CN111297425A

CN111297425A - Suturing nail forming part, suturing mechanism and surgical anastomat

Info

Publication number: CN111297425A
Application number: CN201910084143.8A
Authority: CN
Inventors: 孙宝峰; 周小朋
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2018-12-12
Filing date: 2019-01-28
Publication date: 2020-06-19

Abstract

A suturing nail forming piece and a suturing mechanism with the same. The suturing nail forming part comprises a forming surface, a plurality of forming parts are formed by downwards sinking from the forming surface, each forming part comprises a first extending part, a second extending part, a forming space and a spacing part, the spacing part divides the forming space into two forming grooves, and each forming part is provided with a proximal end part and a distal end part which are opposite; the first extension part and the second extension part extend towards the molding space along two opposite directions; the first extension part is provided with a first protruding part and a second protruding part, the width of the first protruding part is gradually increased from the distal end part to the spacing part, and the width of the second protruding part is gradually increased from the proximal end part to the spacing part; the second extension portion has fourth and fifth protruding portions, and the width of the fourth protruding portion gradually increases from the distal end portion toward the spacer portion and the width of the fifth protruding portion gradually increases from the proximal end portion toward the spacer portion. The invention realizes the control of the bending forming process of the suturing nail by the first extension part and the second extension part, and overcomes the poor forming caused by the shaking of the suturing nail.

Description

Suturing nail forming part, suturing mechanism and surgical anastomat

Technical Field

The invention relates to a surgical operation device, in particular to a suturing nail forming part, a suturing mechanism and a surgical anastomat, and belongs to the field of medical instruments.

Background

Various surgical anastomats and endoscopic surgical anastomats are used for replacing the needle-thread freehand suture operation in the surgical operation, are widely used for suturing human digestive tract organs, respiratory tract organs and urogenital organs in the surgical operation, can reduce the operation time and improve the operation quality.

The components of the stapling mechanism of the surgical stapler include: a nail bin component and a nail anvil component. The nail bin assembly comprises a nail bin, a nail bin frame for containing the nail bin, a nail pushing block, a suturing nail and a cutting knife, wherein the nail pushing block, the suturing nail and the cutting knife are installed in the nail bin, and the cutting knife can be installed according to the use requirement. The nail anvil component comprises a nail anvil and a nail anvil frame for accommodating the nail anvil, and the suturing nail forming grooves are arranged on the end surface of the nail anvil and correspond to the suturing nail positions in the nail bin. In use of the surgical stapler, the closure mechanism is operated to achieve a desired clamping thickness between the anvil and the staple cartridge in order to clamp tissue to be stapled between the anvil and the staple cartridge. After the sutured tissue is clamped, the firing mechanism can be operated to push out the suturing nails in the nail bin, so that the purpose of suturing the tissue is achieved. For the operation needing to cut the sutured tissue, the cutting knife can be pushed out to cut the clamped tissue to be sutured while the firing mechanism is operated to push out the suturing nails in the nail bin, and the surgical knife can also be used for cutting the sutured tissue. Upon completion of the stapling operation, the closure mechanism is operated to release the stapled tissue for withdrawal of the surgical stapler. The suturing mechanism of the surgical stapler has the following functions in the using process of the surgical stapler: the tissue to be sutured is clamped between the nail anvil and the nail bin, and then the suturing nail is pushed out from the nail bin and penetrates through the clamped tissue to be sutured to directly abut against the suturing nail forming groove on the nail anvil, so that the U-shaped suturing nail is bent into a B shape, and the purpose of suturing the tissue is achieved.

FIG. 1 is a schematic view of a prior art anvil. As shown in fig. 1, the anvil 10 has a body 11, the body 11 has a forming surface 12, a plurality of forming portions 13 are disposed on the forming surface 12, each forming portion 13 includes two forming recesses 14, a spacing portion 15 is disposed between the two forming recesses 14, and the spacing portion 15 makes the two forming recesses 14 independent from each other. The molding recess 14 has an opening 141, the opening 141 having a uniform width W1, W1 being about 0.9 mm; the staples (not shown) are inserted into the forming recess 14 from the opening 141 and bent. However, the conventional staple has a leg diameter of 0.2 mm, and since the difference in size between the two is significant, the staple tends to shake and is not formed well when it is bent and formed in the forming dented portion 14.

In view of the above, the present invention provides a new staple forming member (or anvil) and a corresponding stapling mechanism to solve the problem of poor staple forming in the forming recess.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention provides a novel suturing nail forming member, a suturing mechanism and a surgical stapler, wherein the forming portion of the suturing nail forming member is set to have two large ends and a small middle, so as to solve the problem of poor forming caused by shaking during the bending forming of the suturing nail in the forming groove.

In order to achieve the purpose, the invention is realized by the following technical scheme: a staple former comprising a body extending in a lengthwise direction, the body having a profiled surface from which a plurality of profiled sections are respectively formed by downwardly recessing, each profiled section comprising a first extension, a second extension and a profiled space, the profiled section further comprising a divider dividing the profiled space into two profiled grooves, the profiled section having opposed proximal and distal end portions, the proximal end portion being located on one side of the divider and the distal end portion being located on the other side of the divider; the first extending part extends towards the forming space along a first direction, the second extending part extends towards the forming space along a second direction, and the first direction and the second direction are both transverse and opposite; wherein the first extension has a first protrusion and a second protrusion, the first protrusion gradually increasing in width from the distal end portion toward the spacer portion, and the second protrusion gradually increasing in width from the proximal end portion toward the spacer portion; the second extension portion has a fourth protruding portion and a fifth protruding portion, the fourth protruding portion gradually increasing in width from the distal end portion toward the spacer portion; the width of the fifth protruding portion gradually increases from the proximal end portion toward the spacing portion; a first opening is formed between the first protruding portion and the fourth protruding portion, and a second opening is formed between the second protruding portion and the fifth protruding portion.

Further, the first extension portion further comprises a third protrusion disposed between the first protrusion and the second protrusion, the third protrusion having a width equal to the maximum width of the first protrusion and a width equal to the maximum width of the second protrusion; the second extension further comprises a sixth tab disposed between the fourth tab and the fifth tab, the sixth tab having a width equal to a maximum width of the fourth tab and a width equal to a maximum width of the fifth tab; wherein a third opening is formed between the third protrusion and the sixth protrusion.

Further, the first extension portion and the second extension portion are respectively a trapezoidal bump.

Further, a spacing between the third protrusion and the sixth protrusion in the lateral direction is greater than or equal to 0.2 millimeters.

Further, a spacing between the first protrusion and the fourth protrusion is greater than or equal to 0.2 millimeters and a spacing between the first protrusion and the fourth protrusion is less than or equal to 0.9 millimeters in the lateral direction.

Further, a spacing between the second protrusion and the fifth protrusion is greater than or equal to 0.2 millimeters and a spacing between the second protrusion and the fifth protrusion is less than or equal to 0.9 millimeters in the lateral direction.

Further, a first extension portion formed by the first protruding portion and the second protruding portion is a triangular bump or an arc-shaped bump, and a second extension portion formed by the fourth protruding portion and the fifth protruding portion is a triangular bump or an arc-shaped bump.

Further, in the longitudinal extending direction of the body, the first protrusion and the fourth protrusion respectively have the same first length, the second protrusion and the fifth protrusion respectively have the same second length, and the third protrusion and the sixth protrusion respectively have the same third length, wherein the sum of the first length and the second length is less than or equal to the third length.

Further, the forming part also comprises a forming surface, and the forming surface is the bottom surface of the forming groove.

Further, the body comprises two side portions and a groove located between the two side portions, the molding surface of the side portion comprises a first surface and a second surface, the first surface is closer to the groove relative to the second surface, and the first surface protrudes out of the second surface.

The invention also provides a surgical stapler, which comprises a staple forming part and a staple box, wherein the staple box is used for accommodating staples, the staple forming part is used for bending and forming the staples pushed out from the staple box, and the staple forming part is the staple forming part as described in any item above.

In order to achieve the purpose, the invention is also realized by the following technical scheme: a suturing mechanism for a surgical stapler, comprising a nail bin and a suturing nail forming member, wherein the nail bin is used for accommodating a suturing nail, the suturing nail forming member enables the suturing nail pushed out from the nail bin to be bent and formed, the suturing nail forming member comprises a body extending along the longitudinal direction, the body is provided with a forming surface, a plurality of forming parts are formed by respectively sinking downwards from the forming surface, each forming part comprises a first extending part, a second extending part and a forming space, the forming parts further comprise a spacing part located in the forming space, the spacing part divides the forming space into two forming grooves, each forming part is provided with a near end part and a far end part which are opposite, the near end part is located on one side of the spacing part, and the far end part is located on the other side of the spacing part;

the first extending part extends towards the forming space along a first direction, the second extending part extends towards the forming space along a second direction, and the first direction and the second direction are both transverse and opposite;

wherein the first extension has a first protrusion and a second protrusion, the first protrusion gradually increasing in width from the distal end portion toward the spacer portion, and the second protrusion gradually increasing in width from the proximal end portion toward the spacer portion; the second extension portion has a fourth protruding portion and a fifth protruding portion, the fourth protruding portion gradually increasing in width from the distal end portion toward the spacer portion; the width of the fifth protruding portion gradually increases from the proximal end portion toward the spacing portion; a first opening is formed between the first protruding portion and the fourth protruding portion, and a second opening is formed between the second protruding portion and the fifth protruding portion.

The invention also provides a surgical anastomat which comprises a handle assembly, a rod body assembly and an end effector, wherein the handle assembly is connected to one end of the rod body assembly, the end effector is connected to the other end of the rod body assembly, the end effector comprises a stitching mechanism, the stitching mechanism comprises a nail bin and a stitching nail forming piece, the nail bin is used for accommodating stitching nails, the stitching nail forming piece enables the stitching nails pushed out from the nail bin to be bent and formed, and the stitching mechanism is the stitching mechanism.

Compared with the prior art, the invention realizes the control of the bending forming process of the suturing nail by the first extension part and the second extension part, thereby overcoming the problem of poor forming caused by the swinging of the suturing nail in the forming part due to the overlarge opening of the forming part, and improving the forming effect.

Drawings

FIG. 1 is a schematic view of a prior art anvil construction;

FIG. 2 is a schematic structural view of a suturing mechanism according to the present invention;

FIG. 3 is a schematic structural view of the staple former of FIG. 2;

FIG. 4 is an enlarged view of the circled portion of FIG. 3;

FIG. 5 is a schematic view of the staple former of FIG. 2 shown in another perspective;

fig. 6 is an enlarged view of the circled portion in fig. 5.

Detailed Description

Reference will now be made in detail to 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 used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The meaning of "a number" is at least one.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 2 to 6, the suturing mechanism provided by the invention is used for a surgical anastomat, and comprises a cartridge assembly and an anvil assembly, wherein the cartridge assembly comprises a cartridge 40, the anvil assembly comprises a suturing nail shaped piece 30, and the cartridge 40 and the suturing nail shaped piece 30 are matched with each other to suture tissues. The staple former 30 includes a body 31 extending in a longitudinal direction, the body 31 having a forming surface 32, and a plurality of forming portions 33 formed by being depressed downward from the forming surface 32, respectively. The body 31 includes two side portions 311 and a groove 312 located between the two side portions 311, the molding surface 32 of the side portion 311 includes a first surface 32l and a second surface 322, the first surface 321 is closer to the groove 312 than the second surface 322, and the first surface 321 protrudes from the second surface 322. Staple profiles 30 are adapted to mate with the cartridge 40, which is provided with knife slots for the knife to travel within, and recesses 312 of the staple profiles 30 are adapted to receive the tops of the knife that travel within the recesses 312 of the staple profiles 30 as the knife travels within the knife slots. Before suturing and cutting, the tissue needs to be clamped and squeezed to discharge tissue fluid of the tissue to be sutured; first surface 321 protrudes from second surface 322 such that the distance between first surface 321 and the staple cartridge is less than the distance between second surface 322 and the staple cartridge, the squeezing force at first surface 321 being greater than the squeezing force at second surface 322, thereby creating a fluid gradient from first surface 321 towards second surface 322, causing interstitial fluid to drain within the tissue from first surface 321 towards second surface 322 and from second surface 322 towards non-squeezed tissue. The plurality of forming portions 33 are aligned in a row in the longitudinal direction. The plurality of forming portions 33 are arranged in a plurality of rows in a transverse direction perpendicular to the longitudinal direction. Staple former 30 mates with the cartridge. The number of profiles 33 of staple profiles 30 is greater than or equal to the number of staples contained in the cartridge. When the staple forming member 30 is suitable for the staple boxes with various specifications, the number of the staples contained in the staple boxes with different specifications is different, and the number of the forming parts 33 of the staple forming member 30 is larger than or equal to the number of the staples contained in the staple box with any specification.

The cartridge 40 is provided with a staple outlet 401, said staple outlet 401 being aligned with said forming section 33. The sewing mechanism has the following functions: the tissue to be sutured is clamped between the suturing nail forming member 30 and the nail bin 40, and the suturing nail is pushed out from the nail outlet 401 of the nail bin 40 to penetrate through the clamped tissue to be sutured and abut against the forming part 33 on the suturing nail forming member 30, so that the U-shaped suturing nail is bent into a B shape, and the purpose of suturing the tissue is achieved.

Each forming part 33 has a forming space 34, the forming space 34 is a groove recessed from the forming surface 32 toward the inside of the body 31, a spacing part 40 is provided in the middle area of the forming space 34, and the spacing part 40 divides the forming space 34 into two independent forming grooves. The staples (not shown) are generally U-shaped with two legs, one formation 33 for each staple and one formation recess for each leg, each leg being bent under the influence of the corresponding formation recess. Each profile 33 has opposite distal and proximal ends 391, 392, the distal end 391 being the end of the profile 33 distal from the operator and the proximal end 392 being the end of the profile 33 proximal to the operator.

A longitudinal line between two first end points of the distal end portion 391 and two second end points of the proximal end portion 392 is defined as a first longitudinal side wall 35 and a second longitudinal side wall 36 of the molding portion 33, wherein the first longitudinal side wall 35 is parallel to and opposite the second longitudinal side wall 36. The first extension 37 extends from the first longitudinal side wall 35 towards the forming space 34, the second extension 38 extends from the second longitudinal side wall 36 towards the forming space 34, and the second extension 38 is opposite to the first extension 37; in other words, the first extension portion 37 and the second extension portion 38 are disposed in the forming space 34, the spacer portion 40 is disposed in the middle region of the forming space 34, and both lateral ends of the spacer portion 40 are respectively connected to the first extension portion 37 and the second extension portion 38. The longitudinal direction is the lengthwise direction. Transverse refers to a direction perpendicular to the longitudinal direction and parallel to the forming surface 32.

The first and

second extensions

37 and 38 are provided such that the region of the molding space 34 near the distal end portion 391 and the proximal end portion 392 has a larger opening portion, and the region of the molding space 34 near the spacer 40 has a smaller opening portion, that is, the opening width of the region of the opening portion of the molding space 34 near both ends is larger than the opening width of the region of the opening portion of the molding space 34 near the spacer 40. The width and spacing in the present invention are both dimensions in the transverse direction.

Specifically, the first extension portion 37 has a first protrusion 371, a second protrusion 372 and a third protrusion 373 which are integrally formed, the first protrusion 371 is adjacent to the distal end portion 391, the second protrusion 372 is adjacent to the proximal end portion 392, and the third protrusion 373 is located between the first protrusion 371 and the second protrusion 372, wherein in the longitudinal direction of the staple forming member 30, the width of the first protrusion 371 gradually increases from the distal end portion 391 toward the third protrusion 373, and the width of the second protrusion 372 gradually increases from the proximal end portion 392 toward the third protrusion 373. The second extension 38 has a fourth protrusion 381, a fifth protrusion 382 and a sixth protrusion 383 which are integrally formed, the fourth protrusion 381 is adjacent to the distal end portion 391, the fifth protrusion 382 is adjacent to the proximal end portion 392, and the sixth protrusion 383 is located between the fourth protrusion 381 and the fifth protrusion 382, wherein in the longitudinal direction of the staple forming member 30, the width of the fourth protrusion 381 gradually increases from the distal end portion 391 to the sixth protrusion 383, and the width of the fifth protrusion 382 gradually increases from the proximal end portion 392 to the sixth protrusion 383. Further, the widths of the first protrusion 371, the second protrusion 372 and the third protrusion 373 are the pitches from the edges of the first protrusion 371, the second protrusion 372 and the third protrusion 373 to the first longitudinal sidewall 35, respectively; the widths of the fourth protrusion 381, the fifth protrusion 382 and the sixth protrusion 383 are the distances from the edges of the fourth protrusion 381, the fifth protrusion 382 and the sixth protrusion 383 to the second longitudinal side wall 36, respectively. The width of the first protrusion 371 gradually increases from the distal end portion 391 toward the third protrusion 373 until the width of the third protrusion 373 is equal at the boundary with the third protrusion 373, and the width of the second protrusion 372 gradually increases from the proximal end portion 392 toward the third protrusion 373 until the width of the third protrusion 373 is equal at the boundary with the third protrusion 373; the width of the fourth protrusion 381 gradually increases from the distal end portion 391 toward the sixth protrusion 383 until it is equal to the width of the sixth protrusion 383 at the interface with the sixth protrusion 383, and the width of the fifth protrusion 382 gradually increases from the proximal end portion 392 toward the sixth protrusion 383 until it is equal to the width of the sixth protrusion 383 at the interface with the sixth protrusion 383.

The first extension portion 37 formed by the first protrusion 371, the second protrusion 372 and the third protrusion 373, and the second extension portion 38 formed by the fourth protrusion 381, the fifth protrusion 382 and the sixth protrusion 383 are respectively trapezoidal bumps.

In this embodiment, the width of the third protrusion 373 is the same as that of the sixth protrusion 383, but the invention is not limited thereto. The spacing between the third protrusion 373 and the sixth protrusion 383 is greater than or equal to 0.2 millimeters; the spacing between the first protrusion 371 and the fourth protrusion 381 is less than or equal to 0.9 mm, and the spacing between the first protrusion 371 and the fourth protrusion 381 is greater than or equal to 0.2 mm; the spacing between the second tab 372 and the fifth tab 382 is less than or equal to 0.9 millimeters, and the spacing between the second tab 372 and the fifth tab 382 is greater than or equal to 0.2 millimeters. Since the leg diameter of the staple is 0.2 mm, the distance of less than or equal to 0.9 mm can lead the leg of the staple to be easily led into the space between the first protrusion 371 and the fourth protrusion 381 and the space between the second protrusion 372 and the fifth protrusion 382, and the leg of the staple is further led into the space between the third protrusion 373 and the sixth protrusion 383 with the distance of greater than or equal to 0.2 mm by the cooperation of the first protrusion 371 and the fourth protrusion 381, and the leg of the staple is further led into the space between the third protrusion 373 and the sixth protrusion 383 with the distance of greater than or equal to 0.2 mm by the cooperation of the second protrusion 372 and the fifth protrusion 382, and the distance of greater than or equal to 0.2 mm can prevent the leg from shaking and can not clamp the leg. 0.2 mm is the diameter of the legs of the staples, i.e. the minimum of the spacing between the third 373 and sixth 383 projections is the diameter of the legs of the staples.

Further, each forming space 34 has two forming grooves, each forming groove having one forming surface 341, the forming surface 341 being the bottom surface of the forming groove. The forming surface 341 allows the legs of the staple to be bent.

In another embodiment of the present invention, the third protrusion 373 and the sixth protrusion 383 may be omitted, that is, the first extension portion 37 has the first protrusion 371 and the second protrusion 372, and the second extension portion 38 has the fourth protrusion 381 and the fifth protrusion 382, wherein the width of the first protrusion 371 gradually increases from the distal end portion 391 toward the spacer 40, and the width of the second protrusion 372 gradually increases from the proximal end portion 392 toward the spacer 40; the width of the fourth protrusion 381 gradually increases from the distal end portion 391 toward the spacer 40, and the width of the fifth protrusion 382 gradually increases from the proximal end portion 392 toward the spacer 40. At this time, the first extending portion 37 formed by the first protrusion 371 and the second protrusion 372 and the second extending portion 38 formed by the fourth protrusion 381 and the fifth protrusion 382 are, for example, triangular bumps or arc bumps (the arc bumps protrude into the molding space). The spacing between the first protrusion 371 and the fourth protrusion 381 is less than or equal to 0.9 mm, and the spacing between the first protrusion 371 and the fourth protrusion 381 is greater than or equal to 0.2 mm; the spacing between the second tab 372 and the fifth tab 382 is less than or equal to 0.9 millimeters, and the spacing between the second tab 372 and the fifth tab 382 is greater than or equal to 0.2 millimeters. Since the leg diameter of the staple is 0.2 mm, the distance less than or equal to 0.9 mm can lead the leg of the staple to be easily led into between the first projection 371 and the fourth projection 381 and between the second projection 372 and the fifth projection 382, the leg of the staple is led into between the first projection 371 and the fourth projection 381 to be gradually reduced to be greater than or equal to 0.2 mm by the cooperation of the first projection 371 and the fourth projection 381, and the leg of the staple is led into between the second projection 372 and the fifth projection 382 to be gradually reduced to be greater than or equal to 0.2 mm by the cooperation of the second projection 372 and the fifth projection 382, and the distance greater than or equal to 0.2 mm can prevent the leg from shaking and not be clamped. In this embodiment, each forming space 34 has two forming grooves, each forming groove having one forming surface 341, the forming surface 341 being the bottom surface of the forming groove. The forming surface 341 allows the legs of the staple to be bent. 0.2 mm is the diameter of the legs of the staple, i.e., the minimum of the spacing greater than or equal to 0.2 mm is the diameter of the legs of the staple.

It should be noted that, for convenience of describing the structural features of the forming space 34, the first longitudinal sidewall 35 and the second longitudinal sidewall 36 are drawn by dashed lines in fig. 3 to 6, and since the first extending portion 37 is integrally formed with the first longitudinal sidewall 35, the second extending portion 38 is integrally formed with the second longitudinal sidewall 36, that is, the dashed lines do not appear on the forming surface 32 of the actual product.

The first protrusion 371 is opposite to the fourth protrusion 381, and the first protrusion 371 and the fourth protrusion 381 have a first length H1 respectively in the longitudinal extension direction of the body 31; the second protrusion 372 and the fifth protrusion 382 are opposite to each other, and in the longitudinal extension direction of the body 31, the second protrusion 372 and the fifth protrusion 382 respectively have a second length H2; the third protrusion 373 is opposite to the sixth protrusion 383, and the third protrusion 373 and the sixth protrusion 383 respectively have a third length H3 in the longitudinal extending direction of the body 31; wherein the sum of the first length H1 and the second length H2 is less than or equal to the third length H3.

As can be seen from the above description, the forming space 34 of the forming part 33 of the staple forming member 30 is provided with the first extending part 37 and the second extending part 38 which are opposite to each other, and the plurality of protrusions of the first extending part 37 and the second extending part 38, which are located at the distal end part 391 and the proximal end part 392, have widths which gradually increase from the distal end part 391 or the proximal end part 392 toward the spacing part 40, so that the distal end part 391 and the proximal end part 392 of the forming space 34 have larger opening widths, so that the staples can be respectively inserted into the forming space 34 from the distal end part 391 and the proximal end part 392, and the area of the forming space 34 close to the spacing part 40 has smaller opening portions, so that when the staples are bent and formed in the forming space 34, the staples can be limited by the smaller opening portions, thereby preventing the staples from shaking in the forming space.

The invention also provides a surgical anastomat which comprises a handle assembly, a rod body assembly and an end effector, wherein the handle assembly is connected to one end of the rod body assembly, the end effector is connected to the other end of the rod body assembly, the end effector comprises a stitching mechanism, the stitching mechanism comprises a nail bin and a stitching nail forming piece, the nail bin is used for accommodating stitching nails, the stitching nail forming piece enables the stitching nails pushed out from the nail bin to be bent and formed, the stitching nail forming piece is matched with the nail bin to stitch tissues, the stitching mechanism is the stitching mechanism, and the stitching nail forming piece is the stitching nail forming piece.

In summary, the invention realizes the control of the bending forming process of the suturing nail by the first and the second extension parts, so as to overcome the problem of poor forming caused by the swaying of the suturing nail in the forming part due to the overlarge opening of the existing forming part, and improve the forming effect.

Although the embodiment of the present invention has been shown and described, it is understood that the above embodiment is illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiment without departing from the scope of the present invention, and all such changes, modifications, substitutions and alterations are intended to be within the scope of the present invention.

Claims

1. A suturing nail former comprising a body extending in a lengthwise direction, the body having a profiled surface from which a plurality of profiled portions are respectively formed by downwardly recessing, the forming surface characterized in that:

each forming part comprises a first extending part, a second extending part and a forming space, the forming part further comprises a spacing part, the spacing part divides the forming space into two forming grooves, the forming part is provided with a proximal end part and a distal end part which are opposite, the proximal end part is positioned on one side of the spacing part, and the distal end part is positioned on the other side of the spacing part;

2. The staple former of claim 1, wherein the first extension further comprises a third tab disposed between the first tab and the second tab, the third tab having a width equal to the maximum width of the first tab and a width equal to the maximum width of the second tab; the second extension further comprises a sixth tab disposed between the fourth tab and the fifth tab, the sixth tab having a width equal to a maximum width of the fourth tab and a width equal to a maximum width of the fifth tab; wherein a third opening is formed between the third protrusion and the sixth protrusion.

3. The staple former of claim 2, wherein the first and second extensions are each trapezoidal shaped bumps.

4. The staple former of claim 2, wherein a spacing between the third and sixth tabs in the transverse direction is greater than or equal to 0.2 millimeters.

5. The staple former of claim 1, wherein a spacing between the first and fourth tabs in the transverse direction is greater than or equal to 0.2 millimeters and a spacing between the first and fourth tabs is less than or equal to 0.9 millimeters.

6. The staple former of claim 1, wherein a spacing between the second and fifth tabs in the transverse direction is greater than or equal to 0.2 millimeters and a spacing between the second and fifth tabs is less than or equal to 0.9 millimeters.

7. The staple forming assembly of claim 1, wherein the first extension of the first and second tabs is a triangular or arcuate projection and the second extension of the fourth and fifth tabs is a triangular or arcuate projection.

8. The staple former of claim 2, wherein the first and fourth tabs each have a same first length, the second and fifth tabs each have a same second length, and the third and sixth tabs each have a same third length in the lengthwise extension of the body, wherein the sum of the first and second lengths is less than or equal to the third length.

9. The staple former of claim 1, wherein the forming portion further comprises a forming surface that is a bottom surface of the forming groove.

10. The staple former of claim 1, wherein the body includes two sides and a recess between the two sides, the contoured surfaces of the sides including a first surface and a second surface, the first surface being closer to the recess than the second surface, the first surface being raised from the second surface.

11. A surgical stapler comprising a staple former and a cartridge, said cartridge accommodating staples and said staple former bending-forming said staples pushed out from said cartridge, characterized in that said staple former is a staple former as claimed in any one of claims 1-10.

12. A suturing mechanism for a surgical stapler including a staple cartridge containing staples and staple formers which allow the staples to be bent and formed from the staple cartridge, the staple formers including a body extending in a lengthwise direction, the body having a forming surface from which a plurality of formations are formed by a plurality of formations which are each recessed downwardly, the forming surface characterized in that:

each forming part comprises a first extending part, a second extending part and a forming space, the forming part further comprises a spacing part positioned in the forming space, the spacing part divides the forming space into two forming grooves, the forming part is provided with a proximal end part and a distal end part which are opposite, the proximal end part is positioned on one side of the spacing part, and the distal end part is positioned on the other side of the spacing part;

13. The suturing mechanism of claim 12, wherein the first extension further comprises a third protrusion disposed between the first protrusion and the second protrusion, the third protrusion having a width equal to a maximum width of the first protrusion and a width equal to a maximum width of the second protrusion; the second extension further comprises a sixth tab disposed between the fourth tab and the fifth tab, the sixth tab having a width equal to a maximum width of the fourth tab and a width equal to a maximum width of the fifth tab; wherein a third opening is formed between the third protrusion and the sixth protrusion.

14. The suturing mechanism of claim 12, wherein the first and second extensions are each trapezoidal shaped protrusions.

15. The suturing mechanism of claim 13, wherein a spacing between the third and sixth protrusions in the transverse direction is greater than or equal to 0.2 millimeters.

16. The suturing mechanism of claim 12, wherein a spacing between the first and fourth protrusions is greater than or equal to 0.2 millimeters and a spacing between the first and fourth protrusions is less than or equal to 0.9 millimeters in the transverse direction.

17. The suturing mechanism of claim 12, wherein a spacing between the second and fifth protrusions is greater than or equal to 0.2 millimeters and a spacing between the second and fifth protrusions is less than or equal to 0.9 millimeters in the transverse direction.

18. The suturing mechanism of claim 12, wherein a first extension of the first and second protrusions is a triangular or arcuate tab and a second extension of the fourth and fifth protrusions is a triangular or arcuate tab.

19. The suturing mechanism of claim 13, wherein the first and fourth protrusions each have a same first length, the second and fifth protrusions each have a same second length, and the third and sixth protrusions each have a same third length, wherein a sum of the first and second lengths is less than or equal to the third length, in a lengthwise extension of the body.

20. The suturing mechanism of claim 13 wherein the molding portion further includes a molding surface that is a bottom surface of the molding recess.

21. The suturing mechanism of claim 12, wherein the body includes two sides and a groove therebetween, the contoured surfaces of the sides including a first surface and a second surface, the first surface being closer to the groove than the second surface, the first surface protruding from the second surface.

22. A surgical stapler comprising a handle assembly connected to one end of a shaft assembly, a shaft assembly and an end effector connected to the other end of the shaft assembly, the end effector comprising a stapling mechanism including a staple cartridge containing staples and a staple former that forms the curved staples from the staple cartridge, wherein the stapling mechanism is as claimed in any one of claims 12 to 21.