided by an embodiment of the present utility model;

[0022] Figure 6 It is a schematic structural diagram of the second main body and the fixed pipe provided by an embodiment of the present utility model;

[0023] Figure 7 It is an exploded view of the second main body and the fixed pipe provided by an embodiment of the present utility model;

[0024] Figure 8 It is a schematic structural diagram of the connection structure of the wire basket, the first connecting wire and the second connecting wire provided by an embodiment of the present utility model;

[0025] Figure 9 is Figure 8 A partial enlarged schematic view;

[0026] Figure 10 It is one of the schematic application structures of the stone extractor in the kidney;

[0027] Figure 11 is Figure 10 A partial enlarged schematic view;

[0028] Figure 12 It is another schematic application structure of the stone extractor in the kidney;

[0029] Figure 13 is Figure 12 A partial enlarged schematic view.

[0030] The reference numerals in the figure are as follows:

[0031] 10. Handle; 110. First main body; 1101. First sliding groove; 120. Second main body; 1201. Second sliding groove; 20. Sheath tube; 210. Guide tube; 220. Fixed tube; 30. Retrieving basket; 310. Accommodating part; 3101. Opening; 311. Third mounting tube; 320. Traction wire; 40. First switch; 401. First threaded hole; 410. First knob; 411. Texture groove; 420. First clamping part; 430. First mounting part; 4301. First mounting hole; 431. First mounting tube; 440. First fastener; 50. Second switch; 501. Second threaded hole; 510. Second knob; 520. Second clamping part; 530. Second mounting part; 5301. Second mounting hole; 5302. Third mounting hole; 531. Second mounting tube; 540. Second fastener; 60. First connecting wire; 70. Second connecting wire; 81. Kidney; 82. Lithotripsy; 90. Connector. Detailed implementation mode

[0032] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Now, in combination with the drawings, the preferred embodiments of the present invention will be described in detail.

[0033] An embodiment of the present invention provides a stone extractor, as Figure 1 and Figure 2 shown, including: a handle 10, a sheath tube 20, a retrieving basket 30, a first switch 40 and a second switch 50. The handle 10 includes a connected first main body 110 and a second main body 120; the sheath tube 20 is arranged at one end of the second main body 120 away from the first main body 110; the retrieving basket 30 includes a connected accommodating part 310 and a traction wire 320. The accommodating part 310 forms an accommodating cavity with an opening 3101, and the direction of the opening 3101 faces the traction wire 320. The retrieving basket 30 is movably connected to the sheath tube 20 so that the retrieving basket 30 can be received in the sheath tube 20 or extended from the sheath tube 20; a first connecting wire 60 and a second connecting wire 70 are fixed on the first switch 40. The first switch 40 is slidably arranged on the first main body 110 along the length direction of the first main body 110; slidably arranged on the second main body 120 along the length direction of the second main body 120, the first connecting wire 60 passes through the second switch 50 and is connected to the traction wire 320; the second connecting wire 70 passes through the second switch 50 and is connected to the accommodating part 310. The first connecting wire 60 is fixedly connected to the second switch 50, and the second connecting wire 70 is movably connected to the second switch 50.

[0034] The setting of the handle 10 facilitates the medical staff to manipulate the stone extractor. The sheath tube 20 plays a guiding role and is used to enter the patient's body. During the process of inserting the stone extractor into the patient's body, the wire basket 30 is housed in the sheath tube 20. At this time, both the first switch 40 and the second switch 50 are in the closed position. After the medical staff manipulates the handle 10 to make the end of the sheath tube 20 reach the patient's lesion site, the stone extraction operation begins. At the same time, the first switch 40 and the second switch 50 are slid to make both the first switch 40 and the second switch 50 in the open position. The first switch 40 and the second switch 50 drive the first connecting wire 60 and the second connecting wire 70 to move. The first connecting wire 60 and the second connecting wire 70 push the accommodating part 310 and the traction wire 320 to extend out of the sheath tube 20, so that the wire basket 30 is in an open state and is located on one side of the crushed stone 82. The second switch 50 is slowly moved from the open position to the closed position. At this time, the second switch 50 drives the first connecting wire 60 to move. Under the traction of the first connecting wire 60, the traction wire 320 gradually tightens and drives the accommodating part 310 to move, so that the angle of the opening 3101 changes. By gradually moving the second switch 50 until the opening 3101 of the accommodating part 310 reaches the optimal stone extraction angle, the movement of the second switch 50 is stopped. The accommodating part 310 is controlled to capture the crushed stone 82. When the crushed stone 82 enters the accommodating part 310 from the opening 3101, the extraction of the crushed stone 82 begins. The first switch 40 is gradually moved to the closed position. The first switch 40 drives the second connecting wire 70 to move. Under the traction of the second connecting wire 70, the accommodating part 310 will gradually shrink until the accommodating part 310 tightly wraps the crushed stone 82 and then the movement of the first switch 40 is stopped. The handle 10 is manipulated to take out the sheath tube 20 and the wire basket 30 from the patient's body. The first switch 40 and the first switch 40 are slid to the open position to take out the crushed stone 82. The stone extractor of the present application has the characteristic of controlling the angle adjustment of the wire basket 30. Therefore, during the operation, the first switch 40 and the second switch 50 can be used in cooperation, and the positions of the first switch 40 and the second switch 50 can be adjusted with each other to quickly capture the crushed stone 82, reduce the difficulty of the stone extraction operation, and improve the operation efficiency.

[0035] Refer to Figure 1 , both the first switch 40 and the second switch 50 are in the open position. At this time, the wire basket 30 extends out of the sheath tube 20; during the actual use process, the crushed stone 82 at the patient's lesion site can also be toggled by continuously moving the second switch 50 back and forth to adjust the position of the crushed stone 82 and improve the convenience of stone extraction.

[0036] Refer to Figure 2 , both the first switch 40 and the second switch 50 are in the closed position. At this time, the wire basket 30 is housed in the sheath tube 20.

[0037] Refer to Figures 10 to 13 , the working process schematic of the stone extractor of this embodiment for extracting the crushed stone 82 in the patient's kidney 81 is given.

[0038] As a preferred solution of this embodiment, referring to Figures 3 to 5 , a first sliding groove 1101 is formed on the first main body 110. The first switch 40 includes a first knob 410, a first clamping portion 420, and a first mounting portion 430 that are connected in sequence. The first clamping portion 420 is slidably connected to the first sliding groove 1101. The first mounting portion 430 is located in the first sliding groove 1101. The first connecting wire 60 and the second connecting wire 70 are fixedly connected to the first mounting portion 430. A second sliding groove 1201 is formed on the second main body 120. The second switch 50 includes a second knob 510, a second clamping portion 520, and a second mounting portion 530 that are connected in sequence. The second clamping portion 520 is slidably connected to the second sliding groove 1201. The second mounting portion 530 is located in the second sliding groove 1201. The first connecting wire 60 is fixedly connected to the second mounting portion 530, and the first connecting wire 60 is movably connected to the second mounting portion 530.

[0039] Among them, in this embodiment, an implementation manner in which the first switch 40 and the second switch 50 are slidably arranged on the first main body 110 and the second main body 120 respectively is given. Specifically, the setting of the first sliding groove 1101 provides installation and sliding conditions for the first switch 40. The first clamping portion 420 of the first switch 40 is slidably connected to the first sliding groove 1101, so that the first switch 40 can slide along the length direction of the first main body 110. Medical staff can control the first knob 410 to realize the sliding of the first switch 40 on the first main body 110, improving the convenience of operating the first switch 40. The setting of the first mounting portion 430 provides an installation environment for the first connecting wire 60 and the second connecting wire 70, so that the first connecting wire 60 and the second connecting wire 70 are fixedly connected to the first switch 40 and can move along with the sliding of the first switch 40. The setting of the second sliding groove 1201 provides installation and sliding conditions for the second switch 50. The second clamping portion 520 of the second switch 50 is slidably connected to the second sliding groove 1201, so that the second switch 50 can slide along the length direction of the second main body 120. Medical staff can control the second knob 510 to realize the sliding of the second switch 50 on the second main body 120, improving the convenience of operating the second switch 50. The setting of the second mounting portion 530 provides an installation environment for the first connecting wire 60 and the second connecting wire 70, and makes the first connecting wire 60 fixedly connected to the second switch 50 and the second connecting wire 70 movably connected to the second switch 50, so as to realize the movement of the first connecting wire 60 along with the sliding of the second switch 50, and the second connecting wire 70 does not move along with the sliding of the second switch 50.

[0040] Referring to Figure 1 and Figure 2The first dial button 410 and the second dial button 510 are respectively protruded from the first body 110 and the second body 120, which is convenient for medical staff to operate, improves the control performance, and thus improves the efficiency of stone removal.

[0041] As a preferred solution of this embodiment, refer to Figure 4 and Figure 5 , Figure 8 and Figure 9 A first mounting hole 4301 is formed on the first mounting portion 430, a first mounting tube 431 is provided on the first mounting hole 4301, a first connecting wire 60 and a second connecting wire 70 are fixed in the first mounting tube 431, a first fastener 440 is further provided on the first switch 40, and the first fastener 440 is used to connect the first mounting tube 431 and the first mounting portion 430; a second mounting hole 5301 and a third mounting hole 5302 are formed on the second mounting portion 530, a second mounting tube 531 is provided on the second mounting hole 5301, the first connecting wire 60 is fixed in the second mounting tube 531, a second fastener 540 is further provided on the second switch 50, the second fastener 540 is used to connect the second mounting tube 531 and the second mounting portion 530, and the second connecting wire 70 is movably connected to the third mounting hole 5302.

[0042] Among them, this embodiment provides a connection method between the first connecting wire 60 and the second connecting wire 70 and the first mounting portion 430 and the second mounting portion 530. Specifically, a first mounting hole 4301 is formed on the first mounting portion 430, and a first mounting tube 431 is arranged on the first mounting hole 4301. The first connecting wire 60 and the second connecting wire 70 are fixed in the first mounting tube 431 to achieve a fixed connection between the first connecting wire 60 and the second connecting wire 70 and the first mounting portion 430. Then, a first fastener 440 is also arranged on the first switch 40. The first fastener 440 is used to connect the first mounting tube 431 and the first mounting portion 430, thereby improving the connection strength between the first mounting tube 431 and the first mounting portion 430, further improving the connection stability between the first connecting wire 60 and the second connecting wire 70 and the first mounting portion 430, and then improving the connection stability between the first connecting wire 60 and the second connecting wire 70 and the first switch 40, thereby improving the synergy of the use of the three.

[0043] A second mounting hole 5301 is formed on the second mounting portion 530, and a second mounting tube 531 is provided on the second mounting hole 5301. The first connecting wire 60 is fixed within the second mounting tube 531 to achieve the fixed connection between the first connecting wire 60 and the second mounting portion 530. By forming a third mounting hole 5302 on the second mounting portion 530, the second connecting wire 70 passes through the third mounting hole 5302 and is movably connected to the third mounting hole 5302 to achieve the movable connection between the second connecting wire 70 and the second mounting portion 530. Then, a second fastener 540 is further provided on the second switch 50. The second fastener 540 is used to connect the second mounting tube 531 and the second mounting portion 530, improving the connection strength between the second mounting tube 531 and the second mounting portion 530, further enhancing the connection stability between the first connecting wire 60 and the second mounting portion 530, and thus enhancing the connection stability between the first connecting wire 60 and the second switch 50, improving the usage synergy between the two.

[0044] The above-mentioned first mounting tube 431 and second mounting tube 531 can be made of stainless steel material.

[0045] As a preferred solution of this embodiment, referring to Figure 8 , the accommodating portion 310 is formed by braiding a plurality of guide wires.

[0046] In this embodiment, a structural form of the accommodating portion 310 is given. Specifically, the accommodating portion 310 is formed by braiding a plurality of guide wires. The braiding density and braiding shape are not specifically limited and can be adaptively adjusted according to the size of the gravel 82 during the actual working process. No specific limitation is made here. Referring to Figure 8 , an example with an oval braiding shape is given.

[0047] Please continue to refer to Figure 8 , a third mounting tube 311 is provided at one end of the accommodating portion 310 connected to the second connecting wire 70. One ends of the plurality of guide wires forming the accommodating portion 310 are disposed in the third mounting tube 311, and the end portion of the second connecting wire 70 is also disposed in the third mounting tube 311, improving the connection strength and stability between the accommodating portion 310 and the second connecting wire 70.

[0048] The accommodating portion 310 forms an accommodating cavity with an opening 3101. The gravel 82 can enter the accommodating cavity through the opening 3101. The direction of the opening 3101 faces the traction wire 320. By moving the second switch 50, the traction wire 320 can be driven to move, thereby adjusting the angle of the opening 3101 so that the accommodating portion 310 reaches the position corresponding to the gravel 82, improving the stone extraction efficiency.

[0049] As a preferred solution of this embodiment, referring to Figure 1 and Figure 2The sheath tube 20 includes a sleeved guiding tube 210 and a fixing tube 220. The fixing tube 220 is connected to the second main body 120. The wire basket 30 is movably connected to the guiding tube 210 so that the wire basket 30 can be received in the guiding tube 210 or extended from the guiding tube 210. The diameter of the guiding tube 210 is smaller than that of the fixing tube 220.

[0050] In this embodiment, a structural form of the sheath tube 20 is given. Specifically, the sheath tube 20 includes a connected guiding tube 210 and a fixing tube 220. The fixing tube 220 is connected to the second main body 120 to fix the sheath tube 20. The guiding tube 210 extends from outside the patient's body to the lesion site inside the body. The remaining part of the stone extractor is outside the patient's body to control the stone extractor. The diameter of the guiding tube 210 is set smaller than that of the fixing tube 220 to achieve the transition connection between the guiding tube 210 and the second main body 120 and improve the smoothness and stability of the guiding tube 210 during use.

[0051] The set length of the above-mentioned guiding tube 210 needs to meet the depth at which the wire basket 30 can reach the patient's lesion site during use, and no specific limitation is made here.

[0052] As a preferred solution of this embodiment, a first chamber and a second chamber that are independent of each other are formed in the guiding tube 210 along its length direction. When the wire basket 30 is received in the guiding tube 210, the traction wire 320 is located in the first chamber, and the accommodating part 310 is located in the second chamber.

[0053] Among them, the independent first chamber and second chamber are arranged in the guiding tube 210 so that when the wire basket 30 is received in the guiding tube 210, the traction wire 320 and the accommodating part 310 are independently located in the first chamber and the second chamber respectively, preventing the guide wire of the accommodating part 310 from being wound around the traction wire 320. The first chamber and the second chamber are arranged in parallel in the guiding tube 210 to ensure the smoothness of the stone extractor in this embodiment and improve the surgical efficiency.

[0054] As a preferred solution of this embodiment, Figure 6 and Figure 7 , a connecting head 90 is sleeved on the fixing tube 220. The connecting head 90 is threadedly connected to the second main body 120; the second main body 120 is threadedly connected to the first main body 110.

[0055] Among them, the setting of the connecting head 90 can improve the connection strength between the fixing tube 220 and the second main body 120 and enhance the connection stability between the two. Specifically, the connecting head 90 is threadedly connected to the second main body 120. At the same time, the second main body 120 is threadedly connected to the first main body 110, improving the connection convenience and connection strength, and further enhancing the overall working stability of the stone extractor and ensuring the surgical efficiency.

[0056] Refer to Figure 7, one end of the fixed tube 220 close to the second main body 120 is a conical groove, and the corresponding end of the second main body 120 is a conical protrusion. The conical groove and the conical protrusion cooperate with each other to improve the connection stability between the fixed tube 220 and the second main body 120.

[0057] As a preferred solution of this embodiment, the first sliding groove 1101 and the second sliding groove 1201 are arranged in parallel.

[0058] Among them, setting the first sliding groove 1101 and the second sliding groove 1201 in parallel can coordinate the consistency when the first switch 40 and the second switch 50 are used. The control of the wire basket 30 by the first switch 40 and the second switch 50 is smoother, improving the maneuverability of the stone extractor.

[0059] As a preferred solution of this embodiment, texture grooves 411 are formed on the surfaces of the first knob 410 and the second knob 510.

[0060] Among them, the setting of the texture grooves 411 facilitates the medical staff to push and pull the first knob 410 and the second knob 510, making it easier for the medical staff to control the first switch 40 and the second switch 50, and improving the convenience of operating the stone extractor.

[0061] As a preferred solution of this embodiment, the first fastener 440 and the second fastener 540 are screws. The first switch 40 is formed with a first threaded hole 401 in the height direction. The first threaded hole 401 communicates with the first mounting hole 4301. The first fastener 440 is arranged in the first threaded hole 401 and abuts against the first mounting tube 431. The second switch 50 is formed with a second threaded hole 501 in the height direction. The second threaded hole 501 communicates with the second mounting hole 5301. The second fastener 540 is arranged in the second threaded hole 501 and abuts against the second mounting tube 531.

[0062] Among them, the above-mentioned first fastener 440 and second fastener 540 adopt screws. Screws are common mechanical connectors with strong connection stability, and have strong installation stability and convenience of use. The first switch 40 is formed with a first threaded hole 401 in the height direction. The first fastener 440 is arranged in the first threaded hole 401 and abuts against the first mounting tube 431. The second switch 50 is formed with a second threaded hole 501 in the height direction. The second fastener 540 is arranged in the second threaded hole 501 and abuts against the second mounting tube 531, strengthening the connection strength of the first mounting tube 431 on the first mounting part 430 and the connection strength of the second mounting tube 531 on the second mounting part 530. Furthermore, the overall connection stability of the stone extractor is improved, ensuring the working stability and improving the surgical efficiency.

[0063] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present invention.

Claims

1. A stone removal tool, characterized in that: include: A handle comprising a first body and a second body connected to each other; A sheath tube is provided at an end of the second body away from the first body; A net basket comprises a connected accommodation portion and a traction line, wherein the accommodation portion forms an accommodation cavity having an opening, the direction of the opening is toward the traction line, and the net basket is movably connected to the sheath tube so that the net basket can be accommodated in the sheath tube or extended from the sheath tube; a first switch, to which a first connecting wire and a second connecting wire are fixed, and the first switch is slidably disposed on the first body along a length direction of the first body; The second switch is slidably arranged on the second body along the length direction of the second body, the first connecting wire passes through the second switch and is connected to the pulling wire; the second connecting wire passes through the second switch and is connected to the accommodating portion, the first connecting wire is fixedly connected to the second switch, and the second connecting wire is movably connected to the second switch.

2. The stone removal tool according to claim 1, characterized in that: A first sliding groove is formed on the first body, the first switch comprises a first dial button, a first clamping portion and a first mounting portion which are connected in sequence, the first clamping portion is slidably connected to the first sliding groove, the first mounting portion is located in the first sliding groove, and the first connecting wire and the second connecting wire are fixedly connected to the first mounting portion; A second sliding groove is formed on the second main body, and the second switch includes a second dial button, a second clamping portion and a second mounting portion which are connected in sequence, the second clamping portion is slidably connected to the second sliding groove, the second mounting portion is located in the second sliding groove, the first connecting wire is fixedly connected to the second mounting portion, and the first connecting wire is movably connected to the second mounting portion.

3. The stone removal device according to claim 2, characterized in that: A first mounting hole is formed on the first mounting portion, a first mounting tube is disposed on the first mounting hole, the first connecting wire and the second connecting wire are fixed in the first mounting tube, and a first fastener is further disposed on the first switch, the first fastener is used to connect the first mounting tube and the first mounting portion; A second mounting hole and a third mounting hole are formed on the second mounting portion, a second mounting tube is arranged on the second mounting hole, the first connecting wire is fixed in the second mounting tube, a second fastener is also arranged on the second switch, the second fastener is used to connect the second mounting tube and the second mounting portion, and the second connecting wire is movably connected to the third mounting hole.

4. The stone removal device according to claim 1, characterized in that: The accommodation portion is formed by weaving a plurality of guide wires.

5. The stone removal tool according to claim 1, characterized in that: The sheath tube includes a connected guide tube and a fixed tube, the fixed tube is connected to the second body, and the net basket is movably connected to the guide tube so that the net basket can be accommodated in the guide tube or extended from the guide tube; the diameter of the guide tube is smaller than the diameter of the fixed tube.

6. The stone removal device according to claim 5, characterized in that: The guide tube has a first chamber and a second chamber that are independent of each other formed in the length direction thereof. When the basket is accommodated in the guide tube, the traction line is located in the first chamber, and the accommodation portion is located in the second chamber.

7. The stone removal device according to claim 5, characterized in that: The fixing pipe is sleeved with a connector, and the connector is threadedly connected to the second main body; the second main body is threadedly connected to the first main body.

8. The stone removal device according to claim 2, characterized in that: The first sliding groove and the second sliding groove are arranged in parallel.

9. The stone removal device according to claim 2, characterized in that: Texture grooves are formed on the surfaces of the first dial button and the second dial button.

10. The stone removal device according to claim 3, characterized in that: The first fastener and the second fastener are screws. A first threaded hole is formed on the first switch in the height direction, the first threaded hole is connected to the first mounting hole, the first fastener is arranged in the first threaded hole and abuts against the first mounting tube; a second threaded hole is formed on the second switch in the height direction, the second threaded hole is connected to the second mounting hole, the second fastener is arranged in the second threaded hole and abuts against the second mounting tube.

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