CN109984791B - Nail bin, nail bin assembly, nail forming part and surgical anastomat - Google Patents

Abstract

The nail bin is provided with a nail bin body, the nail bin body is provided with a first matching surface, the first matching surface is of a curved surface structure, the curved surface structure is provided with a plurality of first protruding portions and a plurality of first concave portions, each first protruding portion and each first concave portion are alternately arranged, and the first matching surface is provided with a groove with an outward opening. According to the nail bin provided by the invention, the first anastomosis surface of the nail bin is of a curved surface structure, so that the friction force between the first anastomosis surface and a tissue to be anastomosed is improved, and the tissue to be anastomosed is not easy to form displacement between the nail bin and the staple forming part after the nail bin and the staple forming part are clamped; and the groove can contain and discharge tissue fluid at the target tissue, so that the time for compressing the tissue to the specified thickness is effectively shortened, and the operation time is shortened.

Description

Nail bin, nail bin assembly, nail forming part and surgical anastomat

Technical Field

The invention relates to a medical device, in particular to a nail bin, a nail bin assembly, a nail forming part and a surgical anastomat using the same, and belongs to the field of medical instruments.

Background

Various surgical cutting anastomats are used for replacing the needle-thread bare-handed anastomosis operation in surgical operations, are widely used for the end-to-end, end-to-side and side-to-side anastomosis and other operations of organs and tissues such as human digestive tract organs, respiratory tract organs, genitourinary organs and the like, the operations for forming organ channels and the operations for closing incisions, are particularly suitable for the anastomosis operations of organs and tissues which are difficult to expose and operate, can reduce the operation time and improve the operation quality.

The existing surgical stapler comprises a staple cartridge assembly, a staple forming member and a clamping mechanism, wherein the staple cartridge assembly comprises a staple cartridge, a staple cartridge frame for mounting the staple cartridge and a firing mechanism mounted in the staple cartridge frame. The nail pushing block and the anastomosis nail are arranged in the nail bin. The plurality of anastomotic nails are staggered into two rows or more in the nail bin. The firing mechanism consists of a push rod, a nail pushing plate and a cutting knife, wherein the cutting knife can be installed according to the use requirement. Staple forming grooves corresponding to the positions of staples in the magazine are arranged on the surface of the staple forming member. The multiple staple forming grooves are staggered into two or more rows on the surface of the staple forming part. The clamping mechanism comprises a clamping handle, a push rod, a sliding block and an outer sleeve, the nail bin frame is in pivot connection with the formed nail piece, the handle is clamped through percussion, the sliding block is pushed by the push rod, the sliding block pushes the outer sleeve to move forwards to push the formed nail piece, so that the formed nail piece is closed above the nail bin frame, the nail bin assembly is clamped with the formed nail piece, and then the tissue to be anastomosed is clamped between the formed nail piece and the nail bin. When suturing, a push rod in the surgical cutting anastomat pushes a nail pushing plate, the nail pushing plate slides along a nail bin to push out anastomosis nails in the nail bin, and the front ends of the anastomosis nails after being pushed out of the nail penetrate through tissues to be anastomosed and are contacted with an anastomosis nail forming groove of a nail forming piece to form.

However, in the above-mentioned suturing operation process, the staple cartridge assembly and the staple forming member are clamped, when the tissue to be anastomosed is clamped between the staple forming member and the staple cartridge, the tissue to be anastomosed is displaced between the staple forming member and the staple cartridge due to the resistance applied to the push rod by the tissue to be anastomosed when the instrument operator shakes or takes out the staple, which affects the suturing effect. In response to the above problems, there are improvements such as providing a plurality of raised ridges on the surface of the staple cartridge (the surface for contacting the tissue to be stapled), the ridges surrounding the proximal and distal ends of the staple exit opening on the surface of the staple cartridge; although the design can solve the problem of displacement of the sutured tissue, the nail bin with the structure puts higher requirements on production and preparation. Since the size of the staple outlet on the surface of the ridge staple cartridge is already very small, when ridges surrounding the proximal end and the distal end of the staple outlet on the surface of the staple cartridge are formed on the very small-sized staple outlet, unevenness is likely to occur in the connection between the ridges and the edge of the staple outlet, and the unevenness makes the resistance of the staple pushing plate to push the staples to protrude from the staple outlet large. Tissue fluid in target tissue between the nail bin assembly and the nail forming piece flows slowly, and long time (generally more than 15 seconds) is needed for squeezing the tissue to a certain thickness, so that after the end effector is closed, a period of time is needed to wait for the tissue to reach the required squeezing thickness, the surgical cutting and hair-cutting anastomat can be triggered, and the operation time is prolonged. If the time from closing the end effector to firing the surgical cutting stapler (i.e., the squeezing time) is short and less than 15 seconds required by the instrument, the tissue fluid cannot be sufficiently discharged from the target tissue, the tissue fluid is difficult to compress, so that the target tissue containing a large amount of tissue fluid is difficult to compress, the thickness of the target tissue between the staple cartridge assembly and the staple abutting seat cannot reach the safe range of effective suturing, the tissue is insufficiently squeezed, the phenomena of inconsistent ready-made staples, secondary staple formation and the like can be caused, the postoperative symptoms of bleeding, tissue leakage, tissue necrosis and the like at the cut part can be caused, the smooth operation of the operation is influenced, and unnecessary pain is caused to a patient.

In view of the above, the present invention provides a new staple cartridge, which can not only effectively prevent the displacement of the tissue to be anastomosed between the staple forming member and the staple cartridge, but also accelerate the discharge of the tissue fluid in the target tissue.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a nail bin and a surgical anastomat, solves the problems of displacement of tissues to be anastomosed, high resistance of the anastomotic nail to be output and poor forming of the anastomotic nail in the anastomosis process of the nail bin, and can accelerate the discharge of tissue fluid in target tissues. The invention is realized by the following technical scheme:

the invention provides a nail bin which is used for a surgical anastomat and comprises a nail bin body, wherein the nail bin body is provided with a first anastomosis surface, the first anastomosis surface is of a curved surface structure, the curved surface structure is provided with a plurality of first convex parts and a plurality of first concave parts, and the first convex parts and the first concave parts are alternately arranged.

Alternatively, the first anastomotic surface is provided with a recess for receiving and draining interstitial fluid.

As an optional technical scheme, one end of the groove is intersected with the outer side face of the nail bin body to form an opening of the groove.

Alternatively, the groove comprises a monomer groove.

Alternatively, the grooves comprise double body grooves.

As an optional technical solution, the bottom surface of the groove is an inclined surface.

Optionally, the staple cartridge further comprises a staple pushing groove perpendicular to the first anastomosis surface, wherein the height of the groove farther from the staple pushing groove is increased compared with the height of the groove closer to the staple pushing groove.

As an optional technical solution, the first convex portion is a convex arc structure, and the first concave portion is a concave arc structure.

As an optional technical solution, the first concave part has a lowest position, the first convex part has a highest position, and a vertical distance between the lowest position and the highest position is 0.3 mm to 0.6 mm.

As an optional technical solution, the liquid crystal display panel further comprises a plurality of protruding structures, wherein each first recess portion is provided with a plurality of protruding structures, and the protruding structures protrude from each first recess portion respectively.

As an alternative technical solution, the first concave part has the lowest position, and the first convex part has the highest position; each protruding structure has a top surface that is flush with the highest location; alternatively, the top surface is lower than the uppermost position.

As an alternative technical scheme, the plurality of protruding parts are one or a combination of a plurality of spherical salient points, truncated cone-shaped columns or bar-shaped blocks.

As an optional technical solution, the staple cartridge body has a plurality of staple outlet holes, the plurality of staple outlet holes respectively penetrate through the staple cartridge body, a gap portion is provided between an edge of each protruding portion and an adjacent staple outlet hole, the gap portion enables a first distance to be provided between the edge of each protruding structure and the adjacent staple outlet hole, and the first distance is greater than 0.

As an optional technical solution, the nail cartridge body has a plurality of nail discharge holes, the nail discharge holes respectively penetrate through the nail cartridge body, the nail discharge holes are alternately arranged on the nail cartridge body to form a plurality of rows of nail discharge regions, the plurality of rows of nail discharge regions extend along the longitudinal direction of the nail cartridge body, wherein the plurality of rows of nail discharge regions include a first row of nail discharge regions, a second row of nail discharge regions and a third row of nail discharge regions, which are adjacent and parallel to each other.

As an optional technical solution, a first connecting portion extending along the transverse direction of the staple cartridge body is arranged between the first staple discharging area and the third staple discharging area, and the plurality of protruding structures are respectively arranged on the first connecting portion; or in each row of nail discharging areas, a second connecting part extending along the longitudinal direction of the nail bin body is arranged between any two adjacent nail discharging holes, and the protruding structures are arranged on the second connecting parts; or a third connecting part extending along the longitudinal direction of the nail bin body is arranged between the first nail discharge area and the second nail discharge area, a fourth connecting part extending along the longitudinal direction of the nail bin body is arranged between the second nail discharge area and the third nail discharge area, and the plurality of protruding structures are respectively arranged on the third connecting part and the fourth connecting part.

As an optional technical scheme, the plurality of protruding structures and the nail bin body are integrally formed.

The invention also provides a nail bin assembly which comprises a nail bin, a nail bin frame for mounting the nail bin and a firing mechanism mounted in the nail bin frame, wherein the nail bin is the nail bin as described in any one of the above items.

The invention also provides a surgical anastomat, which comprises a staple forming piece and a staple cabin seat, wherein the staple forming piece is pivotally connected with the staple cabin seat; the surgical anastomat also comprises a nail bin assembly, and the nail bin assembly is contained in the nail bin seat; the staple cartridge assembly comprises a staple cartridge, and the staple cartridge is any one of the staple cartridges described above.

The invention provides a staple forming piece for a surgical anastomat, which comprises a forming body, wherein the forming body is provided with a second matching surface, the second matching surface is of a curved surface structure, the curved surface structure is provided with a plurality of second convex parts and a plurality of second concave parts, and the second convex parts and the second concave parts are alternately arranged.

As an optional technical solution, the second convex portion is a convex arc structure, and the second concave portion is a concave arc structure.

The invention also provides a surgical anastomat, which comprises a staple forming piece and a staple bin seat, wherein the staple forming piece is pivotally connected with the staple bin seat; the staple forming member is any one of the staple forming members described above.

Optionally, the staple cartridge is any one of the staple cartridges described above.

Compared with the prior art, according to the nail bin or the nail forming part provided by the invention, the first anastomosis surface of the nail bin or the second anastomosis surface of the nail forming part is of a curved surface structure, so that the friction force between the first anastomosis surface or the second anastomosis surface and the tissue to be anastomosed is improved, and the tissue to be anastomosed is not easy to form displacement between the nail bin and the nail forming part after the nail bin and the nail forming part are clamped. In addition, by arranging the plurality of protruding structures on the first concave part of the curved surface structure, the plurality of protruding structures are beneficial to the consistent thickness of the tissue to be anastomosed in different areas on the first anastomotic surface of the nail bin, and even under the condition that the first anastomotic surface is the curved surface structure, the forming stability of the anastomotic nail can still be ensured; at the same time, the plurality of protruding structures may further reduce the displacement of the tissue to be anastomosed on the first anastomotic surface. The groove is formed in the first anastomosis surface of the nail bin assembly, the groove forms a tissue fluid containing space and a discharge channel, the tissue fluid discharge speed is improved, the time for compressing tissues to the specified thickness is effectively shortened, special waiting is not needed, the operation continuity of doctors is met, the operation time is shortened, the situation that the tissue is squeezed insufficiently is avoided, and the forming effect of the anastomosis nails is further guaranteed.

Drawings

FIG. 1 is a schematic view of a staple cartridge according to a first embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of a staple cartridge according to a second embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of a staple cartridge according to a third embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of a staple cartridge according to a fourth embodiment of the present invention;

FIG. 5 is an enlarged partial schematic view of a staple cartridge according to a fifth embodiment of the present invention.

FIG. 6a is a transverse cross-sectional view of a staple cartridge assembly along a recess according to an embodiment of the present invention;

FIG. 6B is an enlarged view of the structure at B in FIG. 6 a;

FIG. 7a is an enlarged view of the structure at A in FIG. 1;

FIG. 7b is an enlarged view of an alternative configuration at A in FIG. 1;

FIG. 7c is an enlarged view of the third feature at A in FIG. 1;

FIG. 7d is an enlarged view of a fourth feature at A in FIG. 1;

fig. 7e is an enlarged view of the fifth structure at a in fig. 1.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the 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 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.

FIG. 1 is a schematic view of a staple cartridge according to a first embodiment of the present invention.

As shown in fig. 1, thecartridge 100 is used in a surgical stapler (not shown), thecartridge 100 includes acartridge body 10, thecartridge body 10 has afirst anastomosis surface 11, thefirst anastomosis surface 11 is a curved surface structure, the curved surface structure has a plurality offirst protrusions 20 and a plurality offirst recesses 30, eachfirst protrusion 20 and eachfirst recess 30 are alternately arranged along a longitudinal direction Z1 of the cartridge, thefirst protrusions 20 and thefirst recesses 30 are smoothly connected with each other, and an upper surface of thefirst protrusion 20 and an upper surface of thefirst recess 30 are both curved surfaces. The up and down directions refer to directions perpendicular to both the longitudinal direction Z1 and the transverse direction Z2, and thefirst stapling surface 11 is located at the upper portion of thecartridge body 10 with respect to thecartridge body 10. In fig. 1, in order to more intuitively illustrate the first protrudingportion 20 and the first recessedportion 30, a virtual boundary line a is provided between the first protrudingportion 20 and the first recessedportion 30, but it is to be understood that the virtual boundary line a does not exist on the actual product; in actual products, the virtual dividing line a can be regarded as a joint of the firstconvex portion 20 and the firstconcave portion 30. When thenail bin 100 and the staple forming piece (not shown) clamp the tissue to be anastomosed, the resistance of the tissue to be anastomosed sliding on thenail bin 100 is increased by the curved surface structure, so that the problem of displacement of the tissue to be anastomosed between thenail bin 100 and the staple forming piece caused by the resistance of the push rod applied by the tissue to be anastomosed in the process of shaking or staple removing of an operator can be solved. The staple forming part is the staple abutting seat. In this embodiment, the first protrudingportion 20 has thehighest position 21, the first recessedportion 30 has thelowest position 31, and the vertical distance between thehighest position 21 and thelowest position 31 is 0.3 mm to 0.6 mm, wherein the vertical distance is the distance between thehighest position 21 and thelowest position 31 along the up-and-down direction. For convenience of illustration, thehighest position 21 and thelowest position 31 are respectively shown by dotted lines, but the dotted lines do not appear on the surface of the actual product. It is understood that the firstconcave portion 30 is a concave arc structure, and the lowest point of the concave arc structure is thelowest position 31; similarly, the firstconvex portion 20 is a convex arc structure, and the highest point of the convex arc structure is thehighest position 21, i.e. thefirst anastomosis surface 11 of thenail cartridge 100 is a curved surface structure.

In addition, since thefirst anastomosis surface 11 of thestaple cartridge 100 is a curved surface structure, when thestaple cartridge 100 and the corresponding staple forming member clamp the tissue to be anastomosed, the gap between thestaple cartridge 100 and the corresponding staple forming member is a fixed value, and the tissue to be anastomosed belongs to biological tissue, contains a large amount of tissue fluid and fat and has fluidity, when the tissue to be anastomosed is clamped on the curved surface structure, the thickness of the tissue to be anastomosed on the firstconcave portion 30 of the curved surface structure is easily larger than that of the tissue to be anastomosed on the firstconvex portion 20 of the curved surface structure, and the tissue to be anastomosed is too thick or too thin, which is not favorable for forming the staples. Therefore, in order to overcome the above problems, the present invention limits the vertical distance from the lowest position of the firstconcave portion 30 to the highest position of the firstconvex portion 20 to 0.3 mm to 0.6 mm, which not only ensures the curved surface structure to achieve the above effect of preventing the displacement of the tissue to be anastomosed between the staple cartridge and the staple forming member, but also avoids the problems of too large thickness of the tissue to be anastomosed on the firstconcave portion 30 and too thin thickness of the tissue to be anastomosed on the firstconvex portion 20, thereby improving the forming effect of the staple.

As shown in FIG. 1, thecartridge body 10 is provided with a plurality of staple ejection holes 50 penetrating through thecartridge body 10, and the plurality of staple ejection holes 50 are staggered in thecartridge body 10 to form a plurality of rows of staple ejection regions extending along the longitudinal direction Z1 of thecartridge body 10. Specifically, in the present embodiment, themagazine body 10 has a pusher moving groove or a cutter moving groove, the pusher moving groove or the cutter moving groove divides themagazine body 10 into a first body portion and a second body portion along the longitudinal direction Z1 of themagazine body 10, and the plurality of nail ejection holes 50 are respectively provided in the first body portion and the second body portion. The plurality of nail discharge holes 50 form a firstnail discharge area 51, a secondnail discharge area 52 and a thirdnail discharge area 53 which are adjacent and parallel to each other on the first body of thenail bin body 10, and the nail discharge holes 50 in the firstnail discharge area 51 and the thirdnail discharge area 52 are respectively staggered with the nail discharge holes in the secondnail discharge area 52. The arrangement of the plurality of nail holes 50 on the second body of thenail magazine body 10 is the same as the arrangement of the plurality of nail holes 50 on the first body of thenail magazine body 10, and further description thereof is omitted.

With continued reference to fig. 1, in order to further overcome the condition that the thickness of the tissue to be stapled on thefirst recess 30 is greater than that of the tissue to be stapled on thefirst protrusion 20, so as to improve the stability of staple formation, a plurality of protrudingstructures 40 are disposed on thefirst recess 30, and the plurality of protrudingstructures 40 protrude from thefirst recess 30. Preferably, the top surface of the protrudingstructure 40 is lower than thehighest position 21 of the first protrudingpart 20, or the top surface of the protrudingstructure 40 is flush with thehighest position 21 of the first protrudingpart 20.

In addition, in order to avoid the problem of high staple ejection resistance in the stapling operation, afirst gap portion 41 is provided between the edge of the plurality of protrudingstructures 40 closest to the adjacentstaple ejection hole 50 and the adjacentstaple ejection hole 50, and thefirst gap portion 41 is configured to provide a first distance between the edge of the protrudingstructure 40 and the adjacentstaple ejection hole 50, and the first distance is greater than 0. The first distance is greater than 0, and when the staples extend out of the staple outlet holes 50, the resistance of the protrudingstructures 40 to the staples can be reduced, so that the staples can be discharged more smoothly.

In the first embodiment of the present invention, the plurality of protrudingstructures 40 are, for example, ball bumps respectively, and the plurality of ball bumps are disposed on thelowest position 31 of the first recessedportion 30; on the first body of thestaple cartridge body 10, a first connectingportion 60 extending along the transverse direction Z2 of thestaple cartridge body 10 is provided between the firststaple discharging region 51 and the thirdstaple discharging region 53, that is, one end of the first connectingportion 60 is a side wall of thestaple discharging hole 50 of the firststaple discharging region 51, and the other end of the first connectingportion 60 is a side wall of the parallel and oppositestaple discharging hole 50 in the thirdstaple discharging region 53, wherein a plurality of spherical bumps are provided on the first connectingportion 60, a first distance is provided between an edge of the spherical bump and the side wall of thestaple discharging hole 50 of the secondstaple discharging region 52, and the first distance is greater than 0. In addition, the arrangement of the plurality of spherical bumps on the second body of thestaple cartridge body 10 in fig. 1 is the same as the arrangement on the first body, which is not described herein again, but is not limited thereto, that is, the arrangement of the plurality of spherical bumps on the first body and the second body may be different. Further, the number of the plurality of ball bumps disposed on the first connectingportion 60 is, for example, 2, but not limited thereto. In other embodiments of the present invention, the protrudingstructure 40 may be disposed outside the firstnail discharging region 51; alternatively, the protrudingstructures 40 may be disposed outside the thirdstaple ejection region 53, wherein "outside" is a direction away from the longitudinal direction Z1 of thestaple cartridge body 10, and the number of the protrudingstructures 40 may be set according to actual needs. The sphere may be a portion of a sphere. FIG. 2 is an enlarged partial schematic view of a staple cartridge according to a second embodiment of the present invention.

Elements in fig. 2 having the same reference numerals as those in fig. 1 have similar functions, and are not described in detail herein. In the second embodiment of the present invention, the staple cartridge 100' is different from thestaple cartridge 100 only in that the arrangement of the plurality of protrudingstructures 40 on thefirst recess 30 is different. Specifically, the plurality of protrudingstructures 40 are, for example, spherical bumps, and in the first body of thecartridge body 10, the firststaple ejection region 51 to the thirdstaple ejection region 53, a second connectingportion 61 is provided between the end portions of any two adjacent staple ejection holes 50 in each staple ejection region, the second connectingportion 61 extends in the same direction as the longitudinal direction Z1 of thecartridge body 10, the plurality of spherical bumps are respectively and correspondingly provided on the second connectingportion 61, and asecond gap portion 42 is provided between the edge of each spherical bump and the end portion of eachstaple ejection hole 50, and thesecond gap portion 42 enables the edge of each spherical bump to have a second distance to the end portion of eachstaple ejection hole 50, and the second distance is also larger than 0. The second distance is greater than 0, and when the staples extend out of the staple outlet holes 50, the resistance of the protrudingstructures 40 to the staples can be reduced, so that the staples can be discharged more smoothly.

In addition, the arrangement of the plurality of spherical bumps on the second body of thestaple cartridge body 10 in fig. 2 is the same as that on the first body, and is not described herein again, but is not limited thereto. That is, in other embodiments of the present invention, the arrangement of the plurality of spherical bumps on the first body and the second body may be different, for example, the arrangement of the protruding structures on the first body of thecartridge body 10 may be the arrangement of the spherical bumps as shown in fig. 1, and the arrangement of the protruding structures on the second body of thecartridge body 10 may be the arrangement of the spherical bumps as shown in fig. 2.

FIG. 3 is an enlarged partial schematic view of a staple cartridge according to a third embodiment of the present invention.

Elements in fig. 3 having the same reference numerals as those in fig. 1 have similar functions, and are not described herein again. In the third embodiment of the present invention, thestaple cartridge 100 "differs from thestaple cartridge 100 only in the arrangement of the plurality of protrudingstructures 40 on the first recessedportion 30. Specifically, each of the plurality of protrudingstructures 40 is, for example, a spherical bump, and on the first body of themagazine body 10, a third connectingportion 62 extending along the longitudinal direction Z1 of themagazine body 10 is provided between the firstnail ejection region 51 and the secondnail ejection region 52, a fourth connectingportion 63 extending along the longitudinal direction Z1 of themagazine body 10 is provided between the secondnail ejection region 52 and the thirdnail ejection region 53, thenail ejection hole 50 of the secondnail ejection region 52 is spaced between the third connectingportion 62 and the fourth connectingportion 63, the spherical bump is provided corresponding to the third connectingportion 62 and the fourth connectingportion 63, athird gap 43 is provided between the edge of the spherical bump and the adjacentnail ejection hole 50, and thethird gap 43 provides a third distance between the edge of the spherical bump and the side wall and the end of thenail ejection hole 50, and the third distance is greater than 0. The third distance is greater than 0, and when the staples extend out of the staple outlet holes 50, the resistance of the protrudingstructures 40 to the staples can be reduced, so that the staples can be discharged more smoothly.

In addition, the arrangement of the plurality of spherical bumps on the second body of thestaple cartridge body 10 in fig. 3 is the same as that on the first body, and is not described herein again, but is not limited thereto. That is, in other embodiments of the present invention, the arrangement of the plurality of spherical bumps on the first body and the second body may be different, for example, the arrangement of the protruding structures on the first body of thecartridge body 10 may be the arrangement of the spherical bumps as shown in fig. 3, and the arrangement of the protruding structures on the second body of thecartridge body 10 may be the arrangement of the spherical bumps as shown in fig. 1 or fig. 2.

FIG. 4 is an enlarged partial schematic view of a staple cartridge according to a fourth embodiment of the present invention; FIG. 5 is an enlarged partial schematic view of a staple cartridge according to a fifth embodiment of the present invention.

In fig. 4 and 5, elements having the same reference numerals as those in fig. 1 have similar functions, and are not described herein again. As shown in fig. 4, thestaple cartridge 200 is different from thestaple cartridge 100 only in the protrudingstructure 70 on thefirst recess 30, and the shape of the protrudingstructure 70 is a cylinder or a truncated cone, wherein the arrangement of the protrudingstructure 70 on thefirst recess 30 of thestaple cartridge 200 can refer to the description of the first to third embodiments. As shown in fig. 5, thestaple cartridge 300 is different from thestaple cartridge 100 only in that the protrudingstructures 80 on thefirst recess 30 are bar-shaped blocks, wherein the arrangement of the protrudingstructures 80 on thefirst recess 30 of thestaple cartridge 300 can refer to the description of the first to third embodiments.

It should be noted that the shape and number of the protruding structures are not limited in the present invention, that is, the shape and number of the protruding structures can be set according to the actual usage requirement.

As can be seen from the above, the plurality of protrudingstructures 40, 70 or 80 are disposed on the first recessedportion 30, when the wavy curved surface structure of the staple cartridge clamps the tissue to be anastomosed, the plurality of protrudingstructures 40, 70 or 80 can respectively abut against and disperse the tissue to be anastomosed located in the first recessedportion 30, so that the tissue to be anastomosed on the first recessedportion 30 is extruded by the plurality of protruding structures to move toward the region where the first protrudingportion 20 is located, thereby reducing the thickness difference between the thickness of the tissue to be anastomosed on the first recessedportion 30 and the thickness of the tissue to be anastomosed on the first protrudingportion 20, facilitating the thicknesses of the tissue to be anastomosed clamped on the firstanastomotic surface 11 of the curved surface structure to approach each other, and further improving the anastomotic formation of the staples. In addition, the plurality ofprojection structures 40, 70 or 80 may further reduce the displacement of the tissue to be stapled on thefirst stapling surface 11.

In order to improve the convenience of manufacturing the magazine of the present invention, the plurality of protrudingstructures 40, 70, or 80 are integrally formed with themagazine body 10, for example, by injection molding or 3D printing.

The present invention also provides a staple cartridge assembly comprising one of thestaple cartridges 100, 100', 100 ", 200, 300 described above. In addition, the nail bin assembly further comprises anastomosis nails and a nail pushing block, wherein the anastomosis nails are contained in the nail bin, and the nail pushing block pushes the anastomosis nails to extend out of the nail outlet holes of the nail bin.

The present invention also provides a surgical stapler (not shown) comprising a cartridge assembly (not shown) comprising one of thecartridges 100, 100', 100 ", 200, 300 as described above.

Further, based on similar design considerations, in other embodiments of the present invention, the second stapling surface of the staple forming member of the surgical stapler may also be provided with a curved surface structure similar to the first stapling surface of the staple cartridge described above. For example:

the present invention also provides a staple former (not shown) for use in a surgical stapler, the staple former having a forming body (not shown) with a second stapling surface (not shown); the second mating surface is a curved structure (not shown) having a plurality of second protrusions (not shown) and a plurality of second recesses (not shown), and the second protrusions and the second recesses are alternately arranged. Preferably, the second convex portion is of a convex arc structure, and the second concave portion is of a concave arc structure. For the detailed description of the second protrusion and the second recess, reference may be made to the first protrusion and the first recess of the staple cartridge, which are not repeated herein. Furthermore, the invention also provides a surgical stapler comprising a staple former as described above.

As shown in FIG. 1, therecess 39 formed in the first stapling surface of the cartridge assembly defines a tissue fluid discharge channel. Due to the arrangement of thegroove 39, the discharge of tissue fluid becomes smooth, further enhancing the effect of fluid gradient. Further, the nail cavity penetrates the first anastomosis surface to form a nail outlet, and agroove 39 with an outward opening is formed on the outer side of the first anastomosis surface. Therecesses 39 are evenly distributed along the outer side of the first mating surface, and the openings of therecesses 39 extend to intersect with the outer side of thecartridge body 10, i.e., one end of therecess 39 is formed by being recessed downward from thefirst mating surface 10, and the recess extends to intersect with the outer side of thecartridge body 10 along a substantially outward direction, and the intersection is the other end of the recess 39 (i.e., the opening of the recess 39). Thegrooves 39 form small spaces for holding tissues in the pressing space, and the held tissues are subjected to a small pressing force and a small degree of pressing, so that the held tissues can hold tissue fluid discharged from other pressed tissues not held in thegrooves 39. And, therecess 39 is formed on the firstanastomotic surface 10 and extends outward to intersect with the outer side of thecartridge body 10, so that therecess 39 connects the inside and outside of the pressing space, and the tissue accommodated in therecess 39 forms a channel for discharging the tissue fluid of the pressed tissue inside the pressing space to the outside of the pressing space without pressing the tissue, thereby increasing the flow capacity of the tissue fluid between the inside and outside of the pressing space. Thegroove 39 is not intersected with thenail outlet hole 50 and the nail cavity, so that thegroove 39 plays a role of a fluid channel, the discharge of tissue fluid is accelerated, and the suturing of the anastomotic nail is not interfered. FIGS. 7 a-7 e are enlarged views of the structure at A in FIG. 1; thegroove 39 includes a single body groove having one groove body and a double body groove having two groove bodies, the single body groove may have a "U" shape (as shown in fig. 7 a), an arc shape (as shown in fig. 7 b) and an "S" shape (as shown in fig. 7 d), and the double body groove may have a "herringbone" shape (as shown in fig. 7 c) and a "herringbone" shape (as shown in fig. 7 e). The tissue fluid in the present invention refers to a fluid that can be discharged from the inside of a tissue, and specifically refers to an extracellular fluid.

Preferably, thebottom surface 391 of thegroove 39 is a slope, defining the up and down direction, i.e., the direction perpendicular to both the longitudinal direction Z1 and the transverse direction Z2, as the "depth" direction of thegroove 39, and further, the depth of thegroove 39 farther from the staple pusher groove 34 is increased compared to the depth of thegroove 39 closer to the staple pusher groove 34, in other words, the depth of thegroove 39 is increased the farther from the staple pusher groove 34. FIG. 6a is a transverse cross-sectional view of a staple cartridge assembly along a recess and FIG. 6B is an enlarged view of feature B in FIG. 6a, in accordance with an embodiment of the present invention. As shown in FIG. 6b, the depth of thegroove 39 near the staple pushing groove 34 is H1, and the depth of thegroove 39 far from the staple pushing groove 34 is H2, wherein H1 < H2. Thus, the inclined surface and the curved surface have a high inner side and a low outer side, which is more conducive to discharge of interstitial fluid. Since the liquid is difficult to compress and the tissue rich in the tissue fluid is difficult to squeeze, the tissue fluid at the target tissue is discharged quickly, the time for compressing the tissue to a specified height can be effectively shortened, and the discharge speed of the tissue fluid is improved by thegroove 39 arranged on the first anastomosis surface of the cartridge component.

In summary, according to the staple cartridge or the staple forming member provided by the invention, the first anastomosis surface of the staple cartridge or the second anastomosis surface of the staple forming member is a curved surface structure, so that the friction force between the first anastomosis surface or the second anastomosis surface and the tissue to be anastomosed is improved, and after the staple cartridge and the staple forming member are clamped, the tissue to be anastomosed is not easy to form displacement between the staple cartridge and the staple forming member. In addition, by arranging the plurality of protruding structures on the first concave part of the curved surface structure, the plurality of protruding structures are beneficial to the consistent thickness of the tissue to be anastomosed in different areas on the first anastomotic surface of the nail bin, and even under the condition that the first anastomotic surface is the curved surface structure, the forming stability of the anastomotic nail can still be ensured; at the same time, the plurality of protruding structures may further reduce the displacement of the tissue to be anastomosed on the first anastomotic surface. Thegroove 39 formed in the first anastomosis surface of the staple cartridge assembly forms a tissue fluid containing space and a discharge channel, so that the tissue fluid is smoothly discharged, the time required for squeezing can be met from the closing of theend effector 100 to the firing of the surgical cutting and hair stapler, special waiting is not required, the operation continuity of a doctor is met, the operation time is shortened, the situation that the tissue squeezing is insufficient is avoided, and the forming effect of the anastomosis staple is further ensured.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. 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, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (18)

1. A staple cartridge for a surgical stapler, the staple cartridge having a staple cartridge body with a first stapling surface, characterized in that:

the first inosculating surface is a curved surface structure, the curved surface structure is provided with a plurality of first convex parts and a plurality of first concave parts, and the first convex parts and the first concave parts are alternately arranged;

the first anastomosis surface is provided with a recess for receiving and expelling interstitial fluid;

the groove forms a small space for containing tissues in the pressing space, and when the anastomat is closed, the tissue contained in the groove is pressed to a smaller degree, so that the tissue contained in the groove can contain tissue liquid discharged by the pressed tissue which is not contained in the groove.

2. The staple cartridge of claim 1, wherein one end of said recess intersects an outer side surface of said staple cartridge body forming an opening of said recess.

3. The staple cartridge of claim 1, wherein said recess comprises a unitary trough.

4. The staple cartridge of claim 1, wherein said recess comprises a double body slot.

5. The staple cartridge of claim 1, wherein a bottom surface of said recess is beveled.

6. The staple cartridge of claim 1, further comprising a staple pushing slot perpendicular to the first stapling surface, wherein the height of the recess distally from the staple pushing slot increases compared to the height of the recess proximally from the staple pushing slot.

7. The staple cartridge of claim 1, wherein said first convex portion is convex and said first concave portion is concave.

8. The staple cartridge of any one of claims 1-7, wherein the first recessed portion has a lowermost position and the first raised portion has an uppermost position, and a vertical distance from the lowermost position to the uppermost position is 0.3 mm to 0.6 mm.

9. The staple cartridge of any one of claims 1-7, further comprising a plurality of protruding structures disposed on each first recess and protruding from each first recess.

10. The staple cartridge of claim 9, wherein the first recessed portion has a lowermost position and the first raised portion has an uppermost position; each protruding structure has a top surface that is flush with the highest location; alternatively, the top surface is lower than the uppermost position.

11. The staple cartridge of claim 9, wherein the plurality of protrusions are one or a combination of spherical bumps, truncated conical pillars, or bars.

12. The staple cartridge of claim 9, wherein the staple cartridge body comprises a plurality of staple holes, the plurality of staple holes respectively penetrate through the staple cartridge body, and a gap is formed between the edge of each protruding structure and the adjacent staple hole, so that the gap provides a first distance between the edge of each protruding structure and the adjacent staple hole, and the first distance is greater than 0.

13. The staple cartridge of claim 9, wherein the staple cartridge body comprises a plurality of staple ejection holes, the plurality of staple ejection holes extending through the staple cartridge body, the plurality of staple ejection holes being staggered on the staple cartridge body to form a plurality of rows of staple ejection regions extending along a longitudinal direction of the staple cartridge body, wherein the plurality of rows of staple ejection regions comprises a first row of staple ejection regions, a second row of staple ejection regions, and a third row of staple ejection regions that are adjacent and parallel to each other.

14. The staple cartridge according to claim 13, wherein a first connecting portion extending along a transverse direction of the staple cartridge body is disposed between the first staple ejection region and the third staple ejection region, and the plurality of protruding structures are respectively disposed on the first connecting portions; or in each row of nail discharging areas, a second connecting part extending along the longitudinal direction of the nail bin body is arranged between any two adjacent nail discharging holes, and the protruding structures are arranged on the second connecting parts; or a third connecting part extending along the longitudinal direction of the nail bin body is arranged between the first nail discharge area and the second nail discharge area, a fourth connecting part extending along the longitudinal direction of the nail bin body is arranged between the second nail discharge area and the third nail discharge area, and the plurality of protruding structures are respectively arranged on the third connecting part and the fourth connecting part.

15. The staple cartridge of claim 9, wherein a plurality of said protruding structures are integrally formed with said staple cartridge body.

16. A staple cartridge assembly comprising a staple cartridge, a cartridge carrier for mounting the staple cartridge and a firing mechanism mounted in the cartridge carrier, wherein the staple cartridge is according to any one of claims 1-15.

17. A surgical stapler comprises a staple forming member and a staple cartridge seat, wherein the staple forming member is pivotally connected with the staple cartridge seat; the surgical anastomat also comprises a nail bin assembly, and the nail bin assembly is contained in the nail bin seat; the staple cartridge assembly comprises a staple cartridge, characterized in that the staple cartridge is according to any one of claims 1-15.

18. A surgical anastomat comprises a nail cartridge forming piece and a nail cartridge seat, wherein the nail cartridge forming piece is pivotally connected with the nail cartridge seat and is provided with a forming body, the forming body is provided with a second anastomosis surface, and the surgical anastomat further comprises a nail cartridge assembly which is accommodated in the nail cartridge seat; the second inosculating surface is a curved surface structure, the curved surface structure is provided with a plurality of second convex parts and a plurality of second concave parts, the second convex parts and the second concave parts are alternately arranged, the second convex parts are of convex arc structures, and the second concave parts are of concave arc structures; the staple cartridge assembly comprises a staple cartridge according to any one of claims 1 to 15.

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