Minimally invasive focus resection and capture device

Abstract

The invention relates to the technical field of medical instruments, in particular to a minimally invasive focus resection and capture device which comprises a main body structure, a grabbing assembly and a cutting assembly. The main body structure comprises framework rods and a shell assembly which are connected with each other. The grabbing assembly comprises an elastic clamping jaw and a rotating pipe fitting, the framework rod, the rotating pipe fitting and the shell assembly are sequentially and coaxially arranged from inside to outside, and a channel is formed between the framework rod and the shell assembly. The elastic clamping jaw is arranged at one end of the rotating pipe fitting and connected with the rotating pipe fitting, and the end, away from the elastic clamping jaw, of the rotating pipe fitting is matched with the shell assembly or the framework rod through a screw pair to move. The elastic clamping jaw comprises a plurality of clamping pieces arranged in the circumferential direction of the rotating pipe fitting. The problem that in the prior art, a scalpel structure is poor in cutting force can be solved, and the focus tissue taking-out efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a minimally invasive lesion removal and capture device. Background Art

[0002] Minimally invasive surgery has the characteristics of small incision, less pain for patients, safe and convenient operation, fast recovery and good treatment effect. At present, the most commonly used end tools in minimally invasive surgery are general-purpose equipment such as clamps. During the resection process, the doctor needs at least one set of surgical forceps and surgical scissors to cooperate with the operation. This operation is very challenging for the doctor's skills in a limited space, and the larger the volume of the lesion tissue, the more difficult it is to operate within the limited wound area.

[0003] In the related art, a Chinese patent with publication number CN 113598891 A discloses a dual-drive minimally invasive scalpel structure, which includes a main structure, a grasping assembly and a cutting assembly. The main structure includes a fixed tube and a first position-limiting tube, the fixed tube and the first position-limiting tube are coaxially arranged, the fixed tube is located in the first position-limiting tube, and there is a channel between the fixed tube and the first position-limiting tube. The grasping assembly is connected to the cutting assembly, and the grasping assembly and the cutting assembly are suitable for extending or retracting the main structure along the channel. The cutting assembly is used for the removal of the lesion, and the cutting assembly is also used for the contraction or relaxation of the end of the grasping assembly. The dual-drive minimally invasive scalpel can achieve complete cutting and envelope grasping of the lesion through the coordinated cooperation of the grasping assembly and the cutting assembly.

[0004] In the above-mentioned related technologies, the cutting component drives the end of the grasping component to gradually close while cutting the lesion tissue. Since the grasping action is mainly achieved by the force generated by the radio frequency heating wire on the grasping component in the opposite direction of its movement, the grasping component is bent and deformed, so the envelope formed is elliptical. However, this way of opening the grasping component will increase the movement resistance of the elastic clamp as the opening angle increases, and constrain the increase in the rigidity of the elastic clamp, which will lead to the elastic mechanism being unable to provide a sufficiently large cutting force to the radio frequency heating wire, affecting the cutting effect. Summary of the invention

[0005] In order to improve the problem of poor cutting force in the scalpel structure of the prior art and further improve the efficiency of removing lesion tissue, the present invention provides a minimally invasive lesion removal and capture device, and adopts the following technical solutions:

[0006] A minimally invasive lesion removal and capture device, comprising a main structure, a grasping assembly and a cutting assembly, wherein the main structure comprises a skeleton rod and a shell assembly connected to each other, the grasping assembly comprises an elastic clamp and a rotating pipe, the skeleton rod, the rotating pipe and the shell assembly are coaxially sleeved in sequence from inside to outside, and a channel is formed between the skeleton rod and the shell assembly;

[0007] The elastic clamp is disposed at one end of the rotating tube, and the elastic clamp includes a plurality of clips arranged along the circumference of the rotating tube, one end of each clip is connected to the rotating tube, and each clip is configured to be spirally wound around the outer circumference of the rotating tube to be received in the channel, and when extended out of the channel, the plurality of clips are unfolded into an umbrella shape;

[0008] The cutting assembly includes a wire locking structure and a cutting wire; the wire locking structure is movably arranged on the rotating pipe, the cutting wire is connected to the wire locking structure and the other end of the clip respectively, and the wire locking structure is used to adjust the extension length of the cutting wire to drive the other ends of the plurality of clips to gather or spread out, so that the plurality of clips can switch between a gathered shape and an umbrella shape;

[0009] One end of the rotating tube away from the elastic clamp moves in cooperation with the shell component or the skeleton rod through a spiral pair; the rotating tube is used to drive the elastic clamp and the cutting component to be stored in the channel, or to drive the elastic clamp and the cutting component to extend out of the channel.

[0010] Optionally, the grabbing assembly further comprises a support member, the support member is sleeved on the skeleton rod, and the support member and the skeleton rod are relatively fixed along the axial direction;

[0011] The rotating pipe comprises a driving screw and an inner rotating tube, one end of the driving screw is threadedly connected to the outer shell, and the other end is connected to the inner rotating tube;

[0012] One end of the inner rotating tube away from the driving screw rod has an embedding portion, the embedding portion and the support member are slidably embedded with each other along the axial direction of the inner rotating tube, and the embedding portion is fixedly connected to the clip.

[0013] The cutting assembly includes cutting wires matching the number of the clips, and the cutting wires correspond to the clips one by one;

[0014] The wire locking structure is sleeved on the rotating pipe, and each cutting wire extends along the corresponding clip, with one end connected to the wire locking structure and the other end passing through the end of the corresponding clip and connected to the end of the adjacent clip.

[0015] Optionally, one end of the shell component is provided with an oblique groove matching the number of the clips, and one end of each clip away from the rotating pipe extends out of the channel through the oblique groove.

[0016] Optionally, each of the clips includes a fixed portion and a protruding portion, and a plurality of the fixed portions are spirally fixedly arranged on the outer circumference of the rotating tube, one end of the protruding portion is connected to the end of the fixed portion, and the other end protrudes out of the channel through the inclined groove.

[0017] Optionally, the wire locking structure comprises a wire slider, a conductive slip ring and a bearing group, wherein the conductive slip ring is arranged in the wire slider, and the bearing group is arranged between the conductive slip ring and the wire slider;

[0018] The conductive slip ring is relatively fixed to the rotating pipe along the circumferential direction and connected in an axial sliding manner, the wire slider is relatively fixed to the housing along the circumferential direction and connected in an axial sliding manner, and one end of the cutting wire away from the clip is connected to the conductive slip ring.

[0019] Optionally, a first side slot is formed on the rotating tube along the axial direction, and the conductive slip ring is slidably connected to the first side slot;

[0020] The shell is provided with a second side slot along the axial direction, and the wire slider is slidably connected to the second side slot.

[0021] Optionally, the wire locking structure further includes a locking ring, which is arranged between the conductive slip ring and the bearing group, and is used to press and fix the end of the cutting wire on the conductive slip ring.

[0022] Optionally, the conductive slip ring is provided with wire passing holes matching the number of the cutting wires, and the cutting wires are passed through the wire passing holes.

[0023] Optionally, a wire guide tube is provided on each of the clips, and the cutting wire is passed through the wire guide tube.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The minimally invasive lesion removal and capture device of the present invention, when not in use, the cutting assembly and the grasping assembly are both stored in the channel between the skeleton rod and the shell assembly. When one end of the main structure is about to reach the lesion tissue, by rotating the rotating pipe, the rotating pipe moves and rotates along the axial direction of the skeleton rod, driving the elastic clamp and the cutting assembly at its end to rotate and extend out from the channel. In this process, the cutting wire releases a corresponding length under the regulation of the locking wire structure, so that the clip gradually unfolds into an umbrella shape under the action of its own elasticity to envelop the lesion tissue, and then the lesion tissue is removed by the cutting wire. After the lesion tissue is removed, the cutting wire is tightened under the regulation of the locking wire structure, so that the ends of the clip are gathered together to achieve the capture of the lesion tissue.

[0026] In this process, since the clip is configured to be spirally coiled around the outer periphery of the rotating tube to be accommodated in the channel, when the elastic clamp extends out of the channel driven by the rotating tube, each clip is tilted and unfolded into an umbrella shape in the same direction. Then the cutting wire is tightened by the locking wire structure, and the cutting wire generates a force opposite to its movement direction on the clip, and a tendency of contraction occurs between the ends of the clip. At the same time, under the combined action of the torque force of the rotating tube and the tensioning force of the cutting wire, each clip is deformed to form a spiral envelope. Compared with the elliptical envelope formed by the bending of the clip, each clip in the present invention has a higher degree of deformation, and the shape of the lesion is closer to the gathered shape of the clip, so that less healthy tissue can be removed while the lesion is completely removed. In addition, the deformation resistance encountered when the elastic clamp is pushed out by screwing in is smaller, which means that the rigidity of the clip can be greater, which can provide a greater cutting force for the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 2 is a schematic diagram of the overall structure of a minimally invasive lesion removal and capture device according to an embodiment of the present invention;

[0028] Figure 2 2 is a schematic diagram of the main structure of a minimally invasive lesion removal and capture device according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of a grabbing component in an embodiment of the present invention;

[0030] Figure 4 yes Figure 1 A magnified schematic diagram of the middle A area;

[0031] Figure 5 is a schematic diagram of the structure of the elastic clamping claw when it is unfolded in an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the elastic clamping claws when they are folded in an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of the connection between the support member and the engaging portion in an embodiment of the present invention;

[0034] Figure 8 is a partial structural schematic diagram of a grabbing component in an embodiment of the present invention;

[0035] Fig. 9 is a structural schematic diagram of a wire locking structure in an embodiment of the present invention;

[0036] Fig.10 It is a side sectional view of the wire locking structure in an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Main structure; 11. Skeleton rod; 12. Shell assembly; 121. First shell tube; 1211. Oblique groove; 122. Second shell tube; 1221. Second side slot; 13. Cutting head; 14. Cutting blade; 15. Channel; 2. Grasping assembly; 21. Elastic clamp; 211. Clip; 2111. Fixed part; 2112. Extending part; 2113. Active perforation; 2114. Groove; 22. Rotating pipe fitting; 221. Drive screw; 222. Inner rotating tube; 2221. First side slot; 23. Support member; 24. Fitting portion; 3. Cutting assembly; 31. Wire locking structure; 311. Wire slider; 3111. Protrusion; 312. Conductive slip ring; 3121. Wire hole; 313. Bearing assembly; 3131. Upper bearing; 3132. Lower bearing; 314. Positioning pin; 315. Locking ring; 32. Cutting wire; 33. Wire guide tube. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific implementation methods and are not intended to limit this application;

[0041] The term "including" and its variations used in this article are open inclusions, that is, "including but not limited to"; the term "based on" is "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first" and "second" mentioned in the present invention are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "multiple" is two or more.

[0042] In order to improve the problems existing in the related art, the present invention provides a minimally invasive lesion removal and capture device. Figure 1-Figure 4 As shown, the device includes a main structure 1, a grabbing assembly 2 and a cutting assembly 3. The main structure 1 includes a skeleton rod 11, a cutter head 13 and a shell assembly 12 connected to each other. The grabbing assembly 2 includes an elastic clamp 21 and a rotating tube 22. The skeleton rod 11, the rotating tube 22 and the shell assembly 12 are coaxially sleeved from the inside to the outside, and a channel 15 is formed between the skeleton rod 11 and the shell assembly 12. The elastic clamp 21 is arranged at one end of the rotating tube 22. The elastic clamp 21 includes a plurality of clips 211 arranged along the circumference of the rotating tube 22. One end of each clip is connected to the rotating tube 22. Each clip 211 is configured to be spirally coiled around the outer periphery of the rotating tube 22 to be received in the channel 15. When extended out of the channel 15, the plurality of clips 211 are unfolded into an umbrella shape. The cutting assembly 3 includes a locking wire structure 31 and a cutting wire 32. The locking wire structure 31 is movably arranged on the rotating pipe 22. The cutting wire 32 is respectively connected to the locking wire structure 31 and the other end of the clip 211. The locking wire structure 31 is used to adjust the extension length of the cutting wire 32 to drive the other ends of the multiple clips 211 to gather or spread out, so that the multiple clips 211 switch between an envelope shape and an umbrella shape. The end of the rotating pipe 22 away from the elastic clamp 21 cooperates with the housing assembly 12 or the skeleton rod 11 through a spiral pair. The rotating pipe 22 is used to drive the elastic clamp 21 and the cutting assembly 3 to be stored in the channel 15, or drive the elastic clamp 21 and the cutting assembly 3 to extend out of the channel 15.

[0043] The minimally invasive lesion removal and capture device of the present invention, when not in use, the grasping component 2 can be stored in the channel 15 between the skeleton rod 11 and the shell component 12. At this time, the multiple clips 211 in the elastic clamp 21 are in an elastic deformation state and are spirally coiled around the outer periphery of the rotating tube 22. When one end of the main structure 1 approaches the lesion tissue, by rotating the rotating tube 22, the rotating tube 22 moves and rotates along the axial direction of the skeleton rod 11, driving the elastic clamp 21 at its end to rotate and extend out of the channel 15. In this process, the cutting wire 32 is released to a corresponding length under the adjustment of the wire locking structure 31, so that the multiple clips 211 of the elastic clamp 21 gradually expand into an umbrella shape under the action of its own elasticity, such as Figure 5 As shown, the multiple clips 211 scattered in an umbrella shape can cover the lesion tissue, and then the lesion tissue can be removed by the cutting assembly 3 (which can be a cutting wire 32) at the end of the multiple clips 211. After the lesion tissue is removed, the cutting wire 32 is tightened under the regulation of the locking wire structure 31, so that the ends of the multiple clips 211 are gathered together, so that the lesion tissue can be wrapped by the multiple clips 211, that is, the lesion tissue can be grasped.

[0044] In this process, refer to Figure 5-Figure 6As shown, since the clips 211 are configured to be spirally wound around the outer periphery of the rotating tube 22 to be received in the channel 15, when the elastic clamps 21 are driven by the rotating tube 22 to extend out of the channel 15, each clip 211 is tilted and expanded in the same direction as shown in FIG. Figure 5 Then, the cutting wire 32 is tightened by the wire locking structure 31, and the cutting wire 32 drives the ends of the plurality of clips 211 to approach each other, and the ends of the clips 211 tend to be gathered together. At the same time, under the combined action of the torque force of the rotating pipe 22 and the tightening force of the cutting wire 32, each clip 211 is deformed to form an umbrella shape as shown. Figure 6 The spiral envelope formed by multiple spiral clips 211 is shown. Compared with the elliptical envelope formed by bending multiple clips 211 extending in the same direction, each clip 211 in the present invention is spirally bent and has a higher degree of deformation. The envelope formed by multiple clips 211 is closer to a circle, and the shape of the lesion tissue is closer to that of each clip 211. Therefore, the elastic clamp 21 can remove less healthy tissue on the premise of completely removing the lesion. In addition, the deformation resistance encountered when the elastic clamp 21 is pushed out by screwing in is smaller, which means that the rigidity of the clip 211 can be greater, which can provide a greater cutting force for the cutting wire 32.

[0045] If the target object needs to be modified or expanded during the operation, at any time of the movement, the extension and retraction of the elastic clamp 21 can be controlled by adjusting the extension amount of the rotating tube 22 and the extension length of the cutting wire 32, so that the scalpel has the ability to cut repeatedly in a single operation, which can greatly increase the fault tolerance of the operation and enable the operator to have greater correction ability during the cutting process. The skeleton rod 11 and the shell assembly 12 can guide the grasping assembly 2 and the cutting assembly 3 when they are extended and retracted, so that the grasping assembly 2 and the cutting assembly 3 can only move along the direction of the channel 15, ensuring the stability of the grasping assembly 2 and the cutting assembly 3 running along the channel 15. The present invention can reduce the cross-sectional area of ​​the wound by housing the grasping component 2 and the cutting component 3 in the main structure 1. After reaching the lesion, the grasping component 2 and the cutting component 3 are extended and opened along the axial direction of the skeleton rod 11 to cut and grasp the lesion tissue slightly larger than the cross-sectional area of ​​the wound, thereby minimizing the surgical trauma to the patient. At the same time, through the coordinated cooperation of the grasping component 2 and the cutting component 3, the enveloping, cutting and grasping process of the lesion can be realized, ensuring the integrity and relative position certainty of the lesion when it is removed.

[0046] In an alternative embodiment, referring to Figure 2-Figure 6As shown, the main structure 1 also includes a cutter head 13, and the cutter head 13 has a cutting blade 14, and the cutting blade 14 is used to cut the epidermal tissue of the human body, and the wound after the incision is used for the surgical knife to enter to achieve the grasping and removal of the lesion. The cutter head 13 is arranged at the end of the skeleton rod 11 and is threadedly connected to the skeleton rod 11. The cutter head 13 is welded or bonded to the shell component 12.

[0047] In an alternative embodiment, referring to Figure 1 and Figure 2 As shown, the housing assembly 12 further includes a first housing tube 121 close to the cutter head 13 and a second housing tube 122 away from the cutter head 13. The first housing tube 121 and the second housing tube 122 can be fixedly connected by pins, bonding or welding. Specifically, the inner diameter of the first housing tube 121 is smaller than the inner diameter of the second housing tube 122. The first housing tube 121 is used to constrain the deformation of the elastic clamp 21. The first housing tube 121 is made of stainless steel and has high strength. The second housing tube 122 constrains the freedom of movement of the rotating pipe 22 and the locking wire structure 31, and is made of materials such as polyurethane. Of course, in other embodiments, the first housing tube 121 and the second housing tube 122 can also be integrally formed.

[0048] In an alternative embodiment, referring to Figure 4-Figure 6 As shown, one end of the first shell tube 121 away from the second shell tube 122 is provided with inclined grooves 1211 matching the number of the clips 211. Figure 7 As shown, each clip 211 includes a fixed portion 2111 and an extended portion 2112. The multiple fixed portions 2111 are spirally fixedly arranged on the outer periphery of the rotating tube 22. One end of the extended portion 2112 is fixedly connected to the fixed portion 2111, and the other end extends out of the channel 15 through the inclined groove 1211 and can spread outward.

[0049] In the embodiment of the present invention, the spirally arranged fixing portion 2111 can guide the extension process of the extension portion 2112, so that the extension portion 2112 can extend to the outside of the channel 15 along the direction intersecting the axis of the rotating tube 22. The inclined groove 1211 at the end of the first shell tube 121 further guides the extension process of the clip 211, so that the clip 211 can stably extend along the inclined groove 1211. At the same time, when the elastic clamp 21 and the cutting assembly 3 are stored in the channel 15, the end of the extension portion 2112 is stored in the space of the inclined groove 1211. The inclined groove 1211 serves as a transition space between the inside and the outside of the channel 15, which is conducive to the stability of the extension and storage process of the clip 211.

[0050] In an alternative embodiment, referring to Figure 7-Figure 9As shown, the rotating tube 22 includes a driving screw 221 and an inner rotating tube 222. One end of the driving screw 221 cooperates with the second outer shell tube 122 or the skeleton rod 11 through a spiral pair, and the other end is connected to the inner rotating tube 222. The grabbing assembly 2 also includes a support member 23. The support member 23 is sleeved on the skeleton rod 11. The support member 23 can rotate relative to the skeleton rod 11, and the support member 23 and the skeleton rod 11 are relatively fixed in the axial direction. Specifically, one end of the support member 23 abuts against the cutter head 13, and the other end abuts against the shoulder of the skeleton rod 11, so that the support member 23 is fixed in the axial direction relative to the skeleton rod 11. Further, referring to Fig. 9 As shown, an end of the inner rotating tube 222 away from the driving screw 221 is provided with an engaging portion 24, and the engaging portion 24 and the support member 23 are slidably engaged with each other along the axial direction of the inner rotating tube 222. In the embodiment of the present invention, a plurality of clips 211 are spirally wound around the outer side of the support member 23 in the same direction, and the fixing portion 2111 of each clip 211 is fixedly connected to the engaging portion 24.

[0051] It should be noted that the drive screw 221 can be threadedly connected to the internal thread of the second shell tube 122, or can be threadedly connected to the external thread of the skeleton rod 11, so as to drive the internal rotating tube 222 to rotate axially relative to the main structure 1. Preferably, in this embodiment, a spiral pair is formed between the drive screw 221 and the second shell tube 122.

[0052] Optionally, the support member 23 and the engaging portion 24 may be splines that engage with each other. Since the support member 23 and the engaging portion 24 engage with each other, and the support member 23 is axially fixed relative to the skeleton rod 11, the driving screw 221 drives the inner rotating tube 222 to rotate axially, and the engaging portion 24 drives the support member 23 to rotate. At the same time, the key teeth of the engaging portion 24 can move along the length direction of the keyway of the support member 23, so that the support clip 211 is controlled to rotate and extend along the channel 15.

[0053] Of course, in other embodiments, the support member 23 may be replaced by an ordinary sleeve, a guide groove is provided axially on the sleeve, the engaging portion 24 is replaced by a rotating shaft, a limit strip is provided on the outer wall of the rotating shaft, the limit strip is clamped in the guide groove and can move along the direction of the guide groove, and can also drive the clip 211 to rotate and extend.

[0054] In an optional embodiment, the number of cutting wires 32 matches the number of clips 211, and the cutting wires 32 correspond to the clips 211 one by one. The locking wire structure 31 is sleeved on the rotating pipe 22, and each cutting wire 32 extends along the corresponding clip 211, and one end is connected to the locking wire structure 31, and the other end passes through the end of the corresponding clip 211 and is connected to the end of the adjacent clip 211. For details, refer to Figure 5 and Figure 8As shown, the end of each clip 211 away from the rotating pipe 22 is provided with an active through hole 2113, and one end of each cutting wire 32 away from the wire locking structure 31 passes through the active through hole 2113 on the corresponding clip 211, and is fixedly connected with the end of the adjacent clip 211, and each cutting wire 32 is connected in series in the same direction. When the cutting wire 32 is tightened by the wire locking structure 31, each cutting wire 32 can generate a gathering force on the adjacent clips 211. When multiple cutting wires 32 are tightened at the same time, each clip 211 generates the same deformation in the same direction, thereby forming a final spiral envelope.

[0055] In the embodiment of the present invention, when the elastic jaws 21 need to be extended, the cutting wire 32 is released by the wire locking structure 31 to adapt to the expansion of the elastic jaws 21. When the grasping action needs to be achieved, the cutting wire 32 is tightened by the wire locking structure 31, so that the elastic jaws 21 tend to be retracted. The cutting wire 32 in the embodiment of the present invention can be a radio frequency heating wire, which removes the lesion tissue through the electric cutting effect.

[0056] In an alternative embodiment, referring to Fig. 9 and Fig.10 As shown, the wire locking structure 31 includes a wire slider 311, a conductive slip ring 312 and a bearing group 313, and the bearing group 313 is arranged between the conductive slip ring 312 and the wire slider 311. The conductive slip ring 312 is relatively fixed to the rotating pipe 22 in the circumferential direction and is slidably connected in the axial direction, the wire slider 311 is relatively fixed to the second housing tube 122 in the circumferential direction and is slidably connected in the axial direction, and the end of the cutting wire 32 away from the clip 211 is connected to the conductive slip ring 312.

[0057] Reference Fig.10 As shown, the bearing group 313 in the embodiment of the present invention may specifically include an upper bearing 3131 and a lower bearing 3132 to realize the relative rotation of the conductive slip ring 312 and the wire slider 311. In the embodiment of the present invention, the pulse signal on the high-frequency generator is transmitted to the cutting wire 32 through the conductive slip ring 312, and the conductive slip ring 312 and the rotating pipe 22 do not rotate relative to each other, and the wire slider 311 and the second housing tube 122 do not rotate relative to each other. Therefore, when the rotating pipe 22 advances in the axial spiral, the conductive slip ring 312 rotates and advances along with the rotating pipe 22 to release the cutting wire 32, and when the rotating pipe 22 drives the elastic clamp 21 to rotate and retract into the channel 15, the conductive slip ring 312 rotates along with the rotating pipe 22 to drive the cutting wire 32 to be wound around the outside of the rotating pipe 22. When the grabbing action needs to be realized, by applying axial pulling force to the wire slider 311, the conductive slip ring 312 is driven to move axially along the rotating pipe 22, so that the cutting wire 32 can be tightened to close the elastic clamp 21.

[0058] Specifically, refer to Fig.10As shown, the inner rotating tube 222 is provided with a first side slot 2221 in the axial direction, and the conductive slip ring 312 is slidably connected with the first side slot 2221, specifically, the positioning pin 314 is embedded in the first side slot 2221 of the inner rotating tube 222 to achieve rotational constraint. The second outer shell tube 122 is provided with a second side slot 1221 in the axial direction, and the wire slider 311 is slidably connected with the second side slot 1221, specifically, the protrusion 3111 on the side of the wire slider 311 is embedded in the second side slot 1221 to achieve rotational constraint. When grabbing the lesion tissue, the protrusion 3111 on the wire slider 311 is slid upward along the length direction of the second side slot 1221, so as to drive the conductive slip ring 312 to move axially together, thereby tightening the cutting wire 32 to close the elastic clamp 21.

[0059] Further, see Fig.10 As shown, in an optional embodiment, the wire locking structure 31 also includes a locking ring 315, which is disposed between the conductive slip ring 312 and the bearing group 313, and can be specifically an upper bearing 3131 or a lower bearing 3132. The locking ring 315 is used to press and fix the end of the cutting wire 32 on the conductive slip ring 312. In addition, the conductive slip ring 312 is also provided with wire holes 3121 matching the number of cutting wires 32, and the cutting wires 32 are passed through the wire holes 3121, which can be specifically provided on the inner wall of the conductive slip ring 312. Specifically, the routing process of the cutting wire 32 refers to Fig.10 As shown: For easy distinction, the cutting wire 32 in the figure is thickened, and the end of the cutting wire 32 passes through the wire hole 3121 in the conductive slip ring 312, reaches the lower end of the conductive slip ring 312, and then bends from the lower end, along the through hole between the conductive slip ring 312 and the lower bearing 3132, and passes through the locking ring 315 and the shoulder of the conductive slip ring 312, and the locking ring 315 is pressed by the lower bearing 3132, so that the cutting wire 32 is firmly positioned on the conductive slip ring 312.

[0060] Of course, in other embodiments, the wire locking structure 31 can also be locked in the following manner: for example, a ball joint can be melted at the end of the cutting wire 32, the conductive slip ring 312 can be prepared by an injection molding process, and the ball joint and a portion of the cutting wire 32 can be injection molded into the conductive slip ring 312; or, the conductive slip ring 312 can adopt a structure in which two sleeves are sleeved on each other, and the cutting wire 32 is inserted into the gap between the two sleeves and the two sleeves are tightened, thereby achieving the effect of clamping the cutting wire 32.

[0061] In an alternative embodiment, referring to Figure 6Each clip 211 is provided with a groove 2114 along the length direction, each groove 2114 is embedded with a wire guide tube 33, and the cutting wire 32 is passed through the wire guide tube 33. The wire guide tube 33 is conducive to protecting the cutting wire 32 and guiding the extension direction of the cutting wire 32 to avoid interference between adjacent cutting wires 32.

[0062] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A minimally invasive lesion removal and capture device, characterized in that: It comprises a main structure (1), a grabbing component (2) and a cutting component (3); The main structure (1) comprises a skeleton rod (11) and a shell component (12) connected to each other, the grab component (2) comprises an elastic clamp (21) and a rotating pipe (22), the skeleton rod (11), the rotating pipe (22) and the shell component (12) are coaxially sleeved in sequence from the inside to the outside, and a channel (15) is formed between the skeleton rod (11) and the shell component (12); The elastic clamp (21) is arranged at one end of the rotating tube (22), and the elastic clamp (21) comprises a plurality of clamping pieces (211) arranged along the circumference of the rotating tube (22), one end of each of the clamping pieces (211) is connected to the rotating tube (22), and each of the clamping pieces (211) is configured to be spirally wound around the outer circumference of the rotating tube (22) to be received in the channel (15), and when extended out of the channel (15), the plurality of clamping pieces (211) are unfolded into an umbrella shape; The cutting assembly (3) comprises a locking wire structure (31) and a cutting wire (32); the locking wire structure (31) is movably arranged on the rotating pipe (22); the cutting wire (32) is respectively connected to the locking wire structure (31) and the other end of the clip (211); the locking wire structure (31) is used to adjust the extension length of the cutting wire (32) so as to drive the other ends of the plurality of clips (211) to gather or spread out, so that the plurality of clips (211) can switch between a gathered shape and an umbrella shape; One end of the rotating tube (22) away from the elastic clamp (21) cooperates with the housing component (12) or the skeleton rod (11) through a spiral pair, and the rotating tube (22) is used to drive the elastic clamp (21) and the cutting component (3) to be stored in the channel (15), or to drive the elastic clamp (21) and the cutting component (3) to extend out of the channel (15).

2. The minimally invasive lesion removal and capture device according to claim 1, characterized in that: The grabbing assembly (2) further comprises a support member (23), wherein the support member (23) is sleeved on the skeleton rod (11), and the support member (23) and the skeleton rod (11) are relatively fixed in the axial direction; The rotating pipe (22) comprises a driving screw (221) and an inner rotating tube (222), one end of the driving screw (221) is threadedly connected to the outer shell, and the other end is connected to the inner rotating tube (222); The inner rotating tube (222) has an engaging portion (24) at one end away from the driving screw (221), and the engaging portion (24) and the supporting member (23) are slidably engaged with each other along the axial direction of the inner rotating tube (222), and the engaging portion (24) is fixedly connected to the clip (211).

3. The minimally invasive lesion removal and capture device according to claim 1, characterized in that: The cutting assembly (3) comprises cutting wires (32) whose number matches the number of the clips (211), and the cutting wires (32) correspond one to one to the clips (211); The wire locking structure (31) is sleeved on the rotating pipe (22), and each cutting wire (32) extends along the corresponding clip (211), with one end connected to the wire locking structure (31) and the other end passing through the end of the corresponding clip (211) and connected to the end of an adjacent clip (211).

4. The minimally invasive lesion removal and capture device according to claim 1, characterized in that: One end of the housing component (12) is provided with an inclined groove (121) whose number matches the number of the clips (211), and one end of each clip (211) away from the rotating pipe (22) extends out of the channel (15) through the inclined groove (121).

5. The minimally invasive lesion removal and capture device according to claim 4, characterized in that: Each of the clips (211) comprises a fixed portion (2111) and a protruding portion (2112); a plurality of the fixed portions (2111) are fixedly arranged on the outer circumference of the rotating tube (22) in a spiral shape; one end of the protruding portion (2112) is connected to the end of the fixed portion (2111), and the other end protrudes out of the channel (15) through the inclined groove (121).

6. The minimally invasive lesion removal and capture device according to claim 1, characterized in that: The wire locking structure (31) comprises a wire slider (311), a conductive slip ring (312) and a bearing group (313), wherein the bearing group (313) is arranged between the conductive slip ring (312) and the wire slider (311); The conductive slip ring (312) and the rotating tube (22) are relatively fixed in the circumferential direction and are slidably connected in the axial direction, the wire slider (311) and the housing are relatively fixed in the circumferential direction and are slidably connected in the axial direction, and one end of the cutting wire (32) away from the clip (211) is connected to the conductive slip ring (312).

7. The minimally invasive lesion removal and capture device according to claim 6, characterized in that: The rotating tube (22) is provided with a first side slot (2221) along the axial direction, and the conductive slip ring (312) is slidably connected to the first side slot (2221); A second side slot (122) is provided on the shell along the axial direction, and the wire slider (311) is slidably connected to the second side slot (122).

8. The minimally invasive lesion removal and capture device according to claim 6, characterized in that: The wire locking structure (31) further comprises a locking ring (315), wherein the locking ring (315) is arranged between the conductive slip ring (312) and the bearing group (313), and the locking ring (315) is used to press and fix the end of the cutting wire (32) onto the conductive slip ring (312).

9. The minimally invasive lesion removal and capture device according to claim 6, characterized in that: The conductive slip ring (312) is provided with wire passing holes (3121) whose number matches the number of the cutting wires (32), and the cutting wires (32) are passed through the wire passing holes (3121).

10. The minimally invasive lesion removal and capture device according to claim 1, characterized in that: A wire guide tube (33) is provided on each of the clips (211), and the cutting wire (32) passes through the wire guide tube (33).

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