A stone-taking net basket fixing part and stone-taking net basket

Abstract

The present invention provides a stone removal basket fixing part and a stone removal basket, which relate to the field of medical devices. The present invention comprises a basket head, which is used to be connected to the distal end of the basket wire; a movable part, which is movably connected to the basket head, so as to switch from a fixed state to a released state; and a driving part, which is used to drive the movable part to move relative to the basket head, so as to switch the movable part from a fixed state to a released state; wherein, when the movable part is in the fixed state, the movable part can fix the basket wire to the basket head; when the movable part is in the released state, the basket head can be disengaged from the basket wire. Compared with the prior art, the present invention has the advantages of being able to remove the incarcerated basket without surgical operation, which greatly reduces clinical risks and patient pain.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stone removal basket fixing component 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-mentioned problems, the present application provides a stone retrieval basket fixing member and a stone retrieval basket.

[0005] In a first aspect, the present application provides a stone removal basket fixing member, which adopts the following technical solution:

[0006] A stone-taking basket fixing member is applied to a stone-taking basket, wherein the stone-taking basket comprises a basket wire, and the basket wire is elastic, and comprises:

[0007] A basket head, used to connect with the distal end of the basket wire;

[0008] a movable member movably connected to the basket head to switch from a fixed state to a released state; and,

[0009] A driving member, used for driving the movable member to move relative to the basket head, so that the movable member switches from a fixed state to a released state;

[0010] Wherein, when the movable member is in a fixed state, the movable member can fix the basket wire to the basket head;

[0011] When the movable part is in a released state, the basket head can be disengaged from the basket wire.

[0012] Preferably, a gap is formed between the movable member and the basket head, and when the movable member is in a fixed state, the basket wire is clamped in the gap;

[0013] When the movable member is in a released state, the clamping gap opens so that the basket wire can escape from the clamping gap.

[0014] Preferably, the basket head and / or the movable part is provided with a fitting groove for fitting with the outer wall of the basket wire, and when the basket wire is located in the gap, the basket wire is located in the fitting groove.

[0015] Preferably, the movable member is provided with a through hole, and the number of the movable members is at least two;

[0016] The movable parts are hinged to the basket head, and when the movable parts are switched from the released state to the fixed state, the adjacent movable parts are close to each other;

[0017] Part of the basket wire is located in the through hole to push adjacent movable parts closer to each other.

[0018] Preferably, the movable member is hinged to the basket head via a hinge shaft, and the through hole includes an inlet and an outlet; wherein:

[0019] The through hole is located on a side of the movable member away from the hinge axis;

[0020] And / or, during the switching of the movable member from the fixed state to the released state, the movable member rotates toward the side away from the central axis of the basket head, the inlet is located at the side of the movable member close to the central axis of the basket head, and the outlet is located at the side of the movable member away from the central axis of the basket head;

[0021] And / or, the distance between the outlet and the hinge axis is smaller than the distance between the inlet and the hinge axis.

[0022] Preferably, the mesh basket head is movably provided with a linkage member, and when the linkage member moves relative to the mesh basket head, the linkage member can push the movable member to switch from a fixed state to a released state;

[0023] The driving member includes a cutting wire, and the cutting wire is connected to the linkage member to drive the linkage member to move relative to the basket head;

[0024] When the cutting wire is pulled, the cutting wire can move relative to the basket wire, so that the linkage can move relative to the basket head;

[0025] When the tension on the cutting wire exceeds a predetermined value, the cutting wire is disconnected from the linkage member.

[0026] Preferably, the outer sleeve is provided on the outer sleeve of the cutting wire, the cutting wire can move relative to the outer sleeve along the central axis direction of the cutting wire, the outer sleeve and the basket wire together form a basket, and the outer sleeve can be linked with the basket wire to expand or store the stone removal basket;

[0027] The cutting wire is provided with a breaking notch near the end of the linkage member. When the cutting wire is pulled, the cutting wire can be broken from the breaking notch.

[0028] Preferably, the movable member is provided with a binding member, and the outer sleeve is located between adjacent binding members. When the movable member is in a fixed state, the outer sleeve is pressed between the binding members.

[0029] Preferably, when the movable member is in a fixed state, adjacent restraining members are in contact with each other;

[0030] The binding members are provided with glue, and adjacent binding members can be adhered to each other through the glue. The glue becomes invalid after being in contact with water for a predetermined time, so that adjacent binding members can be separated from each other.

[0031] In the second aspect, the present application provides a stone-collecting basket, which adopts the following technical solution:

[0032] A stone retrieval basket comprises a stone retrieval basket fixing member as described in the above technical solution, and also comprises a handle and a sheath tube, wherein the sheath tube has a receiving and releasing opening, and the basket wire, the outer sleeve and the cutting wire can be deployed or stored through the receiving and releasing opening, and the handle is movably provided with a first push button and a second push button, and when the first push button is moved, the basket wire, the outer sleeve and the cutting wire can be deployed or stored through the receiving and releasing opening; when the second push button is moved, the cutting wire can be moved relative to the outer sleeve to break the cutting wire.

[0033] The present invention has the following advantages and beneficial effects:

[0034] By setting a movable part, the basket wire can be fixed on the basket head, so that the stone retrieval basket can perform a capture operation to capture objects such as stones. When the stone and the stone retrieval basket are stuck in the ureter or calyx neck, the movable part can be driven by the driving part to loosen the basket wire, so that the basket wire moves relative to the stone, and finally loosens the basket and releases the stone. In this way, the incarcerated basket can be removed without surgical operation, which greatly reduces clinical risks and patient pain.

[0035] On the other hand, when the basket is removed, there is enough space to insert other lithotripsy devices to break up the impacted stones. The impacted stones can be removed without surgical operation, reducing clinical risks and patient pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 is a first structural schematic diagram of an embodiment of the present application;

[0038] Figure 2 is a second structural schematic diagram of an embodiment of the present application;

[0039] Figure 3 is a first cross-sectional view of an embodiment of the present application;

[0040] Figure 4 is a second cross-sectional view of the embodiment of the present application;

[0041] Figure 5 It is a schematic diagram of the structure of the basket wire;

[0042] Figure 6 It is a schematic diagram of the structure when the cut wire is connected to the linkage;

[0043] Figure 7 is a first structural schematic diagram of the cooperation between the basket head and the movable member;

[0044] Figure 8 is a second structural schematic diagram of the mesh basket head and the movable member;

[0045] Fig. 9 It is a third structural schematic diagram of the cooperation between the basket head and the movable part;

[0046] Fig.10 is a fourth structural schematic diagram of the cooperation between the basket head and the movable part;

[0047] Fig.11 is a third structural schematic diagram of an embodiment of the present application;

[0048] Fig.12 It is a schematic diagram of the structure of a stone-taking net basket.

[0049] The markings in the figure are:

[0050] 10. Stone removal basket; 11. Handle; 12. First push button; 13. Second push button; 14. Sheath; 14a. Retractable opening; 15. Basket wire; 100. Basket head; 110. Linkage member; 111. Pushing part; 200. Movable member; 210. Slit; 211. Fitting groove; 220. Through hole; 221. Inlet; 222. Outlet; 230. Restraining member; 300. Driving member; 310. Cutting wire; 311. Fracture notch; 320. Outer sleeve; 400. Articulated shaft. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its components 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".

[0054] Combine the following Figures 1 to 12 A stone retrieval basket fixing 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.

[0055] A first aspect of this embodiment provides a detailed description of a stone removal basket fixing member.

[0056] Reference Fig.12 , a stone retrieval basket fixing member, the fixing member is used for a stone retrieval basket 10. Exemplarily, the stone retrieval basket 10 includes a handle 11, a sheath 14 and a basket, the sheath 14 is connected to the handle 11, and the basket can move in the sheath 14 to expand or retract the basket. It can be understood that the basket can capture stones when expanded.

[0057] In some embodiments, reference Fig.12 , Figure 5 The basket includes a basket wire 15, at least part of the basket wire 15 is located in the sheath tube 14, and part of the basket wire 15 extends out from the distal end of the sheath tube 14, that is, the distal end of the basket wire 15 is located outside the sheath tube 14. Among them, the basket wire 15 is elastic. It can be understood that the basket wire 15 here is elastic, which means that the basket wire 15 can be deformed under the action of its own elasticity to unfold the basket. Exemplarily, when the basket is operated to move outside the sheath tube 14, the basket wire 15 will move outside the sheath tube 14, and the basket wire 15 located outside the sheath tube 14 will deform under the action of its own elastic force due to the lack of the restraint of the sheath tube 14, thereby increasing the distance between adjacent basket wires 15, so that the stone can enter the basket surrounded by the basket wire 15. By manipulating the basket to move inside the sheath tube 14, the basket wire 15 will be passively deformed under the action of the sheath tube 14, reducing the distance between the basket wires 15, thereby firmly capturing the stone.

[0058] In some embodiments, the fixing element is detachably connected to the distal end of the basket wire 15. When the fixing element is separated from the basket wire 15, the basket wire 15 is released, thereby loosening the basket, and the stone can fall out of the basket.

[0059] Reference Figure 1 , Figure 2 , the fixing member includes a basket head 100, a movable member 200 and a driving member 300. Exemplarily, the basket head 100 is a basic member, the movable member 200 can be movably connected to the basket head 100, and the driving member 300 is used to drive the movable member 200 to move relative to the basket head 100. In some embodiments, the movable member 200 has two states: a fixed state and a released state. When the movable member 200 moves relative to the basket head 100, the movable member 200 can be switched from the fixed state to the released state. When the movable member 200 is in the fixed state, the movable member 200 can fix the basket wire 15 to the basket head 100, and when the movable member 200 is in the released state, the basket head 100 can be disconnected from the basket wire 15.

[0060] In some embodiments, reference Figure 3 , Figure 6 , the driving member 300 can drive the movable member 200 to switch from the fixed state to the released state. Exemplarily, the driving member 300 is a driving rope. By pulling the driving rope, the movable member 200 can be moved relative to the basket head 100, and the movable member 200 can be switched from the fixed state to the released state. At this time, the basket wire 15 fixed on the basket head 100 will be separated from the basket head 100. By driving the basket wire 15 to the sheath tube 14 (combined with Fig.12), the basket can be separated from the stone and finally completely enter the sheath tube 14. The basket can be taken out of the body by removing the sheath tube 14 from the body. In some embodiments, the driving member 300 can also be an airbag structure, which is fixed between the basket head 100 and the movable member 200. By blowing air into the airbag structure, the airbag can be expanded, thereby pushing the movable member 200 to move relative to the basket head 100, so that the movable member 200 switches from a fixed state to a released state.

[0061] According to an alternative embodiment, referring to Figure 3 , Figure 4 , a gap 210 is formed between the movable member 200 and the basket head 100, and when the movable member 200 is in a fixed state, the basket wire 15 is clamped in the gap 210. When the movable member 200 is in a released state, the gap 210 opens so that the basket wire 15 can escape from the gap 210. That is, by moving the movable member 200 relative to the basket head 100, the size of the gap 210 can be changed. When the gap 210 is small, the basket wire 15 will be clamped between the movable member 200 and the basket head 100. When the gap 210 is large, the size of the gap 210 is larger than the diameter of the basket wire 15, and the basket wire 15 can be pulled out from the gap 210.

[0062] Exemplarily, the movable member 200 is connected to the basket head 100 by sliding in a direction close to or away from the basket head 100 (not shown in the figure), and the slit 210 is located in the area between the side of the movable member 200 facing the basket head 100 and the side of the basket head 100 facing the movable member 200. When the movable member 200 moves toward the basket head 100, the size of the slit 210 gradually decreases. If the basket wire 15 is located in the slit 210, as the movable member 200 continues to slide, the basket wire 15 will be clamped in the slit 210. At this time, the basket wire 15 is fixed on the basket head 100, that is, the movable member 200 is in a fixed state. When the movable member 200 moves away from the basket head 100, the size of the slit 210 gradually increases. If the basket wire 15 is clamped in the slit 210, as the movable member 200 continues to slide, the basket wire 15 will be released from the slit 210, so that the basket head 100 and the basket wire 15 are disengaged, that is, the movable member 200 is in a released state. It can be understood that the movable member 200 can also be connected to the basket head 100 in other forms, for example, the movable member 200 is hinged to the basket head 100 (see Figure 3 and Figure 4 ).

[0063] According to an alternative embodiment, referring to Figure 7 , Figure 8, the basket head 100 is provided with a fitting groove 211, and the opening of the fitting groove 211 is located in the slit 210. When the basket wire 15 needs to be clamped in the slit 210, the basket wire 15 can be placed in the fitting groove 211. Exemplarily, the shape of the fitting groove 211 is adapted to the outer contour shape of the basket wire 15. When the basket wire 15 is pressed in the fitting groove 211, the contact area between the fitting groove 211 and the basket wire 15 is larger, thereby providing a better fixing effect and effectively preventing the basket wire 15 from sliding relative to the basket head 100 or the movable part 200. It can be understood that the fitting groove 211 can also be provided on the movable part 200, or the fitting groove 211 can be provided on both the basket head 100 and the movable part 200. The specific setting position of the fitting groove 211 is not specifically limited in this embodiment.

[0064] According to an optional embodiment, the number of movable members 200 is at least two, and at least one through hole 220 is provided on each movable member 200. The through hole 220 means that the hole has two openings, that is, the basket wire 15 can enter the through hole 220 from one of the openings, and can pass out of the through hole 220 from the other opening.

[0065] In some embodiments, the movable member 200 is hinged to the net basket head 100. For example, the net basket head 100 is connected to a hinge shaft 400, and the movable member 200 is rotatably connected to the hinge shaft 400. The gap 210 is located at the hinge between the movable member 200 and the net basket head 100. When the movable member 200 rotates relative to the net basket head 100, the size of the gap 210 can be changed.

[0066] In some embodiments, when the movable member 200 switches from the released state to the fixed state, adjacent movable members 200 move closer to each other. For example, the end of the movable member 200 away from the hinge shaft 400 is a free end. When the movable member 200 moves relative to the basket head 100, the free end of the movable member 200 moves toward or away from the center of the basket head 100. In this way, when the movable member 200 switches from the released state to the fixed state, adjacent movable members 200 can move closer to each other.

[0067] In some embodiments, reference Fig. 9 , Fig.10 , part of the basket wire 15 is located in the through hole 220 to push the adjacent movable parts 200 closer to each other. It can be understood that the basket wire 15 is made of a material such as a memory alloy and has a preset initial shape. When the shape of the basket wire 15 is changed, elastic force is formed inside the basket wire 15, and after the external force is removed, the basket wire 15 can return to its initial shape.

[0068] For example, when it is necessary to capture stones, the basket wire 15 is pushed out from the sheath 14. Without the restraint of the sheath 14, the basket wire 15 will diffuse deformation in all directions, increase the distance between adjacent basket wires 15, and allow the stones to enter the basket through the distance between adjacent basket wires 15. In this state, due to the restrictions of the organs or cavities in the body, the basket wire 15 will still be restrained by the organs or cavities in the body, thereby generating a contraction force. Since part of the basket wire 15 is located in the through hole 220, this part of the contraction force will be transmitted to the movable part 200, thereby pushing the movable part 200 to be in a fixed state, thereby fixing the basket head 100 and the basket wire 15 together.

[0069] According to an alternative embodiment, referring to Figure 8 , Fig.11 , the movable part 200 is hinged to the basket head 100 through the hinge shaft 400, the through hole 220 includes an inlet 221 and an outlet 222, and the through hole 220 is located on the side of the movable part 200 away from the hinge shaft 400. That is, the through hole 220 is arranged on the free end side of the movable part 200. Since part of the basket wire 15 is located in the through hole 220, and the basket wire 15 is required to push the movable part 200 to rotate so that the basket wire 15 is fixed to the basket head 100, therefore, in order to improve the fixing effect of the basket wire 15, it is necessary to increase the thrust of the basket wire 15 to push the movable part 200 to rotate, and clamp the basket wire 15 into the slit 210. The through hole 220 is arranged on the free end side of the movable part 200, which can increase the torque when pushing the movable part 200 to rotate, so that the movable part 200 can more easily clamp the basket wire 15 into the slit 210, thereby improving the fixing effect.

[0070] According to an optional embodiment, during the switching of the movable member 200 from the fixed state to the released state, the movable member 200 rotates toward the side away from the central axis of the basket head 100, the inlet 221 is located on the side of the movable member 200 close to the central axis of the basket head 100, and the outlet 222 is located on the side of the movable member 200 away from the central axis of the basket head 100. That is, the inlet 221 is closer to the central axis of the basket head 100. Figure 8 , Fig.12 The basket wire 15 passes through the distal end of the sheath tube 14, enters the through hole 220 through the inlet 221, and then exits from the outlet 222 and enters the slit 210. By arranging the inlet 221 close to the central axis of the basket head 100, adjacent basket wires 15 can be brought close to each other at the inlet 221, so that the basket wires 15 surround and form a basket, which is convenient for capturing stones.

[0071] According to an alternative embodiment, referring to Figure 2 , Figure 8, the distance between the outlet 222 and the hinge shaft 400 is smaller than the distance between the inlet 221 and the hinge shaft 400. Exemplarily, the inlet 221 is located on the free end side of the movable member 200, and the outlet 222 is located on the side of the movable member 200 close to the hinge shaft 400. This arrangement enables the basket wires 15 to be close to each other on the free end side of the movable member 200. When the basket wires 15 are restrained by organs or cavities in the body, the movable member 200 can be better pushed to rotate toward the central axis side of the basket wires 15, thereby pressing the basket wires 15 in the gap 210.

[0072] According to an alternative embodiment, referring to Figure 6 , Figure 7 The basket head 100 is movably provided with a linkage member 110. When the linkage member 110 moves relative to the basket head 100, the linkage member 110 can push the movable member 200 to switch from a fixed state to a released state. Exemplarily, the linkage member 110 is slidably connected to the basket head 100. When the linkage member 110 slides relative to the basket head 100, it can push the movable member 200 to rotate, thereby switching the movable member 200 from a fixed state to a released state. For example, the linkage member 110 is slidably provided on the basket head 100 in a direction approaching or moving away from the basket head 100, and is located between at least two movable members 200. A guiding surface, such as an inclined surface, is provided between the linkage member 110 and the movable member 200. By allowing the linkage member 110 to slide relative to the basket head 100, the linkage member 110 pushes the movable member 200 to rotate under the action of the guiding surface, thereby achieving the purpose of switching the movable member 200 from a fixed state to a released state.

[0073] In some embodiments, the linkage member 110 is hinged to the basket head 100, and the linkage member 110 has a pushing portion 111. When the linkage member 110 rotates, the pushing portion 111 can move to a side away from the central axis of the basket head 100. By arranging the pushing portion 111 between at least two movable members 200, and allowing the linkage member 110 to rotate, the pushing portion 111 can contact the movable member 200, so that when the linkage member 110 rotates, the movable member 200 is pushed to rotate away from the central axis of the basket head 100 by the pushing portion 111, so as to achieve the purpose of switching the movable member 200 from the fixed state to the released state. Exemplarily, the number of movable members 200 and the linkage member 110 is two, and the two movable members 200 are arranged opposite to each other, and the linkage member 110 is located between the two movable members 200. The linkage member 110 and the movable members 200 are arranged one by one, and one linkage member 110 is located on a side close to one of the movable members 200, and the other linkage member 110 is located on a side close to the other movable member 200. The pushing portion 111 faces the corresponding movable member 200 . When the linkage member 110 rotates, the pushing portion 111 can push the corresponding movable member 200 to rotate, so that the movable member 200 switches from a fixed state to a released state.

[0074] In some embodiments, reference Figure 6 , Figure 7 The driving member 300 includes a cutting wire 310, which is connected to the linkage member 110 to drive the linkage member 110 to move relative to the basket head 100. The cutting wire 310 and the basket wire 15 together form a basket. When the cutting wire 310 is pulled, the cutting wire 310 can move relative to the basket wire 15, so that the linkage member 110 can move relative to the basket head 100. The cutting wire 310 can pull the linkage member 110 to move, thereby pushing the movable member 200 to rotate. It can be understood that the cutting wire 310 pulling the linkage member 110 to move can be pulling the linkage member 110 to slide relative to the basket head 100, or pulling the linkage member 110 to rotate relative to the basket head 100. The specific way of pulling the linkage member 110 to move depends on the setting mode of the movable member 200. For example, if the linkage member 110 is hinged to the basket head 100, the cutting wire 310 can pull the linkage member 110 to rotate relative to the basket head 100.

[0075] In some schemes, when the tensile force on the cut wire 310 exceeds a predetermined value, the cut wire 310 is disconnected from the linkage 110. It is understandable that a component with a tensile strength within a required range can be selected as the cut wire 310, so as to achieve the effect of breaking the cut wire 310 after the tensile force on the cut wire 310 exceeds a preset value. It is understandable that the tensile strength of the cut wire 310 is related to the tensile strength of its weakest part. In this embodiment, the tensile strength of the local area of ​​the cut wire 310 is reduced by special treatment of the local area of ​​the cut wire 310, thereby controlling the tensile force required when the cut wire 310 breaks. For example, an annular groove is set on the cut wire 310, so that the strength of the annular groove part is significantly weakened, thereby controlling the breakage of the cut wire 310. In addition, by adjusting the position of the annular groove, the breaking part of the cut wire 310 can also be controlled to meet specific needs. It should be pointed out that the local part of the cut wire 310 can also be set to be thinner, or the local material of the cut wire 310 can be changed to achieve the same effect.

[0076] According to an alternative embodiment, referring to Figure 6 , Figure 7, the outer sleeve 320 is provided on the outer jacket of the cutting wire 310, and the cutting wire 310 can move relative to the outer sleeve 320 along the central axis direction of the cutting wire 310, and the outer sleeve 320 and the basket wire 15 together constitute a basket, and the outer sleeve 320 can be linked with the basket wire 15 to enable the stone extraction basket 10 to be unfolded or stored. It can be understood that the outer sleeve 320 and the basket wire 15 together constitute a basket, which means that the basket includes the outer sleeve 320 and the basket wire 15. When the basket needs to be unfolded or stored, the basket wire 15 and the outer sleeve 320 need to be synchronously driven to move so that the basket can be unfolded or stored. Exemplarily, the outer sleeve 320 can be understood as a thicker basket wire 15, and the thicker basket wire 15 is set to a hollow state. The cutting line is inserted into the thicker basket wire 15. It can be understood that the material of the outer sleeve 320 can be consistent with the basket wire 15, or different from the basket wire 15. However, the outer sleeve 320 has similar or consistent properties with the basket wire 15. For example, the outer sleeve 320 is also elastic, and the outer sleeve 320 has a preset initial shape that is the same as or similar to the basket wire 15, so that the outer sleeve 320 and the basket wire 15 can form a basket together, thereby being able to capture stones together with the basket wire 15.

[0077] The expansion or storage of the stone-collecting net basket 10 means that the net basket itself can be expanded or stored during use. When the net basket is stored, it can be represented as the stone-collecting net basket 10 is in a stored state; when the net basket is expanded, it can be represented as the stone-collecting net basket 10 is in an expanded state.

[0078] In some embodiments, the cutting wire 310 is provided with a breaking notch 311 near the end of the linkage 110, and when the cutting wire 310 is pulled, the cutting wire 310 can break at the breaking notch 311. The breaking notch 311 can make the cutting wire 310 break easily, so that when the force applied to the cutting wire 310 is greater than a preset value, the cutting wire 310 breaks.

[0079] It is understood that when it is necessary to capture the stone, the basket wire 15 and the outer sleeve 320 are driven to move out of the sheath tube 14 at the same time, so that the basket is unfolded, thereby allowing the stone to enter the basket. Then, the basket wire 15 and the outer sleeve 320 are driven to move into the sheath tube 14 at the same time until the stone is captured. Then, by moving the sheath tube 14, the basket wire 15 and the outer sleeve 320 are driven to move out of the body together to remove the stone from the body.

[0080] In the process of removing the stone from the body, if the stone and the basket are stuck, the basket needs to be disengaged from the stone. At this time, the cutting wire 310 can be driven so that the cutting wire 310 pulls the linkage 110 to move relative to the basket head 100 under the action of external force. When the linkage 110 moves, the movable part 200 is pushed to rotate, thereby releasing the basket wire 15 in the gap 210, so that the basket wire 15 is disengaged from the basket head 100. Subsequently, the external force applied to the cutting wire 310 is increased until the cutting wire 310 breaks from the fracture notch 311. At this time, the cutting wire 310 and the basket wire 15 are separated from the basket head 100, so that the stone can be removed from the basket, so that the stone removal basket 10 can be removed from the body, so that other lithotripsy equipment can be inserted later to crush the stone. After the stone is crushed, it can be taken out by a new stone removal basket 10. When the gravel is removed by the new stone removal basket 10, the basket head 100 remaining in the body also needs to be removed.

[0081] According to an alternative embodiment, referring to Figure 6 , Figure 7 The movable member 200 is provided with a binding member 230, and the outer sleeve 320 is located between adjacent binding members 230. When the movable member 200 is in a fixed state, the outer sleeve 320 is pressed between the binding members 230. For example, the proximal end of the outer sleeve 320 is located at the sheath tube 14 (combined with Fig.12 ) and can move with the basket wire 15. The distal end of the outer sleeve 320 is compressed by the binding member 230 to fix the distal end of the outer sleeve 320 to the basket head 100. It can be understood that if the binding member 230 releases the distal end of the outer sleeve 320, the outer sleeve 320 will be connected to the basket head 100 under the action of the cutting wire 310.

[0082] The connection between the outer sleeve 320 and the basket head 100 mentioned here does not mean that the outer sleeve 320 is directly connected to the basket head 100, but because the cutting wire 310 is connected to the linkage 110, the outer sleeve 320 is sleeved outside the cutting wire 310 and the linkage 110 is connected to the basket head 100, so it can be regarded as the outer sleeve 320 is connected to the basket head 100. Therefore, if the cutting wire 310 is disconnected from the linkage 110, the distal end of the outer sleeve 320 will be in a free state, so that the outer sleeve 320 and the cutting wire 310 can be received in the sheath tube 14.

[0083] According to an optional embodiment, when the movable member 200 is in a fixed state, adjacent binding members 230 contact each other. The binding members 230 are provided with glue, and the adjacent binding members 230 can be adhered to each other by the glue. The glue becomes invalid after contacting with water for a predetermined time, so that the adjacent binding members 230 can be separated from each other. Since the movable member 200 is movably connected to the basket head 100, when the movable member 200 moves relative to the basket head 100, it will also drive the binding members 230 to move relative to the basket head 100. Exemplarily, when adjacent movable members 200 rotate in a direction away from each other, the adjacent binding members 230 will be driven away from each other; conversely, when adjacent movable members 200 rotate in a direction close to each other, the adjacent binding members 230 will be driven close to each other, so that the adjacent binding members 230 can contact each other.

[0084] Due to the complex internal environment, the movable member 200 may rotate and loosen the basket wire 15 due to the action of the internal tissue, which will be detrimental to the capture of stones. In order to avoid this, the adjacent binding members 230 are glued together by setting glue. Since the binding member 230 is connected to the movable member 200, the adjacent movable member 200 can be immobilized, thereby preventing the basket wire 15 from being accidentally loosened.

[0085] However, in some special cases, the movable part 200 needs to rotate relative to the basket head 100, so a special glue (such as hydrosol, the adhesive force will decrease or even fail after being in contact with water for a period of time) is used to make the restraining part 230 fail after being in contact with body fluids in the body for a certain period of time, so as not to affect the movement of the movable part 200. During use, if the operation goes smoothly, the stone removal basket 10 will be taken out of the body before the glue fails, and the basket wire 15 will not be separated from the basket head 100, thereby achieving the purpose of capturing stones. If there is a problem with the operation, the stone cannot be removed, and the operation time is prolonged, the glue will fail after being in contact with body fluids for more than a predetermined time, allowing the movable part 200 to move. At this time, the movable part 200 is driven to move by the cutting wire 310, so that the basket wire 15 is separated from the basket head 100.

[0086] A second aspect of this embodiment provides a detailed description of a stone-removing net basket.

[0087] See also Fig.12A stone removal net includes a stone removal net basket fixing member in the above embodiment, and also includes a handle 11 and a sheath 14, the sheath 14 has a receiving opening 14a, the basket wire 15, the outer sleeve 320 and the cutting wire 310 can be deployed or stored through the receiving opening 14a, the handle 11 is movably provided with a first push button 12 and a second push button 13, when the first push button 12 is moved, the basket wire 15, the outer sleeve 320 and the cutting wire 310 can be deployed or stored through the receiving opening 14a; when the second push button 13 is moved, the cutting wire 310 can be moved relative to the outer sleeve 320 to break the cutting wire 310.

[0088] 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 stone retrieval basket fixing member, applied to a stone retrieval basket (10), the stone retrieval basket (10) comprising a basket wire (15), the basket wire (15) having elasticity, characterized in that: include: A basket head (100) for connecting to the distal end of the basket wire (15); A movable member (200) movably connected to the basket head (100) to switch from a fixed state to a released state; as well as, A driving member (300) for driving the movable member (200) to move relative to the basket head (100), so that the movable member (200) switches from a fixed state to a released state; Wherein, when the movable member (200) is in a fixed state, the movable member (200) can fix the basket wire (15) to the basket head (100); When the movable member (200) is in a released state, the basket head (100) can be disengaged from the basket wire (15); The movable member (200) is hinged to the net basket head (100), and when the movable member (200) switches from a released state to a fixed state, adjacent movable members (200) approach each other; the number of the movable members (200) is at least two; The net basket head (100) is movably provided with a linkage member (110); when the linkage member (110) moves relative to the net basket head (100), the linkage member (110) can push the movable member (200) to switch from a fixed state to a released state.

2. A stone removal basket fixing according to claim 1, characterized in that: A gap (210) is formed between the movable member (200) and the basket head (100), and when the movable member (200) is in a fixed state, the basket wire (15) is clamped in the gap (210); When the movable member (200) is in a released state, the clamping slit (210) opens, so that the basket wire (15) can escape from the clamping slit (210).

3. A stone removal basket fixing member according to claim 2, characterized in that: The basket head (100) and / or the movable part (200) are provided with a fitting groove (211) for fitting with the outer wall of the basket wire (15); when the basket wire (15) is located in the slit (210), the basket wire (15) is located in the fitting groove (211).

4. The stone retrieval basket fixing member according to claim 1, characterized in that: The movable member (200) is provided with a through hole (220), and part of the basket wire (15) is located in the through hole (220) so as to push adjacent movable members (200) closer to each other.

5. A stone retrieval basket fixing according to claim 4, characterized in that: The movable member (200) is hinged to the basket head (100) via a hinge shaft (400), and the through hole (220) includes an inlet (221) and an outlet (222); wherein: The through hole (220) is located on a side of the movable member (200) away from the hinge shaft (400); and / or, in the process of the movable member (200) switching from the fixed state to the released state, the movable member (200) rotates toward the side away from the central axis of the net basket head (100), the inlet (221) is located on the side of the movable member (200) close to the central axis of the net basket head (100), and the outlet (222) is located on the side of the movable member (200) away from the central axis of the net basket head (100); And / or, the distance between the outlet (222) and the hinge axis (400) is smaller than the distance between the inlet (221) and the hinge axis (400).

6. The stone retrieval basket fixing member according to claim 1, characterized in that: The driving member (300) comprises a cutting wire (310), and the cutting wire (310) is connected to the linkage member (110) to drive the linkage member (110) to move relative to the basket head (100); When the cutting wire (310) is pulled, the cutting wire (310) can move relative to the basket wire (15), so that the linkage member (110) can move relative to the basket head (100); When the tension applied to the cutting wire (310) exceeds a predetermined value, the cutting wire (310) is disconnected from the linkage member (110).

7. A stone retrieval basket fixing according to claim 6, characterized in that: The outer sleeve (320) is disposed on the outer sleeve of the cutting wire (310), and the cutting wire (310) can move relative to the outer sleeve (320) along the central axis direction of the cutting wire (310), and the outer sleeve (320) and the basket wire (15) together form a basket, and the outer sleeve (320) can be linked with the basket wire (15) to enable the stone removal basket (10) to be unfolded or stored; The cutting wire (310) is provided with a breaking notch (311) at the end close to the linkage member (110); when the cutting wire (310) is pulled, the cutting wire (310) can break at the breaking notch (311).

8. The stone retrieval basket fixing member according to claim 7, characterized in that: The movable part (200) is provided with a binding part (230), and the outer sleeve (320) is located between adjacent binding parts (230). When the movable part (200) is in a fixed state, the outer sleeve (320) is pressed between the binding parts (230).

9. The stone retrieval basket fixing member according to claim 8, characterized in that: When the movable member (200) is in a fixed state, adjacent restraining members (230) are in contact with each other; The binding members (230) are provided with glue, and adjacent binding members (230) are adhered to each other by the glue. The glue becomes ineffective after being in contact with water for a predetermined time, so that adjacent binding members (230) can be separated from each other.

10. A stone-removing basket, characterized in that: The invention relates to a stone removal basket fixing device as claimed in claim 7, further comprising a handle (11) and a sheath tube (14), wherein the sheath tube (14) has a receiving and releasing opening (14a), and the basket wire (15), the outer sleeve (320) and the cutting wire (310) can be unfolded or stored through the receiving and releasing opening (14a); the handle (11) is movably provided with a first push button (12) and a second push button (13), and when the first push button (12) is moved, the basket wire (15), the outer sleeve (320) and the cutting wire (310) can be unfolded or stored through the receiving and releasing opening (14a); when the second push button (13) is moved, the cutting wire (310) can be moved relative to the outer sleeve (320) to break the cutting wire (310).

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