A front end component of a stone-taking net basket and a stone-taking net basket

Abstract

The present invention provides a stone-removing basket front-end assembly and a stone-removing basket, which relate to the field of medical devices. The present invention comprises a first basket, which can move relative to a sheath tube along a first direction to switch between an expanded state outside the sheath tube and a stored state inside the sheath tube; a second basket, which can move relative to the sheath tube along a first direction to switch between an expanded state outside the sheath tube and a stored state inside the sheath tube, the second basket is connected to the first basket and is located on the proximal side of the first basket, and a connecting portion is provided on the proximal side of the second basket; and a linkage, which is movably arranged in the sheath tube and detachably connected to the connecting portion, and the linkage is used to drive the first basket and the second basket to switch between the expanded state and the stored state. Compared with the prior art, the present invention has the advantages of avoiding surgical operations required due to basket incarceration, thereby significantly reducing clinical risks and alleviating the pain of patients.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a front end component of a stone removal basket and a stone removal basket. Background Art

[0002] The stone removal basket is a commonly used medical device, mainly used to remove stones in the ureter or renal pelvis during urological surgery. Its working principle is to extend the basket into the target area through the working channel of the endoscope, grab the stone and remove it smoothly from the body. The stone removal basket has the advantages of simple operation, less trauma and fast recovery, and is widely used in minimally invasive urological surgery.

[0003] In actual applications, stone removal baskets are mainly used to remove stone fragments after lithotripsy. However, when using a basket to displace stones during surgery, the stones may get stuck in the ureter or calyx, causing the basket to loosen and fail to release the stones. If the operation is not performed properly, the most serious complication, ureteral avulsion, may occur. In this case, it may become difficult to insert other lithotripsy devices such as laser fibers into the working channel. At this time, surgery is often required to remove the incarcerated basket, which greatly increases clinical risks and patient pain. Summary of the invention

[0004] In order to solve the above problems, the present application provides a stone retrieval basket front end component and a stone retrieval basket.

[0005] In the first aspect, the present application provides a front end assembly of a stone extraction basket, which adopts the following technical solution:

[0006] A front end assembly of a stone retrieval basket is applied to a stone retrieval basket, wherein the stone retrieval basket comprises a sheath tube, including:

[0007] a first basket movable in a first direction relative to the sheath tube to switch between an expanded state outside the sheath tube and a stowed state inside the sheath tube;

[0008] a second basket, which can move relative to the sheath tube in a first direction to switch between an expanded state outside the sheath tube and a stored state inside the sheath tube, the second basket being connected to the first basket and located at the proximal side of the first basket, the proximal side of the second basket being provided with a connecting portion; and,

[0009] A linkage member is movably arranged in the sheath and detachably connected to the connecting portion, and is used to drive the first net basket and the second net basket to move along a first direction so that the first net basket and / or the second net basket can be switched between an expanded state and a stored state.

[0010] Preferably, the first net basket and the second net basket are connected via a connecting piece.

[0011] Preferably, the connecting member is detachably connected to the first basket;

[0012] And / or, the connecting member is detachably connected to the second basket.

[0013] Preferably, the linkage member is provided with an electromagnet, and the connecting portion is provided with a magnetic member for engaging with the electromagnet.

[0014] Preferably, the connecting portion is provided with a recessed groove, the magnetic member is arranged in the recessed groove, the electromagnet can be inserted into the recessed groove and attracted to the magnetic member, and an anti-pinch gap is provided between the connecting portion and the linkage member;

[0015] Alternatively, the linkage member is provided with a recessed groove, the electromagnet is arranged in the recessed groove, the magnetic member can be inserted into the recessed groove and attracted to the electromagnet, and an anti-pinch gap is provided between the connecting portion and the linkage member.

[0016] Preferably, one of the connecting portion and the linkage member is provided with a connecting groove, and the other is provided with a connecting buckle for engaging with the connecting groove. When the connecting buckle is located in the connecting groove, the linkage member and the connecting portion can be matched in a first direction at an upper limit position.

[0017] Preferably, when the connecting buckle is located in the connecting groove, the connecting buckle can move a preset distance in a first direction relative to the connecting groove.

[0018] Preferably, inside the sheath tube, the connecting buckle is restricted by the inner wall of the sheath tube so that the connecting buckle is retained in the connecting groove.

[0019] Preferably, the connection groove is provided on the connection part, the opening of the connection groove is located on the side of the connection part, the connection part is provided with a slot, the slot extends from the proximal end of the connection part to the distal end of the connection part, the slot is communicated with the opening of the connection groove, and the slot forms a notch at the proximal end of the connection part;

[0020] And / or, the connecting buckle comprises a first part and a second part which are perpendicular to each other, the first part is connected to the linkage member or the connecting part, and the second part is used to be inserted into the connecting groove so that the second part is buckled with the connecting groove;

[0021] And / or, an observation port is provided in communication with the connection groove, and when the connection buckle is located in the connection groove, at least a portion of the connection buckle is located at the observation port.

[0022] In the second aspect, the present application provides a stone-collecting basket, which adopts the following technical solution:

[0023] A stone retrieval basket comprises a stone retrieval basket front end assembly as described in the above technical solution, and also comprises a sheath and a handle, wherein the linkage, the first basket and the second basket are movably arranged in the sheath along a first direction, and the handle is provided with a push button, and the push button is used to push the linkage to move along the first direction to drive the first basket and / or the second basket to enter and exit the sheath.

[0024] The present invention has the following advantages and beneficial effects:

[0025] The linkage can be used to push the first basket to move inside and outside the sheath, so that the first basket can be switched between the expanded state and the stored state, thereby effectively capturing the stone. When the first basket is incarcerated during the process of removing the stone, the linkage can be used to push the second basket to expand, and the linkage can be separated from the connecting part, so that the first basket and the second basket remain in the body, while the linkage and other stone-removing basket components are removed from the body. This design provides sufficient operating space for the subsequent insertion of other lithotripsy equipment (such as laser optical fiber), and lithotripsy can be performed smoothly even in the case of stone incarceration. After the lithotripsy equipment successfully breaks the stone, the stone-removing basket can be reinserted into the body, and the linkage can be reconnected to the connecting part, so that the first basket, the second basket and the broken stones can be removed together. Compared with traditional methods, this design avoids the need for surgical operations due to basket incarceration, thereby significantly reducing clinical risks and alleviating patient pain.

[0026] In addition, since the connection part is located at the proximal side of the second basket, when the linkage part is separated from the connection part, the deployed second basket can stably support the body and keep the connection part fixed, which is helpful to reconnect with the linkage part after the lithotripsy operation is completed. At the same time, the first basket and the second basket are deployed in the body to provide effective support for the ureter and other cavities, thereby facilitating the subsequent insertion of lithotripsy equipment and the re-docking of the linkage part and the connection part, ensuring smooth operation.

[0027] During the lithotripsy process, since the stones are firmly captured by the first basket, the first basket can effectively restrain the stones and prevent them from scattering during lithotripsy to a certain extent. After the lithotripsy is completed, the broken stones remain in the first basket, so there is no need to recapture the stones. After the linkage is reconnected to the connecting part, the first basket, the second basket and the lithotripsy can be quickly taken out together, significantly shortening the operation time, reducing clinical risks, and further alleviating the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a first structural schematic diagram of an embodiment of the present application;

[0030] Figure 2 is a second structural schematic diagram of an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the structure when the magnetic part and the electromagnet cooperate;

[0032] Figure 4 is a third structural schematic diagram of an embodiment of the present application;

[0033] Figure 5 is a cross-sectional view of an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of the explosion structure of an embodiment of the present application;

[0035] Figure 7 It is a structural schematic diagram of the connection part;

[0036] Figure 8 It is a partial cross-sectional view of the connection portion;

[0037] Fig. 9 It is a structural diagram of the connecting buckle;

[0038] Fig.10 It is a schematic diagram of the structure of the connection buckle and the connection part;

[0039] Fig.11 It is a schematic diagram of the structure of a stone-taking net basket.

[0040] The markings in the figure are:

[0041] 1. Endoscope; 10. Stone removal basket; 11. Sheath; 12. Handle; 13. Push button; 100. First basket; 110. Connector; 200. Second basket; 210. Connecting part; 211. Magnetic part; 212. Recessed groove; 212a. Anti-pinch gap; 213. Connecting groove; 213a. Observation port; 214. Slot; 215. Notch; 216. Stopper; 300. Linkage; 310. Electromagnet; 320. Connecting buckle; 321. First part; 322. Second part. DETAILED DESCRIPTION

[0042] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0043] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0044] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0045] The following is combined with Figures 1 to 11 , a stone retrieval basket front end component and a stone retrieval basket provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0046] The first aspect of this embodiment provides a detailed description of a front end assembly of a stone removal basket.

[0047] Reference Figure 1 , Fig.11 The embodiment of the present application discloses a front end assembly of a stone removal basket, which is applied to a stone removal basket 10, specifically to the distal end of the stone removal basket 10. The front end assembly is applicable to stone removal operations in urological surgery, and can effectively capture and remove stones in the ureter or renal pelvis. Exemplarily, the stone removal basket 10 includes a sheath 11, and the front end assembly is movably disposed in the sheath 11.

[0048] Reference Figure 1 , Figure 2The front end assembly includes a first basket 100, a second basket 200 and a linkage 300. The first basket 100 and the second basket 200 both have an expanded state and a stored state. When the first basket 100 and the second basket 200 are in the sheath 11, due to the circumferential restriction of the inner wall of the sheath 11 on them, both are constrained and deformed, and are therefore in a stored state. In this state, the size of the basket is greatly reduced, which is convenient for operation in a narrow area in the ureter or renal pelvis. When the basket is moved out of the sheath 11 and loses the circumferential constraint of the sheath 11, the first basket 100 and the second basket 200 gradually return to their original shape under the action of their own elasticity, so that the first basket 100 and the second basket 200 are in an expanded state.

[0049] It is understandable that when the first basket 100 is in the unfolded state, the first basket 100 can capture stones. Exemplarily, the first basket 100 includes basket wires, and when the first basket 100 is unfolded, the spacing between adjacent basket wires increases, allowing stones to pass through the gaps between the basket wires and enter the first basket 100. After capturing the stone, the first basket 100 is gradually moved into the sheath 11, and the spacing between the basket wires is gradually reduced, so that the stone cannot pass through the gaps between the basket wires, thereby completing the capture of the stone.

[0050] Similarly, the structure of the second basket 200 is similar to that of the first basket 100, and can also capture stones. It should be noted that the first basket 100 and the second basket 200 can be made of different materials and weaving methods according to specific surgical requirements to adapt to different stone shapes and sizes.

[0051] Exemplarily, the first basket 100 and the second basket 200 may be made of a memory alloy. The memory alloy has excellent shape memory effect and superelasticity, which means that when the first basket 100 and the second basket 200 are squeezed or deformed, they can return to their original shape under appropriate conditions, thereby ensuring that the first basket 100 and the second basket 200 can quickly return to a predetermined shape when deployed in the body. This material selection helps to improve the capture efficiency of the first basket 100 and the second basket 200 and reduce the possibility of mistakes or failures during operation.

[0052] In some embodiments, reference Figure 1 , Figure 2, the first net basket 100 can move along the first direction relative to the sheath tube 11 to switch between an expanded state outside the sheath tube 11 and a stored state inside the sheath tube 11. Specifically, when the first net basket 100 is outside the sheath tube 11, it will naturally return to its expanded state due to the loss of the circumferential restraint of the sheath tube 11, so that the stone can be captured. When the stone needs to be removed from the body, the first net basket 100 is controlled to move along the first direction so that it gradually enters the sheath tube 11, and the net basket wires are then retracted and the net basket is in a stored state, thereby safely wrapping the stone therein.

[0053] In some embodiments, the second basket 200 can move relative to the sheath tube 11 in a first direction to switch between an expanded state outside the sheath tube 11 and a stored state inside the sheath tube 11. The second basket 200 is connected to the first basket 100 and is located at the proximal side of the first basket 100. The proximal side of the second basket 200 is provided with a connecting portion 210. Specifically, in the first direction, the second basket 200 is located at the proximal side of the first basket 100.

[0054] In some embodiments, the linkage member 300 is movably disposed in the sheath tube 11 and is detachably connected to the connection portion 210. The linkage member 300 is used to drive the first basket 100 and the second basket 200 to move along a first direction, so that the first basket 100 and / or the second basket 200 can be switched between an expanded state and a stored state. In the event of stone incarceration, the linkage member 300 can be separated from the connection portion 210 to avoid the problem of requiring surgery to remove the basket.

[0055] It can be understood that the first direction is the extension direction of the sheath 11 or the axial direction of the sheath 11, which means that when the first basket 100 and the second basket 200 move along the first direction, they will move in the sheath 11 along the extension direction of the sheath 11. In other words, the switching process between the storage state and the deployment state of the first basket 100 and the second basket 200 is achieved by moving along the axial direction of the sheath 11. Such a design facilitates the operator to more accurately control the position of the basket during surgery and effectively capture and treat stones.

[0056] Specifically, when the first basket 100 is stuck in the process of capturing stones, the linkage 300 can continue to push the second basket 200 to unfold, and then the linkage 300 is separated from the connecting portion 210, so that the first basket 100 and the second basket 200 remain in the body, while the linkage 300 and other basket components are removed from the body. At this time, the operator outside the body can insert other lithotripsy equipment (such as laser fiber) into the target area to treat the stuck stones.

[0057] The detachable connection design of the linkage 300 and the connection part 210 can not only separate the basket from the operating assembly at a critical moment to avoid complicated surgical operations caused by the basket being stuck, but also provide necessary operating space for subsequent lithotripsy operations. After the lithotripsy operation is completed, the operator can reinsert the stone removal basket 10 into the body, and remove the first basket 100, the second basket 200 and the lithotripsy together by reconnecting the linkage 300 and the connection part 210. This design reduces the risks during the operation to a certain extent and reduces the pain of the patient.

[0058] The first basket 100 and the second basket 200 not only have the function of capturing stones, but also can be unfolded and stably supported in the body, thereby keeping the position of the connecting part 210 fixed. The main purpose of this design is to ensure that the linkage 300 can be smoothly reconnected with the connecting part 210 after the lithotripsy operation is completed.

[0059] Specifically, when the first basket 100 and the second basket 200 are deployed in the body, the two basket structures will effectively support the ureter and other cavities. This support not only helps to maintain the patency of the cavity, but also provides sufficient space and stability for the insertion of the lithotripsy equipment and subsequent operations. In this way, the linkage 300 can be re-connected with the connecting part 210 after the lithotripsy operation is completed, ensuring the smooth progress of the entire operation process.

[0060] According to an alternative embodiment, referring to Figure 1 , Figure 2 The first net basket 100 and the second net basket 200 are connected by a connecting piece 110. The length of the connecting piece 110 can be selected according to specific surgical requirements before use. By setting connecting pieces 110 of different lengths, the distance between the first net basket 100 and the second net basket 200 can be adjusted, so that the two net baskets support different positions in the body cavity.

[0061] For example, in some embodiments, the connector 110 is detachably connected to the first basket 100 or the second basket 200. This structure allows connectors 110 of different lengths to be replaced as needed before surgery to adapt to the specific conditions of different patient cavities. For example, when it is necessary to use it in a wider or narrower cavity, a connector 110 of a suitable length can be selected to ensure effective support of the basket system.

[0062] In another embodiment, the connecting member 110 can be integrally connected to the first net basket 100 and the second net basket 200. In this case, different length models of the connecting members 110 can be selected. These types of connecting members 110 are designed to have fixed lengths during manufacturing, and can be selected for use before surgery. By selecting a suitable type of connecting member 110, it can be ensured that during surgery, the net basket can be stably supported in the body cavity, thereby creating favorable conditions for subsequent lithotripsy.

[0063] By providing the connector 110, the distance between the first basket 100 and the second basket 200 can be flexibly adjusted according to specific surgical requirements before surgery. By selecting the connector 110 of appropriate length, the basket system can provide reliable support in different cavity environments, reduce the difficulty of operation, and provide sufficient space for the smooth entry of lithotripsy equipment. Especially when dealing with narrow or irregular cavities, it can effectively reduce the difficulty of operation, reduce the risk during surgery, and provide more reliable support for the insertion of lithotripsy equipment and subsequent operations.

[0064] According to an alternative embodiment, referring to Figure 1 , Figure 2 The connecting piece 110 is detachably connected to the first mesh basket 100. Through this design, the connecting piece 110 of different lengths can be replaced according to the surgical requirements, thereby adjusting the distance between the first mesh basket 100 and the second mesh basket 200 to meet the support requirements of different cavities.

[0065] According to an optional embodiment, the connector 110 is detachably connected to the second basket 200. This solution also allows the selection of a connector 110 of a suitable length before surgery to ensure stable support of the second basket 200 in the body cavity, thereby facilitating subsequent lithotripsy and stone removal processes.

[0066] According to an optional embodiment, the linkage member 300 is provided with an electromagnet 310, and the connecting portion 210 is provided with a magnetic member 211 for engaging with the electromagnet 310. Through the cooperation between the electromagnet 310 and the magnetic member 211, the linkage member 300 and the connecting portion 210 can be quickly separated and connected. It should be understood that the magnetic member 211 can be a part made of a magnet or a ferromagnetic material. When the magnetic member 211 is a magnet, its magnetism is relatively weak, so that after the electromagnet 310 is powered off, the electromagnet 310 can be separated from the magnetic member 211 by a small force. In addition, since the magnetic member 211 itself is also magnetic, when the electromagnet 310 and the magnetic member 211 are attracted, the two can be automatically aligned by magnetic force, thereby improving the accuracy and efficiency of docking.

[0067] According to an alternative embodiment, referring to Figure 2 , Figure 3, the connecting part 210 is provided with a recessed groove 212, the magnetic member 211 is provided in the recessed groove 212, the electromagnet 310 can be inserted into the recessed groove 212 and attracted with the magnetic member 211, and an anti-pinch gap 212a is provided between the connecting part 210 and the linkage member 300. Or, the linkage member 300 is provided with a recessed groove 212, the electromagnet 310 is provided in the recessed groove 212, the magnetic member 211 can be inserted into the recessed groove 212 and attracted with the electromagnet 310, and an anti-pinch gap 212a is provided between the connecting part 210 and the linkage member 300.

[0068] It is understandable that during the process of the electromagnet 310 and the magnetic member 211 being attracted, part of the body tissue may be adsorbed between the electromagnet 310 and the magnetic member 211, thereby increasing the risk of surgery. By providing the recessed groove 212 in the design, since it is difficult for the body tissue to enter the recessed groove 212, this design can effectively reduce the occurrence of the above situation. In addition, the provision of the anti-clamping gap 212a can ensure that a certain gap is maintained between the linkage member 300 and the connecting portion 210 after connection, and this gap helps to avoid the risk of tissue being squeezed.

[0069] For example, refer to Figure 3 , the anti-clamping gap 212a can be set in the connection area between the recessed groove 212 and the electromagnet 310 or the magnetic member 211, and is designed on all contact surfaces where compression may exist, so as to reduce the risk of tissue damage as much as possible. For example, when the recessed groove 212 is located on the connecting portion 210, the anti-clamping gap 212a can be located between the recessed groove 212 and the electromagnet 310, and the anti-clamping gap 212a is set between the distal end surface of the linkage member 300 and the proximal end surface of the connecting portion 210. This design can reduce the possibility of internal tissue being squeezed or clamped when the connecting portion 210 and the linkage member 300 are attracted, thereby reducing the risk during surgery.

[0070] According to an alternative embodiment, referring to Figure 4 , Figure 6 One of the connecting part 210 and the linkage part 300 is provided with a connecting groove 213, and the other is provided with a connecting buckle 320 for buckling with the connecting groove 213. When the connecting buckle 320 is located in the connecting groove 213, the linkage part 300 and the connecting part 210 can be matched in the upper limit position in the first direction. This structural design can prevent the linkage part 300 and the connecting part 210 from accidentally detaching during use, and when disassembly is required, it can be separated by applying appropriate force in a specific direction. This design not only ensures the stability of the connection, but also provides a simple disassembly method, which is beneficial to improving the safety and efficiency of surgical operations.

[0071] According to an alternative embodiment, referring to Figure 7 , Figure 8, when the connecting buckle 320 is located in the connecting groove 213, the connecting buckle 320 can move a preset distance in the first direction relative to the connecting groove 213. This design provides a certain degree of freedom for the connection between the linkage 300 and the connecting portion 210 to adapt to the complex and irregular shapes of the body cavity and reduce the jamming phenomenon caused by the irregular cavity. At the same time, this design also provides a certain buffer space for the body tissue, reducing the risk of the tissue being compressed between the connecting buckle 320 and the connecting groove 213, thereby reducing the potential risks in the operation.

[0072] When it is necessary to capture stones, the first basket 100 is released outside the sheath 11 to be in an expanded state so as to capture the stones and remove them from the body. When the stone is stuck during the removal process, so that the first basket 100 and the stone cannot be removed smoothly, the operation needs to be paused, and the second basket 200 is gradually released outside the sheath 11. During the release of the second basket 200, since the first basket 100 is stuck in the body and cannot move in the body, it is necessary to release the second basket 200 while gradually withdrawing the sheath 11. Since this operation is performed by the doctor hand-held, it is difficult to control the accuracy, so there may be a situation where the speed of releasing the second basket 200 does not match the speed of withdrawing the sheath 11. This mismatch may cause the second basket 200 to touch the first basket 100 during the release process, thereby causing discomfort or other risks.

[0073] By setting the connection buckle 320 to be movable in the first direction within the connection slot 213 for a preset distance, necessary compensation can be provided in the process of releasing the second net basket 200 and withdrawing the sheath tube 11. Specifically, when the speed of releasing the second net basket 200 and withdrawing the sheath tube 11 is inconsistent, the relative movement of the connection buckle 320 can adjust the relative position between the two, thereby reducing interference with the first net basket 100 and reducing pain and risk during surgery. This design effectively improves the flexibility and safety of the operation, so that even in the case of complex in vivo cavity environment, the capture and removal of stones can be successfully completed.

[0074] It is understandable that, because the connection buckle 320 can move a preset distance relative to the connection slot 213 in the first direction, it is also easier to fasten the connection buckle 320 and the connection slot 213 together. This design allows a certain amount of space adjustment during the fastening process, so that the connection buckle 320 can be more easily aligned and fastened with the connection slot 213, thereby improving the accuracy and reliability of the connection. It is understandable that the length of the preset distance is directly related to the extension length of the connection slot 213 in the first direction. By designing the connection slot 213 to have different extension lengths in the first direction, the length of the preset distance can be adjusted. Specifically, when the extension length of the connection slot 213 increases, the preset distance that the connection buckle 320 can move in the first direction will also increase accordingly; conversely, if the extension length of the connection slot 213 decreases, the preset distance will also be shortened accordingly.

[0075] According to an alternative embodiment, referring to Figure 4 , Figure 5 In the sheath tube 11, the connecting buckle 320 is limited by the inner wall of the sheath tube 11, so that the connecting buckle 320 is kept in the connecting groove 213. Specifically, after the linkage 300 and the connecting part 210 are placed in the sheath tube 11, the connecting buckle 320 cannot be disengaged from the connecting groove 213 due to the space limitation of the inner wall of the sheath tube 11. This design can prevent the connecting buckle 320 from being accidentally loosened during the operation, thereby facilitating the continuity and safety of the entire stone removal process.

[0076] It is understandable that, since the connection buckle 320 is restricted by the inner wall of the sheath 11, during the operation, the linkage 300 and the connection part 210 can maintain a firm connection, and the connection part 210 will not be accidentally separated due to pulling or rotation during the operation. This design plays an important role in stability during the operation, especially when it is necessary to maintain the position of the instrument for a long time or perform delicate operations, it can provide additional protection.

[0077] According to an alternative embodiment, referring to Figure 6 , Figure 7 The connection groove 213 is disposed on the connection portion 210, and the opening of the connection groove 213 is located on the side of the connection portion 210, for example Figure 7The circumferential side wall of the cylindrical connecting part 210 and the proximal surface of the connecting part 210 are provided with a slot 214, which extends from the proximal end of the connecting part 210 to the distal side of the connecting part 210, and the slot 214 is connected to the opening of the connecting groove 213, and the slot 214 forms a notch 215 at the proximal end of the connecting part 210. Since the notch 215 is located at the proximal side of the connecting part 210, when the linkage 300 is reconnected to the connecting part 210, the position of the notch 215 can be observed through the camera of the endoscope 1 located at the proximal side of the connecting part 210. This design allows the operator to accurately insert the connecting buckle 320 into the slot 214 through the notch 215, so as to guide the connecting buckle 320 into the connecting groove 213, so that the connecting groove 213 and the connecting buckle 320 are buckled.

[0078] It is understandable that by providing the slot 214 in the connection part 210 and forming the notch 215 at the proximal end, the operation steps can be effectively simplified, especially in a surgical environment where precise docking is required. Through the field of view of the endoscope 1, the operator can observe and adjust the position of the connection buckle 320 in real time to ensure that it smoothly enters the slot 214 and finally buckles in the connection groove 213. This design improves the accuracy and efficiency of docking, reduces blind operations during the operation, and reduces the risk of connection failure.

[0079] For example, refer to Figure 7 , Figure 8 , there is also an observation port 213a connected to the connection groove 213, and the observation port 213a is located on the opposite side of the opening of the connection groove 213. After the connection buckle 320 is inserted into the connection groove 213 through the opening of the connection groove 213, it can be checked through the observation port 213a whether the connection buckle 320 has entered the predetermined position. It can be understood that by presetting the shape of the connection buckle 320, after the connection buckle 320 enters the connection groove 213, part of the connection buckle 320 can be located in the observation port 213a or protrude from the observation port 213a, so that it is convenient to confirm the docking status of the connection groove 213 and the connection buckle 320 through the camera. This design helps to improve the docking accuracy and operational reliability, and reduces the risk of errors that may occur during the connection process.

[0080] According to an alternative embodiment, referring to Fig. 9 , Fig.10, the connecting buckle 320 includes a first part 321 and a second part 322 which are perpendicular to each other, the first part 321 is connected to the linkage member 300 or the connecting part 210, and the second part 322 is used to be inserted into the connecting groove 213 so that the second part 322 is buckled with the connecting groove 213. Exemplarily, the connecting buckle 320 is L-shaped, including a first part 321 and a second part 322 which are perpendicular to each other. Specifically, the length of the first part 321 is greater than that of the second part 322, and the first part 321 is used to connect with the linkage member 300, while the second part 322 is used to buckle with the connecting groove 213. In the specific operation process, the second part 322 is inserted into the opening of the connecting groove 213 from the side of the connecting part 210, and is gradually pushed forward until the end of the second part 322 away from the first part 321 reaches the position of the observation port 213a. At this time, the connecting buckle 320 will be buckled with the connecting groove 213.

[0081] This L-shaped design allows the connection buckle 320 to better match the connection slot 213 during the insertion process, and the accuracy of the connection can be further confirmed by the position of the observation port 213a. In addition, through the design of the L-shaped structure, the insertion and fastening process of the connection buckle 320 is more intuitive and controllable, which helps to improve the accuracy and reliability of the entire operation.

[0082] It is understandable that a stopper 216 ( Figure 1 The area within the dotted line is the stopper 216. Through the stopper 216, the connection buckle 320 can achieve the limited fit with the connection part 210 in the first direction. Specifically, after the second part 322 of the connection buckle 320 enters the connection groove 213 from the opening of the connection groove 213, as the connection buckle 320 moves in the first direction, the second part 322 will eventually contact the stopper 216. At this time, the stopper 216 will limit the further movement of the connection buckle 320 in the first direction, so that the linkage member 300 and the connection part 210 can achieve the effect of limited fit in the first direction.

[0083] It is understandable that the stone removal basket 10 is generally inserted into the instrument channel of the endoscope 1 for use during use. Specifically, when it is necessary to separate or reconnect the connecting buckle 320 from the connecting slot 213, since the opening of the connecting slot 213 is located on the side, it is necessary to bend it through the active bending section at the distal end of the endoscope 1 during operation. This operation step enables the connecting buckle 320 to enter the opening of the connecting slot 213 from the side to achieve smooth docking or separation. Through the active bending section of the endoscope 1, the docking process between the connecting buckle 320 and the connecting slot 213 can be more accurately controlled, thereby reducing the risk of misoperation. In addition, by using a camera to monitor the connection status in real time, the accuracy of the connection can be further improved, avoiding potential problems caused by poor connection during surgery.

[0084] A second aspect of this embodiment provides a detailed description of a stone-removing net basket.

[0085] Reference Figure 2 , Fig.11 A stone retrieval basket includes a front end assembly of the stone retrieval basket in the above embodiment, and also includes a sheath 11 and a handle 12. A linkage 300, a first basket 100 and a second basket 200 are movably arranged in the sheath 11 along a first direction. The handle 12 is provided with a push button 13, and the push button 13 is used to push the linkage 300 to move along the first direction to drive the first basket 100 and / or the second basket 200 to enter and exit the sheath 11.

[0086] Specifically, when the first net basket 100 and the second net basket 200 need to capture stones, the push button 13 pushes the linkage 300 in the first direction, thereby driving the first net basket 100 to be gradually released from the sheath tube 11 to the outside of the sheath tube 11, so that the first net basket 100 is in an expanded state. The first net basket 100 can form a capture area in the expanded state, and the stone can enter the capture area through the gap between adjacent net basket wires. After the stone is captured, the reverse movement of the push button 13 pulls the first net basket 100 back into the sheath tube 11, forcing the first net basket 100 to close, thereby firmly capturing the stone inside.

[0087] If the stone is incarcerated during the process of removing the stone, the push button 13 can further push the linkage 300 to gradually release the second basket 200 from the sheath 11 to the outside of the sheath 11 to help eliminate the incarceration problem. Since the second basket 200 is connected to the first basket 100 and can form a support in the body after being expanded outside the sheath 11, the connection part 210 is kept fixed, which helps to reconnect the linkage 300 with the connection part 210 in subsequent operations. At the same time, the expanded second basket 200 can also provide effective support for ureters and other cavities, facilitating the smooth insertion and operation of the lithotripsy equipment.

[0088] This design not only achieves the capture and removal of stones through physical structure, but also ensures flexibility and stability in complex surgical environments, greatly reducing the surgical risks caused by incarceration. Through the design of detachable connection, the operator can select or replace connectors 110 of different lengths or characteristics according to specific surgical needs, thereby adapting to the anatomical structure and surgical requirements of different patients. This design greatly improves the safety of surgery and the convenience of operation.

[0089] A third aspect of this embodiment provides a detailed description of an endoscope.

[0090] Reference Fig.11The present embodiment also relates to an endoscope, wherein the endoscope 1 includes the stone removal basket 10 in the aforementioned embodiment. The stone removal basket 10 is inserted and used through the instrument channel of the endoscope 1. Specifically, the instrument channel of the endoscope 1 provides an operable channel for the stone removal basket 10, so that it can smoothly reach the target area. During operation, the endoscope 1 achieves precise control of the stone removal basket 10 in the instrument channel through the active bending section at its front end, so that stones can be effectively captured and removed in a complex in vivo environment.

[0091] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A front end assembly of a stone retrieval basket, applied to a stone retrieval basket (10), the stone retrieval basket (10) comprising a sheath tube (11), characterized in that: include: A first net basket (100) is movable relative to the sheath tube (11) along a first direction so as to switch between an expanded state located outside the sheath tube (11) and a stored state located inside the sheath tube (11); a second net basket (200) is movable relative to the sheath tube (11) along a first direction so as to switch between an expanded state located outside the sheath tube (11) and a stored state located inside the sheath tube (11), the second net basket (200) being connected to the first net basket (100) and being located inside the sheath tube (11). A connecting portion (210) is provided on the proximal side of the first net basket (100) and the proximal side of the second net basket (200); and a linkage member (300) is movably arranged in the sheath tube (11) and detachably connected to the connecting portion (210), the linkage member (300) being used to drive the first net basket (100) and the second net basket (200) to move along a first direction, so that the first net basket (100) and / or the second net basket (200) can be switched between an expanded state and a stored state; The linkage member (300) is provided with an electromagnet (310), and the connection portion (210) is provided with a magnetic member (211) for being attracted to the electromagnet (310); The connecting portion (210) is provided with a recessed groove (212), the magnetic member (211) is arranged in the recessed groove (212), the electromagnet (310) can be inserted into the recessed groove (212) and attracted to the magnetic member (211), and an anti-pinch gap (212a) is provided between the connecting portion (210) and the linkage member (300); or, the linkage member (300) is provided with a recessed groove (212), the electromagnet (310) is arranged in the recessed groove (212), the magnetic member (211) can be inserted into the recessed groove (212) and attracted to the electromagnet (310), and an anti-pinch gap (212a) is provided between the connecting portion (210) and the linkage member (300).

2. A front end assembly of a stone retrieval basket according to claim 1, characterized in that: The first net basket (100) and the second net basket (200) are connected via a connecting piece (110).

3. A front end assembly of a stone extraction basket according to claim 2, characterized in that: The connecting piece (110) is detachably connected to the first net basket (100); and / or the connecting piece (110) is detachably connected to the second net basket (200).

4. A front end assembly of a stone retrieval basket according to any one of claims 1 to 3, characterized in that: One of the connecting portion (210) and the linkage member (300) is provided with a connecting groove (213), and the other is provided with a connecting buckle (320) for buckling with the connecting groove (213); when the connecting buckle (320) is located in the connecting groove (213), the linkage member (300) and the connecting portion (210) can be matched in a limit position in a first direction.

5. The front end assembly of the stone extraction basket according to claim 4, characterized in that: When the connection buckle (320) is located in the connection slot (213), the connection buckle (320) can move a preset distance in a first direction relative to the connection slot (213).

6. The front end assembly of the stone extraction basket according to claim 5, characterized in that: In the sheath tube (11), the connection buckle (320) is restricted by the inner wall of the sheath tube (11), so that the connection buckle (320) is retained in the connection groove (213).

7. The front end assembly of the stone retrieval basket according to claim 4, characterized in that: The connecting groove (213) is arranged on the connecting portion (210), the opening of the connecting groove (213) is located on the side of the connecting portion (210), the connecting portion (210) is provided with a slot (214), the slot (214) extends from the proximal end of the connecting portion (210) to the distal end of the connecting portion (210), the slot (214) is communicated with the opening of the connecting groove (213), and the slot (214) forms a notch (215) at the proximal end of the connecting portion (210); and / or the connecting buckle (320) comprises two mutually perpendicular A straight first portion (321) and a second portion (322), wherein the first portion (321) is connected to the linkage member (300) or the connecting portion (210), and the second portion (322) is used to be inserted into the connecting groove (213) so that the second portion (322) is buckled with the connecting groove (213); and / or an observation port (213a) is provided in communication with the connecting groove (213), and when the connecting buckle (320) is located in the connecting groove (213), at least a portion of the connecting buckle (320) is located at the observation port (213a).

8. A stone-removing basket, characterized in that: A stone removal basket front end assembly comprising the stone removal basket front end assembly according to any one of claims 1 to 7, further comprising a sheath tube (11) and a handle (12), wherein the linkage member (300), the first basket (100) and the second basket (200) are movably arranged in the sheath tube (11) along a first direction, and the handle (12) is provided with a push button (13), and the push button (13) is used to push the linkage member (300) to move along the first direction to drive the first basket (100) and / or the second basket (200) to enter and exit the sheath tube (11).

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