Mesh basket structure and medical instrument

Abstract

The utility model provides a mesh basket structure and a medical instrument. The mesh basket structure comprises a plurality of mesh wires, a first binding piece and a second binding piece, the near ends and the far ends of all the mesh wires penetrate through the first binding piece and the second binding piece respectively, the near ends of all the mesh wires are bound together through the first binding piece, the far ends of all the mesh wires are bound together through the second binding piece, and therefore the mesh basket structure is formed. Besides, any net wire comprises two sub net wires, and when the net basket structure is in an unfolded state, the two sub net wires are mutually wound on the far-end side and are arranged at intervals on the near-end side, that is, the sub net wires are mutually wound on the far-end side, so that the supporting performance of the whole net basket structure is improved, and the problems of wire breakage, deformation and the like are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of net basket structure and medical instrument. BACKGROUND

[0002] With the popularity of choledochoscope, in ERCP, direct vision operation in biliary tract is the main development trend in future, and under visualization, the operation such as grabbing is more accurate, and efficiency improvement is one of the main changes brought by it. Stone extraction basket, as the mainstream product of stone solution, is one of the main products of under-scope consumables. At present, stone extraction basket mainly has four silk and eight silk structure, compared two structures, eight silk structure is superior to four silk in support, the size range of stone that can be grabbed and other performances. Although the support of eight silk structure is improved compared with four silk structure, but when grabbing large size, large weight stone, the support of eight silk structure is still insufficient, there are problems such as deformation of net basket and broken wire of net basket.

[0003] It should be noted that the information disclosed in the background section of the invention is only intended to deepen the understanding of the general background of the utility model, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0004] The utility model aims at providing a kind of net basket structure and medical instrument that can improve support, avoid broken wire, deformation and other problems.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of net basket structure, including multiple net wires, first binding part and second binding part;The proximal end and distal end of all the net wires are respectively provided in the first binding part and the second binding part, the first binding part binds the proximal end of all the net wires together, and the second binding part binds the distal end of all the net wires together;Any net wire includes two sub-wires, when the net basket structure is in the unfolded state, the two sub-wires are twisted on the distal end side, and are spaced apart on the proximal end side.

[0006] Optionally, it further includes head end, the head end is sleeved in the proximal end of the first binding part, and the proximal end of the head end is smooth.

[0007] Optionally, it further includes connecting portion, the connecting portion is located at the distal end of the second binding part;One end of the connecting portion is connected with the connection of the distal end of the net wire, and the other end of the connecting portion is used to be connected with inner tube.

[0008] Optionally, it further includes connecting portion, the connecting portion is formed by all the net wires being pressed after passing through the second binding part, and the connecting portion is used to be connected with inner tube.

[0009] Optionally, the number of the net wires is 4; and / or, the sub-net wires are nickel-titanium core wires; and / or, the net wires are braided wires.

[0010] To achieve the above object, the utility model provides a medical instrument, including handle part, inner tube, outer sheath and the basket structure as described above, the outer sheath is fixedly connected with the handle part, the inner tube is arranged in the outer sheath, the distal end of the inner tube is connected with handle part, the handle part drives the inner tube movement, the basket structure is equipped in the proximal end of the inner tube.

[0011] Optionally, the handle part includes rotating piece, push-pull piece and fixed part, the rotating piece is connected with the push-pull piece slidingly, the push-pull piece moves along the axial direction of the rotating piece, the rotating piece is connected with the fixed part rotationally, the outer sheath is fixedly connected with the fixed part, and the inner tube is fixedly connected with the push-pull piece.

[0012] Optionally, the handle part further includes a guide piece, the guide piece is connected with the fixed part, and the guide piece is located on the side of the fixed part away from the rotating piece.

[0013] Optionally, the handle part further includes a fastening piece and an inner tube fixing piece, a through hole is formed in the rotating piece, the inner tube fixing piece is arranged in the through hole and fixedly connected with the push-pull piece, and the inner tube is fixedly connected with the push-pull piece through the fastening piece.

[0014] Optionally, the utility model further includes a connecting piece, the connecting piece is sleeved on the outer side of the inner tube, and the basket structure is connected with the inner tube through the connecting piece; and / or, the utility model further includes a protective sleeve, the protective sleeve is sleeved on the outer side of the distal end of the inner tube, and the protective sleeve is connected with the handle part.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The basket structure and the medical instrument described above, the basket structure includes a plurality of net wires, a first binding piece and a second binding piece, the proximal ends and the distal ends of all the net wires are arranged in the first binding piece and the second binding piece respectively, the first binding piece binds the proximal ends of all the net wires together, and the second binding piece binds the distal ends of all the net wires together, thereby forming the structure of the basket. In addition, any net wire includes two sub-net wires, when the basket structure is in the unfolded state, the two sub-net wires are wound around each other on the distal end side and are arranged at intervals on the proximal end side, that is, the sub-net wires are wound around each other on the distal end side, which improves the supportability of the entire basket structure and avoids problems such as wire breakage and deformation, and the two sub-net wires are arranged at intervals on the proximal end side, thereby making the intervals between the net wires more suitable and facilitating grasping. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure diagram of a mesh basket structure provided by an embodiment of the present application is shown in the figure.

[0018] Figure 2 A structure diagram of a medical instrument provided by an embodiment of the present application is shown in the figure. Figure 1 A side view of the mesh basket structure shown in the figure.

[0019] Figure 3 A structure diagram of a medical instrument provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0020] The conveying track and the conveying device provided by the present application are further described in detail below in combination with the drawings and the specific embodiments. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the drawings are very simplified and all use non-precise proportions, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more apparent and easy to understand, please refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the conditions of the implementation of the present application. Any modification of structure, change of proportion relationship or adjustment of size, as long as it is the same or similar to the effect and purpose that can be produced by the present application, should still fall within the scope of the technical content disclosed by the present application. The specific design features of the present application disclosed in this paper include, for example, specific dimensions, directions, positions and shapes, which will be determined partly by the specific application and use environment. In addition, in the following description of the embodiments, sometimes the same reference signs are used to represent the same parts or parts with the same function between different drawings, and the repeated description is omitted. In the present specification, similar signs and letters are used to represent similar items, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. In addition, if the method described in this paper includes a series of steps, and the order of these steps presented in this paper is not necessarily the only order in which these steps can be performed, and some of the described steps can be omitted and / or some other steps not described in this paper can be added to the method.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “one,” and “the” include plural objects. The term “or” is generally used to mean “and / or.” The term “several” is generally used to mean “at least one.” The term “at least two” is generally used to mean “two or more.” The term “multiple” is generally used to mean “at least two.”

[0022] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not the indication or implication of the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore can not be understood as the limitation to the utility model. In the description of the utility model, unless otherwise explicitly specified and limited, the term "mounting", "connected", "connection", "fixed" should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances. In addition, in the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include the direct contact of the first and second features, also can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0023] Please refer to Figure 1 and Figure 2The basket structure of one embodiment includes a plurality of wires 301, a first binding member 303, and a second binding member 302. The proximal ends and the distal ends of all the wires 301 are respectively threaded through the first binding member 303 and the second binding member 302, the first binding member 303 binds the proximal ends of all the wires 301 together, and the second binding member 302 binds the distal ends of all the wires 301 together. In this embodiment, the distal end refers to the end close to the operator, and the proximal end refers to the end away from the operator. The functions of the first binding member 303 and the second binding member 302 are to bundle the two ends of the wire 301 together, and the two ends of the wire 301 can be fixed together with the first binding member 303 and the second binding member 302 by crimping or the like. It should be noted that the second binding member 302 binds the distal ends of all the wires 301 together, wherein the distal end of the wire 301 can be the distal end portion of the wire 301, or a position close to the distal end of the wire 301. When the distal end of the wire 301 is the position close to the distal end of the wire 301, that is, the second binding member 302 is located at a position close to the distal end portion of the wire 301, there is still a part of the wire 301 on the distal end side of the second binding member 302, and all the parts of the wire 301 are intertwined together.

[0024] Any wire 301 includes two sub-wires, which are intertwined with each other on the distal end side and are spaced apart on the proximal end side when the basket structure is in an expanded state. In other words, after the wire 301 is bound by the first binding member 303 and the second binding member 302, the part of the wire 301 close to the second binding member 302 on the distal end side is intertwined with each other, and the other part close to the first binding member 303 on the proximal end side is spaced apart, that is, on the proximal end side, the two sub-wires are not intertwined and are still in a separated state.

[0025] The above basket structure includes a plurality of wires 301, a first binding member 303, and a second binding member 302, the proximal ends and the distal ends of all the wires 301 are respectively threaded through the first binding member 303 and the second binding member 302, the first binding member 303 binds the proximal ends of all the wires 301 together, and the second binding member 302 binds the distal ends of all the wires 301 together, thereby forming the structure of the basket. In addition, any wire 301 includes two sub-wires, which are intertwined with each other on the distal end side and are spaced apart on the proximal end side when the basket structure is in an expanded state, that is, the sub-wires are intertwined on the distal end side, improving the supportability of the entire basket structure and avoiding problems such as wire breakage and deformation, and the two sub-wires are spaced apart on the proximal end side, thereby making the spacing between the wires more suitable and facilitating grasping.

[0026] Further, the basket structure further comprises a head end 304, the head end 304 is sleeved on the proximal end of the first binding member 303, and the proximal end of the head end 304 is smooth. The head end 304 and the first binding member 303 can be fixedly connected by crimping or the like. By arranging the head end 304 and making the head end 304 smooth, the lesion site can be protected, and the stimulation of the lesion site when the basket structure is inserted can be reduced.

[0027] In an embodiment, the basket structure further comprises a connecting portion 305, the connecting portion 305 is formed by mutual extrusion of the distal ends of all the wires 301 after passing through the second binding member 302, and the connecting portion 305 is used to be connected with the inner tube, so that the movement of the inner tube can drive the movement of the basket structure. Specifically, for example, the number of wires 301 is two, and each wire comprises two sub-wires, so that the distal ends of the four sub-wires are wound together to form the connecting portion 305. At this time, the second binding member 302 is sleeved on all the wires, that is, all the sub-wires pass through the second binding member 302, and the portions of the sub-wires located on the distal end side of the second binding member 302 are extruded together to form the connecting portion 305. With this arrangement, the structure is simple and easy to operate. Further, the outer part of all the connecting portions 305 is attached with a heat shrink tube, and all the sub-wires are extruded together by the heat shrink tube, further avoiding the dispersion of the sub-wires.

[0028] In another embodiment, the connecting portion 305 is located at the distal end of the second binding member 302, one end of the connecting portion 305 is connected with the connecting portion of the distal end of the wire, and the other end of the connecting portion 305 is used to be connected with the inner tube. That is, one end of the connecting portion 305 is connected with the distal end of the wire, that is, connected with the second binding member 302, and the connection can be fixedly connected by crimping or the like.

[0029] In an embodiment, the number of wires 301 is four, as shown in FIG. 2, and each wire comprises two sub-wires. Figure 2As shown, the four wires are wire 3011, wire 3012, wire 3013 and wire 3014, and the four wires have the same shape. Wire 3011 is composed of sub-wire 3011a and 3011b, wire 3012 is composed of sub-wire 3012a and 3012b, wire 3013 is composed of sub-wire 3013a and 3013b, and wire 3014 is composed of sub-wire 3014a and 3014b. The distal ends of sub-wire 3011a, 3011b, 3012a, 3012b, 3013a, 3013b, 3014a and 3014b are intertwined with each other, which can greatly improve the supportability of the basket structure and reduce the cost of the basket structure. The proximal ends of sub-wire 3011a, 3011b, 3012a, 3012b, 3013a, 3013b, 3014a and 3014b are spaced apart from each other, and from the proximal end to the distal end, they form an eight-wire pattern. That is, in the axial direction of the basket structure, the part between the first binding member 303 and the second binding member 302 has a four-wire structure at the distal end and an eight-wire structure at the proximal end, thereby meeting the supportability and the size range of the graspable stones, and further avoiding the problem of basket structure fracture. Further, the sub-wire can be a nickel-titanium core wire, which can improve the strength of the basket structure and further improve the supportability. The wire can be a woven wire, that is, the intertwined part of the wire is formed by mold weaving, that is, the distal ends of the two sub-wires corresponding to each wire are intertwined with each other by mold weaving. The use of woven wire can improve the supportability, avoid deformation and wire breakage of the basket structure, and compared with the existing cutting method, it can avoid stress concentration points in the wire, thereby avoiding fracture caused by stress concentration points during use, and also reducing the manufacturing cost caused by laser cutting and other methods.

[0030] A medical instrument of an embodiment is shown as Figure 3 As shown, it comprises a handle part, an inner tube 201, an outer sheath tube 203 and the above-mentioned basket structure. The outer sheath tube 203 is fixedly connected with the handle part, the inner tube 201 is arranged in the outer sheath tube 203, the distal end of the inner tube 201 is connected with the handle part, the handle part drives the movement of the inner tube 201, and the basket structure is arranged at the proximal end of the inner tube 201. Therefore, when the handle part drives the movement of the inner tube 201, the inner tube 201 drives the movement of the basket structure, the outer sheath tube 203 is inserted into the lesion site through an endoscope, and the handle part drives the movement of the basket structure through the inner tube 201, thereby realizing the stone extraction of the basket structure in the lesion site. The basket structure in the present embodiment is as described in the above embodiment, and will not be described here. The medical instrument has high structural strength and supportability, the basket structure is not easy to break, and it can be applied to various stone sizes. The material of the inner tube 201 can be nickel-titanium alloy or stainless steel synchronous wire, etc. The outer sheath tube 203 can be fixed on the handle part by adhesion or other methods.

[0031] Specifically, the handle part comprises a rotating member 101, a push-pull member 102 and a fixed member 105. The rotating member 101 is in sliding connection with the push-pull member 102, and the push-pull member 102 moves forward and backward along the axial direction of the rotating member 101. The inner tube 201 is fixedly connected with the push-pull member 102, so that when the push-pull member 102 moves forward and backward, the inner tube 201 can be driven to move forward and backward, and in turn the basket structure is driven to move forward and backward. The rotating member 101 is in rotational connection with the fixed member 105, and the outer sheath tube 203 is fixedly connected with the fixed member 105, so that when the rotating function is used, the fixed member 105 is pressed to remain stationary, and the rotating member 101 rotates relative to the fixed member 105. The rotating member 101 drives the inner tube 201 to rotate, and in turn drives the basket structure to rotate. Wherein, the forward and backward movement in the embodiment refers to the movement along the central axis direction of the outer sheath tube 203, i.e. the movement towards the proximal end or the distal end, so as to realize the opening and closing of the basket structure. In the initial state, the basket structure is compressed on the inner tube 201, and the push-pull member 102 moves towards the proximal end, so that the basket structure is released and in an unfolded state. During the stone removal process, the basket structure can be driven to move forward and backward by the push-pull member 102, and the basket structure can be driven to rotate by the rotation of the rotating member 101, so as to realize the stone removal.

[0032] Wherein, the rotating member 101 can be provided with a rotating hole. When in use, the operator can insert the fingers into the rotating hole to facilitate the rotating movement of the rotating member 101 relative to the fixed member 105, and the operation is convenient. In an embodiment, the push-pull member 102 has a cavity penetrating through both ends thereof, and the rotating member 101 penetrates through the cavity, so that the push-pull member 102 is arranged on the rotating member 101. At this time, the push-pull member 102 is provided with a push-pull hole on the part located on each side of the rotating member 101. When in use, the operator can insert the fingers into the push-pull hole to facilitate the operation.

[0033] Further, the handle part further comprises a guide member 106, which is connected with the fixed member 105 and located on the side away from the rotating member 101. At this time, the outer sheath tube 203 is fixedly connected with the fixed member 105 after penetrating through the guide member 106. Through the arrangement of the guide member 106, the guide function can be achieved when the medical instrument is inserted into the endoscope.

[0034] In an embodiment, the handle part further comprises a fastener 103 and an inner tube fixing member 104, the rotating member 101 is provided with a through hole, and the inner tube fixing member 104 is arranged in the through hole and fixedly connected with the push-pull member 102. Wherein, after the inner tube fixing member 104 is arranged in the through hole, the two ends of the inner tube fixing member 104 can be fixedly connected with the push-pull member through clamping or the like, so that when the push-pull member 102 needs to move along the direction of the central axis of the outer sheath 203, the inner tube fixing member 104 moves forward and backward in the through hole, thereby driving the push-pull member 102 to move forward and backward. Through the cooperation of the inner tube fixing member 104 and the through hole, the structure is simple and easy to process. Further, the fastener 103 can fix the inner tube 201 on the push-pull member 102 through pressing or the like, so as to realize the forward and backward movement of the push-pull member 102. In this embodiment, when the handle part drives the basket structure to move forward and backward to realize the opening and closing of the basket structure, the push-pull member 102 moves forward and backward, and the push-pull member 102, the fastener 103 and the inner tube fixing member 104 move forward and backward together, thereby driving the inner tube 201 to move; when the handle part drives the basket structure to rotate, the fixing member 105 and the guide member 106 are fixed, and when the rotating member 101 rotates relative to the fixing member 105, the rotating member 101, the push-pull member 102, the fastener 103 and the inner tube fixing member 104 rotate together, and then the inner tube 201 rotates.

[0035] In an embodiment, the medical instrument further comprises a connecting member 204, the connecting member 204 is sleeved outside the inner tube 201, and the basket structure is connected with the inner tube 201 through the connecting member 204. Specifically, as known from the above, the basket structure comprises a connecting part 305, at this time, the connecting part 305 is connected with the inner tube 201 through the connecting member 204, wherein the connecting member 204 can be a metal member. When the connecting part 305 is connected with the inner tube 201 through the connecting member 204, the connection mode can be crimping, bonding or the like.

[0036] Further, in an embodiment, the medical instrument further comprises a protective sleeve 202, the protective sleeve 202 is sleeved outside the distal end of the inner tube 201, and the protective sleeve 202 is connected with the handle part, that is, the protective sleeve 202 is close to the distal end of the inner tube 201, thereby supporting the part of the inner tube 201 in the handle part, and ensuring that the inner tube 201 will not be bent.

[0037] The basket structure and the medical device, the basket structure comprises a plurality of wires, a first binding member and a second binding member, the proximal end and the distal end of all the wires are respectively arranged in the first binding member and the second binding member, the first binding member binds the proximal end of all the wires together, and the second binding member binds the distal end of all the wires together, thereby forming the structure of the basket. In addition, any wire comprises two sub-wires, when the basket structure is in an unfolded state, the two sub-wires are wound with each other on the distal end side, and are spaced apart on the proximal end side, that is, the sub-wires are wound with each other on the distal end side, improving the supportability of the entire basket structure, avoiding problems such as wire breakage and deformation, and the two sub-wires are spaced apart on the proximal end side, so that the spacing between the wires is more suitable for grasping.

[0038] It should be noted that in the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0039] It should also be noted that the above description is only a description of the preferred embodiments of the present application, and not any limitation on the scope of the present application, any modification or modification of the above disclosure by the person skilled in the art belongs to the protection scope of the present application. Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations fall within the scope of the present application and its equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A basket structure, characterized by, The mesh basket structure comprises a plurality of mesh wires, a first binding member and a second binding member; the proximal ends and the distal ends of all the mesh wires are respectively arranged in the first binding member and the second binding member; the first binding member binds the proximal ends of all the mesh wires together; and the second binding member binds the distal ends of all the mesh wires together; any mesh wire comprises two sub-mesh wires, and when the mesh basket structure is in an unfolded state, the two sub-mesh wires are wound with each other at the distal end side and are arranged in a spaced manner at the proximal end side.

2. The basket structure of claim 1, wherein, The mesh basket structure further comprises a head end, the head end is sleeved on the proximal end of the first binding member, and the proximal end of the head end is in a smooth shape.

3. The basket structure of claim 1, wherein, The mesh basket structure further comprises a connecting portion, the connecting portion is located at the distal end of the second binding member; one end of the connecting portion is connected with the connection between the distal end of the mesh wire and the second binding member, and the other end of the connecting portion is used for being connected with an inner tube.

4. The basket structure of claim 1, wherein, The mesh basket structure further comprises a connecting portion, the connecting portion is formed by mutual extrusion of the distal ends of all the mesh wires after passing through the second binding member, and the connecting portion is used for being connected with an inner tube.

5. The basket structure of claim 1, wherein, The number of the mesh wires is 4; and / or the sub-mesh wire is a nickel-titanium core wire; and / or the mesh wire is a braided wire.

6. A medical device, comprising: The mesh basket structure comprises a handle portion, an inner tube, an outer sheath tube and the mesh basket structure according to any one of claims 1-5, the outer sheath tube is fixedly connected with the handle portion, the inner tube is arranged in the outer sheath tube, the distal end of the inner tube is connected with the handle portion, and the handle portion drives the movement of the inner tube; and the mesh basket structure is arranged at the proximal end of the inner tube.

7. The medical device of claim 6, wherein, The handle portion comprises a rotating member, a push-pull member and a fixing member; the rotating member is in sliding connection with the push-pull member, the push-pull member moves forward and backward along the axial direction of the rotating member, and the rotating member is in rotational connection with the fixing member; the outer sheath tube is fixedly connected with the fixing member, and the inner tube is fixedly connected with the push-pull member.

8. The medical device of claim 7, wherein, The handle portion further comprises a guide member, the guide member is connected with the fixing member, and the guide member is located on the side of the fixing member away from the rotating member.

9. The medical device of claim 7, wherein, The handle portion further comprises a clamping member and an inner tube fixing member, a through hole is formed in the rotating member, the inner tube fixing member is arranged in the through hole and is fixedly connected with the push-pull member, and the inner tube is fixedly connected with the push-pull member through the clamping member.

10. The medical device of claim 6, wherein, The mesh basket structure further comprises a connecting member, the connecting member is sleeved outside the inner tube, and the mesh basket structure is connected with the inner tube through the connecting member; and / or the mesh basket structure further comprises a protective sleeve, the protective sleeve is sleeved outside the distal end of the inner tube, and the protective sleeve is connected with the handle portion.

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