Recovery device

Abstract

The application relates to a recovery device, comprising: a catching part, the catching part comprising a first catching wire and a second catching wire in a ring structure; when in a first state, at least part of the first catching wire and at least part of the second catching wire are separated in a radial direction, and a catching space with an opening is formed between the two; when in a second state, the distal ends of the first catching wire and the second catching wire cross, and the first catching wire and the second catching wire are wound with each other and form at least one winding part; and a control part connected with the catching part, used for controlling the first catching wire and the second catching wire to switch between the first state and the second state. According to the recovery device, electrode wires can be efficiently and firmly caught, the operation time is greatly shortened, and the success rate of the operation is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a recycling device. Background Technology

[0002] With the increasing number of implanted cardiac medical devices such as pacemakers, implantable cardioverter defibrillators, and cardiac resynchronization therapy, related complications such as lead breakage and lead wear are also increasing year by year, leading to a rapid increase in the demand for lead retrieval. Currently, there are two main methods for lead retrieval: the first is to remove the lead through open-chest surgery, which has disadvantages such as high surgical costs and significant trauma. The second method is intravenous interventional lead retrieval. Under angiographic conditions, the retrieval device is delivered intravenously to the lead location, then captures and loads the lead to be retrieved. Finally, the lead is withdrawn from the body along with the retrieval device, completing the lead retrieval. While this method has advantages such as low cost and minimal trauma, the continuous heartbeat during the procedure often causes the lead to move with the heartbeat, making it difficult for the retrieval device to efficiently and securely capture the lead. Summary of the Invention

[0003] The purpose of this invention is to at least solve the problem of recycling devices struggling to efficiently and securely capture electrode wires. To address the shortcomings of existing technologies, a recycling device is provided.

[0004] The technical problem solved by this invention is achieved through the following technical solution:

[0005] According to a first aspect of the present invention, a recovery apparatus is provided for capturing and recovering target objects within a living organism, comprising:

[0006] The capturing section includes a first capturing wire and a second capturing wire in a ring-shaped structure; when in a first state, at least a portion of the first capturing wire and at least a portion of the second capturing wire are radially separated, forming a capturing space with an opening between them; when in a second state, the distal ends of the first capturing wire and the second capturing wire cross, and the first capturing wire and the second capturing wire are intertwined to form at least one intertwined portion;

[0007] The control unit is connected to the capture unit and is used to control the first capture wire and the second capture wire to switch between the first state and the second state.

[0008] In some embodiments of the present invention, the capturing unit further has a third state. When the capturing unit is in the third state, at least a portion of the first capturing wire is inserted into the second capturing wire and the distal ends of the two cross each other. The control unit is also used to control the first capturing wire and the second capturing wire to switch between the first state, the second state and the third state.

[0009] In some embodiments of the present invention, the control unit includes a pusher connected to the capture unit and a first control wire and a second control wire;

[0010] The first capture wire includes a first fixed end and a first movable end, the first fixed end being connected to the pusher, and the first movable end being connected to the first control wire;

[0011] The second capture wire includes a second fixed end and a second movable end. The second fixed end is connected to the pusher, and the second movable end is connected to the second control wire.

[0012] The first control wire and the second control wire can move relative to the pusher to switch between the first capture wire, the second capture wire and the third capture wire.

[0013] In some embodiments of the present invention, the control unit further includes:

[0014] The handle is connected to the proximal end of the pusher;

[0015] A control component is movably connected to the handle and to the proximal ends of the first control wire and the second control wire, respectively. The control component is used to drive the first movable end and the second movable end to move through the first control wire and the second control wire, respectively, so as to expand or contract the annular structure of the first capture wire and the second capture wire, or to make one of the first movable end and the second movable end rotate around the other, thereby causing the first capture wire and the second capture wire to intertwine with each other.

[0016] In some embodiments of the present invention, the control unit further includes:

[0017] The first reinforcing tube is sleeved outside the first control wire;

[0018] And / or, the second reinforcing tube is sleeved outside the second control wire.

[0019] In some embodiments of the present invention, the first reinforcing tube may be axially movable relative to the first control wire, and the first reinforcing tube may be axially moved between the proximal and distal ends of the grasping part, and receive a portion of the first movable wire end; and / or, the second reinforcing tube may be axially movable relative to the second control wire, and the second reinforcing tube may be axially moved between the proximal and distal ends of the grasping part, and receive a portion of the second movable wire end.

[0020] In some embodiments of the present invention, the control unit further includes a nested member located between the distal end of the control component and the distal end of the pusher, the nested member having a receiving cavity, the nested member being fixedly connected to one of the first control wire and the second control wire, the other of the first control wire and the second control wire being radially confined in the receiving cavity of the nested member and movable axially relative to the nested member.

[0021] In some embodiments of the present invention, the control unit includes a plurality of nested members arranged at intervals along the axial direction.

[0022] In some embodiments of the present invention, the grasping part has a first side and a second side located on both sides of the central axis of the grasping part in the radial direction;

[0023] In the first state, the portion of the first capture wire located on the first side is separated from the portion of the second capture wire located on the first side, and a flare is formed on the first side, while the portion of the first capture wire located on the second side is close to the portion of the second capture wire located on the second side;

[0024] And / or, in the first state, the distal ends of the first and second capture wires are radially separated.

[0025] In some embodiments of the present invention, the first grasping wire includes a first movable wire and a first fixed wire. The first movable wire is connected to the first control wire. The proximal ends of the first movable wire and the first fixed wire are separated and connected at their distal ends. The second grasping wire includes a second movable wire and a second fixed wire 221. The second movable wire is connected to the second control wire. The proximal ends of the second movable wire and the second fixed wire are separated and connected at their distal ends. When the grasping part is in the first state, the maximum outward deviation of the first movable wire is less than the maximum outward deviation of the first fixed wire, and / or, the maximum outward deviation of the second movable wire is less than the maximum outward deviation of the second fixed wire.

[0026] In some embodiments of the present invention, the first capture wire and the second capture wire are respectively a ring structure with a closed distal end and an open proximal end.

[0027] In some embodiments of the present invention, a sleeve is further included, which is sleeved over the pusher, the first fixed end and the second fixed end, and fixes the first fixed end and the second fixed end to the pusher;

[0028] An axially extending through hole is defined between the inner wall surface of the sleeve and the outer peripheral surface of the pusher, and the first control wire and the second control wire are respectively movably inserted into the through hole.

[0029] In some embodiments of the present invention, the capturing part further includes a connecting part, the proximal end of the connecting part is located on the proximal side of the sleeve, and the distal end of the connecting part is connected to the first fixed end and the second fixed end respectively.

[0030] In some embodiments of the present invention, the outer peripheral surface of the pusher is provided with a radially protruding support post, and the connecting portion includes an arc-shaped wire segment wound around the support post, and a connection between one end of the arc-shaped wire segment and the first fixed end.

[0031] The first connecting segment and the second connecting segment are respectively connected to the other end of the arc-shaped wire segment and the second fixed end.

[0032] In some embodiments of the present invention, the connecting portion includes an arcuate wire segment that is circumferentially wound around the pusher, and a first connecting segment that is connected to one end of the arcuate wire segment and the first fixed end, and a second connecting segment that is connected to the other end of the arcuate wire segment and the second fixed end.

[0033] Along the radial direction, the grasping part has a first side and a second side located on both sides of the central axis of the pusher, the arc-shaped wire segment is located on the first side, and the first fixed end and the second fixed end are located on the second side.

[0034] In some embodiments of the present invention, the retrieval device further includes a conduit, the proximal end of which is connected to the handle. The conduit has a first inner cavity and a second inner cavity extending axially. The pusher is slidably inserted into the first inner cavity and is axially movable relative to the conduit to drive the grabbing part to move axially relative to the conduit, so that the grabbing part can be completely contained within the conduit or released from the conduit. The first control wire and the second control wire are movably inserted into the second inner cavity.

[0035] According to the retrieval device proposed in this invention, the first and second grasping wires, due to their second state, can confine the target object within a grasping space between them. The size of this grasping space is adjustable; by reducing the size of the grasping space, the first and second grasping wires can exert a clamping force on the target object, thereby firmly confining the target object between them. The first and second grasping wires intertwine in the second state to form at least one entanglement portion, ensuring that during retraction, the first and second grasping wires jointly pull on the electrode wire, achieving a secure grasp. Therefore, the retrieval device of this invention can efficiently and securely capture the electrode wire, significantly reducing surgical time and improving the success rate of the surgery. Attached Figure Description

[0036] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0037] Figure 1a This is a schematic diagram of the structure of a recycling device according to an embodiment of the present invention;

[0038] Figure 1b for Figure 1a A magnified view of part D in the middle;

[0039] Figures 2a to 2d This is a schematic diagram of the capture unit in the first state from different perspectives in an embodiment of the present invention;

[0040] Figures 3a to 3d This is a schematic diagram of the capture unit in a third state from different perspectives in one embodiment of the present invention;

[0041] Figures 4a to 4d This is a schematic diagram of the capture unit in the second state from different perspectives in one embodiment of the present invention;

[0042] Figures 5a to 5c This is a schematic diagram of the capture electrode wire of the capture unit in the first state, the third state and the second state in an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of the structure of a connecting portion according to one embodiment of the present invention;

[0044] Figure 7 A schematic diagram of the structure of the connecting portion according to another embodiment of the present invention;

[0045] Figures 8 to 10This is a schematic diagram of the structure of the capture unit in its first state from a different perspective in another embodiment of the present invention;

[0046] Figures 11a to 11c This is a schematic diagram of the structure of the capture unit in its first state from a different perspective in another embodiment of the first embodiment of the present invention;

[0047] Figure 12a This is a schematic diagram of the recycling device of the present invention in the third state;

[0048] Figure 12b This is a schematic diagram of the first and second capture wires of the recovery device of the present invention forming a locking space based on a third state;

[0049] Figure 13 This is a schematic diagram of the recycling device of the present invention;

[0050] Figure 14a This is a schematic diagram of the recycling device of the present invention from another perspective;

[0051] Figure 14b for Figure 14a A schematic diagram of the cross-sectional structure of section AA;

[0052] Figure 15a This is a schematic diagram of the recycling device of the present invention from another perspective;

[0053] Figure 15b for Figure 15a Schematic diagram of the cross-sectional structure of the middle BB section;

[0054] Figure 15c for Figure 15b A magnified view of part C in the middle;

[0055] Figure 15d This is a schematic diagram of the radial cross-section of the nested component, the first control wire, and the second control wire. Detailed Implementation

[0056] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0057] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0058] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0059] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure rotates, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0060] It should be noted that in the field of interventional medical devices, the end of a medical device implanted in the human or animal body that is closer to the operator is generally called the "proximal end," and the end that is farther from the operator is called the "distal end." Based on this principle, the "proximal end" and "distal end" of any component of a medical device are defined. "Axial direction" generally refers to the length direction of the medical device during delivery, and "radial direction" generally refers to the direction of the medical device perpendicular to its "axial direction." Based on this principle, the "axial direction" and "radial direction" of any component of a medical device are defined.

[0061] In this embodiment, combined with Figure 1a and Figure 1b As shown, according to an embodiment of the present invention, a retrieval device 100 is provided, which can be used to remove elongated target objects, such as wires or guide wires, from a living organism. For ease of understanding, this embodiment uses a wire from a cardiac implantable medical device as an example of the target object.

[0062] The recovery device 100 includes a capture unit 20, a control unit 30, and a conduit 10.

[0063] The catheter 10 includes a hollow tubular member having a proximal port, a distal port, and a first lumen 11 and a second lumen 12 connecting the proximal port and the distal port, the first lumen 11 and the second lumen 12 extending along the length of the catheter 10.

[0064] Please combine Figure 1a , Figure 1b and Figure 2d As shown, the control unit 30 includes a pusher 31, a first control wire 32, a second control wire 33, and a control assembly. The pusher 31 is a solid rod-shaped member or a hollow tubular member. The pusher 31 passes through the first inner cavity 11 of the conduit 10. The first control wire 32 and the second control wire 33 pass through the second inner cavity 12, and are respectively connected to the grasping part 20 to change the shape of the grasping part 20. The control assembly is connected to the pusher 31 and the control wires to change the relative positional relationship between the conduit 10, the pusher 31, the grasping part 20, and the first and second control wires 32 and 33.

[0065] In some embodiments, the catheter 10 may be omitted, the pusher 31 is a hollow tubular member, and the first control wire 32 and the second control wire 33 are inserted inside the pusher 31.

[0066] The capturing part 20 is used to capture target objects within a living organism. The capturing part 20 has radial expansion capability, allowing it to radially contract under external force, and to self-expand or mechanically expand back to its naturally unfolded shape (also known as a fully unfolded shape) and maintain this shape after the external force is removed. The retrieval device 100 may also include an outer sheath sleeved over the conduit 10. The capturing part 20, conduit 10, and control part 30 are all axially movable relative to the conduit 10. The capturing part 20 can be completely contained within the outer sheath, or it can be released from the outer sheath and unfolded.

[0067] Please refer to the following at the same time Figures 2a to 2dThe capturing unit 20 includes a first capturing wire 21 and a second capturing wire 22. The distal ends of the first capturing wire 21 and the second capturing wire 22 are both free ends, so the distal ends of the first capturing wire 21 and the distal ends of the second capturing wire 22 can move relative to each other.

[0068] The first capture wire 21 and the second capture wire 22 have a first state and a second state that can be switched between each other. Figures 2a to 2d The illustration shows the deployed state of the first and second capture wires 21 and 22 when they are released from the outer sheath (i.e., the first state of this embodiment). The first and second capture wires 21 and 22 each have at least one distal section, which is an axial region of the capture section 20 (e.g.,...). Figure 2a Region A in the diagram represents an axial region that is closer to the distal end of the grasping section 20 than the proximal ends of the first grasping wire 21 and the second grasping wire 22. In the first state, the distal sections of the first grasping wire 21 and the second grasping wire 22 are radially spaced apart and separated from each other. For example, the grasping section 20 has at least one axial plane (i.e., a plane parallel to the central axis; in this invention, the virtual central axis of the pusher 31 is used as the central axis of the grasping section 20), and within the distal section, the first grasping wire 21 and the second grasping wire 22 are located on radially opposite sides of this axial plane. (Refer to...) Figure 4d In the second state, the distal ends of the first capturing wire 21 and the second capturing wire 22 cross and intertwine to form at least one winding portion 201. Due to the presence of the winding portion 201, the distal ends of the first capturing wire 21 and the second capturing wire 22 mutually restrict each other in the radial and axial directions of the capturing section 20, thereby forming a stable net-like shape. In the second state of the capturing section 20, by forming at least one winding portion 201 between the first capturing wire 21 and the second capturing wire 22, it is possible to ensure that the first capturing wire 21 and the second capturing wire 22 jointly pull the electrode wire 200 during the retraction process. This not only achieves a firm capture, but also reduces the risk of capturing wire breakage during retrieval because the first capturing wire 21 and the second capturing wire 22 are simultaneously stressed during the pulling of the electrode wire 200.

[0069] Reference Figure 2d Both the first capture wire 21 and the second capture wire 22 are ring-shaped structures, with the first capture wire 21 and the second capture wire 22 being ring-shaped structures that are closed at the distal end and open at the proximal end. The first capture wire 21 includes a first fixed wire 211 and a first movable wire 212. The proximal end of the first fixed wire 211 is the first fixed end 2111, and the proximal end of the first movable wire 212 is the first movable end 2121. The first fixed wire 211 is located in the region along the radial direction from the central axis of the capture part 20 to the first side, and the first movable wire 212 is located in the region along the radial direction from the central axis of the capture part 20 to the second side. The distal end of the first fixed wire 211 is connected to the distal end of the first movable wire 212.

[0070] The second capture wire 22 includes a second fixed wire 221 and a second movable wire 222. The proximal end of the second fixed wire 221 is the second fixed end 2211, and the proximal end of the second movable wire 222 is the second movable end 2221. The distal ends of the second fixed wire 221 and the second movable wire 222 are connected. The first fixed end 2111 is connected to the pusher 31, the first movable end 2121 is connected to the first control wire 32, and the second fixed end 2211 is connected to the pusher 31. The second fixed wire 221 is located in the region from the central axis of the capture part 20 to the first side in the radial direction, and the second movable wire 222 is located in the region from the central axis of the capture part 20 to the second side in the radial direction. The second movable end 2221 is connected to the second control wire 33. The first control wire 32 and the second control wire 33 can move relative to the pusher 31 respectively, and at least one of the first control wire 32 and the second control wire 33 can rotate around a certain axis (e.g., a virtual line segment extending axially in the second inner cavity) to drive the first movable wire 212 and the second movable wire 222 connected thereto to intertwine with each other, thereby driving the first capture wire 21 and the second capture wire 22 to switch between the first state and the second state.

[0071] The first capturing wire 21 has an annular structure that forms a first through hole 2101, and the second capturing wire 22 has an annular structure that forms a second through hole 2201. (Refer to...) Figure 4d In the second state, the first movable wire 212 passes through the second through hole 2201 and the second movable wire 222 passes through the first through hole 2101. The distal ends of the first capture wire 21 and the second capture wire 22 cross each other, and the first movable wire 212 and the second movable wire 222 are wrapped around each other one or more times to form one or more winding parts 201.

[0072] It should be noted that the winding portion 201 can be located at the distal end of the first capturing wire 21 and the second capturing wire 22, or it can be located in the middle region of the first movable wire 212 and the second movable wire 222 from the proximal end to the distal end. The first movable wire 212 and the second movable wire 222 can be wound together once to form a winding portion 201, or they can be wound together twice or more to form two or more winding portions 201.

[0073] Please refer to this again. Figure 2aIn the first state, the first capturing wire 21 and / or the second capturing wire 22, viewed from the side, are both concave curved structures that extend away from the central axis of the capturing part 20 (in this invention, the virtual central axis of the pusher 31 is used as the central axis of the capturing part 20), i.e., concave curved structures extending outward. This arrangement allows the portions outside the outer sheath to more easily approach each other and form an intersecting shape when the first capturing wire 21 and the second capturing wire 22 are gradually compressed into the outer sheath from the proximal end to the distal end. Understandably, in other embodiments, one of the first capturing wire 21 and the second capturing wire 22 may be approximately located on the same plane (e.g., an axial plane). Approximately located on the same plane means that there exists a plane a, and the object's deviation from this plane a does not exceed 2 mm (e.g., 0.5 mm, 1 mm, 1.5 mm). This arrangement facilitates smoother intertwining of the first movable wire 212 and the second movable wire 222 to form the winding part 201.

[0074] Reference Figure 2d For example, from the proximal end to the distal end, the first fixed wire 211 and the first movable wire 212 extend in a direction away from each other and then bend and extend in a direction closer to each other, and converge and connect at the distal end to form a petal-shaped or teardrop-shaped ring structure. From the proximal end to the distal end, the second fixed wire 221 and the second movable wire 222 extend in a direction away from each other and then bend and extend in a direction closer to each other, and converge and connect at the distal end to form a petal-shaped or teardrop-shaped ring structure.

[0075] In other embodiments, the first fixed wire 211 and the first movable wire 212 can be formed into any other suitable shape such as an ellipse, circle, rhombus, or triangle. The second fixed wire 221 and the second movable wire 222 can also be formed into any other suitable shape such as an ellipse, circle, rhombus, or triangle. The first capturing wire 21 and the second capturing wire 22 are made of solid or hollow wire, which can be made of shape memory metal materials (such as nickel-titanium alloy, nickel-titanium-tantalum alloy, etc.) and / or shape memory polymer materials, or can be made of materials with developing function, such as platinum core nickel-titanium wire. The wire can be made of a single wire or multiple wires wound together. In other embodiments, the wire can be made of materials such as stainless steel or other elastic materials. The first capturing wire 21 and the second capturing wire are integrally formed. In other embodiments, the first fixed wire 211 and the first movable wire 212 can be made separately and then spliced ​​together, and the second fixed wire 221 and the second movable wire 222 can be made separately and then spliced ​​together.

[0076] The annular structures of the first capture wire 21 and the second capture wire 22 can be the same or different. For example, when in the first state, the distal end of the first capture wire 21 is arranged in an inverted V shape, and the distal end of the second capture wire 22 is arranged in an inverted U shape. This arrangement makes it easier for the distal end of the first capture wire 21 to be inserted into the second capture wire 22; or, the distal end of the first capture wire 21 is arranged in an inverted U shape, and the distal end of the second capture wire 22 is arranged in an inverted V shape; or, the distal ends of both the first capture wire 21 and the second capture wire 22 are arranged in an inverted V shape or an inverted U shape.

[0077] Further, please refer to Figures 3c to 3d The capturing part 20 may also have a third state. When the capturing part 20 is in the third state, the distal end of the first capturing wire 21 passes through the second through hole 2201, so that the distal ends of the first capturing wire 21 and the second capturing wire 22 intersect. It should be noted that in the first and third states, neither the first movable wire 212 nor the second movable wire 222 is wrapped. During the transition from the third state to the second state or from the first state to the second state, one of the first control wire 32 and the second control wire 33 rotates 360° or more around the other in a circumferential direction, causing the first control wire 32 and the second control wire 33 to respectively drive the first movable wire 212 and the second movable wire 222 to wrap around each other, thus transitioning to the second state; or, the first control wire 32 and the second control wire 33 have an axially extending axis between them (or, the second inner cavity has an axially extending axis), and the first control wire 32 and the second control wire 33 rotate together around this axis 360° or more, driving the first movable wire 212 and the second movable wire 222 to wrap around each other and transition to the second state, so that the first movable wire 212 and the second movable wire 222 wrap around each other and form a winding part 201 (please refer to...). Figure 4b and Figure 4d ).

[0078] Specifically, when the first control wire 32 and the second control wire 33 move relative to the pusher 31, the shape of the annular structure of the first grasping wire 21 can be changed. When the second control wire 33 moves relative to the pusher 31 along the axial direction, the shape of the annular structure of the second grasping wire 22 can be changed. This allows the annular structure of the first grasping wire 21 and the second grasping wire 22 to expand or contract in both the first and second states, and also changes the position of the distal ends of the first grasping wire 21 and the second grasping wire 22. This allows for precise control of the relative position of the distal ends of the first grasping wire 21 and the second grasping wire 22, enabling the grasping part 20 to transition from the first state to a third state in which the distal ends of the first grasping wire 21 and the second grasping wire 22 can cross and contact each other. It should be noted that the third state can also be formed by controlling the relative position of the grasping part 20 and the outer sheath. When the proximal portion of the grasping part 20 is compressed into the outer sheath, the third state can be achieved. In the third state, the target object can be confined within the capture space between the first capture wire 21 and the second capture wire 22. The size of this capture space is adjustable; by reducing its size, the first and second capture wires 21 and 22 can create a clamping force on the target object, thus firmly confining it between them and achieving secure capture. Furthermore, in the third state, by controlling the second capture wire 22 to shrink, the first and second capture wires 21 and 22 work together to lock the target object, preventing it from escaping. Therefore, the electrode wire can be captured efficiently and securely, significantly reducing surgical time and improving the success rate of the procedure.

[0079] In some embodiments, please refer to Figures 11a to 11c Along the radial direction, the capturing part 20 has a first side and a second side located on both sides of the central axis of the capturing part 20. The first capturing wire 21 and the second capturing wire 22 include a left-side section extending radially from the central axis of the capturing part 20 to the first side, and a right-side section extending radially from the central axis of the capturing part 20 to the second side. In the first state, the portion of the first capturing wire 21 on the first side is separated from the portion of the second capturing wire 22 on the first side, and the portion of the first capturing wire 21 on the second side is close to the portion of the second capturing wire 22 on the second side. In this arrangement of the capturing part 20, in the first state, a capturing space is formed between the first capturing wire 21 and the second capturing wire 22, and the distal end of the capturing part 20 and the area on the first side are opened to form a large flare, allowing the target object to more easily enter the capturing space between the first capturing wire 21 and the second capturing wire 22 through the flare, thereby improving capturing efficiency.

[0080] In another implementation, please refer to Figure 11bBoth the first capturing wire 21 and the second capturing wire 22 are annular structures with proximal openings and distal closings. The first capturing wire 21 includes a first movable wire 212 and a first fixed wire 211, with their proximal ends separated and their distal ends connected. The second capturing wire 22 includes a second movable wire 222 and a second fixed wire 221, with their proximal ends separated and their distal ends connected. Please refer to... Figure 11cAs shown, the first movable wire 212 forms a semi-circular structure in the left section of the first grasping wire 21, and the first fixed wire 211 forms a semi-circular structure in the right section of the first grasping wire 21. The first fixed wire 211 is bent radially outward relative to the first movable wire 212. The angle between the segment of the first fixed wire 211 near its distal end and the segment of the first movable wire 212 near its distal end is between 70° and 180°. For example, the angle between the segment of the first fixed wire 211 near its distal end and the segment of the first movable wire 212 near its distal end can be 80°, 90°, 95°, 100°, 110°, 120°, etc. The second grasping wire 22 includes a second movable wire 222 and a second fixed wire 221. The second movable wire 222 forms a semi-annular structure on the left side of the second grasping wire 22, and the second fixed wire 221 forms a semi-annular structure on the right side of the second grasping wire 22. The second fixed wire 221 is bent radially outward relative to the second movable wire 222. The angle between the distal segment of the second fixed wire 221 and the distal segment of the second movable wire 222 is between 70° and 180°. For example, the angle between the distal segment of the first fixed wire 211 and the distal segment of the first movable wire 212 can be 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, etc. Furthermore, the semi-annular structures formed by the first movable wire 212 and the second movable wire 222 are close to each other in the radial direction. This arrangement brings the first movable wire 212 and the second movable wire 222 closer together, facilitating easier approach and winding during the exchange process of the first capturing wire 21 and the second capturing wire 222 to form the winding section 201. It should also be noted that the first fixed wire 211 and the second fixed wire 221 are bent radially away from each other, opening the first side of the capturing section 20 to form a larger flare. This allows the target object to more easily enter the capturing space between the first capturing wire 21 and the second capturing wire 22 through the flare, improving capturing efficiency. In this embodiment, the first capturing wire 21 and the second capturing wire are located on opposite sides of the axis of the pusher 31. The direction of the first capturing wire 21 and the second capturing wire 22 towards the axis of the pusher 31 is defined as the radially inward direction, and the direction of the first capturing wire 21 and the second capturing wire 22 away from the axis of the pusher 31 is defined as the radially outward direction.

[0081] Furthermore, in some embodiments, when the grasping part 20 is in the first state, the maximum outward deviation of the first movable wire 212 is less than the maximum outward deviation of the first fixed wire 211, and / or, the maximum outward deviation of the second movable wire 222 is less than the maximum outward deviation of the second fixed wire 221. For example, the maximum outward deviation of the first movable wire 212 is less than the maximum outward deviation of the first fixed wire 211 and the second fixed wire 221, and the maximum outward deviation of the second movable wire 222 is less than the maximum outward deviation of the first fixed wire 211 and the second fixed wire 221. The maximum outward deviation of the component refers to the maximum distance between the projection of the component and the projection of the far end of the pusher 31 (or the central axis of the pusher 31) on the same radial plane (a plane perpendicular to the axial direction of the pusher 31). For example, when the capturing unit 20 is in the first state, the first capturing wire 21, the second capturing wire 22, and the distal end of the pusher 31 are projected onto the same radial plane. The radial distances from the points on the projections of the first movable wire 212 and the second movable wire 222 that are farthest from the distal end of the pusher 31 to the projections of the distal end of the pusher 31 are all smaller than the radial distances from the points on the projections of the first fixed wire 211 and the second fixed wire 221 that are farthest from the distal end of the pusher 31 to the projections of the distal end of the pusher 31. This configuration results in a smaller degree of outward bending, making it easier for the first movable wire 212 and the second movable wire 222 to form an entanglement point 201. On the other hand, the degree of outward bending of the first fixed wire 211 and the second fixed wire 221 is greater, giving the first capturing wire 21 and the second capturing wire 22 a larger inner space, thereby increasing the probability of capturing the target object. In other embodiments, the maximum outward deviation of the first movable wire 212 may be greater than or equal to the maximum outward deviation of the first fixed wire 211, and the maximum outward deviation of the second movable wire 222 may be greater than or equal to the maximum outward deviation of the second fixed wire 221.

[0082] Furthermore, in some embodiments, the segments of the first movable wire 212 near the distal end and the segments of the second movable wire 222 near the distal end may be parallel to each other or at an angle. For example, the segments of the first movable wire 212 near the distal end and the segments of the second movable wire 222 near the distal end are both bent toward the direction close to the central axis of the grasping part 20, and they are spatially intersected to form an angle, which may be less than or equal to 60°. In other embodiments, the angle may be greater than 60°. By intersecting the first movable wire 212 and the second movable wire 222 in the distal region, the first control wire 32 and the second control wire 33 only need to rotate a small angle relative to each other at the proximal end to make the first movable wire 212 and the second movable wire 222 intertwine to form an intertwining point 201, further improving the efficiency and success rate of the first movable wire 212 and the second movable wire 222 intertwining.

[0083] Please refer to Figures 8 to 10 As shown, in some embodiments, the first capturing wire 21 and the second capturing wire 22 can be roughly in the shape of a "P" or a "D". The first movable wire 212 is straighter than the first fixed wire 211, and the second movable wire 222 is straighter than the second fixed wire 221. With this configuration, the first state can be directly switched to the second state, omitting the third state. This allows the first movable wire 212 and the second movable wire 222 to be intertwined and exchanged to form an intertwined part 201, reducing the probability that the first movable wire 212 and the second movable wire 222 will interfere with or hinder their exchange due to bending.

[0084] In some embodiments, to distinguish the first movable wire 212, the first fixed wire 211, the second movable wire 222, and the second fixed wire 221, developing marks (e.g., developing dots made of developing materials such as gold, platinum, or tungsten) or twisted structures (e.g., V-shaped, M-shaped, or wavy twisted sections with recessed and / or raised structures on the first fixed wire 211 and / or the second fixed wire 221) can be provided, thus distinguishing the fixed wires and the movable wires. When capturing a target object, the captured target object is positioned as close as possible to the first fixed wire 211 and the second fixed wire 221, and away from the first movable wire 212 and the second movable wire 222, to avoid the first movable wire 212 and the second movable wire 222 from intertwining due to the target object being too close to them. In other embodiments, the developing marks and twisted structures may be omitted.

[0085] In this embodiment, the pusher 31 is a hollow tubular structure, and the material used can be one or more of metals and polymers. For example, materials such as nickel-titanium alloy, stainless steel, polyester, and silicone can be selected.

[0086] The first control wire 32 and the second control wire 33 are solid or hollow slender rods or filaments, and the materials used can be one or more of metals and polymers. For example, materials such as nickel-titanium alloy, stainless steel, polyester, and silicone can be selected. The sum of the radial dimensions (radial dimension refers to the width perpendicular to the length direction) of the first control wire 32 and the second control wire 33 is less than the radial dimension of the second inner cavity 12, so that the first control wire 32 and the second control wire 33 can easily move axially within the second inner cavity 12, and one of the first control wire 32 and the second control wire 33 can rotate about the other, or both can move circumferentially around a certain axis. However, the radial dimensions of the first control wire 32 and the second control wire 33 should not be too small. The radial dimensions of the first control wire 32 and the second control wire 33 can be set to be greater than or equal to the radial dimensions of the first capture wire 21 and the second capture wire 22, so that the first control wire 32 and the second control wire 33 can better transmit the pushing force and the force of mutual entanglement, and can reduce the radial movement space of the first control wire 32 and the second control wire 33 in the second inner cavity 12, so as to avoid the twisting and deformation of the first capture wire 21 and the second capture wire 22 due to excessive movement space.

[0087] Furthermore, the bending stiffness of the first control wire 32 and the second control wire 33 can be set to be greater than that of the first capture wire 21 and the second capture wire 22, so as to improve the pushing ability of the first control wire 32 and the second control wire 33, while making the first capture wire 21 and the second capture wire 22 easier to deform.

[0088] Reference Figure 1a and Figure 13 As shown, the control components include a handle 34 and a control component 35.

[0089] The distal end of the handle 34 is connected to the proximal end of the conduit 10 (e.g., by welding, bonding, heat fusion, or other fixed connection methods), and the proximal end of the handle 34 is movably connected to the distal end of the control component 35. The handle 34 is designed for easy gripping by the operator and for performing related control operations. The control component 35 is axially movable relative to the handle 34, and the control component 35 is also rotatable relative to the handle 34 in the circumferential direction of the pusher 31.

[0090] Please refer to Figure 14a and Figure 14bAs shown, the control assembly 35 includes a control member 351, a first pull rod 352, and a second pull rod 353. The control member 351 has a cylindrical structure and is rotatably disposed within a handle. It has a first axial channel 3511 and a second axial channel 3512 extending axially. The first axial channel 3511 and the second axial channel 3512 respectively penetrate both ends of the control member 351 along the axial direction. The distal end of the first pull rod 352 is slidably disposed within the first axial channel 3511, and the proximal end of the first pull rod 352... The proximal end of the first axial channel 3511 extends out of the first axial channel 3511, and the distal end of the second pull rod 353 is slidably disposed within the second axial channel 3512. The proximal end of the second pull rod 353 extends out of the second axial channel 3512. The proximal end of the first control wire 32 is disposed within the first axial channel 3511 and connected to the distal end of the first pull rod 352. The proximal end of the second control wire 33 is disposed within the second axial channel 3512 and connected to the distal end of the second pull rod 353.

[0091] Understandably, by pulling the first lever 352 to slide in the first axial channel 3511, the first control wire 32 is moved axially, thereby causing the annular structure of the first capture wire 21 to contract or expand; by pulling the second lever 353 to slide in the second axial channel 3512, the second control wire 33 is moved axially, thereby causing the annular structure of the second capture wire 22 to contract or expand. By driving the control member 351 to rotate relative to the handle in the circumferential direction, the proximal ends of the first control wire 32 and the second control wire 33 are driven to rotate around the axis of the control member 351, thereby causing the first movable wire 212 and the second movable wire 222 to intertwine, realizing that the first capture wire and the second capture wire intertwine and form at least one winding portion 201.

[0092] Furthermore, the control component 351 is also provided with a first fixing hole 3513 and a second fixing hole 3514. The first fixing hole 3513 extends radially and communicates with the first axial channel 3511, and the second fixing hole 3514 extends radially and communicates with the second axial channel 3512. The control component 35 also includes a first locking screw 354 and a second locking screw 355. The first fixing hole 3513 is provided with an internal thread that engages with the first locking screw 354, and the second fixing hole 3514 is provided with an internal thread that engages with the second locking screw 355. The first locking screw 354 and the second locking screw 355 are used to lock and fix the first pull rod 352 and the second pull rod 353 respectively.

[0093] Furthermore, please combine Figure 15a , Figure 15b and Figure 15cAs shown, the control unit 30 also includes a first reinforcing tube 36 and a second reinforcing tube (not shown in the figure). The first reinforcing tube 36 is disposed outside the first control wire 32, and the second reinforcing tube is sleeved outside the second control wire 33. The first reinforcing tube 36 and the second reinforcing tube are fixedly connected to the first control wire 32 and the second control wire 33 by methods including but not limited to welding, bonding, and heat fusion. The first control wire 32 passes through the first reinforcing tube 36, with its distal end extending out of the first reinforcing tube 36 and connected to the first movable wire 212. The proximal end of the first control wire 32 may extend out of the proximal end of the first reinforcing tube 36 or be flush with the proximal end of the first reinforcing tube 36. The second control wire 33 passes through the second reinforcing tube, with its distal end extending out of the first reinforcing tube 36 and connected to the second movable wire 222. The proximal end of the second control wire 33 may extend out of the proximal end of the second reinforcing tube or be flush with the proximal end of the second reinforcing tube. The first reinforcing tube 36 and the second reinforcing tube can be made of metallic materials such as stainless steel and nickel-titanium, or other non-metallic materials with a certain strength (e.g., elastic polymer materials) to allow them to pass through tortuous blood vessels more effectively. The first reinforcing tube 36 and the second reinforcing tube facilitate the transmission of the force from the control component 35 to the first movable wire 212 and the second movable wire 222 via the first reinforcing tube 36, the second reinforcing tube, the first control wire 32, and the second control wire 33. This increases the probability of successful entanglement of the first movable wire 212 and the second movable wire 222, enabling the first capturing wire 21 and the second capturing wire 22 to successfully switch from the first state to the second state.

[0094] In some embodiments, please combine Figure 15a , Figure 15b and Figure 15c As shown, the number of first reinforcing tubes 36 and second reinforcing tubes can also be set to multiple. Multiple first reinforcing tubes 36 are sequentially and spaced outside the first control wire 32, or multiple second reinforcing tubes are sequentially and spaced outside the second control wire 33. The first control wire 32 and the second control wire 33 take into account both flexibility and pushability, so that the first control wire 32 and the second control wire 33 can bend and deform in accordance with the tortuosity of the blood vessel, and better transmit the rotational driving force applied by the control member 351 to the proximal end of the first control wire 32 and the proximal end of the second control wire 33 to the distal end of the first control wire 32 and the distal end of the second control wire 33, thereby increasing the probability of successful winding of the first movable wire 212 and the second movable wire 222.

[0095] In other embodiments, the first reinforcing tube 36 and the second reinforcing tube may not be connected to the control assembly 35. The first reinforcing tube 36 is configured to slide axially relative to the first control wire 32, and the second reinforcing tube is configured to slide axially relative to the second control wire 33. When the first movable wire 212 and the second movable wire 222 are exchanged, the distal end of the first reinforcing tube 36 is pushed until the proximal portion of the first movable wire 212 enters the cavity of the first reinforcing tube 36. The wall of the first reinforcing tube 36 constrains the bending angle at the connection between the first movable wire 212 and the first control wire 32, as well as the bending angle of the first movable wire 212, so that the first movable wire 212... The moving wire 212 changes from a bent state to a relatively straight state, or by pushing the distal end of the second reinforcing tube until the proximal portion of the second movable wire 222 enters the lumen of the second reinforcing tube. The wall of the second reinforcing tube constrains the bending angle at the connection between the second movable wire 222 and the second control wire 33, as well as the bending angle of the second movable wire 222, causing it to change from a bent state to a relatively straight state. This facilitates the approach and position exchange between the first movable wire 212 and the second movable wire 222, thereby completing the winding and reducing the probability that the first movable wire 212 and the second movable wire 222 will interfere with or hinder their exchange due to bending. It is understood that one or more of the aforementioned first reinforcing tube 36 and second reinforcing tube may be omitted.

[0096] In some embodiments, please refer to Figure 15dAs shown, the control unit 30 may further include a nesting member 37, which has a receiving cavity. The nesting member 37 is fixedly connected to one of the first control wire 32 and the second control wire 33, while the other of the two is radially confined within the receiving cavity of the nesting member 37 and is movable relative to the nesting member 37 axially. For example, the nesting member 37 is fixedly connected to the first control wire 32, and the second control wire 33 is confined within the receiving cavity of the nesting member 37 and is movable relative to the nesting member 37 axially. The cross-section of the receiving cavity of the nesting member 37 may be a closed shape or a non-closed shape with side openings, as long as it can radially confine the control wire located therein. The fixed connection method between the nesting member 37 and the first control wire 32 or the second control wire 33 includes, but is not limited to, welding, bonding, and heat fusion. In some embodiments, the nesting member 37 may also be integrally formed with the first control wire 32 or the second control wire 33. The nesting member 37 can be located between the distal end of the control component 35 and the distal end of the catheter 10 (or the distal end of the pusher 31), for example, the nesting member 37 can be located in the second lumen 12. The nesting member 37 can be made of metallic materials such as stainless steel or nickel-titanium, or other non-metallic materials with a certain strength (e.g., elastic polymer materials) to allow it to pass through tortuous blood vessels more effectively. The nesting member 37 facilitates the transmission of force from the control component 35 to the first movable wire 212 and the second movable wire 222. Furthermore, the nesting member 37 can reduce the probability of the first control wire 32 or the second control wire 33 becoming entangled, preventing the transmission of rotational force to the first movable wire 212 and the second movable wire 222 from being blocked due to entanglement. Therefore, the nesting member 37 can increase the probability of successful entanglement of the first movable wire 212 and the second movable wire 222, enabling the first capturing wire 21 and the second capturing wire 22 to successfully switch from the first state to the second state.

[0097] In some embodiments, the number of nesting members 37 can also be set to multiple, with multiple nesting members 37 arranged sequentially at intervals along the axial direction. This arrangement can take into account flexibility, pushability, and mechanical transmission performance, so as to adapt to the tortuous deformation of blood vessels and better transmit the rotational driving force applied by the control member 351 to the proximal end of the first control wire 32 and the proximal end of the second control wire 33 to the distal end of the first control wire 32 and the distal end of the second control wire 33. It can also reduce the probability of the first control wire 32 and the second control wire 33 entangled with each other, thereby increasing the probability of successful entanglement of the first movable wire 212 and the second movable wire 222. Understandably, in some embodiments, the above-mentioned nesting member 37 can be used in conjunction with the first reinforcing tube 36 and the second reinforcing tube. For example, the nesting member 37 is fixedly connected to one of the first reinforcing tube 36 and the second reinforcing tube, while the other of the two is radially restricted in the receiving cavity of the nesting member 37 and can move relative to the nesting member 37 along the axial direction. In some embodiments, the nesting member 37 can replace the above-mentioned first reinforcing tube 36 and the second reinforcing tube. In some embodiments, the above-mentioned nesting member 37 can be omitted.

[0098] Furthermore, please combine Figure 3d and Figure 6 As shown, the recovery device 100 also includes a sleeve 40, which is sleeved around the pusher 31, the first fixed end 2111, and the second fixed end 2211, fixing the first fixed end 2111 and the second fixed end 2211 to the pusher 31. This improves the connection between the first fixed end 2111 and the second fixed end 2211 and the pusher 31, and reduces the probability that the first fixed end 2111 and the second fixed end 2211 will fall off the pusher 31 when subjected to retraction force. Furthermore, an axially extending through hole 41 is defined between the inner wall surface of the sleeve 40 and the outer peripheral surface of the pusher 31, and the first control wire 32 and the second control wire 33 are respectively movably inserted into the through hole 41. The through hole 41 is used to limit the movement space of the distal end of the first control wire 32, the distal end of the second control wire 33, and the proximal end of the first movable wire 212 and the proximal end of the second movable wire 222, so that the shape of the first capture wire 21 and the second capture wire 22 remains stable during the switching between the first state and the second state of the capture unit 20.

[0099] A wire-passing hole 42 extending axially is defined between the inner wall surface of the sleeve 40 and the outer peripheral surface of the pusher 31. The wire-passing hole 42 and the through hole 41 are located on both sides of the pusher 31 along its radial direction. The first fixing wire 211 and the second fixing wire 221 are passed through the wire-passing hole 42. The cross-sectional area of ​​the through hole 41 is larger than that of the wire-passing hole 42, so as to facilitate the wire-passing hole 42 to clamp and fix the first fixing wire 211 and the second fixing wire 221. The larger cross-sectional area of ​​the through hole 41 is conducive to increasing the range of motion of the first control wire 32 and the second control wire 33, so that the exchange of the first movable wire 212 and the second movable wire 222 is smoother.

[0100] Reference Figure 1a , Figure 5a , Figure 5b and Figure 5c The following describes in detail a method for recovering the electrode leads 200 of a cardiac implantable medical device using the recovery device 100 of this embodiment. The method includes:

[0101] Step 1: Put the recovery device 100 into the loading state. In the loading state, the control component 35 is in the initial position and the capture part 20 is in the outer sheath tube.

[0102] Step 2: The capture unit 20 is delivered to a position close to the electrode wire 200 through the outer sheath tube. The capture unit 20 is controlled by the push control component 35 to slide distally relative to the guide tube 10 and be released from the outer sheath tube until the first capture wire 21 and the second capture wire 22 of the capture unit 20 are in the first state.

[0103] Step 3: Continue to move the capture part 20 relative to the conduit 10 to the distal end so that the electrode wire 200 passes through the first through hole 2101 of the first capture wire 21 and the second through hole 2201 of the second capture wire 22.

[0104] Step 4: Keeping handle 34 stationary, pull the first lever 352 and the second lever 353 towards the proximal end. The first catching wire 21 deflects towards the side of the second catching wire 22, so that the first movable wire 212 of the first catching wire 21 passes through one side of the second through hole 2201 to the other side of the second through hole 2201, and the distal end of the first catching wire 21 intersects with the distal end of the second catching wire 22. At this time, the catching part 20 is in the third state. Alternatively, the catching part 20 can be partially retracted into the outer sheath by retracting handle 34 and control assembly 35, so that the first catching wire 21 and the second catching wire 22 approach each other radially to form a configuration with their distal ends intersecting. At this time, the catching part 20 is in the third state.

[0105] Step 5: The control component 35 rotates 360° or more relative to the handle 34. The first movable wire 212 passes through the second through hole 2201 and the second movable wire 222 passes through the first through hole 2101. The distal ends of the first capture wire 21 and the second capture wire 22 cross each other, and the first movable wire 212 and the second movable wire 222 are intertwined to form at least one winding part 201. At this time, the capture part 20 is in the second state.

[0106] Step 6: By retracting the hand control component 35 and the handle 34, the grasping part 20 moves towards the proximal end relative to the outer sheath until the grasping part 20 and the electrode wire 200 are fully loaded into the outer sheath. Then, the retrieval device 100 is withdrawn from the body to complete the retrieval of the electrode wire 200.

[0107] Understandably, the above recycling methods may vary depending on the structure of the recycling device 100. Those skilled in the art can select an appropriate recycling method based on the specific application scenario and the structure of the recycling device 100. For example, in some application scenarios, step four may be omitted.

[0108] In this embodiment, the recovery device 100 cannot perform the exchange when the electrode wire 200 crosses between the first capture wire 21 and the second capture wire 22. Please refer to... Figure 12a and Figure 12b As shown, when the electrode wire 200 spans between the first capture wire 21 and the second capture wire 22, it can drive the first capture wire 21 and the second capture wire 22 to directly form a third state, firmly restricting the target object between the first capture wire 21 and the second capture wire 22, and preventing the electrode wire 200 from coming off from the distal end of the capture part 20.

[0109] Release the locking of the first locking screw 354 and the first pull rod 352 in the control component, control the first pull rod 352 to drive the first control wire 32 to move towards the proximal end, thereby driving the distal end of the first capture wire 21 to move towards the direction close to the conduit 10, so that the first capture wire 21 and the second capture wire 22 cooperate to form a locking space, and the electrode wire 200 is surrounded in the locking space. After confirming that the electrode wire 200 is captured, relock the first locking screw 354 and the first pull rod 352.

[0110] By retracting the handle, the capture unit moves proximally relative to the conduit until the capture unit and electrode wire are fully loaded into the conduit. Then, the retrieval device is withdrawn from the body to complete the retrieval of the electrode wire 200.

[0111] Therefore, regardless of the engagement state between the electrode wire and the capture unit, for example, when the electrode wire 200 crosses between the first capture wire 21 and the second capture wire 22 (see reference...), Figure 12aAs shown), the electrode wires 200 are sequentially threaded through the annular structure of the first capture wire 21 and the second capture wire 22 (please refer to...). Figures 5a to 5c As shown, the recovery device 100 of the present invention can efficiently and firmly capture the electrode wire 200 through different operating methods, which greatly reduces the operation time and improves the success rate of the operation.

[0112] In some embodiments, such as Figure 6 As shown, the capturing part 20 also includes a connecting part 23. The outer peripheral surface of the pusher 31 is provided with a radially protruding support post 311. The connecting part 23 includes an arc-shaped wire segment 231 wound around the support post 311, a first connecting section 232 connected to one end of the arc-shaped wire segment 231 and the first fixed end 2111 respectively, and a second connecting section 233 connected to the other end of the arc-shaped wire segment 231 and the second fixed end 2211 respectively. The arc-shaped wire segment 231 is located on the proximal side of the sleeve 40. Since the arc-shaped wire segment 231 of the connecting part 23 is wound around the support post 311 in this embodiment, the connection firmness between the first capturing wire 21 and the second capturing wire 22 and the pusher 31 can be greatly improved. Therefore, it can reduce the risk of the first capturing wire 21 and the second capturing wire 22 slipping from the pusher 31 and the sleeve 40 (see reference) due to excessive pulling force during the retrieval process. Figure 6 The risk of escaping from the body.

[0113] In other embodiments, the connecting portion 23 is not necessarily filamentous; it can be sheet-like, mesh-like, or any other suitable shape.

[0114] In other embodiments, such as Figure 7As shown, the connecting part 23 includes an arc-shaped wire segment 231 that is circumferentially wrapped around the pusher 31, and a first connecting section 232 that is connected to one end of the arc-shaped wire segment 231 and the first fixed end 2111, and a second connecting section 233 that is connected to the other end of the arc-shaped wire segment 231 and the second fixed end 2211, respectively. In the radial direction, the grasping part 20 has a first side and a second side located on both sides of the central axis of the pusher 31, with the arc-shaped wire segment 231 located on the first side and the first fixed end 2111 and the second fixed end 2211 located on the second side. In this embodiment, since the first fixed end 2111 and the second fixed end 2211 are located on the same side, and the arc-shaped wire segment 231 is located on the other side and is wound around the pusher 31 circumferentially, the first connecting segment 232 and the second connecting segment 233 extend from the second side of the pusher 31 to the first side of the pusher 31 from the distal end to the proximal end. This causes a portion of the first connecting segment 232 and the second connecting segment 233 to overlap with the wall of the sleeve 40 axially. During retrieval, when the first grabbing wire 21 and the second grabbing wire 22 move relative to the sleeve 40 towards the distal end under the tension of the electrode wire 200, the first connecting segment 232 and the second connecting segment 233 can abut against the proximal end of the sleeve 40, thereby preventing the relative axial movement of the grabbing part 20 and the sleeve 40. Therefore, this reduces the risk of the first grabbing wire 21 and the second grabbing wire 22 falling from the pusher 31 and the sleeve 40 (see reference) due to excessive tension during retrieval. Figure 7 The risk of escaping from the body.

[0115] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A recovery device for capturing and recovering target objects within a living organism, characterized in that, include: The capturing unit includes a first capturing wire and a second capturing wire in a ring-shaped structure; When in the first state, at least a portion of the first capture wire and at least a portion of the second capture wire are separated radially, forming a capture space with an opening between them; when in the second state, the distal ends of the first capture wire and the second capture wire cross, and the first capture wire and the second capture wire are wrapped around each other once to form a wrapped portion, or wrapped around each other twice or more to form two or more wrapped portions. The control unit is connected to the capture unit and is used to control the first capture wire and the second capture wire to switch between the first state and the second state.

2. The recycling device according to claim 1, characterized in that, The capturing unit also has a third state. When the capturing unit is in the third state, at least a portion of the first capturing wire is inserted into the second capturing wire and the distal ends of the two cross each other. The control unit is also used to control the first capturing wire and the second capturing wire to switch between the first state, the second state and the third state.

3. The recycling device according to claim 2, characterized in that, The control unit includes a pusher connected to the capture unit and a first control wire and a second control wire; The first capture wire includes a first fixed end and a first movable end, the first fixed end being connected to the pusher, and the first movable end being connected to the first control wire; The second capture wire includes a second fixed end and a second movable end. The second fixed end is connected to the pusher, and the second movable end is connected to the second control wire. The first control wire and the second control wire can move relative to the pusher to switch between the first capture wire, the second capture wire and the third capture wire.

4. The recycling device according to claim 3, characterized in that, The control unit also includes: The handle is connected to the proximal end of the pusher; A control component is movably connected to the handle and to the proximal ends of the first control wire and the second control wire, respectively. The control component is used to drive the first movable end and the second movable end to move through the first control wire and the second control wire, respectively, so as to expand or contract the annular structure of the first capture wire and the second capture wire, or to make one of the first movable end and the second movable end rotate around the other, thereby causing the first capture wire and the second capture wire to intertwine with each other.

5. The recycling device according to claim 4, characterized in that, The control unit also includes: The first reinforcing tube is sleeved outside the first control wire; And / or, the second reinforcing tube is sleeved outside the second control wire.

6. The recycling device according to claim 5, characterized in that, The first reinforcing tube is axially movable relative to the first control wire, and the first reinforcing tube is axially movable between the proximal and distal ends of the grasping part, and accommodates a portion of the first movable end; and / or, the second reinforcing tube is axially movable relative to the second control wire, and the second reinforcing tube is axially movable between the proximal and distal ends of the grasping part, and accommodates a portion of the second movable end.

7. The recycling device according to claim 4, characterized in that, The control unit further includes a nested member located between the distal end of the control component and the distal end of the pusher, the nested member having a receiving cavity, the nested member being fixedly connected to one of the first control wire and the second control wire, the other of the first control wire and the second control wire being radially constrained in the receiving cavity of the nested member and movable axially relative to the nested member.

8. The recycling device according to claim 7, characterized in that, The control unit includes multiple nested components arranged at intervals along the axial direction.

9. The recycling apparatus according to any one of claims 1 to 8, characterized in that, Along the radial direction, the capturing part has a first side and a second side located on both sides of the central axis of the capturing part; In the first state, the portion of the first capture wire located on the first side is separated from the portion of the second capture wire located on the first side, and a flare is formed on the first side, while the portion of the first capture wire located on the second side is close to the portion of the second capture wire located on the second side; And / or, in the first state, the distal ends of the first and second capture wires are radially separated.

10. The recycling apparatus according to any one of claims 3 to 8, characterized in that, The first capture wire includes a first movable wire and a first fixed wire. The first movable wire is connected to the first control wire. The proximal ends of the first movable wire and the first fixed wire are separated and connected at their distal ends. The second capture wire includes a second movable wire and a second fixed wire. The second movable wire is connected to the second control wire. The proximal ends of the second movable wire and the second fixed wire are separated and connected at their distal ends. When the capture part is in the first state, the maximum outward deviation of the first movable wire is less than the maximum outward deviation of the first fixed wire, and / or, the maximum outward deviation of the second movable wire is less than the maximum outward deviation of the second fixed wire.

Images