Surgical stitching instrument and end actuator thereof
By employing a single-sided staple cartridge and a movable pusher in the actuator at the end of the surgical stapler, the problem of existing staplers being unable to distinguish tissues is solved, enabling precise cutting and suturing, reducing resource waste, and improving the flexibility and applicability of surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU FRANKENMAN MEDICAL EQUIP
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-01
AI Technical Summary
Existing suture devices cannot distinguish between necessary and unnecessary tissue during tissue removal and suturing, resulting in wasted resources and insufficient applicability for narrow-range resections.
Design an end effector for a surgical suture device that employs a single-sided staple cartridge and a movable pusher component. It achieves precise cutting and suturing by utilizing the width difference of the clamping components, eliminating the need for a traditional I-beam scalpel holder and enhancing flexibility.
It enables efficient cutting of unnecessary tissues and precise suturing of necessary tissues, reducing resource waste, and is suitable for narrow-range resections, improving the flexibility and adaptability of surgical procedures.
Smart Images
Figure CN224179751U_ABST
Abstract
Description
A surgical suture device and its end effector Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a surgical suture device and its end effector. Background Technology
[0002] In the medical field, tissue resection and suturing are common surgical procedures. However, existing staplers have some technical limitations in practical applications. For example, existing staplers typically have anastomotic staples on both sides of the cutting groove. While this design can suture tissue, it cannot distinguish the necessity of different tissues. Specifically, it sutures not only tissues that need to be preserved but also unwanted tissues (i.e., tissues to be resected), resulting in wasted staples. Furthermore, when the area of tissue resection is narrow, existing staplers, due to their fixed design, are difficult to adapt to this special situation, rendering them ineffective. Therefore, existing staplers suffer from both resource waste and insufficient applicability in specific situations when handling tissue resection and suturing, urgently requiring improvement to meet the needs of more precise and efficient surgeries. Summary of the Invention
[0003] One object of this invention is to provide a novel end effector for a surgical suture device that can more precisely cut unwanted tissue while suturing the tissue that needs to be preserved.
[0004] Another objective of this invention is to provide a surgical suture device comprising the aforementioned end effector.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] This invention provides an end effector for a surgical suture device, comprising a first clamping member, a second clamping member movably connected to the first clamping member and capable of clamping tissue in cooperation with it, and a pusher. The first clamping member has an axially extending cutting groove and a staple cartridge on which anastomoses are mounted. The cutting groove divides the surfaces of the first clamping member and the second clamping member opposite to each other into a first part and a second part located on both sides thereon. The width of the first part is greater than the width of the second part. The staple cartridge is located on the first clamping member where the first part is located. The second clamping member has an abutment surface capable of shaping the anastomoses. The pusher is slidably disposed in the cutting groove and is configured to move distally in response to the handle of the surgical suture device to cut and push the anastomoses out of the staple cartridge.
[0007] Preferably, the width of the first part is at least 1.5 times the width of the second part.
[0008] More preferably, the width of the first part is 1.5 to 2.5 times the width of the second part, and even more preferably 1.5 to 2 times. The design of the widths of the first and second parts satisfies both the need for cutting unnecessary tissue and the need for suturing that preserves tissue, while also reducing the size of the end effector and minimizing harm to the patient.
[0009] Preferably, the staple cartridge has at least two rows of radially arranged staple slots, each row of staple slots has multiple axially arranged staple slots, and the staple slots of adjacent rows of staple slots are staggered.
[0010] More preferably, the staple cartridge has two rows of staple grooves. Compared to a single row of staple grooves, two rows of staple grooves can more effectively fix tissue, make sutures tighter, reduce tissue gaps, and thus better prevent bleeding and leakage.
[0011] Preferably, the pusher includes a pusher body and a cutting blade and a pusher connected to the distal end of the pusher body and arranged side by side, wherein the pusher is located in the first part.
[0012] More preferably, the pusher body, the cutting blade, and the pusher are integrally formed.
[0013] Preferably, the second clamping member is rotatably connected to the first clamping member, and its proximal end has waist-shaped grooves on both sides for engaging with the slender body of the surgical stapler to achieve the opening and closing of the end effector. This end effector eliminates the traditional I-beam scalpel holder and does not damage tissue structures.
[0014] Another aspect of this utility model is to provide a surgical suture device, including an elongated body and a handle and an end actuator respectively connected to both ends of the elongated body, wherein the end actuator is as described above.
[0015] Preferably, the handle includes: a handle body, a trigger operably connected to the handle body, a drive assembly, and a locking assembly.
[0016] Preferably, the drive assembly includes a connecting piece, a push block, a closing drive member, and a firing drive member. One end of the connecting piece is rotatably and slidably connected to the trigger, and the other end is rotatably connected to the push block. The push block is axially slidably disposed on the handle body. The closing drive member is movably disposed on the handle body and has an initial state that abuts against the push block and a closed state that does not contact the push block. When the closing drive member is in the initial state, it can generate a closing action under the action of the push block to close the end effector. The firing drive member is movably disposed on the handle body and can generate a firing action under the action of the push block to cut and suture tissue.
[0017] More preferably, the closing drive member has a first stepped surface, a second stepped surface located below the first stepped surface, and an abutting surface connecting the first stepped surface and the second stepped surface.
[0018] Preferably, the locking assembly includes a locking member rotatably connected to the handle body, and an elastic member connected between the handle body and the locking member and giving the locking member a downward rotation tendency. The locking member can abut against the first stepped surface and hold the closing drive member in an initial state, or the locking member can abut against the abutting surface and hold the closing drive member in a closed state.
[0019] More preferably, the locking assembly further includes an operating knob connected to the locking member and at least partially exposed.
[0020] Preferably, the push block includes a push block body and a protrusion located at the upper end of the push block body, and the closing drive member abuts against the protrusion in the initial state.
[0021] Preferably, the trigger is rotatably connected to the handle body and a trigger reset elastic element is provided between the trigger and the handle body, the trigger reset elastic element causing the end of the trigger that engages with the connecting piece to always have a tendency to move towards the proximal end.
[0022] Preferably, the elongated body includes an outer tube and a closing rod and a firing rod movably disposed within the outer tube. The distal ends of the closing rod and the firing rod are respectively connected to the second clamping member and the pusher member, and the proximal ends are respectively connected to the closing drive member and the firing drive member.
[0023] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0024] The end effector of this invention achieves precise suturing of tissues that need to be preserved by setting a staple cartridge on one side of the cutting groove, while efficiently removing the tissue to be removed without wasting resources. By reducing the width of the second part, this end effector is particularly suitable for situations where the area to be removed is narrow, significantly improving the flexibility and adaptability of surgical operations.
[0025] The surgical suture device of this invention is easy to operate, has a simple structure, good flexibility, wide applicability, and broad application prospects. Attached Figure Description
[0026] Figure 1 is a schematic diagram of the surgical suture device provided in Example 1;
[0027] Figure 2 is an enlarged schematic diagram of part A in Figure 1;
[0028] Figure 3 is a schematic diagram of the structure when part A in Figure 1 is in the open state;
[0029] Figure 4 is a left view of the surgical suture provided in Example 1;
[0030] Figure 5 is a cross-sectional view of Figure 4 on plane BB;
[0031] Figure 6 is an enlarged schematic diagram of part C in Figure 5;
[0032] Figure 7 is a schematic diagram of the structure when part C in Figure 5 is in the open state;
[0033] Figure 8 is an enlarged schematic diagram of part D in Figure 5;
[0034] Figure 9 is a schematic diagram of the drive assembly and trigger provided in Embodiment 1, wherein the closing drive member is in the initial state;
[0035] Figure 10 is a structural schematic diagram of the drive assembly and trigger provided in Embodiment 1 from another angle, wherein the closing drive member is in the initial state;
[0036] Figure 11 is a structural schematic diagram of the drive assembly and trigger provided in Embodiment 1 from another angle, wherein the closing drive member is in a closed state;
[0037] Figure 12 is a structural schematic diagram of the first clamping member provided in Embodiment 1;
[0038] Figure 13 is a structural schematic diagram of the second clamping member provided in Embodiment 1;
[0039] Figure 14 is a structural schematic diagram of the pusher component provided in Embodiment 1;
[0040] Wherein: 1. End effector; 11. First clamping member; 111. First feed groove; 112. First part; 113. Second part; 114. Nail groove; 12. Second clamping member; 121. Nail-stopping surface; 122. Second feed groove; 123. Waist-shaped groove; 13. Pusher; 131. Pusher body; 132. Cutting blade; 133. Nail pusher;
[0041] 2. Slender body; 21. Outer tube; 22. Closing rod; 221. Rotating shaft; 23. Firing lever;
[0042] 3. Handle; 31. Handle body; 32. Trigger; 33. Trigger reset elastic element; 34. Connecting piece; 35. Push block; 351. Push block body; 352. Protrusion; 36. Closing drive element; 361. First step surface; 362. Second step surface; 363. Abutment surface; 37. Firing drive element; 38. Locking element; 381. Operating knob; 39. Elastic element. Detailed Implementation
[0043] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0044] In the description of the embodiments of this utility model, it should be understood that "distal end" refers to the end of the instrument or component away from the operator, and "proximal end" refers to the end of the instrument or component closer to the operator; "axial direction" refers to the direction parallel to the line connecting the centers of the distal and proximal ends of the instrument or component; "inner" and "outer" are positions defined by distance relative to the center of the instrument or component, where "inner" is the position closer to the center of the instrument or component, and "outer" is the position away from the center of the instrument or component; "upper" and "lower" refer to the orientation of the instrument in its actual use or working state. The above description of directional terms is only for the convenience of describing the embodiments of the present invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.
[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0046] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0047] The foregoing disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model. To simplify the disclosure of the embodiments of this utility model, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the embodiments of this utility model. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0048] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0049] Example 1
[0050] A surgical suture device, as shown in Figures 1 to 14, includes an end effector 1, an elongated body 2, and a handle 3.
[0051] The end effector 1 includes a first clamping member 11, a second clamping member 12, and a pusher member 13.
[0052] Referring to Figures 1 to 3 and Figure 12, the first clamping member 11 is fixedly connected to the elongated body 2, and has an axially extending cutting groove (i.e., the first cutting groove 111) and a staple cartridge containing staples. The first cutting groove 111 divides the surfaces of the first clamping member 11 and the second clamping member 12 opposite to each other into a first part 112 and a second part 113 located on either side. The staple cartridge is located on the first clamping member 11 in the first part 112, while the first clamping member 11 in the second part 113 does not have a staple cartridge. In other words, the staple cartridge is located on one side of the first clamping member 11. By placing the staple cartridge on one side, it is convenient to cut unwanted tissue and suture the tissue that needs to be retained. The width of the first part 112 is at least 1.5 times the width of the second part 113, preferably 1.5 to 2 times. The design of the widths of the first part 112 and the second part 113 facilitates the miniaturization of the end effector 1 and allows for more precise tissue cutting. The staple cartridge has at least two rows of radially arranged staple slots, each row having multiple axially arranged staple slots 114, with the staple slots 114 of adjacent rows staggered. In this embodiment, the staple cartridge has two rows of staple slots, and the staple slots 114 of the staple slot groups are provided with matching staples. To facilitate the ejection of the matching staples, the staple cartridge is also provided with a staple pusher block. The structure and installation method of the staple pusher block and the matching staples can refer to the prior art.
[0053] The pusher 13 is slidably disposed within the first cutting groove 111, configured to move distally in response to the handle 3 of the surgical stapler to cut and eject the staples from the staple cartridge. As shown in Figure 14, the pusher 13 includes a pusher body 131 and a cutting blade 132 and a staple pusher 133 connected to the distal end of the pusher body 131 and arranged side by side. The staple pusher 133 is located in the first part 112, and the pusher body 131, the cutting blade 132, and the staple pusher 133 are integrally formed. This pusher 13 eliminates the traditional I-beam blade holder and does not damage the tissue structure.
[0054] The second clamping member 12 is rotatably connected to the first clamping member 11 and can cooperate with the first clamping member 11 to clamp the tissue. As shown in FIG13, the second clamping member 12 has an abutment surface 121 that can form the staple, and also has a second cutting groove 122 that is disposed opposite to the first cutting groove 111.
[0055] As shown in Figures 5 to 8, the elongated body 2 includes an outer tube 21 and a closing rod 22 and a firing rod 23 movably disposed within the outer tube 21. The closing rod 22 has pivots 221 on its distal left and right sides, which engage with waist-shaped grooves 123 on the left and right sides of the second clamping member 12 to allow the second clamping member 12 to rotate relative to the first clamping member 11, thus opening or closing. Specifically, when the closing rod 22 moves distally in response to the handle 3, it pushes the second clamping member 12 to rotate closer to the first clamping member 11, and the end effector 1 switches from an open state to a closed state. The closing rod 22 can refer to existing technology. The distal end of the firing rod 23 is connected to a pusher 13, which responds to the handle 3 and moves distally with the pusher 13 to cut and suture tissue. The firing rod 23 can also refer to existing technology and will not be described further.
[0056] As shown in Figures 1, 5, and 8 to 11, the handle 3 includes a handle body 31, a trigger 32, a drive assembly, and a locking assembly. The proximal end of the closing lever 22 is movably connected to the handle body 31 by a spring, which tends to move the closing lever 22 towards the proximal end, so that the end effector 1 remains open in the initial state. The trigger 32 is operably connected to the handle body 31. In this embodiment, the trigger 32 is rotatably connected to the handle body 31, and a trigger return elastic element 33 is provided between the trigger 32 and the handle body 31. The trigger return elastic element 33 ensures that the operating end of the trigger 32 always tends to move towards the distal end, that is, the end that engages with the connecting piece 34 always tends to move towards the proximal end.
[0057] The drive assembly includes a connecting piece 34, a push block 35, a closing drive member 36, and a firing drive member 37. One end of the connecting piece 34 is rotatably and slidably connected to the trigger 32, and the other end is rotatably connected to the push block 35. The push block 35 is axially slidably disposed on the handle body 31, and includes a push block body 351 and a protrusion 352 disposed at the upper end of the push block body 351. The closing drive member 36 is movably disposed on the handle body 31, and its distal end is connected to the closing lever 22. The closing drive member 36 has a first stepped surface 361, a second stepped surface 362 located below the first stepped surface 361, and an abutment surface 363 connecting the first stepped surface 361 and the second stepped surface 362. The closing drive member 36 has an initial state of contacting the push block 35 and a closed state of not contacting the push block 35. When the closing drive member 36 is in the initial state, it abuts against the protrusion 352 and can produce a closing action under the action of the push block 35. That is, the protrusion 352 pushes the closing rod 22 to overcome the elastic force of the spring on it and slides towards the distal end, thereby closing the end actuator 1. The firing drive member 37 is movably disposed on the handle body 31, its distal end is connected to the firing rod 23, and can produce a firing action under the action of the push block 35, that is, slides towards the distal end, thereby pushing the pusher 13 to slide towards the distal end for cutting and suturing tissue.
[0058] The locking assembly is configured to hold the closing actuator 36 in an initial or closed state. The locking assembly includes a locking member 38 rotatably connected to the handle body 31 and an elastic member 39 connected between the handle body 31 and the locking member 38, which tends to cause the locking member 38 to rotate downwards. In the initial state, the locking member 38 abuts against the first stepped surface 361 under the action of the elastic member 39, thereby causing the proximal end of the closing actuator 36 to tend to move towards the push block 35. The closing actuator 36 abuts against the protrusion 352 of the push block 35 and remains in the initial state. When trigger 32 is pressed, trigger 32 moves the connecting piece 34 and push block 35 towards the distal end. The protrusion 352 on push block 35 pushes the closing drive member 36 towards the distal end, causing end effector 1 to switch from the open state to the closed state. When the first step surface 361 passes the locking member 38, the locking member 38 rotates downward under the action of the elastic member 39 and abuts against the abutment surface 363. At this time, end effector 1 remains in the closed state. At the same time, when the locking member 38 disengages from the first step surface 361, the proximal end of the closing drive member 36 returns to its original position and separates from the push block 35. When trigger 32 is pressed again, push block 35 can continue to move towards the distal end, thereby pushing the firing drive member 37 towards the distal end, thus completing the firing action. In this embodiment, the locking assembly also includes an operating knob 381 connected to the locking member 38 and at least partially exposed. By rotating the operating knob 381, the contact between the locking member 38 and the abutment surface 363 of the closing drive member 36 can be removed, and the closing drive member 36 is reset under the action of the spring force thereon.
[0059] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. An end effector of a surgical suture device, comprising a first clamping member (11), a second clamping member (12) movably connected to the first clamping member (11) and capable of cooperating with it to clamp tissue, and a pusher (13), characterized in that, The first clamping member (11) has an axially extending cutting groove and a staple cartridge on which the staples are mounted. The cutting groove divides the surfaces of the first clamping member (11) and the second clamping member (12) opposite to each other into a first part (112) and a second part (113) located on both sides thereon. The width of the first part (112) is greater than the width of the second part (113). The staple cartridge is located on the first clamping member (11) where the first part (112) is located. The second clamping member (12) has an abutment surface (121) capable of shaping the staples. The pusher (13) is slidably disposed in the cutting groove and is configured to move distally in response to the handle (3) of the surgical stapler to cut and push the staples out of the staple cartridge.
2. The end effector of the surgical suture device according to claim 1, characterized in that, The width of the first part (112) is 1.5 to 2.5 times the width of the second part (113).
3. The end actuator of the surgical suture device according to claim 1, characterized in that, The staple cartridge has two rows of radially arranged staple slots, each row of staple slots has multiple axially arranged staple slots (114), and the staple slots (114) of the two rows of staple slots are staggered.
4. The end actuator of the surgical suture device according to claim 1, characterized in that, The pusher (13) includes a pusher body (131) and a cutting blade (132) and a pusher (133) connected to the far end of the pusher body (131) and arranged side by side, the pusher (133) being located in the first part (112).
5. The end actuator of the surgical suture device according to claim 4, characterized in that, The pusher body (131), the cutting blade (132), and the pusher (133) are integrally formed.
6. A surgical suture device, comprising an elongated body (2) and handles (3) and end actuators (1) respectively connected to both ends of the elongated body (2), characterized in that, The end effector (1) is the end effector (1) according to any one of claims 1 to 5. The handle (3) includes: a handle body (31); a trigger (32) operably connected to the handle body (31); and a drive assembly including a connecting piece (34), a push block (35), a closing drive member (36), and a firing drive member (37). One end of the connecting piece (34) is rotatably and slidably connected to the trigger (32), and the other end is rotatably connected to the push block (35). The push block (35) is axially slidably disposed on the handle body (31). The closing drive member (36) is movably disposed on the handle body (31). The handle body (31) has an initial state that abuts against the push block (35) and a closed state that does not contact the push block (35). When the closing drive (36) is in the initial state, it can generate a closing action under the action of the push block (35) to close the end effector (1). The firing drive (37) is movably disposed on the handle body (31) and can generate a firing action under the action of the push block (35) to cut and suture the tissue. The locking component is configured to keep the closing drive (36) in the initial state or the closed state.
7. The surgical suture device according to claim 6, characterized in that, The closing drive (36) has a first stepped surface (361), a second stepped surface (362) located below the first stepped surface (361), and an abutment surface (363) connected between the first stepped surface (361) and the second stepped surface (362); the locking assembly includes a locking member (38) rotatably connected to the handle body (31), and an elastic member (39) connected between the handle body (31) and the locking member (38) and giving the locking member (38) a tendency to rotate downward, the locking member (38) being able to abut against the first stepped surface (361) and hold the closing drive (36) in an initial state, or the locking member (38) being able to abut against the abutment surface (363) and hold the closing drive (36) in a closed state.
8. The surgical suture device according to claim 7, characterized in that, The locking assembly also includes an operation knob (381) connected to the locking member (38) and at least partially exposed on the handle body (31).
9. The surgical suture device according to claim 6, characterized in that, The push block (35) includes a push block body (351) and a protrusion (352) located at the upper end of the push block body (351). The closing drive member (36) abuts against the protrusion (352) in the initial state. And / or, the trigger (32) is rotatably connected to the handle body (31) and a trigger reset elastic member (33) is provided between it and the handle body (31). The trigger reset elastic member (33) causes the end of the trigger (32) that engages with the connecting piece (34) to always have a tendency to move towards the proximal end.
10. The surgical suture device according to claim 6, characterized in that, The elongated body (2) includes an outer tube (21) and a closing rod (22) and a firing rod (23) movably disposed within the outer tube (21). The distal ends of the closing rod (22) and the firing rod (23) are respectively connected to the second clamping member (12) and the pusher member (13), and the proximal ends are respectively connected to the closing drive member (36) and the firing drive member (37).