Surgical stapler with widened anvil portion

Abstract

A surgical stapler includes an anvil portion, a portion of a tissue contacting surface of the anvil portion located on one side of a stapling groove having a first width and a portion of the tissue contacting surface located on the other side of the stapling groove having a second width, the first width being greater than the second width. Such an arrangement allows a certain error to be allowed as much as possible when firing the retaining pin, for example, even if the retaining pin is not accurately received by the retaining pin recess, the end of the retaining pin abuts against an enlarged tissue contact surface of the anvil portion without miss the anvil portion into tissue. The retaining pin abuts against the enlarged tissue contact surface, thereby resisting actuation of the anvil portion and cartridge towards the closed configuration, which enables an operator to perceive anomalies in actuation of the guide pin. In addition, the retaining pin abutting against the tissue contact surface of the anvil portion may return to the retaining pin recess under subsequent slight wobble or similar operations to allow subsequent surgical procedures.

Description

Technical Field

[0001] This invention relates to the field of surgical instruments, and more specifically, to a surgical suture device / anastomosis device. Background Technology

[0002] Surgical staplers / anastomosers are commonly used to deploy staples into tissue to reduce or eliminate tissue bleeding, such as when tissue is cut and needs to be sutured to promote healing. Surgical staplers / anastomosers (e.g., linear staplers / anastomosers, arc-shaped staplers / anastomosers) may include an end effector assembly having a staple cartridge and an anvil, the end effector assembly being capable of securing tissue between the staple cartridge and the anvil, wherein the staple cartridge includes a cartridge configured to removably store surgical staples therein, and the anvil includes a staple-forming groove for shaping the staples. Such surgical staplers / anastomosers typically include a closure system that allows movement of one of the staple cartridge and the anvil relative to the other.

[0003] As described above, a surgical stapler / anastomosing device can be configured to close the cartridge and anvil of the end effector assembly to form a closed configuration for capturing tissue between the cartridge and anvil. In the closed configuration, the cartridge and anvil apply clamping forces to the tissue to hold it between the anvil and cartridge. Staples are then driven to deform from the cartridge and abut against the staple-forming grooves of the anvil, thereby securing the tissue layers together. Staples are typically deployed in several staple threads or rows for more reliable securing of the tissue layers together. The end effector assembly may not include a cutting member or may include a cutting member capable of advancing between staple rows to cut the tissue after the tissue layers have been sutured together.

[0004] like Figure 1 An existing end effector 16 is shown. A U-shaped distal support structure 48 defining the end effector 16 has a cartridge mounting portion 52 that removably receives a cartridge 160. The end effector 16 is also configured to laterally receive or “reload” tissue within the gap between the cartridge housing 162 and the anvil 210 defined within the cartridge 160 mounted within the end effector 16. The end effector 16 also includes a retaining pin 176 that can extend distally from the cartridge 160 in the direction of the arrow in the figure for capturing tissue between the anvil 210 and the cartridge housing 162. The retaining pin can be, for example... Figure 1 The manipulator is operated by pushing the pin from the handle end, or by the user pushing it from the end effector, so that the retaining pin is received by the corresponding position on the anvil. However, the retaining pin can easily deviate from its intended target. Once it deviates, it may miss the anvil and penetrate the surrounding tissue, failing to achieve the subsequent surgical purpose and potentially causing tissue damage.

[0005] Therefore, there is a need to provide a surgical suture device that can at least partially solve the above problems. Summary of the Invention

[0006] This invention provides a surgical stapler having a widened anvil portion. Specifically, a retaining pin groove is offset to one side of the anvil portion, on which the anvil portion extends outwards as a whole, thus achieving a greater width. This arrangement allows for a certain degree of error when firing the retaining pin; for example, even if the retaining pin is not accurately received by the retaining pin groove, the end of the retaining pin will still abut against the enlarged tissue contact surface of the anvil portion, preventing it from missing the anvil portion and entering the tissue. The retaining pin abutting against the enlarged tissue contact surface applies a distally resisting pushing force to the anvil, hindering the movement of the anvil portion and the staple cartridge toward a closed configuration, or preventing the anvil portion and the staple cartridge from actuating to a closed configuration. This allows the operator to perceive any abnormality in the guide pin actuation. Furthermore, the retaining pin abutting against the tissue contact surface of the anvil portion can return to the retaining pin groove with subsequent slight shaking or similar operations, allowing for subsequent surgical procedures.

[0007] According to one aspect of the invention, a surgical stapler is provided, the surgical stapler comprising a handle assembly for an operator to hold and an end actuator located distal to the handle assembly in a first direction, the end actuator comprising an anvil portion and a staple cartridge, the anvil portion and the staple cartridge being configured to be movable relative to each other along the first direction between an open configuration and a closed configuration, the anvil portion being formed as an elongated strip extending along a second direction perpendicular to the first direction.

[0008] The surgical stapler is configured to fire surgical staples from the staple cartridge toward the anvil. The tissue contact surface of the anvil facing the staple cartridge has a staple-forming groove for receiving and shaping the surgical staples, and a retaining pin groove for receiving retaining pins disposed on the staple cartridge.

[0009] The stapling groove has a centerline extending along the second direction, the retaining pin groove is offset to one side relative to the centerline, and the portion of the tissue contact surface located on one side of the stapling groove has a first width, the portion of the tissue contact surface located on the other side of the stapling groove has a second width, and the first width is greater than the second width.

[0010] In one embodiment, the anvil portion includes an anvil plate, which is an integral component and the surface of the anvil plate facing the staple cartridge constitutes the tissue contact surface.

[0011] In one embodiment, the first width is greater than or equal to 2.5 mm, and the second width is greater than or equal to 1.5 mm.

[0012] In one embodiment, the first width is 2.5mm-3.0mm, and the second width is 1.5mm-2mm.

[0013] In one embodiment, one side of the tissue contact surface has a left boundary line extending along the second direction, and the other side of the tissue contact surface has a right boundary line extending along the second direction, wherein the distance between the retaining pin groove and the left boundary line is greater than or equal to 1.3 mm, and the distance between the retaining pin groove and the right boundary line is greater than or equal to 2.8 mm.

[0014] In one embodiment, the distance between the retaining pin groove and the left boundary line is 1.3mm-1.6mm, and the distance between the retaining pin groove and the right boundary line is 2.8mm-3.1mm.

[0015] In one embodiment, the anvil portion includes a support member comprising a support body mounted within the anvil portion and an exposed cap portion, the cap portion being entirely located on one side in a second direction of the anvil board, and the width of the cap portion at its mating point with the anvil board being the same as the width of the anvil board.

[0016] In one embodiment, the cap has a width that tapers away from the anvil, and the size of the cap in the first direction also tapers away from the anvil.

[0017] In one embodiment, the support is made of plastic and the cutting board is made of stainless steel.

[0018] In one embodiment, the surgical stapler includes a shaft assembly extending distally from the handle assembly, the distal end of the shaft assembly forming a support portion for mounting the staple cartridge. The surgical stapler includes a first side workpiece and a second side workpiece clamped together in a third direction, the first side workpiece being located on the same side of the retaining pin groove relative to the centerline, a connecting segment being provided between the anvil portion and the support portion, and the first side workpiece forming an integral first side surface of the anvil portion, the connecting segment, and the support portion, wherein the integral first side surface is planar, and the first direction, the second direction, and the third direction are orthogonal.

[0019] In one embodiment, the second side workpiece forms an integral second side surface of the anvil portion, the connecting section, and the support portion, and the second side surface has a step.

[0020] In one embodiment, the anvil portion has a uniform width at all points in the second direction.

[0021] In one embodiment, a trigger for operably firing the surgical nail is disposed on the shank assembly, and a retaining pin operating component for operably firing the retaining pin is disposed on the end effector.

[0022] In one embodiment, a chamfered feature structure is formed around the retaining pin groove for guiding the retaining pin into the retaining pin groove.

[0023] In one embodiment, the chamfered feature includes a continuous annular portion surrounding the retaining pin groove. Attached Figure Description

[0024] The invention, its features and advantages, will be better understood through the following description, taken in conjunction with the accompanying drawings and exemplary embodiments. In the following description and drawings, similar parts are labeled with similar numbers. The drawings are not necessarily drawn to scale, and for clarity and brevity, some parts may be omitted, and some drawings may be drawn in an exaggerated or simplified manner.

[0025] Figure 1 An end effector of a conventional surgical suture is shown;

[0026] Figure 2 An exemplary perspective view of a surgical suture device according to one embodiment of the present invention is shown;

[0027] Figure 3 for Figure 2 An enlarged view of the end effector section;

[0028] Figure 4 for Figure 3 The front view of the end effector;

[0029] Figure 5 for Figure 3 A view of the end effector from another side;

[0030] Figure 6 for Figures 2-5 Side view of the anvil portion of the end effector;

[0031] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0032] Figure 8A for Figure 6 A standalone 3D view of the cutting board;

[0033] Figures 8B-8G for Figure 6 The six views of the cutting board in the image, where Figure 8B This is the front view of the cutting board. Figure 8C This is a back view of the cutting board. Figure 8D This is the left view of the cutting board. Figure 8E This is the right view of the cutting board. Figure 8F This is a top view of the cutting board. Figure 8G This is a bottom view of the cutting board. Detailed Implementation

[0034] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely exemplary embodiments of the present invention, and those skilled in the art can conceive of other ways to implement the present invention based on these exemplary embodiments, and such other ways also fall within the scope of the present invention.

[0035] Figures 2-8G An exemplary surgical suture device according to one embodiment of the present invention is shown. It should first be noted that the directional and positional terms involved in this invention should be understood as relative directions and relative positions, and not as absolute directions and absolute positions. The directional and positional terms involved in this invention can be referenced... Figures 2-7 This invention relates to the orientation of surgical suture devices. The "first direction D1," "second direction D2," and "third direction D3" mentioned in this invention refer to three orthogonal directions in space. Among them, in... Figure 1 In the orientation of the surgical suture device shown, "first direction D1" and "third direction D3" are approximately horizontal, "second direction D2" is generally understood to be vertical, and "first direction D1" can be understood as the direction containing the distal direction (referring to the direction away from the operator) and the proximal direction (referring to the direction closer to the operator). Unless otherwise specified, the "width" mentioned in this invention refers to the dimension of the component in the third direction D3.

[0036] First refer to Figure 2 An exemplary right-angle linear surgical stapler configured to suture and cut tissue in a variety of non-endoscopic (“open”) surgical procedures, including, for example, colorectal, thoracic, and bariatric surgeries. This surgical stapler 100 (also referred to as a “right-angle linear cutter”) generally includes a handle assembly 20, a shaft assembly 24 extending distally from the handle assembly 20, and an end effector 30 located at the distal end of the shaft assembly 24. The end effector 30 is configured in a “right-angle” configuration such that the end effector 30 clamps, sutures, and cuts tissue in a plane extending laterally at right angles to the longitudinal axis defined by the shaft assembly.

[0037] The handle assembly 20 includes a housing 21 defining a pistol grip 23 and a pair of pivotable triggers 22, which may include a closing trigger and a firing trigger. The closing trigger and the firing trigger are operatively coupled to an end effector 30 via a shaft assembly 24, such that the end effector 30 is configured to close and thereby clamp tissue in response to actuation of the closing trigger, and subsequently suture and cut the tissue in response to actuation of the firing trigger.

[0038] The end effector 30 includes an anvil portion 32 and a staple cartridge. In this embodiment, the staple cartridge... Figures 2-8G Not shown in the image, but can be referenced. Figure 1 The diagram shows the general structure and location of the staple cartridge 160 of the end effector 16. A support portion 31 for mounting the staple cartridge is provided at the distal end of the shaft assembly 24. The anvil portion 32 and the staple cartridge are configured to move relative to each other along a first direction D1 between an open configuration and a closed configuration. The anvil portion 32 is formed as an elongated strip extending along a second direction D2 perpendicular to the first direction D1.

[0039] The surgical stapler 100 is provided with several actuation systems for operating the end effector 30 via the handle assembly 20 during surgical procedures on a patient. Specifically, the surgical stapler 100 includes a retaining pin actuation system, a closure system, and a firing system. The retaining pin actuation system is operable to push the retaining pin distally to initially retain tissue within the end effector 30; in this embodiment, the retaining pin... Figures 2-8G Not shown in the image, but can be referenced. Figure 1 The approximate structure and location of the retaining pin 176 of the end effector 16 are shown. The closure system is operable to clamp tissue with the end effector 30; the firing system is operable to subsequently suture and cut tissue with the end effector 30. Although the teachings of the invention are shown and described in the context of a “linear” surgical suture 100 configured to apply linear staples and linear cutting lines in tissue, it should be understood that any one or more of the teachings of the invention can be applied to surgical sutures configured to apply staples and tissue cutting lines with a non-linear (e.g., curved) configuration, such as surgical sutures of the type disclosed in any one or more of the references incorporated herein by reference.

[0040] refer to Figures 3-5The end effector is configured to fire surgical staples toward the anvil portion 32 under the action of the firing system. The anvil portion 32 has a staple-forming groove 323 for receiving and shaping the surgical staples, and a retaining pin groove 324 for receiving retaining pins, formed in the tissue contact surface facing the staple cartridge (i.e., facing proximity). The staple-forming groove 323 has a center line X extending along a second direction D2. In this embodiment, the staple-forming grooves 323 are arranged in two rows—a first row of staple-forming grooves 3231 and a second row of retaining grooves 3232. Each row of staple-forming grooves 323 extends along the second direction D2, and the two rows of staple-forming grooves 323 are arranged side-by-side in a third direction D3. In this embodiment, the center line X is located between the two rows of staple-forming grooves 323. In other embodiments, more rows of staple-forming grooves 323 may be provided, with the center line X located at the exact center of all rows of staple-forming grooves 323 along the third direction D3.

[0041] refer to Figures 6-7 The pin groove 324 is offset to one side relative to the centerline X. Figures 6-7 From the perspective of [unclear], the retaining pin groove 324 is located on the left half of the tissue contact surface. In order to allow the anvil portion 32 to abut against the end of the retaining pin when the retaining pin is fired and is not accurately received by the retaining pin groove 324, the left half of the anvil portion 32 is extended to the left as a whole. In other words, the portion of the tissue contact surface located on the left side of the stapling groove 323 has a first width W1 (the first width W1 is the minimum distance between the stapling groove 323 and the left boundary line 325 of the tissue contact surface), and the portion of the tissue contact surface located on the right side of the stapling groove 323 has a second width W2 (the second width W2 is the minimum distance between the stapling groove 323 and the right boundary line 326 of the tissue contact surface), and the first width W1 is greater than the second width W2.

[0042] Specifically, in some embodiments, the first width W1 is greater than or equal to 2.5 mm, preferably 2.5 mm to 3.0 mm; the second width W2 is greater than or equal to 1.5 mm, preferably 1.5 mm to 2 mm. It should be noted that the edge of the rivet groove 232 may have a chamfer. In this embodiment, the measurement of both the first width W1 and the second width W2 can begin from the outer contour line of the chamfer of the rivet groove 232. However, since the chamfer size is small, in some embodiments, the measurement of the first width and the second width can also begin from the inner contour line of the chamfer of the rivet groove.

[0043] Continue to refer to Figure 7Preferably, the outer periphery of the retaining pin groove 324 is formed with a chamfered feature structure 3241 for guiding the retaining pin into the retaining pin groove 324. The chamfered feature structure 3241 may be, for example, a continuous annular shape surrounding the retaining pin groove 324, such that the end of the retaining pin can be guided into the retaining pin groove 324 by the chamfered feature structure 3241 at any position around the retaining pin groove 324. In other embodiments not shown, the chamfered feature structure 3241 may also have other forms; for example, the chamfered feature structure may be provided only on the left side of the retaining pin groove.

[0044] In this embodiment, the anvil portion 32 includes an integral anvil plate 321 (the anvil plate can also be called an anvil base), and the tissue contact surface of the anvil portion 32 is completely formed on the anvil plate 321. The pin-forming groove 323 and the retaining pin groove 324 are both formed on the anvil plate 321. In order to widen the left side of the anvil portion 32, the anvil plate 321 also has a larger width, especially in the area to the left of the pin-forming groove 323.

[0045] The left half of the tissue contact surface where the retaining pin groove 324 is located is widened, thus increasing the distance between the retaining pin groove 324 and the left boundary line of the tissue contact surface. However, due to the eccentric arrangement of the retaining pin groove 324, the distance between the retaining pin groove 324 and the left boundary line may still be smaller than its distance from the right boundary line. For example, the distance S1 between the retaining pin groove 324 and the left boundary line 325 is greater than or equal to 1.3 mm, preferably 1.3 mm to 1.6 mm; the distance S2 between the retaining pin groove 324 and the right boundary line 326 is greater than or equal to 2.8 mm, preferably 2.8 mm to 3.1 mm. As mentioned above, the edge of the retaining pin groove 324 has a chamfered feature structure 3241. In this embodiment, the measurement of distances S1 and S2 can both start from the outer contour line of the chamfered feature structure 3241. However, since the size of the chamfered feature structure 3241 is small, in some embodiments, the measurement of distances S1 and S2 can also start from the inner contour line of the chamfered feature structure.

[0046] In this embodiment, the left and right edges of the tissue contact surface of the anvil portion 32 are provided with transition surfaces or chamfered cut surfaces. The left boundary line 325 and right boundary line 326 mentioned in this embodiment refer to the transition surfaces or chamfered cut surfaces near the proximal side (i.e., near the center line X, see center line X). Figure 6 The measurements of the edge lines, dimensions W1, W2, S1, and S2, are all based on this. Since the dimensions of the transition surface or chamfered section are relatively small, other embodiments may also have other definitions of the left and right boundary lines. Embodiments where the corresponding dimensions are obtained through measurements under other definitions also fall within the scope of protection of this invention.

[0047] The anvil portion 32 has a uniform width at all points along the second direction D2, that is, the anvil portion 32 has the same width at its top and bottom (e.g., at one end and the other end along the second direction D2).

[0048] Turn back Figures 3-4 A connecting section 33 is provided between the anvil portion 32 and the support portion 31, forming a generally integral U-shaped or hook-shaped component. In fact, the surgical suture device includes a left-side workpiece (first-side workpiece) and a right-side workpiece (second-side workpiece) clamped together in a third direction D3. The left-side workpiece forms an integral left-side surface 327 (first-side surface) of the anvil portion 32, connecting section 33, and support portion 31. The left-side surface 327 is planar; in other words, the sidewalls of the connection area 324 between the anvil portion 32 and the connecting section 33, the sidewalls of the anvil portion 32, and the sidewalls of the connecting section 33 are in the same plane. This flat configuration also benefits from the widening of the left side of the anvil portion 32, resulting in a smooth connection between the connecting section 33 and the anvil portion 32 without protrusions or steps. For comparison, see Reference Figure 5 The workpiece on the right side forms an integral right-side surface 328 (second side surface) comprising the anvil portion 32, connecting section 33, and supporting portion 31. The sidewall of the connecting section 33 protrudes beyond the sidewall of the anvil portion 32, creating a stepped portion at the connection point 324 between the connecting section 33 and the anvil portion 32. This results in the right-side surface 328 being a stepped surface rather than a planar surface. In other alternative embodiments, at the right-side surface of the anvil portion 32 perpendicular to the third direction D3, the sidewalls of the connection area between the anvil portion 32 and the connecting section 33, the sidewall of the anvil portion 32, and the sidewall of the connecting section 33 may also be in the same plane.

[0049] In this embodiment, the retaining pin groove 324 is offset to the left relative to the center line X. Therefore, in this embodiment, the integral left surface 327 formed by the left workpiece is planar, while the integral right surface 328 formed by the right workpiece opposite to the left workpiece is non-planar. In some embodiments, the retaining pin groove may be offset to the right relative to the center line. In this case, the integral right surface formed by the right workpiece is planar, while the integral left surface formed by the left workpiece opposite to it can be non-planar.

[0050] refer to Figures 3-5The top of the cutting board 321 is provided with a cap 322, which is located entirely on the top side of the cutting board 321, that is, entirely on one side of the cutting board 321 in the second direction D2. The cap 322 does not have a section extending downward along the side wall of the anvil portion 32. Specifically, the cap 322 is actually part of the support member inside the end effector 30. The support member includes a support body (not shown in the figure) installed inside the anvil portion 32 and the exposed cap 322. Preferably, the support member is made of plastic, and the side walls of the cutting board 321 and the anvil portion 32 are made of stainless steel. This arrangement ensures the strength of the anvil portion 32 while reducing the overall weight. Figures 8A-8G The structure of the anvil plate 321 of the anvil seat 32 is shown in detail.

[0051] The cap 322 serves a guiding function. Specifically, the cap 322 has a width that tapers away from the cutting board 321, and the size of the cap 322 in the first direction D1 also tapers away from the cutting board 321. Preferably, the width of the cap 322 at the joint with the cutting board 321 is the same as the width of the cutting board 321.

[0052] The anvil portion 32 configuration of the above embodiment is particularly suitable for surgical staplers 100 that operate the retaining pin distally. Specifically, a trigger for operably firing the surgical staple is provided on the shank assembly 20, while a retaining pin operating member for operably firing the retaining pin is provided on the end actuator 30. Operating the retaining pin distally can easily cause retaining pin misalignment, and the widened anvil portion 32 provided in the above embodiment can overcome this deficiency.

[0053] The surgical stapler provided by this invention allows for minimal positional deviation during the firing of the retaining pin. For example, even if the retaining pin is not accurately received by the retaining pin groove, the end of the retaining pin will still abut against the enlarged tissue contact surface of the anvil, preventing it from missing the anvil and entering the tissue. The retaining pin abutting against the enlarged tissue contact surface applies a distally resisting pushing force to the anvil, hindering the movement of the anvil and staple cartridge towards the closed configuration, or preventing the anvil and staple cartridge from actuating into the closed configuration. This allows the operator to perceive any abnormality in the guide pin actuation. Furthermore, the retaining pin abutting against the tissue contact surface of the anvil can return to the retaining pin groove with subsequent slight shaking or similar operations, allowing for subsequent surgical procedures.

[0054] The scope of protection of this invention is defined only by the claims. The terms "various embodiments," "some embodiments," "one embodiment," or "embodiment" used in this specification mean that a specific feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment. Therefore, the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment" appearing in this specification do not necessarily refer to the same embodiment. Furthermore, in one or more embodiments, specific features, structures, or characteristics can be combined in any suitable manner. Therefore, unless otherwise specified, a specific feature, structure, or characteristic shown or described in connection with one embodiment may be combined in whole or in part with features, structures, or characteristics of one or more other embodiments, and the resulting modifications and variations also fall within the scope of this invention.

Claims

1. A surgical suture device comprising a handle assembly (20) for an operator to hold and an end effector (30) located distal to the handle assembly in a first direction (D1), the end effector (30) comprising an anvil portion (32) and a staple cartridge, the anvil portion (32) and the staple cartridge being configured to be movable relative to each other in the first direction between an open configuration and a closed configuration, the anvil portion (32) being formed as an elongated strip extending in a second direction (D2) perpendicular to the first direction (D1). in, The surgical stapler is configured to fire surgical staples from the staple cartridge toward the anvil portion (32). The tissue contact surface of the anvil portion (32) facing the staple cartridge has a staple-forming groove (323) for receiving and shaping the surgical staples, and a retaining pin groove (324) for receiving retaining pins disposed on the staple cartridge. The stapling groove (323) has a centerline (X) extending along the second direction (D2), the retaining pin groove (324) is offset to one side relative to the centerline (X), and the portion of the tissue contact surface located on one side of the stapling groove (323) has a first width (W1), and the portion of the tissue contact surface located on the other side of the stapling groove (323) has a second width (W2), wherein the first width (W1) is greater than the second width (W2).

2. The surgical suture device according to claim 1, characterized in that, The anvil portion (32) includes an anvil (321), which is an integral component and the surface of the anvil facing the staple cartridge constitutes the tissue contact surface.

3. The surgical suture device according to claim 1, characterized in that, The first width (W1) is greater than or equal to 2.5 mm, and the second width (W2) is greater than or equal to 1.5 mm.

4. The surgical suture device according to claim 3, characterized in that, The first width (W1) is 2.5mm-3.0mm, and the second width (W2) is 1.5mm-2mm.

5. The surgical suture device according to any one of claims 1-4, characterized in that, The tissue contact surface has a left boundary line (325) extending along the second direction (D2) on one side, and a right boundary line (326) extending along the second direction (D2) on the other side, wherein the distance (S1) between the retaining pin groove (324) and the left boundary line (325) is greater than or equal to 1.3 mm, and the distance between the retaining pin groove (324) and the right boundary line (S2) is greater than or equal to 2.8 mm.

6. The surgical suture device according to claim 5, characterized in that, The distance (S1) between the retaining pin groove (324) and the left boundary line (325) is 1.3mm-1.6mm, and the distance between the retaining pin groove (324) and the right boundary line (S2) is 2.8mm-3.1mm.

7. The surgical suture device according to claim 2, characterized in that, The anvil portion (32) includes a support member, which includes a support body installed inside the anvil portion (32) and an exposed cap portion (322). The cap portion (322) is located entirely on one side of the anvil plate (321) in a second direction, and the width of the joint between the cap portion (322) and the anvil plate (321) is the same as the width of the anvil plate.

8. The surgical suture device according to claim 7, characterized in that, The cap (322) has a width that tapers away from the anvil (321), and the size of the cap (322) in the first direction (D1) also tapers away from the anvil.

9. The surgical suture device according to claim 7 or 8, characterized in that, The support is made of plastic, and the cutting board (321) is made of stainless steel.

10. The surgical suture device according to claim 1, characterized in that, The surgical stapler includes a shaft assembly (24) extending distally from the handle assembly, the distal end of which forms a support portion (31) for mounting the staple cartridge. The surgical stapler includes a first side workpiece and a second side workpiece clamped together in a third direction (D3). The first side workpiece is located on the same side of the retaining pin groove relative to the centerline. A connecting segment (33) is provided between the anvil portion (32) and the support portion (31). The first side workpiece forms an integral first side surface (327) of the anvil portion (32), the connecting segment (33), and the support portion (31), wherein the integral first side surface (327) is planar, and the first direction, the second direction, and the third direction are orthogonal.

11. The surgical suture device according to claim 10, characterized in that, The second side workpiece forms an integral second side surface (328) of the anvil portion (32), the connecting section (33) and the support portion (31), and the second side surface (328) has a step.

12. The surgical suture device according to claim 1, characterized in that, The anvil portion (32) has a uniform width at all points in the second direction (D2).

13. The surgical suture device according to claim 1, characterized in that, A trigger (22) for operably firing the surgical nail is disposed on the shank assembly (20), and a retaining pin operating component for operably firing the retaining pin is disposed on the end actuator (30).

14. The surgical suture device according to claim 1, characterized in that, The retaining pin groove (324) is surrounded by a chamfered feature structure (3241) for guiding the retaining pin into the retaining pin groove (324).

15. The surgical suture device according to claim 14, characterized in that, The chamfered feature structure (3241) includes a continuous annular portion surrounding the retaining pin groove.

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