Far-end actuator of endoscope anastomat
By adopting a wave-like structure and grasping structure in the distal effector of the laminoscopic stapler, the problems of tissue slip and poor nailing are solved, and stable tissue assembly and high-quality incision formation are achieved.
Patent Information
- Application Number
- CN202420318402.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-21
AI Technical Summary
Existing laminoscopic staplers can easily lead to tissue slippage and poor nailing during tissue anastomosis, affecting the incision flatness and the healing effect of the anastomosis.
A distal effector of a laminoscope stapler is designed, which adopts a combination of a nail holder and a nail cartridge assembly. The nail cartridge assembly is equipped with a cutter groove along the axial direction, and the two sides are wavy structures, and the convex parts are arranged between the convex parts and the concave parts. The transition section forms a "several" shape structure, and a gripping structure and guide portion are provided on the nail hole and the nail groove to enhance the gripping force of the tissue.
Effectively prevent tissue slippage, ensure the flatness of the incision and the molding quality of the anastomosis, and reduce the difficulty of surgery and the risk of bleeding.
Smart Images
Figure CN222323594U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical instruments, in particular to a distal end actuator of a laparoscope stapler. Background Art
[0002] Medical staplers are clinically used devices that replace manual suturing. Their main working principle is to use staples to staple tissues (such as the gastrointestinal tract and blood vessels) and then cut and separate them, which is clinically called anastomosis. Its working principle is similar to that of a "stapler". The staples are embedded in the stapler bin before firing, and the staples are U-shaped. Firing means that the staples are pushed out of the stapler bin by the staple pusher (or staple anvil) below, pass through the human tissue, and are squeezed by the staple anvil to become a "B" shape, completing the stapling of the two layers of tissue.
[0003] The working height and number of staplers are pre-set, and the height of the stapler is greater than the thickness of the clamped tissue. After the stapler end actuator is clamped, excess tissue will be squeezed out of the working area. At the same time, slippage of the clamped tissue will inevitably occur during the clamping process, which will cause the stapler to slide along the jaws due to the squeezing force during the cutting and stapling process, thereby affecting the flatness of the incision. The staplers may also tilt when they are ejected, resulting in poor staple formation, and in severe cases, the tissue cannot be effectively sutured. Therefore, in order to prevent this from happening, doctors often increase the clamping force, but at the same time this will cause excessive squeezing of the tissue, affecting the blood supply to the postoperative tissue, and finally making it difficult for the anastomosis to heal. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a laparoscope stapler which can effectively prevent the clamped tissue from moving horizontally or vertically during the stapling process.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a distal actuator of a laparoscopic stapler, including a nail anvil and a nail magazine assembly arranged corresponding to the nail anvil, the nail magazine assembly is axially provided with a knife groove, and a group of nail magazines are respectively provided on both sides of the knife groove, and the contour of the outer wall of the nail anvil includes an arc segment at the distal end and two side edges respectively connected to the two ends of the arc segment, at least one of the side edges is a wavy structure formed by convex parts and concave parts arranged at intervals, and the convex parts and the concave parts are connected by a transition section to form a "J"-shaped structure between adjacent convex parts.
[0006] Furthermore, the convex portion and the concave portion are connected by an "S"-shaped arc transition section.
[0007] Furthermore, the sum of the axial lengths of an adjacent convex portion and a concave portion is 3 to 10 mm, the radial height H1 of the convex portion is 1 to 5 mm, and the radial depth H2 of the concave portion is 1 to 5 mm; and 6 convex portions and 7 concave portions are arranged on each of the side edges.
[0008] Furthermore, each group of the nail magazines has at least two rows of nail groove groups, each row of the nail groove groups is provided with a plurality of nail grooves, the inner surface of the nail support is provided with two groups of nail hole groups corresponding to the two groups of nail magazines respectively, each group of the nail hole group is provided with a plurality of nail holes, and the plurality of nail holes are arranged in a one-to-one correspondence with the plurality of nail grooves.
[0009] Furthermore, each group of the nail hole groups includes a first nail hole row, a second nail hole row and a third nail hole row which are arranged radially outward in sequence, the nail holes on the second nail hole row are axially offset by half a nail hole relative to the nail holes on the first nail hole row, and the nail holes on the third nail hole row are arranged the same in the axial direction as the nail holes on the first nail hole row.
[0010] Furthermore, the inner surface of the anvil of the nail support is provided with a plurality of gripping structures, and the plurality of gripping structures are distributed on both sides of the nail holes of the first nail hole row and / or the third nail hole row.
[0011] Furthermore, the gripping structure is in the form of a triangular pyramid or a columnar structure, and the gripping structure is 0.5 to 2 mm higher than the surface of the anvil.
[0012] Furthermore, the inner surface of the nail support is provided with multiple pairs of guide parts, and the guide parts are arranged in pairs at both ends of the nail nest.
[0013] Furthermore, the guide portion is an arc block structure, each pair of the guide portions includes two arc block structures arranged opposite to each other, and the guide portion is higher than the inner surface of the dowel seat by 0.5 to 2 mm.
[0014] Furthermore, the nail nest is an "8"-shaped structure with large ends and a small middle, and the depth at the two ends is greater than the depth in the middle.
[0015] The beneficial effects of the utility model are:
[0016] After the distal end actuator of the laparoscopic stapler of the utility model clamps the tissue, the side edges of the wavy structures on both sides of the stapler seat are embedded in the tissue, and the convex part and the concave part are connected by a transition section, which can further squeeze the tissue into the formed "J"-shaped structure, thereby preventing the clamped tissue from slipping;
[0017] Furthermore, gripping structures are provided on both sides of the nail nest on the nail support or guide parts are provided at both ends of the nail nest to prevent the tissue from sliding along the jaws due to the extrusion force during the process of cutting and suturing the tissue. On the one hand, the flatness of the tissue incision is ensured, the difficulty of the surgical operation is reduced, and the labor intensity of the surgeon is reduced; on the other hand, it is ensured that the anastomotic staples do not deviate during the process of entering the tissue, thereby ensuring the molding quality of the anastomotic opening and reducing the risk of bleeding. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.
[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.
[0020] Figure 2 It is a structural schematic diagram of the nail support in the first embodiment of the utility model.
[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of the middle part of the structure.
[0022] Figure 4 It is a partial structural enlarged schematic diagram of the second embodiment of the utility model.
[0023] Figure 5 It is a partial structural enlarged schematic diagram of the third embodiment of the utility model.
[0024] In the figure: 1. nail magazine assembly, 11. knife groove, 12. nail groove, 2. nail support, 21. nail nest, 22. convex part, 23. concave part, 24. transition section, 25. gripping structure, 25′. guiding part. DETAILED DESCRIPTION
[0025] The utility model is now further described in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model. The term "proximal end" herein refers to the end close to the operator, and the term "distal end" refers to the end away from the operator; the term "axial" refers to the length direction from the proximal end to the distal end of the laparoscopic stapler; the term "radial" refers to the direction perpendicular to the axial direction of the laparoscopic stapler.
[0026] Embodiment 1
[0027] like Figure 1As shown, a distal actuator of a laparoscopic stapler includes a stapler seat 2 and a staple magazine assembly 1 arranged corresponding to the stapler seat 2. The stapler seat 2 can pivot relative to the staple magazine assembly 1, thereby realizing the opening and clamping of the distal actuator. A knife groove 11 is provided in the middle of the stapler magazine assembly 1 along the axial direction (the length direction), and a group of staple magazines are provided on both sides of the knife groove 11. Each group of staple magazines has three rows of nail groove groups, and each row of nail groove groups is provided with a plurality of nail grooves 12, and the staples are arranged in the nail grooves 12. A staple nest 21 arranged opposite to the nail groove 12 is provided on the stapler seat 2. After clamping, the operator fires the laparoscopic stapler at the proximal handle, and the staples are ejected from the staple magazine assembly 1, pass through the human tissue, and reach the staple nest of the stapler seat 2. After being squeezed, the staples become "B" shaped, completing the stapling of the two layers of tissue.
[0028] The profile of the outer wall of the anvil 2 includes an arc segment at the distal end and two side edges respectively connected to the two ends of the arc segment, at least one of the side edges is a wavy structure formed by the convex portion 22 and the concave portion 23 being arranged at intervals, and the convex portion 22 and the concave portion 23 are connected by a transition segment 24, so that a "J"-shaped structure is formed between adjacent concave portions. In one embodiment, the shapes of the convex portion 22 and the concave portion 23 are, for example, arc-shaped, rectangular, and sawtooth-shaped. The transition segment 24 is an "S"-shaped arc transition segment, a straight line or an irregular line segment, preferably an "S"-shaped arc transition segment. In this embodiment, the geometric center lines of several convex portions 22 are radially parallel and easy to process. In another embodiment, the geometric center lines of the convex portions are radially non-parallel, for example, the center lines of adjacent convex portions are at a certain inclination angle, which is more conducive to preventing human tissue from slipping along the axial direction of the laparoscopic stapler during cutting and suturing.
[0029] The sum of the axial lengths of an adjacent convex portion 22 and a concave portion 23 is 3 to 10 mm, the radial height H1 of the convex portion 22 is 1 to 5 mm, and the radial depth H2 of the concave portion 23 is 1 to 5 mm. In order to ensure that the length of the side of the wavy structure is within the effective suture distance range, preferably, 6 convex portions 22 are provided and 7 concave portions 23 are provided. Figure 1 and Figure 2 As an illustration, no preferred number is shown, but according to the actual needs of the stapler, the number of the protrusions 22 and the recesses 23 is not limited to the above number. Here, the radial height and the radial depth refer to the dimensions in the direction perpendicular to the axial direction of the laparoscopic stapler and parallel to the plane where the surface of the staple cartridge assembly is located.
[0030] When the anvil 2 and the nail magazine assembly 1 are clamped together, the protrusions 22 on both sides of the anvil 1 are embedded in the tissue, and part of the tissue is squeezed into the recess 23, thereby preventing the clamped tissue from slipping.
[0031] Embodiment 2
[0032] The anvil 2 is provided with two groups of nail nests, each group of nail nests includes a first nail nest row, a second nail nest row and a third nail nest row arranged in sequence from the inside to the outside, the nail nests on the second nail nest row are staggered by half a nail nest 21 relative to the nail nests on the first nail nest row, and the nail nests on the third nail nest row are arranged in the same manner as the nail nests 21 on the first nail nest row. The surface of each nail nest 21 presents an "8"-shaped structure with large ends and small middle, and the maximum depth at both ends is greater than the depth in the middle. The "8"-shaped structure makes it easier for the two nail legs of the suture nail to enter the nail nest. When the two nail legs enter from the two ends of the nail nest respectively and reach the maximum depth and are pressed to the middle of the nail nest, the suture nail finally forms a "B" shape. The inner surface of the anvil 2 is provided with a gripping structure 25, such as a convex tip. Specifically, the gripping structure 25 is provided on both sides of the middle section of the nail nest 21 on the first nail nest row and / or the third nail nest row. The gripping structure 25 is in the form of a triangular pyramid or a columnar structure, and the gripping structure 25 is 0.5 to 2 mm higher than the inner surface of the anvil 2 .
[0033] Embodiment 3
[0034] The inner surface of the anvil 2 is provided with a guide portion 25', which surrounds the two ends of the nail nest 21. The guide portion 25' is a circular arc block structure, and the guide portion 25' is 0.5 to 2 mm higher than the inner surface of the anvil 2. When the suture nail is ejected from the nail magazine assembly 1, it passes through the human tissue and reaches the nail nest of the nail seat 2. The raised guide portion 25' guides the suture nail to be formed in the nail nest 21, thereby improving the nail formation rate.
[0035] The gripping structure 25 in the second embodiment and the guiding portion 25 ′ in the third embodiment enhance the gripping force on the tissue and prevent the tissue from slipping after the anvil 2 and the staple cartridge assembly 1 are clamped together.
[0036] The above-mentioned implementation mode is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A distal end actuator of a laparoscopic stapler, comprising a nail support (2) and a nail magazine assembly (1) arranged corresponding to the nail support (2), characterized in that: The nail magazine assembly (1) is provided with a knife groove (11) along the axial direction, and a group of nail magazines are provided on both sides of the knife groove (11). The profile of the outer wall of the nail support (2) includes an arc segment at the far end and two side edges respectively connected to the two ends of the arc segment, at least one of the side edges is a wave-like structure formed by convex parts (22) and concave parts (23) arranged at intervals, and the convex parts (22) and the concave parts (23) are connected by a transition section (24) so that a "J"-shaped structure is formed between adjacent convex parts (22).
2. The distal end actuator of the laparoscopic stapler according to claim 1, characterized in that: The convex portion (22) and the concave portion (23) are connected via an "S"-shaped arc transition section (24).
3. The distal end actuator of the laparoscopic stapler according to claim 1 or 2, characterized in that: The sum of the axial lengths of an adjacent convex portion (22) and a concave portion (23) is 3 to 10 mm, the radial height H1 of the convex portion (22) is 1 to 5 mm, and the radial depth H2 of the concave portion (23) is 1 to 5 mm; and six convex portions (22) and seven concave portions (23) are arranged on each side edge.
4. The distal end actuator of the laparoscopic stapler according to claim 1, characterized in that: Each group of the nail magazines has at least two rows of nail groove groups, each row of the nail groove groups is provided with a plurality of nail grooves (12), the inner surface of the nail support (2) is provided with two groups of nail nest groups corresponding to the two groups of the nail magazines respectively, each group of the nail nest group is provided with a plurality of nail nests (21), and the plurality of nail nests (21) are arranged in a one-to-one correspondence with the plurality of nail grooves (12).
5. The distal end actuator of the laparoscopic stapler according to claim 4, characterized in that: Each group of nail hole groups includes a first nail hole row, a second nail hole row and a third nail hole row which are arranged radially outward in sequence, the nail holes (21) on the second nail hole row are axially offset by half a nail hole relative to the nail holes (21) on the first nail hole row, and the nail holes (21) on the third nail hole row are arranged in the same axial direction as the nail holes (21) on the first nail hole row.
6. The distal end actuator of the laparoscopic stapler according to claim 5, characterized in that: The inner surface of the anvil of the nail support (2) is provided with a plurality of gripping structures (25), and the plurality of gripping structures (25) are distributed on both sides of the nail holes (21) of the first nail hole row and / or the third nail hole row.
7. The distal end actuator of the laparoscopic stapler according to claim 6, characterized in that: The gripping structure (25) is in the form of a triangular pyramid or a column, and the gripping structure (25) is 0.5 to 2 mm higher than the surface of the anvil.
8. The distal end actuator of the laparoscopic stapler according to any one of claims 4 to 7, characterized in that: The inner surface of the anvil (2) is provided with a plurality of pairs of guide portions (25'), and the guide portions (25') are arranged in pairs at the two ends of the nail nest (21).
9. The distal end actuator of the laparoscopic stapler according to claim 8, characterized in that: The guide portion (25') is a circular arc block structure, and each pair of the guide portions (25') comprises two circular arc block structures arranged opposite to each other. The guide portion (25') is 0.5 to 2 mm higher than the inner surface of the anvil seat (2).
10. The distal end actuator of the laparoscopic stapler according to claim 4, characterized in that: The nail nest (21) is an "8"-shaped structure with large ends and a small middle, and the depth at the two ends is greater than the depth in the middle.