Tissue excision clamping device
By designing a tissue resection and retrieval device that includes a cannula, a push rod, and a clamp, the integrated operation of resection and retrieval in percutaneous endoscopic lumbar discectomy (PELD) is realized. This solves the problems of long operation time and great patient pain caused by multiple instruments in the existing technology, and improves surgical efficiency and patient comfort.
Patent Information
- Application Number
- CN202520236773.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Current percutaneous endoscopic discectomy requires multiple instruments for tissue removal and clamping, resulting in a long operation time and significant patient discomfort.
Design a tissue resection and gripping device, including a cannula, a push rod, and grippers. The grippers can switch between retracted and extended states. Combining elastic and rigid structures, the design of the cannula and needle enables integrated resection and gripping operations.
It reduces surgical steps, shortens surgical time, reduces patient suffering, has a simple and compact structure, is easy to enter and exit the human body, and improves the reliability and stability of the device.
Smart Images
Figure CN223914175U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment technical field especially is involved in a kind of tissue resection clamping device. BACKGROUND
[0002] In most intervertebral foramen mirror surgery, doctors usually adopt minimally invasive method, coaxial cannula puncture needle is used to enter body from patient's body surface, then needle core is separated, a metal wire is stretched into needle tube, and then expansion sleeve is used to expand gradually, and after expansion to a certain extent, tool is used to remove protruding nucleus pulposus, nerve root, dural sac and hyperplastic bone tissue, and is taken out.In the existing operation, doctors use bone knife, breakthrough needle and other tools to remove, and then use tissue forceps to clamp and take out the removed tissue.The operation process needs to use multiple instruments, and the operation time is long, the operation time is long, and the patient's pain is more. UTILITARY MODEL CONTENT
[0003] Therefore, the utility model provides a tissue resection clamping device which saves operation steps, shortens operation time and reduces patient's pain.
[0004] To solve the above technical problems, the utility model provides a tissue resection clamping device, which comprises:
[0005] Cannula, the cannula has a first pipe orifice and a second pipe orifice in the length direction, the part of the cannula close to the second pipe orifice is a variable diameter pipe, and the inner diameter of the variable diameter pipe gradually increases along the direction close to the second pipe orifice;
[0006] Push rod, the push rod passes through the cannula coaxially, the push rod has a first rod end and a second rod end in the length direction, the first rod end is close to the first pipe orifice and the first rod end extends out of the first pipe orifice, and the second rod end is close to the second pipe orifice;
[0007] Clamping jaw, the clamping jaw is connected coaxially to the second rod end, the clamping jaw comprises a plurality of clamping jaw arms, the clamping jaw arm is provided with a cutting edge on the side away from the center line of the clamping jaw, the clamping jaw arm has a first arm end and a second arm end in the length direction, the first arm end is elastically connected to the second rod end so that the angle between the clamping jaw arm and the push rod is variable, the second arm end is located on the side away from the first rod end of the push rod, and the second arm end can be close to and away from the center line of the clamping jaw;
[0008] Wherein, the clamping jaw can be switched between the closed state and the open state;
[0009] When the jaw is in the closed state, the length of the part of the jaw arm retracted into the variable-diameter tube is L1, the elastic deformation of the jaw arm is E1, the angle between the jaw arm and the push rod is α1, and the distance between the second arm end and the center line of the jaw is D1.
[0010] When the jaw is in the open state, the length of the part of the jaw arm retracted into the variable-diameter tube is L2, the elastic deformation of the jaw arm is E2, the angle between the jaw arm and the push rod is α2, and the distance between the second arm end and the center line of the jaw is D2, L2 < L1, E2 < E1, α2 > α1, and D2 > D1.
[0011] Further, the part of the jaw arm close to the first arm end is an elastic structure, the part of the jaw arm close to the second arm end is a rigid structure, and the cutting edge is arranged on the rigid structure.
[0012] Further, a needle tube is coaxially arranged between the push rod and the sleeve, the needle tube has a third tube opening and a fourth tube opening in the length direction, the third tube opening is close to the first tube opening and flush with the first rod end, and the fourth tube opening is close to the second tube opening and clamps the first arm end on the second rod end.
[0013] Further, the second rod end is T-shaped, the elastic structure is L-shaped, and the second rod end and the elastic structure restrict each other from moving away from each other along the length direction of the push rod.
[0014] Further, the inner wall of the variable-diameter tube is provided with a first guide structure, and the jaw arm is provided with a second guide structure on the side away from the center line of the jaw, the first guide structure guides the second guide structure to move along the length direction of the jaw arm.
[0015] Further, the first guide structure is a sliding groove-shaped recess, and the second guide structure is a sliding block-shaped protrusion.
[0016] Further, the sliding groove-shaped recess and the sliding block-shaped protrusion each have a cross section perpendicular to the guide direction, and the cross section is dovetail-shaped.
[0017] Further, the angle between the direction of the cutting edge and the center line of the jaw is an acute angle.
[0018] Further, after the second arm ends of the plurality of jaw arms contact each other, the part of the jaw arm close to the second arm end encloses a needle head, and the second arm ends of the plurality of jaw arms are located at the tip of the needle head.
[0019] Further, the needle comprises a cylindrical body and at least three bevels arranged on the side of the cylindrical body and around the center line of the cylindrical body, and the intersection line of two adjacent bevels is the blade.
[0020] Compared with the prior art, the above technical scheme of the utility model has the following advantages:
[0021] 1) The tissue resection and clamping device allows doctors to complete resection and clamping work in one step during surgery, saves operation steps, reduces surgery time, and reduces patient pain.
[0022] 2) The tissue resection and clamping device sets the clamping jaw arm to include a resilient structure and a rigid structure, the resilient structure allows the connection angle of the clamping jaw arm and the push rod to be variable, and the rigid structure can complete cutting and clamping actions, the structure is simple and compact, and the size of the device is reduced.
[0023] 3) The tissue resection and clamping device sets the needle tube to realize the connection of the clamping jaw arm and the push rod, the structure is simple and compact, and it is convenient to enter and exit the human body and perform resection actions.
[0024] 4) The tissue resection and clamping device sets the second rod end and the resilient structure to be limited to each other, ensures that the clamping jaw arm and the push rod are not easily separated, and improves the reliability of the device.
[0025] 5) The tissue resection and clamping device sets the first guide structure and the second guide structure to improve the stability of the clamping jaw arm action and the stability of the device.
[0026] 6) The tissue resection and clamping device sets the first guide structure and the second guide structure to form a sliding groove and sliding block structure, the structure is simple and compact, and it is convenient to enter and exit the human body and perform resection actions.
[0027] 7) The tissue resection and clamping device sets the sliding groove and sliding block structure to be dovetail structures, which can prevent the clamping jaw arm and the sleeve from being separated from each other.
[0028] 8) The tissue resection and clamping device sets the angle between the direction of the blade and the center line of the clamping jaw to be an acute angle, which can ensure that any direction of tissue can be resected.
[0029] 9) The tissue resection and clamping device sets the clamping jaw arm to be needle-shaped, the clamping jaw is compact during the process of entering the human body, and it is convenient to enter and exit the human body and perform resection actions.
[0030] 10)The utility model discloses the tissue resection clamping device, and the clamping jaw is retracted to be provided with the cylindrical of bevel surface, is convenient for processing and manufacturing clamping jaw, and each direction of the side of the cylinder has the cutting edge, and it is convenient for cutting the tissue of each place. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed.
[0032] Figure 1 It is the schematic diagram of tissue resection clamping device in the utility model;
[0033] Figure 2 It is Figure 1 The partial close-up view of A in the utility model;
[0034] Figure 3 It is Figure 1 The partial close-up view of B in the utility model;
[0035] Figure 4 It is the connecting schematic diagram of needle pipe in the utility model;
[0036] Figure 5 It is the partial close-up view of C in the utility model; Figure 4
[0037] Figure 6 It is the connecting schematic diagram of push rod in the utility model;
[0038] Figure 7 It is the partial close-up view of D in the utility model; Figure 7 Figure 6
[0039] Figure 8 It is the schematic diagram of push rod in the utility model;
[0040] Figure 9 It is the partial close-up view of E in the utility model; Figure 8
[0041] Figure 10 It is the schematic diagram of clamping jaw in the utility model.
[0042] Description of the Drawings:1, sleeve;11, first pipe mouth;12, second pipe mouth;13, reducing pipe;14, first guide structure;2, push rod;21, first rod end;22, second rod end;3, clamping jaw;31, clamping jaw arm;32, cutting edge;33, elastic structure;34, rigid structure;35, second guide structure;36, cylindrical body;37, bevel surface;4, needle pipe;41, third pipe mouth;42, fourth pipe mouth. DETAILED DESCRIPTION
[0043] The utility model is further described below in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.
[0044] Referring to Figures 1 to 10 An embodiment of the tissue resection and clamping device is provided.
[0045] The tissue resection and clamping device comprises:
[0046] The sleeve 1 has a first pipe orifice 11 and a second pipe orifice 12 in the length direction, and the part of the sleeve 1 close to the second pipe orifice 12 is a variable-diameter pipe 13, and the inner diameter of the variable-diameter pipe 13 gradually increases in the direction close to the second pipe orifice 12.
[0047] The push rod 2 coaxially passes through the sleeve 1, and has a first rod end 21 and a second rod end 22 in the length direction, the first rod end 21 is close to the first pipe orifice 11 and extends out of the first pipe orifice 11, and the second rod end 22 is close to the second pipe orifice 12.
[0048] The clamping jaw 3 is coaxially connected to the second rod end 22, and comprises a plurality of clamping jaw arms 31, the clamping jaw arms 31 are provided with a cutting edge 32 on the side away from the center line of the clamping jaw, and have a first arm end (not shown in the figure) and a second arm end (not shown in the figure) in the length direction, the first arm end is elastically connected to the second rod end 22 to make the clamping jaw arms 31 and the push rod 2 angle variable, the second arm end is located on the side away from the first rod end 21 of the push rod 2, and the second arm end can be close to and away from the center line of the clamping jaw 3.
[0049] The clamping jaw 3 can be switched between the folded state and the unfolded state.
[0050] When the clamping jaw 3 is in the folded state, the length of the part of the clamping jaw arms 31 retracted into the variable-diameter pipe 13 is L1, the elastic deformation amount of the clamping jaw arms 31 is E1, the angle between the clamping jaw arms 31 and the push rod 2 is α1, and the distance between the second arm end and the center line of the clamping jaw 3 is D1.
[0051] When the clamping jaw 3 is in the unfolded state, the length of the part of the clamping jaw arms 31 retracted into the variable-diameter pipe 13 is L2, the elastic deformation amount of the clamping jaw arms 31 is E2, the angle between the clamping jaw arms 31 and the push rod 2 is α2, and the distance between the second arm end and the center line of the clamping jaw 3 is D2, L2 < L1, E2 < E1, α2 > α1, and D2 > D1.
[0052] In the above, the coaxial connection of the push rod 2 to the sleeve 1 means that the center line of the sleeve 1 and the center line of the push rod 2 are on the same straight line, the coaxial connection of the clamping jaw 3 to the push rod 2 means that the center line of the push rod 2 and the center line of the clamping jaw 3 are on the same straight line, the center line of the sleeve 1 means the line connecting the centers of the cross sections of the sleeve 1, the center line of the push rod 2 means the line connecting the centers of the cross sections of the push rod 2, and the center line of the clamping jaw 3 means the center of symmetry of the plurality of clamping jaw arms 31.
[0053] In the process of switching the clamping jaw 3 from the expanded state to the contracted state, the push rod 2 moves towards the first tube opening 11, the clamping jaw arms 31 are pressed by the inner wall of the variable-diameter tube 13, and the deformation amount becomes larger and larger, and the clamping jaw arms 31 are contracted towards the center line of the clamping jaw 3.
[0054] In the process of switching the clamping jaw 3 from the contracted state to the expanded state, the push rod 2 moves towards the second tube opening 12, the clamping jaw arms 31 extend out of the variable-diameter tube 13, and under the action of the elastic restoring force, the clamping jaw arms 31 expand outward, and the space between the plurality of clamping jaw arms 31 is the clamping space, and the clamping space is located on the side of the push rod 2 away from the first rod end 21.
[0055] The use method of the above tissue resection and clamping device will be introduced below.
[0056] 1. The doctor puts the expansion sleeve into the patient's body step by step.
[0057] 2. The doctor uses the tissue resection and clamping device to reach the patient's body through the expansion sleeve, and cuts off the protruding nucleus pulposus, nerve root, dural sac and hyperplastic bone tissue.
[0058] 3. The doctor pushes the push rod to expand the clamping jaw arms of the clamping jaw to form a clamping space, and extends to the object to be clamped, and then pulls the push rod to contract the clamping jaw arms of the clamping jaw to clamp the clamped object.
[0059] 4. The doctor takes out the tissue resection and clamping device from the expansion sleeve.
[0060] The above tissue resection and clamping device can enable the doctor to complete the resection and clamping work in one step during the operation, save the operation steps, reduce the operation time, and reduce the pain of the patient.
[0061] In the embodiment, the part of the clamping jaw arm 31 close to the first arm end is an elastic structure 33, the part of the clamping jaw arm 31 close to the second arm end is a rigid structure 34, and the cutting edge 32 is arranged on the rigid structure 34.
[0062] In the above, the elastic structure 33 refers to a material that can restore its original shape after the external force is removed, can deform under the restriction of the variable diameter tube 13, and can restore its shape after leaving the variable diameter tube 13. The rigid structure 34 refers to a structure that is hard and not easy to deform, and can cut and clamp tissue. The clamping jaw arm 31 is provided with the elastic structure 33 and the rigid structure 34, the elastic structure 33 allows the connection angle of the clamping jaw arm 31 and the push rod 2 to be variable, and the rigid structure 34 can complete the cutting and clamping action, and the structure is simple and compact, and easy to put into the human body.
[0063] In the embodiment, the needle tube 4 is coaxially arranged between the push rod 2 and the sleeve 1, the needle tube 4 has a third port 41 and a fourth port 42 in the length direction, the third port 41 is close to the first port 11, the third port 41 is flush with the first rod end 21, and the fourth port 42 is close to the second port 12, and the fourth port 42 clamps the first arm end on the second rod end 22.
[0064] In the above, the plurality of clamping jaw arms 31 of the clamping jaw 3 are arranged around the second rod end 22, and the clamping jaw arm 31 needs to be connected and fixed with the push rod. By arranging the needle tube 4, the connection between the clamping jaw arm 31 and the push rod 2 is realized, the structure is simple and compact, and it is easy to enter and exit the human body and perform the cutting action.
[0065] In the embodiment, the second rod end 22 is T-shaped, the elastic structure 33 is L-shaped, and the second rod end 22 and the elastic structure 33 are limited to each other and are separated from each other along the length direction of the push rod 2.
[0066] In the above, the second rod end 22 and the elastic structure 33 are hooked to each other, so that the second rod end 22 and the elastic structure 33 are not easy to slide relative to each other and are separated from each other, the second rod end 22 and the elastic structure are arranged to be limited to each other, the clamping jaw arm and the push rod are not easy to be separated, and the reliability of the device is improved.
[0067] In the embodiment, the inner wall of the variable diameter tube 13 is provided with a first guide structure 14, the clamping jaw arm 31 is provided with a second guide structure 35 on the side away from the clamping jaw center line, and the first guide structure 14 guides the second guide structure 35 to move along the length direction of the clamping jaw arm 31.
[0068] In the above, the push rod 2 drives the clamping jaw 3 to act, and the clamping jaw arm 31 of the clamping jaw 3 is preferably capable of moving along a precise trajectory, the first guide structure 14 and the second guide structure 35 are arranged to improve the stability of the action of the clamping jaw arm 31, and the stability of the device is improved.
[0069] In the embodiment, the first guide structure 14 is a sliding groove-shaped recess, and the second guide structure 35 is a sliding block-shaped protrusion.
[0070] In the above, the first guide structure 14 is a sliding groove, and the second guide structure 35 matches the sliding groove. The first guide structure 14 and the second guide structure 35 are embedded with each other, without occupying additional space. The sliding groove and the sliding block structure formed by the first guide structure 14 and the second guide structure 35 are simple and compact in structure, and are convenient for entering and exiting the human body and performing resection operations.
[0071] In the embodiment, the sliding groove-shaped recess and the sliding block-shaped protrusion both have a cross section perpendicular to the guide direction, and the cross section is dovetail-shaped.
[0072] In the above, the sliding groove-shaped recess is a dovetail groove, which is a groove with a specific angle and shape, and is usually used to connect two components to ensure that they are fixed and supported in multiple directions. In mechanical design, the dovetail groove can be used to connect two components to provide stable connection and support and prevent relative movement of the components during movement. The sliding groove and sliding block structure are both dovetail structures, which can prevent the jaws from being separated from the sleeve.
[0073] In the embodiment, the angle between the direction of the cutting edge 32 and the center line of the jaw 3 is an acute angle.
[0074] When the tissue resection and clamping device is in use, the push rod 2 cannot be adjusted at will, and there may be tissue that needs to be resected on the radial and axial outer sides of the jaw 3. Therefore, the direction of the cutting edge 32 is set to be non-parallel and non-perpendicular to the center line of the jaw 3. When the jaw 3 extends into the human body, the cutting edge 32 can resect the tissue on the radial and axial sides of the jaw 3.
[0075] In the embodiment, the second arm ends of the plurality of jaw arms 31 are in contact with each other, and the portions of the jaw arms 31 near the second arm ends enclose a needle head. The second arm ends of the plurality of jaw arms 31 are located at the tip of the needle head.
[0076] During the extension and retraction of the jaw into and out of the human body and the cutting process, the jaw 3 is in a closed state, which can improve the compactness of the device as much as possible, and is convenient for entering and exiting the human body and performing resection operations.
[0077] In the embodiment, the needle head includes a cylindrical body 36 and at least three bevel surfaces 37 arranged uniformly around the center line of the cylindrical body on the side surface of the cylindrical body 36. The intersection line of the two adjacent bevel surfaces 37 is the cutting edge 32.
[0078] The needle head can be manufactured according to the following steps:
[0079] First, prepare the cylindrical raw material;
[0080] Then, process the bevel surfaces 37 on the cylindrical body;
[0081] After the intersection of the cylindrical with the inclined surface 37 is divided into a plurality of jaw arms 31.
[0082] The jaw 3 is a cylindrical with an inclined surface after being folded, which is convenient for processing and manufacturing the jaw, and the side of the cylindrical has cutting edges in each direction, which is convenient for cutting the tissues in each place.
[0083] The tissue cutting and clamping device in the utility model is a stainless steel needle. The whole is designed in silver, which is beautiful and generous, has excellent corrosion resistance and durability, and can withstand long-term use and disinfection.
[0084] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A tissue resection clip taking device characterized by, The utility model relates to a kind of needle tube and needle tube, including: Casing, the casing has first nozzle and second nozzle in length direction, the part of the casing near the second nozzle is variable diameter pipe, the inner diameter of the variable diameter pipe gradually increases along the direction near the second nozzle; Push rod, the push rod is coaxial through the casing, the push rod has first rod end and second rod end in length direction, the first rod end is near the first nozzle and the first rod end extends out the first nozzle, the second rod end is near the second nozzle; Clamping jaw, the clamping jaw is coaxially connected to the second rod end, the clamping jaw includes multiple clamping jaw arms, the clamping jaw arm is provided with blade on the side away from the center line of the clamping jaw, the clamping jaw arm has first arm end and second arm end in length direction, the first arm end is elastically connected to the second rod end to make the clamping jaw arm and the push rod angle variable, the second arm end is on the side of the push rod away from the first rod end, and the second arm end can be close to and away from the center line of the clamping jaw; Wherein, the clamping jaw can be switched between retracted state and unfolded state; When the clamping jaw is in retracted state, the length of the part of the clamping jaw arm retracted into the variable diameter pipe is L1, the elastic deformation of the clamping jaw arm is E1, the angle of the clamping jaw arm and the push rod is alpha1, and the distance between the second arm end and the center line of the clamping jaw is D1; When the clamping jaw is in unfolded state, the length of the part of the clamping jaw arm retracted into the variable diameter pipe is L2, the elastic deformation of the clamping jaw arm is E2, the angle of the clamping jaw arm and the push rod is alpha2, and the distance between the second arm end and the center line of the clamping jaw is D2, L2 2. The tissue resection grasper of claim 1, wherein, The part of the clamping jaw arm near the first arm end is elastic structure, the part of the clamping jaw arm near the second arm end is rigid structure, and the blade is arranged on the rigid structure.
3. The tissue resection clip taking device according to claim 2, wherein, Also including needle tube, the needle tube is coaxially arranged between the push rod and the casing, the needle tube has third nozzle and fourth nozzle in length direction, the third nozzle is near the first nozzle, the third nozzle is flush with the first rod end, the fourth nozzle is near the second nozzle, and the fourth nozzle is tightly clamped on the second rod end.
4. The tissue resection clip taking device according to claim 3, wherein The second rod end is T-shaped, the elastic structure is L-shaped, and the second rod end and the elastic structure are limited to be separated from each other along the length direction of the push rod.
5. The tissue resection gripper device of claim 1, wherein, The inner wall of the variable diameter pipe is provided with first guide structure, the clamping jaw arm is provided with second guide structure on the side away from the center line of the clamping jaw, and the first guide structure guides the second guide structure to move along the length direction of the clamping jaw arm.
6. The tissue resection clip taking device according to claim 5, wherein, The first guide structure is groove-shaped recess, and the second guide structure is slider-shaped convex part.
7. The tissue resection clip taking device according to claim 6, wherein The first guide structure and the second guide structure all have cross section perpendicular to the guide direction, and the cross section is dovetail-shaped.
8. The tissue resection clip taking device according to claim 1, wherein, The angle between the direction of the blade and the center line of the clamping jaw is acute angle.
9. The tissue resection gripper device of claim 1, wherein, The second arm ends of the plurality of jaw arms are in contact with each other, and portions of the jaw arms proximate to the second arm ends enclose a needle, the second arm ends of the plurality of jaw arms being located at a tip of the needle.
10. The tissue resection clip taking device according to claim 9, wherein, The needle comprises a cylindrical body and at least three bevels arranged on a side of the cylindrical body and around a center line of the cylindrical body, and an intersection line of two adjacent bevels is the cutting edge.