CN111297424A - Staple formers and surgical staplers - Google Patents

Abstract

A suturing nail forming piece comprises a body extending along the longitudinal direction, wherein the body is provided with a forming surface, a plurality of forming parts are formed by respectively sinking downwards from the forming surface, and each forming part comprises a forming groove; the molding groove comprises a first molding groove, and the first molding groove comprises a first side wall and a second side wall; the lateral distance between at least a portion of the first sidewall and at least a portion of the second sidewall gradually decreases in a downward direction. The suturing nail is guided by the first side wall and the second side wall, so that the suturing nail can conveniently enter the first forming groove along the downward direction, and the forming effect is improved.

Description

Staple formers and surgical staplers

technical field

The invention relates to a surgical operation device, in particular to a staple forming part and a surgical stapler, belonging to the field of medical instruments.

Background technique

Various surgical staplers and endoscopic surgical staplers are used to replace needles and threads for free-hand suture operations in surgical operations. They are widely used to suture human digestive tract organs, respiratory organs and urogenital organs in surgical operations, which can reduce operation time and improve. surgical quality.

The components of the stapling mechanism of the surgical stapler include: a staple cartridge assembly and a staple anvil assembly. The staple cartridge assembly includes a staple cartridge, a staple cartridge holder for accommodating the staple cartridge, a staple pushing block installed in the staple cartridge, suture staples and a cutting knife, wherein the cutting knife can be installed according to use requirements. The staple anvil assembly includes a staple anvil, a staple anvil holder for accommodating the staple anvil, and the staple forming grooves are arranged on the end surface of the staple anvil and correspond to the staple positions in the staple cartridge. When the surgical stapler is used, the closing mechanism is operated to achieve a desired clamping thickness between the staple anvil and the staple cartridge, so as to clamp the tissue to be stapled between the staple anvil and the staple cartridge. After the sutured tissue is clamped, the firing mechanism can be operated to push out the staples in the staple cartridge, so as to achieve the surgical purpose of sutured tissue. For operations that also need to cut the tissue to be sutured, either the firing mechanism can be operated to push out the staples in the staple cartridge and the cutting knife can be pushed out to cut the clamped tissue to be sutured, or the tissue to be sutured can be cut with a scalpel. After the stapling operation is complete, the closure mechanism is operated to release the stapled tissue so that the surgical stapler can be withdrawn. The function of the suturing mechanism of the surgical stapler during the use of the surgical stapler is to clamp the tissue to be sutured between the staple anvil and the staple cartridge, and then push the staples out of the staple cartridge to penetrate the clamped staple to be stapled. The tissue directly touches the staple forming groove on the staple anvil, so that the U-shaped staple is bent into a B-shape to achieve the surgical purpose of suturing the tissue.

FIG. 1 is a schematic structural diagram of a conventional nail anvil. As shown in FIG. 1 , the nail anvil 10 has a main body 11 , the main body 11 has a forming surface 12 , and a plurality of forming parts 13 are disposed on the forming surface 12 , each forming part 13 includes two forming concave parts 14 , and one of the two forming concave parts 14 is A spacer 15 is provided therebetween, and the spacer 15 makes the two forming recesses 14 independent of each other. The forming recess 14 has an opening 141 with a uniform width W1, and W1 is about 0.9 mm; wherein the staples (not shown) enter the forming recess 14 from the opening 141 and are bent and formed. However, the diameter of the staple legs of the existing staple is 0.2 mm. Due to the obvious difference in size between the two, the staple is easily shaken and poorly formed when it is bent and formed in the forming recess 14 .

In view of this, the present invention proposes a new staple forming part (or so-called staple anvil) to improve the problem of poor forming of staples in the forming recess.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention aims to provide a new staple forming part and its surgical stapler. The problem of poor molding caused by shaking during bending in the groove. The present invention is achieved through the following technical solutions:

A staple forming part, comprising a body extending in a longitudinal direction, the body having a forming surface, a plurality of forming parts being respectively formed by being recessed downward from the forming surface, and each forming part including a forming groove; The forming groove includes a first forming groove, and the first forming groove includes a first side wall and a second side wall; a gap between at least a part of the first side wall and at least a part of the second side wall The lateral distance gradually decreases in the downward direction.

Further, each forming portion includes a spacer portion and two of the forming grooves, and the spacer portion is located between the two forming grooves.

Further, each of the forming grooves further includes a second forming groove, the second forming groove and the first forming groove communicate with each other, and the second forming groove is disposed between the first forming groove and the first forming groove. wherein the second forming groove includes a third side wall and a fourth side wall.

Further, the lateral distance between at least a portion of the third side wall and at least a portion of the fourth side wall is less than or equal to a distance between at least a portion of the first side wall and at least a portion of the second side wall. The minimum value of the horizontal distance between them.

Further, a lateral distance between at least a portion of the first side wall and at least a portion of the second side wall is less than or equal to 0.9 mm and greater than or equal to 0.2 mm.

Further, a lateral distance between at least a portion of the third side wall and at least a portion of the fourth side wall is the same in a direction toward the spacer.

Further, a lateral distance between at least a portion of the third side wall and at least a portion of the fourth side wall is greater than or equal to 0.2 mm.

Further, in the longitudinal direction, the first forming groove has a first length, the second forming groove has a second length, and the second length is greater than or equal to the first length.

Further, the two forming grooves are mirror-symmetrical with the spacer as the center.

Further, both the first forming groove and the second forming groove have a bottom wall, the bottom wall of the first forming groove extends obliquely downward in a direction toward the spacer, and the second forming groove has a bottom wall. The bottom wall extends obliquely downward in a direction away from the spacer, and the bottom wall of the first forming groove and the bottom wall of the second forming groove are mutually in the first forming groove and the second forming groove. Connections are smoothly connected.

Further, the body includes two side portions and a groove located between the two side portions, the molding surface of the side portion includes a first surface and a second surface, and the first surface is opposite to the other side. The second surface is closer to the groove, and the first surface protrudes from the second surface.

The present invention also provides a surgical stapler comprising a staple forming member and a staple cartridge, the staple cartridge housing staples, the staple forming member bending the staples pushed out of the staple cartridge into shape, the staple cartridge The staple former is a staple former as described in any of the above.

Compared with the prior art, the first forming groove of the staple forming part of the present invention includes a first side wall and a second side wall; the lateral distance between at least a portion of the first side wall and at least a portion of the second side wall The tapering in the downward direction facilitates guiding the staples from outside the forming groove into the first forming groove in the downward direction.

Description of drawings

Fig. 1 is the structural representation of the existing nail anvil;

Figure 2 is a schematic structural diagram of a staple forming part according to the present invention;

Fig. 3 is an enlarged view of the circled portion in Fig. 2;

FIG. 4 is a schematic structural diagram of the staple forming part in FIG. 2 from another perspective;

FIG. 5 is an enlarged view of the circled portion in FIG. 4 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the description of the present invention, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. "Several" means at least one.

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

As shown in FIG. 2 to FIG. 5 , the staple forming part 20 provided by the present invention includes a main body 21 extending in the longitudinal direction, the main body 21 has a forming surface 22 , and a plurality of forming parts 23 are respectively formed by concave 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 molding surface 22 of the side portion 211 includes a first surface 221 and a second surface 222 , and the first surface 221 is more than the second surface 222 . Adjacent to the groove 212 , the first surface 221 protrudes from the second surface 222 . The staple forming part 20 is used for mating with a staple cartridge (not shown), the staple cartridge is provided with a knife slot, the knife slot is used for the cutting knife to travel inside, and the groove 212 of the staple forming part 20 is used for receiving the cutting knife The top of the cutting knife travels within the groove 212 of the staple former 20 as the cutting knife travels within the knife slot. Before suturing and cutting, the tissue needs to be clamped and pressed to drain the tissue fluid of the tissue to be sutured; the first surface 221 protrudes from the second surface 222, so that the distance between the first surface 221 and the staple cartridge is smaller than the second surface The distance between 222 and the staple cartridge, the squeezing force at the first surface 221 is greater than the squeezing force at the second surface 222, thereby forming a fluid gradient from the first surface 221 to the second surface 222, promoting tissue fluid in the tissue from the first surface. One surface 221 is discharged to the second surface 222 and from the second surface 222 to the unpressed tissue. The plurality of molding parts 23 are arranged in a row in the longitudinal direction. The plurality of molding parts 23 are arranged in several rows along the lateral direction perpendicular to the longitudinal direction. The staple former 20 mates with the staple cartridge. The number of formed portions 23 of the staple former 20 is greater than or equal to the number of staples contained in the staple cartridge. When the staple forming part 20 is suitable for staple cartridges of various specifications, the number of staples accommodated in the staple cartridges of different specifications is different, and the number of the forming parts 23 of the staple forming part 20 is greater than or equal to the staple cartridge of any specification The number of staples accommodated in the .

Each molding portion 23 has a spacer portion 28 and two molding grooves 231 . The spacer 28 is located between the two forming grooves 231 , and the spacer 28 makes the two forming grooves 231 disconnected from each other, that is, the two forming grooves 231 are independent of each other, and the two forming grooves 231 are centered on the spacer 28 Mirror symmetry.

The forming groove 231 , the first forming groove 24 and the second forming groove 25 include opposite first ends and second ends, 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 an opposite bottom surface, and the downward direction is defined as a 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 lateral direction, and the lateral distance is defined as the distance between the two parts of the body 21 along the lateral direction.

The forming groove 231 includes a first forming groove 24 and a second forming groove 25 that communicate with each other, one end of the second forming groove 25 is connected to the spacer 28, and the opposite end of the second forming groove 25 is connected to the first forming groove 24, that is, The second molding groove 25 is disposed between the spacer portion 28 and the first molding groove 24 . The first forming groove 24 includes a first guide portion that guides the staples from the outside of the forming groove 231 into the first forming groove 24 . The first molding groove 24 includes opposing first side walls 243 and second side walls 244 . The lateral distance between at least a portion of the first side wall 243 and at least a portion of the second side wall 244 is equal in the direction toward the spacer 28 . The lateral distance between at least a portion of the first side wall 243 and at least a portion of the second side wall 244 gradually decreases along the downward direction, that is, the first side wall 243 forms a first guide surface along the downward direction, and the second side wall 243 forms a first guide surface along the downward direction. The wall 244 forms a second guide surface in the downward direction, whereby the first guide surface and the second guide surface form a first guide portion that guides the staples in the downward direction into the first forming slot 24 . The second molding groove 25 includes opposing third side walls 253 and fourth side walls 254 , and the lateral distance between at least a portion of the third side wall 253 and at least a portion of the fourth side wall 254 is equal in the direction toward the spacer 28 , or gradually decrease. In the present embodiment, the lateral distance between at least a portion of the third side wall 253 and at least a portion of the fourth side wall 254 gradually decreases in the direction toward the spacer portion 28 . At the junction of the first molding groove 24 and the second molding groove 25 , the lateral distance between the third side wall 253 and the fourth side wall 254 is equal to the lateral distance between the first side wall 243 and the second side wall 244 . The first side wall 243 and the third side wall 253 are provided with a smooth transition at the junction of the first molding groove 24 and the second molding groove 25 , and the second side wall 244 and the fourth side wall 254 are formed between the first molding groove 24 and the second molding groove 25 . The junction of the two forming grooves 25 is also set as a smooth transition, so as to facilitate the staples entering the second forming groove 25 from the first forming groove 24 . Therefore, the lateral distance between the third edge 251 and the fourth edge 252 of the second molding groove 25 close to the first molding groove 24 is greater than the distance between the third edge 251 and the fourth edge 252 of the second molding groove 25 away from the first molding groove 24 the horizontal distance between them. The staples are guided by the first guide portion to first enter the first forming groove 24 , and then enter the second forming groove 25 in the direction toward the spacing portion 28 , so as to be formed in the forming groove 231 . The first molding groove 24 has a first opening, and the first opening has an opposite first edge 241 and a second edge 242, wherein the first edge 241 is the upper edge of the first side wall 243, and the second edge 242 is the first edge 241. The upper edges of the two side walls 244 . The second molding groove 25 has a second opening portion, and the second opening portion has a third edge 251 and a fourth edge 252 opposite to each other, wherein the third edge 251 is the upper edge of the third side wall 253 , and the fourth edge 252 is the first edge The upper edges of the four side walls 254 . Wherein, there is a first distance W2 in the transverse direction between the first edge 241 and the second edge 242, and a second distance W3 in the transverse direction between the third edge 251 and the fourth edge 252. Preferably, the second distance W3 is smaller than or is equal to the first spacing W2, wherein 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 of the first opening. width. FIG. 5 shows the minimum value of the second spacing W3. Wherein, the first spacing W2 is less than or equal to 0.9 mm, and the first spacing W2 is greater than 0.2 mm; the second spacing W3 is less than or equal to 0.9 mm, and the second spacing W3 is greater than or equal to 0.2 mm. In other words, the first width is less than or equal to 0.9 mm, and the first width is greater than 0.2 mm; in other words, the second width is less than or equal to 0.9 mm, and the second width is greater than or equal to 0.2 mm. The first forming groove 24 has a first bottom wall 245 , the second forming groove 25 has a second bottom wall 255 , the first bottom wall 245 and the second bottom wall 255 are each a guide surface extending downward obliquely. The lead is a curved surface. The first bottom wall 245 is adjacent to the forming surface 22 at its first end, and the first bottom wall 245 extends obliquely downward from its first end toward the second end, The direction slopes downward. The second bottom wall 255 is adjacent to the top surface of the spacer 28 at the second end thereof, and the second bottom wall 255 extends obliquely downward from the second end toward the first end, that is, the second bottom wall 255 moves away from the spacer along the The direction of 28 extends obliquely downward. The first bottom wall 245 and the second bottom wall 255 are smoothly connected where the first forming groove 24 and the second forming groove 25 communicate with each other. "At least a part" in the present invention includes a part and the whole.

It can be seen from the above that 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, and the staples (not shown) When entering the forming groove 231 , the ends of the staple legs of the staple can enter the first forming groove 24 from the first opening with the larger first width. The first forming groove 24 is a guide groove, which is larger The width of the first opening is conducive to the entry of the ends of the staple legs of the staples; during the process of bending the staples, the second opening with the smaller second width reduces the size of the staples The freedom of movement in the second forming groove 25 when the staple legs are bent and formed can effectively avoid the problem of abnormal forming of the staples caused by their own shaking. Therefore, the staple forming part 20 provided by the present invention can not only allow the staples to easily enter the forming grooves 231, but also prevent the staples from being trapped in the larger forming recesses 14 (as shown in FIG. 1 ) during the forming process of the staples. ) shaking (or the staple displacement is too large) caused by abnormal molding.

In order to obtain a better forming effect, in the longitudinal extension direction of the staple forming part 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 h1. length h2, wherein the second length h2 is greater than or equal to the first length h1. The first forming grooves 24 allow preliminary bending and forming of the staple legs of the staple, and the second forming grooves 25 allow the staple legs to be fully bent and formed. Therefore, the longer length of the second forming groove 25 has a more sufficient forming area, which can make the nail legs have a better forming effect.

The present invention also provides a surgical stapler, comprising a staple forming member and a staple cartridge, the staple cartridge accommodates the staples, and the staple forming member bends the staples pushed out from the staple cartridge, so that the staple forming member cooperates with the staple cartridge For stapling tissue, the staple former is the staple former as described above.

To sum up, the staple forming part of the present invention has a forming part 23, the forming part 23 includes two forming grooves 231 and a spacer 28 located between the two forming grooves 231, and the forming grooves 231 include first The forming groove 24 and the second forming groove 25. The second forming groove 25 is disposed between the spacer 28 and the first forming groove 24. The first forming groove 24 has a first side wall 243 and a second side wall 244. The lateral distance between at least a portion of the wall 243 and at least a portion of the second side wall 244 gradually decreases in the downward direction, and the first side wall 243 and the second side wall 244 cooperate to guide the staples from the forming grooves 231 The outside enters the first molding groove 24 in the downward direction.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Changes, modifications, replacements and modifications are made to the embodiments, and the technical solutions after the above-mentioned changes, modifications, replacements and modifications are all within the protection scope of the present invention.

Claims (12)

1. A staple forming part, comprising a body extending in a longitudinal direction, the body having a forming surface, and a plurality of forming portions are respectively formed by concave downward from the forming surface, characterized in that: Each molding part includes a molding groove; the molding groove includes a first molding groove, and the first molding groove includes a first side wall and a second side wall; at least a part of the first side wall is connected to the The lateral distance between at least a portion of the second side walls gradually decreases in the downward direction. 2. The staple forming piece of claim 1, wherein each forming portion includes a spacer portion and two of the forming grooves, the spacer portion being located between the two forming grooves. 3. The staple forming part of claim 2, wherein each forming groove further comprises a second forming groove, the second forming groove and the first forming groove are communicated with each other, and each forming groove further comprises a second forming groove. The second forming groove is arranged between the first forming groove and the spacer; wherein, the second forming groove includes a third side wall and a fourth side wall. 4. The staple former of claim 3, wherein a 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 first side The minimum value of the lateral distance between at least a portion of the wall and at least a portion of the second side wall. 5. The staple former of claim 1, wherein 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 millimeters and greater than or equal to 0.2 mm. 6. The staple forming piece of any one of claims 3 and 4, wherein the lateral distance between at least a portion of the third side wall and at least a portion of the fourth side wall is along the direction toward the The directions of the spacers are the same. 7. The staple former of any one of claims 3 and 4, wherein the lateral distance between at least a portion of the third side wall and at least a portion of the fourth side wall is greater than or equal to 0.2 mm. 8 . The staple forming part of claim 3 , wherein, in the longitudinal direction, the first forming groove has a first length, and the second forming groove has a first length. 9 . Two lengths, the second length is greater than or equal to the first length. 9 . The staple forming part of claim 2 , wherein the two forming grooves are mirror-symmetrical with the spacer as the center. 10 . 10 . The staple forming part according to claim 3 , wherein the first forming groove and the second forming groove both have bottom walls, and the bottom wall of the first forming groove has a bottom wall. 11 . The bottom wall of the second molding groove extends obliquely downward in the direction toward the spacer, and the bottom wall of the first molding groove and the second molding groove are inclined downward in the direction away from the spacer. The bottom wall of the forming groove is smoothly connected at the point where the first forming groove and the second forming groove communicate with each other. 11. The staple forming member of claim 1, wherein the body includes two sides and a groove between the two sides, the forming surfaces of the sides comprising A first surface and a second surface, the first surface is closer to the groove than the second surface, and the first surface protrudes from the second surface. 12. A surgical stapler comprising a staple forming member and a staple cartridge, the staple cartridge housing staples, the staple forming member flexing the staples pushed out of the staple cartridge, characterized in that: The staple former is the staple former of any one of claims 1-11.

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