Suture staples and surgical staplers

Abstract

A suture staple molding component includes a body extending longitudinally, the body having a molding surface, and a plurality of molding portions formed by recessing downward from the molding surface, each molding portion including a molding groove; the molding groove includes a first molding channel, the first molding channel including a first sidewall and a second sidewall; the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall gradually decreases in the downward direction. This invention guides the suture staple through the first and second sidewalls, facilitating the suture staple to enter the first molding channel in the downward direction, thereby improving the molding effect.

Description

Technical Field

[0001] This invention relates to a surgical device, and more particularly to a suture stapler and a surgical stapler, belonging to the field of medical devices. Background Technology

[0002] Various surgical staplers and laparoscopic surgical staplers are used to replace manual suturing with needles and sutures in surgical procedures. They are being widely used in surgery to suture human digestive, respiratory, and urogenital organs, which can reduce operation time and improve surgical quality.

[0003] The suturing mechanism of a surgical stapler consists of a staple cartridge assembly and an anvil assembly. The staple cartridge assembly includes a staple cartridge, a staple cartridge holder for housing the cartridge, a staple pusher block installed within the cartridge, staples, and a cutting blade, the latter being optional. The anvil assembly includes an anvil, an anvil holder for housing the anvil, and staple forming grooves arranged on the end face of the anvil corresponding to the positions of the staples within the cartridge. When using the surgical stapler, the closing mechanism is operated to achieve the desired clamping thickness between the anvil and the cartridge, clamping the tissue to be sutured between them. Once the tissue is clamped, the firing mechanism is operated to eject the staples from the cartridge, achieving the surgical purpose of suturing the tissue. For surgeries requiring further cutting of the sutured tissue, the cutting blade can be simultaneously ejected by operating the firing mechanism to cut the clamped tissue, or the tissue can be cut with a scalpel. After suturing is complete, the closing mechanism is operated to release the sutured tissue, allowing the surgical stapler to be withdrawn. The suturing mechanism of a surgical stapler plays a crucial role in its use by clamping the tissue to be sutured between the anvil and the staple cartridge, then pushing the staples out of the cartridge, penetrating the clamped tissue, and reaching the staple forming groove on the anvil, causing the U-shaped staples to bend into a B-shape, thus achieving the surgical purpose of suturing the tissue.

[0004] Figure 1 This is a schematic diagram of an existing anvil. (For example...) Figure 1 As shown, the anvil 10 has a body 11 with a forming surface 12. Multiple forming portions 13 are disposed on the forming surface 12. Each forming portion 13 includes two forming recesses 14, with a spacer 15 between the two forming recesses 14, making the two forming recesses 14 independent of each other. Each forming recess 14 has an opening 141 with a uniform width W1 of approximately 0.9 mm. A suture staple (not shown) enters the forming recess 14 through the opening 141 and is bent into shape. However, the existing suture staples have a leg diameter of 0.2 mm. Due to the significant size difference, the suture staple is prone to wobbling and poor shaping when bent into the forming recess 14.

[0005] In view of this, the present invention proposes a new suture pin forming part (or pin anvil) to improve the problem of poor forming of suture pins in the forming recess. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention aims to provide a novel suture staple forming component and its surgical stapler. By designing the forming portion of the suture staple forming component to be larger at both ends and smaller in the middle, the problem of poor forming caused by wobbling during the bending and forming of the suture staple in the forming groove is solved. This invention is achieved through the following technical solution:

[0007] A suture staple molding includes a body extending longitudinally, the body having a molding surface, and a plurality of molding portions formed by recessing downward from the molding surface, each molding portion including a molding groove; the molding groove includes a first molding channel, the first molding channel including a first sidewall and a second sidewall; the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall gradually decreases in the downward direction.

[0008] Furthermore, each molding portion includes a spacer and two molding grooves, the spacer being located between the two molding grooves.

[0009] Furthermore, each of the molding grooves further includes a second molding groove, which is interconnected with the first molding groove and is disposed between the first molding groove and the spacer portion; wherein, the second molding groove includes a third sidewall and a fourth sidewall.

[0010] Furthermore, the lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is less than or equal to the minimum lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall.

[0011] Furthermore, the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall is less than or equal to 0.9 mm and greater than or equal to 0.2 mm.

[0012] Furthermore, the lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is equal in the direction toward the spacer.

[0013] Furthermore, the lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is greater than or equal to 0.2 mm.

[0014] Furthermore, in the longitudinal direction, the first forming groove has a first length, and the second forming groove has a second length, wherein the second length is greater than or equal to the first length.

[0015] Furthermore, the two molded grooves are mirror-symmetrical about the spacer portion.

[0016] Furthermore, both the first molding groove and the second molding groove have bottom walls. The bottom wall of the first molding groove extends downward at an angle toward the spacer, and the bottom wall of the second molding groove extends downward at an angle away from the spacer. The bottom walls of the first molding groove and the second molding groove are smoothly connected at the point where the first molding groove and the second molding groove communicate with each other.

[0017] Furthermore, the body includes two sides and a groove located between the two sides. The shaped surface of the side includes a first surface and a second surface. The first surface is closer to the groove than the second surface and protrudes from the second surface.

[0018] The present invention also provides a surgical stapler, including a staple forming member and a staple cartridge, the staple cartridge receiving staples, the staple forming member causing the staples ejected from the staple cartridge to bend into shape, the staple forming member being any of the staple forming members described above.

[0019] Compared with the prior art, the first forming groove of the suture pin forming part of the present invention includes a first sidewall and a second sidewall; the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall gradually decreases in the downward direction, which is conducive to guiding the suture pin from the outside of the forming groove downward into the first forming groove. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the existing anvil structure;

[0021] Figure 2 This is a schematic diagram of the structure of the suture pin molding part according to the present invention;

[0022] Figure 3 yes Figure 2 Enlarged view of the circled area;

[0023] Figure 4 yes Figure 2 A schematic diagram of the stitching staple molding component from another perspective;

[0024] Figure 5 yes Figure 4 Enlarged view of the circled area. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. In the description of the present invention, 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 at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. "Several" means at least one.

[0026] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0027] like Figures 2 to 5 As shown, the suture staple forming component 20 provided by the present invention includes a body 21 extending along the longitudinal direction. The body 21 has a forming surface 22, and a plurality of forming portions 23 are respectively formed by recessing downward from the forming surface 22. The body 21 includes two side portions 211 and a groove 212 located between the two side portions 211. The forming surface 22 of the side portions 211 includes a first surface 221 and a second surface 222. The first surface 221 is closer to the groove 212 than the second surface 222, and the first surface 221 protrudes from the second surface 222. The suture staple forming component 20 is used to cooperate with a staple cartridge (not shown). The staple cartridge is provided with a blade slot for a cutting blade to travel within. The groove 212 of the suture staple forming component 20 is used to receive the top of the cutting blade. When the cutting blade travels within the blade slot, the top of the cutting blade travels within the groove 212 of the suture staple forming component 20. Before suturing and cutting, the tissue needs to be clamped and squeezed to drain the tissue fluid from the tissue to be sutured. The first surface 221 protrudes from the second surface 222, so the distance between the first surface 221 and the staple cartridge is less than the distance between the second surface 222 and the staple cartridge. The squeezing force at the first surface 221 is greater than the squeezing force at the second surface 222, thus forming a fluid gradient from the first surface 221 towards the second surface 222. This causes the tissue fluid to drain from the first surface 221 to the second surface 222 within the tissue and from the second surface 222 to the unsqueezed tissue. Multiple forming parts 23 are arranged in a row along the longitudinal direction. Multiple forming parts 23 are arranged in several rows along a transverse direction perpendicular to the longitudinal direction. The staple forming component 20 cooperates with the staple cartridge. The number of forming parts 23 in the staple forming component 20 is greater than or equal to the number of staples contained in the staple cartridge. When the staple forming part 20 is applicable to staple cartridges of various sizes, the number of staples contained in different sizes of staple cartridges is different, and the number of forming parts 23 of the staple forming part 20 is greater than or equal to the number of staples contained in any size of staple cartridge.

[0028] Each molding part 23 has a spacer 28 and two molding grooves 231. The spacer 28 is located between the two molding grooves 231, and the spacer 28 makes the two molding grooves 231 not connected to each other, that is, the two molding grooves 231 are independent of each other, and the two molding grooves 231 are mirror symmetrical about the spacer 28.

[0029] The molding groove 231, the first molding groove 24, and the second molding groove 25 each have a first end and a second end opposite to each other. The first end is defined as the end away from the spacer 28, and the second end is defined as the end close to the spacer 28. The body 21 has a molding surface 22 and a bottom surface opposite to it. The downward direction is defined as the direction from the molding surface 22 toward the bottom surface. The body 21 extends along the longitudinal direction. The direction perpendicular to the longitudinal direction is defined as the transverse direction, and the transverse distance is defined as the transverse distance between the two parts of the body 21.

[0030] The molding groove 231 includes a first molding groove 24 and a second molding groove 25 that are interconnected. One end of the second molding groove 25 is connected to the spacer 28, and the other end of the second molding groove 25 is connected to the first molding groove 24. That is, the second molding groove 25 is disposed between the spacer 28 and the first molding groove 24. The first molding groove 24 includes a first guide portion that guides the stitching pin from the outside of the molding groove 231 into the first molding groove 24. The first molding groove 24 includes opposing first sidewalls 243 and second sidewalls 244. The lateral distance between at least a portion of the first sidewall 243 and at least a portion of the second sidewall 244 is equal in the direction toward the spacer 28. The lateral distance between at least a portion of the first sidewall 243 and at least a portion of the second sidewall 244 gradually decreases in the downward direction. That is, the first sidewall 243 forms a first guide surface in the downward direction, and the second sidewall 244 forms a second guide surface in the downward direction. Thus, the first guide surface and the second guide surface form a first guide portion, which guides the stitching pin into the first molding groove 24 in the downward direction. The second molding groove 25 includes opposing third sidewalls 253 and fourth sidewalls 254. The lateral distance between at least a portion of the third sidewall 253 and at least a portion of the fourth sidewall 254 is equal to or gradually decreases in the direction toward the spacer 28. In this embodiment, the lateral distance between at least a portion of the third sidewall 253 and at least a portion of the fourth sidewall 254 gradually decreases in the direction toward the spacer 28. At the junction of the first molding groove 24 and the second molding groove 25, the lateral distance between the third sidewall 253 and the fourth sidewall 254 is equal to the lateral distance between the first sidewall 243 and the second sidewall 244. The first sidewall 243 and the third sidewall 253 are configured to have a smooth transition at the junction of the first molding groove 24 and the second molding groove 25, and the second sidewall 244 and the fourth sidewall 254 are also configured to have a smooth transition at the junction of the first molding groove 24 and the second molding groove 25, so as to facilitate the entry of the suture staple from the first molding groove 24 into the second molding groove 25. Therefore, the lateral distance between the third edge 251 and the fourth edge 252 of the second forming groove 25 near the first forming groove 24 is greater than the lateral distance between the third edge 251 and the fourth edge 252 of the second forming groove 25 away from the first forming groove 24. The stitching staple is guided by the first guide portion into the first forming groove 24, and then enters the second forming groove 25 in the direction toward the spacer portion 28, thereby forming within the forming groove 231. The first forming groove 24 has a first opening with opposing first edges 241 and second edges 242, wherein the first edge 241 is the upper edge of the first sidewall 243, and the second edge 242 is the upper edge of the second sidewall 244. The second forming groove 25 has a second opening with opposing third edges 251 and fourth edges 252, wherein the third edge 251 is the upper edge of the third sidewall 253, and the fourth edge 252 is the upper edge of the fourth sidewall 254.Wherein, there is a first spacing W2 between the first edge 241 and the second edge 242 in the lateral direction, and there is a second spacing W3 between the third edge 251 and the fourth edge 252 in the lateral direction. Preferably, the second spacing W3 is less than or equal to the first spacing W2. The first spacing W2 can be regarded as the first width of the first opening, and the second spacing W3 can be regarded as the second width of the second opening, that is, the second width is less than or equal to the first width. Figure 5 The minimum value of the second spacing W3 is shown. The first spacing W2 is less than or equal to 0.9 mm and greater than 0.2 mm; the second spacing W3 is less than or equal to 0.9 mm and greater than or equal to 0.2 mm. In other words, the first width is less than or equal to 0.9 mm and greater than 0.2 mm; in other words, the second width is less than or equal to 0.9 mm and greater than or equal to 0.2 mm. The first forming groove 24 has a first bottom wall 245, and the second forming groove 25 has a second bottom wall 255. Both the first bottom wall 245 and the second bottom wall 255 are inclined downward extending guide surfaces, and the guide surfaces are curved. The first bottom wall 245 is adjacent to the forming surface 22 at its first end, and the first bottom wall 245 extends inclined downward from its first end toward its second end, that is, the first bottom wall 245 extends inclined downward in the direction toward the spacer 28. The second bottom wall 255 is adjacent to the top surface of the spacer 28 at its second end. The second bottom wall 255 extends downward at an angle from its second end toward the first end, that is, the second bottom wall 255 extends downward at an angle toward the spacer 28. The first bottom wall 245 and the second bottom wall 255 are smoothly connected at the junction of the first molding groove 24 and the second molding groove 25. In this invention, "at least a portion" includes both a portion and all of the material.

[0031] As described above, the first width of the first opening of the first forming groove 24 in the forming groove 231 of the present invention is greater than the second width of the second opening of the second forming groove 25. When the suture pin (not shown) enters the forming groove 231, the pin leg end can enter the first forming groove 24 through the first opening with a larger first width. The first forming groove 24 is a guide groove, and its larger first opening facilitates the entry of the pin leg end. During the bending forming process of the suture pin, the limiting effect of the second opening with a smaller second width reduces the degree of freedom of movement of the pin leg in the second forming groove 25 during bending forming, thereby effectively avoiding forming abnormalities caused by the suture pin's own shaking. Therefore, the suture pin forming part 20 provided by the present invention can make it easy for the suture pin to enter the forming groove 231, and at the same time prevent the suture pin from being damaged in the larger forming recess 14 (e.g., during the forming process). Figure 1 (As shown) Shaking (or excessive displacement of the stitching pins) causes molding abnormalities.

[0032] To achieve better forming results, in the longitudinal extension direction of the stitching pin 20, the first opening of the first forming groove 24 has a first length h1, and the second opening of the second forming groove 25 has a second length h2, wherein the second length h2 is greater than or equal to the first length h1. The first forming groove 24 causes the pin leg to bend and form initially, while the second forming groove 25 causes the pin leg to bend and form fully. Therefore, the longer second forming groove 25 has a more complete forming area, which allows the pin leg to have a better forming effect.

[0033] The present invention also provides a surgical stapler, including a staple forming element and a staple cartridge, the staple cartridge containing staples, the staple forming element causing the staples pushed out from the staple cartridge to bend into shape, thereby the staple forming element cooperating with the staple cartridge to suture tissue, said staple forming element being the staple forming element described above.

[0034] In summary, the suture pin molding part of the present invention has a molding part 23, which includes two molding grooves 231 and a spacer 28 located between the two molding grooves 231. The molding grooves 231 include a first molding groove 24 and a second molding groove 25 that are interconnected. The second molding groove 25 is disposed between the spacer 28 and the first molding groove 24. The first molding groove 24 has a first sidewall 243 and a second sidewall 244. The lateral distance between at least a portion of the first sidewall 243 and at least a portion of the second sidewall 244 gradually decreases in the downward direction. The first sidewall 243 and the second sidewall 244 cooperate to guide the suture pin from the outside of the molding groove 231 into the first molding groove 24 in the downward direction.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, and the technical solutions after the above changes, modifications, substitutions and variations are all within the protection scope of the present invention.

Claims

1. A suture staple molding comprising a body extending along a longitudinal direction, the body having a molding surface, and a plurality of molding portions respectively recessed downward from the molding surface, characterized in that: Each molding part includes a molding groove; the molding groove includes a first molding groove, the first molding groove includes opposing first sidewalls and second sidewalls; the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall gradually decreases in the downward direction, that is, the first sidewall forms a first guide surface in the downward direction, and the second sidewall forms a second guide surface in the downward direction. The lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall is equal along the longitudinal direction.

2. The stitching staple molded part as described in claim 1, characterized in that, Each molding portion includes a spacer and two molding grooves, the spacer being located between the two molding grooves.

3. The stitching staple molded part as described in claim 2, characterized in that, Each of the molding grooves further includes a second molding groove, which is in communication with the first molding groove and is disposed between the first molding groove and the spacer portion; wherein the second molding groove includes a third sidewall and a fourth sidewall.

4. The stitching staple molded part as described in claim 3, characterized in that, The lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is less than or equal to the minimum lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall.

5. The stitching staple molded part as described in claim 1, characterized in that, The lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall is less than or equal to 0.9 mm and greater than or equal to 0.2 mm.

6. The suture pin molded part as described in any one of claims 3 and 4, characterized in that, The lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is equal in the direction toward the spacer.

7. The suture pin molded part as described in any one of claims 3 and 4, characterized in that, The lateral distance between at least a portion of the third sidewall and at least a portion of the fourth sidewall is greater than or equal to 0.2 mm.

8. The suture pin molded part as described in any one of claims 3 and 4, characterized in that, In the longitudinal direction, the first forming groove has a first length, and the second forming groove has a second length, the second length being greater than or equal to the first length.

9. The stitching staple molded part as described in claim 2, characterized in that, The two molded grooves are mirror-symmetrical about the spacer.

10. The stitching pin molded part according to any one of claims 3 and 4, characterized in that, Both the first molding groove and the second molding groove have bottom walls. The bottom wall of the first molding groove extends downward at an angle toward the spacer, and the bottom wall of the second molding groove extends downward at an angle away from the spacer. The bottom walls of the first molding groove and the second molding groove are smoothly connected at the point where the first molding groove and the second molding groove communicate with each other.

11. The stitching staple molded part as described in claim 1, characterized in that, The body includes two sides and a groove located between the two sides. The shaped surface of the side includes a first surface and a second surface. The first surface is closer to the groove than the second surface and protrudes from the second surface.

12. A surgical stapler comprising a staple forming element and a staple cartridge, the staple cartridge receiving staples, the staple forming element causing the staples ejected from the staple cartridge to bend into shape, characterized in that, The suture pin molding is the suture pin molding as described in any one of claims 1-11.

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