Staple cartridge structure, anvil, and stapler with staple cartridge structure or anvil

Abstract

Provided are a staple cartridge structure, an anvil, and a stapler with a staple cartridge structure or an anvil. The staple cartridge structure comprises a cartridge body comprising an upper surface, two end portions, and an outer side wall connecting the two end portions. An anastomosis surface is divided into left and right anastomosis areas. A slit is located between the two anastomosis areas. A plurality of staple cartridge slots extend downward from either anastomosis area. The anvil comprises an anvil base body, a blade slot, at least two sets of first staple slots, and two sets of anti-slip assemblies. The anvil base body is provided with an anvil surface. The blade slot is configured for passage of a cutting blade. Each set of first staple slots is constituted by a plurality of first recesses disposed at intervals along the extending direction of the blade slot. Each set of anti-slip assemblies is constituted by a plurality of anti-slip protrusions spaced apart from each other. The stapler comprises the aforementioned staple cartridge structure or the anvil, with the staple cartridge structure and the anvil being interconnected. The present invention achieves the discharge of internal fluids to the exterior of the stapler by means of structures such as the staple cartridge slots formed in the staple cartridge structure or the anvil, thereby facilitating smooth cutting operations and staple formation.

Description

Nail cartridge structure, anvil, and stapler with the same Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a staple cartridge structure, an anvil, and an anastomosis device with the staple cartridge structure or the anvil. Background Art

[0002] The end effector of the linear cutting stapler is a stapler structure, which includes a staple cartridge seat and a staple anvil hinged to each other, wherein the staple cartridge seat is used to receive the staple cartridge structure;

[0003] The staple cartridge structure includes a staple cartridge body and staples arranged in the staple cartridge body. The staple cartridge body is provided with a plurality of staple cavities for accommodating staples. The staple cartridge body includes a top end surface, on which a staple outlet is formed by the staple cavity penetrating the top end surface.

[0004] After the staple cartridge structure and the staple anvil engage with each other to clamp the tissue and fire the staples, the staples are blocked by the staple anvil above after passing through the tissue and bend inward, forming a "B"-shaped staggered arrangement, thereby anastomosing the two layers of tissue together.

[0005] The stapler is a crucial component of the stapler. A stapler is a device used to replace manual suturing. It works by using titanium staples to separate or staple tissue, similar to a stapler. Staplers can be divided into various types based on their application, such as skin staplers, circular staplers for the digestive tract, and rectal staplers. The main function of the stapler is to support and secure the staple magazine during operation, ensuring that the staples in the magazine can correctly separate and staple tissue. It typically works in conjunction with other stapler components, such as the staple pusher and staple cartridge, to achieve precise tissue suturing.

[0006] The anastomosis surface and the surface of the stapler seat of the traditional staple magazine structure are both flat. When the anastomosis structure is used to compress thick tissue, the body tissue contains tissue fluid, which will affect the anastomosis staples from passing through the tissue to form a good and stable anastomosis structure. How to eliminate the tissue fluid is the technical problem to be solved by the present invention. In addition, the surface friction of the traditional planar staple magazine structure is insufficient, and tissue slippage often occurs during the anastomosis process.

[0007] Similarly, since human tissue contains a large amount of tissue fluid and the tissue fluid is sticky, slippage is likely to occur between the tissue and the anvil during surgical anastomosis, thereby affecting the anastomosis effect, prolonging the operation time, and causing pain to the patient. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a staple cartridge structure, an anvil, and a stapler with the staple cartridge structure or the anvil, which has the following objectives:

[0009] Purpose 1: By opening a stapler slot on the anastomotic surface of the stapler body, the internal liquid can be discharged to the outside of the stapler, thereby improving the reliability of the stapler structure anastomosis and reducing the risk of tissue compression.

[0010] Purpose 2: To increase the contact area between the anvil and the tissue to be cut, thereby solving the problem of easy slippage between the tissue and the anvil during surgical anastomosis in the prior art.

[0011] The present invention is implemented through the following technical solution: A nail magazine structure includes a magazine body, and the magazine body includes:

[0012] upper surface;

[0013] two ends;

[0014] an outer side wall connecting the two ends;

[0015] The anastomotic surface is located on the upper surface and is divided into two anastomotic areas: left and right;

[0016] a slot located between the two anastomotic regions, extending longitudinally downward from the upper surface and extending horizontally between the two ends;

[0017] A plurality of staple cavities, each of which has an opening surface, and each staple cartridge is equipped with an anastomotic staple;

[0018] A plurality of staple cartridge slots extend downward from any one of the anastomotic regions, and each staple cartridge slot extends horizontally from the narrow slot toward the outer side wall.

[0019] A stapler comprises the above-mentioned staple magazine structure and a first anvil, wherein the staple magazine structure and the first anvil are connected to each other.

[0020] An anvil, comprising an anvil base having an anvil surface;

[0021] A knife groove is used for the cutting knife to pass through, and the knife groove extends from the anvil surface along the length direction and thickness direction of the anvil base, dividing the anvil surface into two parts;

[0022] and at least two groups of first nail grooves, wherein the at least two groups of first nail grooves are respectively arranged on two parts of the abutment surface;

[0023] Each group of the first nail grooves is composed of a plurality of first grooves spaced apart along the extending direction of the knife groove, a first partition is formed between two adjacent first grooves, and the top of the first partition is flush with the nail support surface;

[0024] Two groups of anti-slip components are respectively arranged on the outer edges of the two parts of the nail-resistant surface. Each group of anti-slip components is composed of a plurality of anti-slip protrusions arranged at intervals along the horizontal extension direction of the knife groove; the anti-slip protrusions are in the shape of long strips extending vertically from the outer edge toward the knife groove.

[0025] In some embodiments, each portion of the nail-receiving surface includes a first base surface and a second base surface, both of which extend parallel to the knife groove, the first base surface is higher than the second base surface, and the first base surface is adjacent to the knife groove. The multiple anti-slip protrusions of the anti-slip component are arranged based on the second base surface, and the top of the anti-slip protrusion is at the same height as the first base surface.

[0026] In some embodiments, at least one group of second nail groove assemblies is further provided on the second base surface, each group of second nail groove assemblies includes at least one row of second nail grooves, each row of second nail grooves is composed of a plurality of second grooves arranged at intervals along the extension direction of the knife groove, and a second partition is formed between two adjacent second grooves, and the top of the second partition is flush with the second base surface.

[0027] In some embodiments, a plurality of groups of the first nail slot assemblies are arranged on the first base surface in parallel along the horizontal extension direction of the knife slot, and the first nail slots in two adjacent groups of the first nail slot assemblies are staggered in a direction perpendicular to the extension direction of the knife slot.

[0028] In some embodiments, the anvil further includes fenders symmetrically arranged on both sides of the anvil base, and the fenders are integrally formed with the anvil base.

[0029] In some embodiments, the anti-slip protrusion has a target length, and the target length of the anti-slip protrusion is the same as the horizontal maximum thickness value of the fender; the side of the anti-slip protrusion is conical, and the cone has an arc-shaped top, so that the gap between adjacent anti-slip protrusions gradually widens from the nail surface upward.

[0030] In some embodiments, the bottom width of the anti-slip protrusion is 0.5mm~1mm, the bottom width of the gap between two adjacent anti-slip protrusions is 0.3mm~0.6mm, and the measurement direction of the bottom width of the anti-slip protrusion and the bottom width of the gap between the two anti-slip protrusions is parallel to the horizontal extension direction of the knife groove.

[0031] In some embodiments, a first slope is formed between the first base surface and the second base surface, and the first slope is disposed at an end of the first base surface away from the fender.

[0032] In some embodiments, the anvil further includes a bottom surface, a second slope is formed between the second base surface and the bottom surface, and the second slope is arranged at an end of the second base surface away from the fender.

[0033] According to another aspect of the present application, a stapler is also disclosed, which includes a stapler as described in any one of the above items and a first staple magazine structure, wherein the first staple magazine structure includes multiple staple magazines on a staple magazine mating surface, isolation grooves between the multiple staple magazines, a knife groove located in the middle of the staple magazine surface, and multiple anti-slip protrusions located on the edge of the staple magazine mating surface; when the stapler is engaged with the first staple magazine structure, the anti-slip protrusion on the staple magazine mating surface and the multiple anti-slip protrusions on the stapler are staggered in the horizontal direction.

[0034] In some embodiments, the knife groove extends along the length direction and the horizontal direction of the nail magazine mating surface of the first nail magazine structure, the isolation groove is located between multiple nail magazines, and the isolation groove extends from the knife groove to the anti-slip protrusion.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. The present invention provides a stapler slot on the anastomotic area of ​​the anastomotic surface, thereby discharging the internal liquid to the outside of the stapler, avoiding the presence of tissue fluid that affects the anastomotic effect of the staples on the tissue; and this design does not increase the thickness of the stapler, and is not likely to cause tissue damage even when squeezing thick tissue.

[0037] 2. Nail magazine slots of different shapes are designed. According to different anastomosis scenarios, nail magazine slots of different shapes are selected to meet different anastomosis requirements and ensure drainage effect.

[0038] 3. An occlusal staple magazine groove has been added. On the one hand, the occlusal staple magazine grooves are connected to each other, which effectively drains the tissue fluid. On the other hand, the outer occlusal staple magazine groove forms a tooth-shaped groove structure, which can improve the gripping ability of the anastomotic structure and effectively avoid tissue slippage.

[0039] 4. The present application provides anti-slip protrusions on the anvil surface. The anti-slip protrusions increase the contact area between the anvil seat and the tissue to be cut, increase the friction between the anvil assembly and the tissue to be cut, and help reduce the slippage between them. The anti-slip protrusions are long strip-shaped, and drainage grooves are formed between the anti-slip protrusions, which can facilitate the discharge of squeezed body fluids to the outside of the clamping surface between the anvil seat and the nail magazine seat, thereby facilitating the smooth progress of the cutting operation and nailing.

[0040] 5. The nail-anchoring surface is configured to include a first base surface and a second base surface, and the height of the anti-slip protrusion is designed to be flush with the first base surface so as not to affect the nailing effect during the anastomosis process;

[0041] 6. The first base surface is higher than the second base surface, so that there is a height difference between the first base surface and the second base surface. This height difference increases the contact area between the anvil assembly and the tissue to be cut, further increases the friction between the anvil assembly and the tissue to be cut, and helps to reduce the slippage between them.

[0042] 7. The present application can be provided with multiple sets of nail slot assemblies, which increases the number of nail slot groups, can provide more fixing point options for the anvil, and enhance its ability to adapt to different surgical needs;

[0043] 8. The fender and anvil base are integrally molded. Integrating the fender and anvil base eliminates the connection interface between them, minimizing stress concentration at the interface and improving the rigidity and deformation resistance of the entire fixture. Furthermore, the one-piece molding process reduces assembly steps and improves production efficiency.

[0044] 9. By setting the first slope and the second slope, a slow transition space is provided for the anvil, which allows the anvil to slowly enter the tissue along the slope instead of directly colliding with the vertical tissue surface, which is conducive to the smooth progress of the cutting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic diagram of the three-dimensional structure of an anastomotic structure embodiment 1 of the present invention;

[0046] FIG2 is a top view of FIG1 ;

[0047] Figure 3 is an enlarged view of point F in Figure 2;

[0048] FIG4 is a schematic diagram of a staple cartridge slot having a uniform width;

[0049] FIG5 is a schematic diagram of a staple cartridge slot having a variable width slot structure;

[0050] FIG6 is a schematic diagram of a nail magazine slot having a funnel-shaped slot structure;

[0051] FIG7 is a schematic diagram of a nail magazine slot having a gourd-shaped slot structure;

[0052] FIG8 is a schematic structural diagram of Example 2 in which a staple cartridge slot is added based on FIG13;

[0053] FIG9 is a schematic structural diagram of Example 3 in which an occlusal nail magazine slot is added based on FIG1 ;

[0054] Figure 10 is an enlarged view of point A in Figure 9;

[0055] Figure 11 is a side view of the bin body of Example 3;

[0056] FIG12 is an enlarged view of point B in FIG11 ;

[0057] FIG13 is a side view of the anastomotic structure constructed based on Example 3;

[0058] FIG14 is an enlarged view of point C in FIG5 ;

[0059] Figure 15 is a top view of the bin body of Example 3;

[0060] FIG16 is a schematic diagram showing the flow of tissue fluid after clamping tissue according to the present invention;

[0061] FIG17 is a schematic structural diagram of an anvil according to an embodiment of the present invention;

[0062] FIG18 is another structural schematic diagram of an anvil according to an embodiment of the present invention;

[0063] FIG19 is another structural diagram of an anvil according to an embodiment of the present invention;

[0064] FIG20 is an enlarged schematic diagram of point X in FIG19;

[0065] FIG21 is a schematic plan view of the anvil of FIG19;

[0066] FIG22 is an enlarged view of point Y in FIG21;

[0067] FIG23 is a side view of the stapler according to an embodiment of the present invention;

[0068] FIG24 is an enlarged view of the Z position in FIG23;

[0069] FIG. 25 is a top view of a staple cartridge according to an embodiment of the present invention.

[0070] Explanation of reference numerals: 1 magazine body, 11 matching surface, 111 matching area, 12 nail cavity, 13 narrow slot, 14 nail magazine slot, 141 uniform width slot structure, 142 variable width slot structure, 143 funnel-shaped slot structure, 144 gourd-shaped slot structure, 2 occlusal nail magazine slot, 3-nail support base, 31-first base surface, 311-knife groove, 312-first nail groove group, 313-first groove, 314-first partition, 32-second base surface, 321-anti-slip group, 322-anti-slip protrusion, 323-second nail groove group, 324-second groove, 325-second partition, 42-fender, 43-first slope, 44-second slope; 5-first nail magazine structure; 51-anti-slip protrusion; 52-nail magazine, 53-isolation groove, 56-nail magazine matching surface; 57-knife groove. 6 first anvil, 61 toothed structure. DETAILED DESCRIPTION

[0071] The present invention is described in detail below with reference to the accompanying drawings:

[0072] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "far", "near", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0073] As shown in Figure 1-12: A nail magazine structure includes a magazine body 1, and the magazine body 1 includes:

[0074] upper surface;

[0075] two ends;

[0076] an outer side wall connecting the two end portions;

[0077] The anastomotic surface 11 is located on the upper surface and is divided into two anastomotic areas 111 on the left and right;

[0078] a slot 13 located between the two anastomotic regions 111 , extending longitudinally downward from the upper surface and horizontally between the two ends;

[0079] There are multiple nail cavities 12, each nail cavity 12 extends downward from the anastomosis area, and each nail magazine is installed with anastomosis nails; the above structures are all existing conventional technologies, and accordingly, the nail magazine structure itself is long and the narrow slot 13 itself is also long and narrow.

[0080] The present invention defines stapler slots 14 in the anastomotic region. Multiple stapler slots 14 extend downward from any of the anastomotic regions 111, and each stapler slot 14 extends horizontally from the narrow slot toward the outer sidewall. When the stapler structure and the first anvil engage with each other, some tissue contacts the anastomotic surface, while some sinks into the stapler slots 14. This allows fluid within the tissue to be more smoothly expelled through the stapler slots 14. The bottom and sidewalls of the stapler slots 14 also exert a squeezing effect on the tissue, guiding fluid out of the tissue more easily.

[0081] The staple cartridge slot 14 is concave, and the thickness of the cartridge body 1 does not change. This ensures that even if the present invention compresses thick tissue, it is not easy to injure the tissue, and does not cause the cartridge body to thicken, thereby avoiding tissue injury caused by increased thickness.

[0082] Furthermore, compared to existing methods that increase friction and prevent slippage by raising the height of the staple cavity to form a protrusion-like structure, the present invention creates a downwardly extending staple cartridge slot, achieving a balance between increasing friction and preventing tissue slippage while reducing the risk of tissue tearing. Specifically, the protrusion structure formed by raising the height of the staple cavity has a smaller force acting on the anastomosing tissue, while by pressing the tissue into the staple cartridge slot, the force acting on the tissue surface is increased compared to the protrusion-like structure, thereby reducing the potential risk of tissue tearing caused by excessive stress concentration.

[0083] At least two rows of staple cavities 12 are arranged in any anastomotic region 111 , and any two adjacent rows of staple cavities 12 are staggered.

[0084] The design of the multiple rows of nail cavities 12 is that any two adjacent rows of nail cavities 12 are staggered in the front-to-back direction, which can ensure the anastomosis effect and avoid tissue damage caused by excessive density.

[0085] Each nail cavity 12 has two ends for guiding the nail feet of the anastomosis nail; the end of the opening surface is flush with the anastomosis surface. The opening surface of the nail cavity 12 can be seen from the plan view to be long and strip-shaped, and the length direction is parallel to the length direction of the narrow slot and also parallel to the length direction of the entire nail magazine structure.

[0086] Furthermore, since an anastomosis staple is provided in the staple cavity 12, the staple is generally placed in the staple magazine in an upward U-shape, with the staple foot located at the end of the staple cavity 12 and the staple beam spanning the middle of the bottom of the staple cavity 12. When the staple is removed, the staple foot passes through the end of the staple cavity 12.

[0087] The plurality of staple cartridge slots 14 extend horizontally from the narrow slot toward the outer side wall, and are disposed through the staple cavities 12 or through the anastomotic areas between the staple cavities 12 to discharge tissue fluid toward the outer side wall.

[0088] Furthermore, the plurality of staple cartridge slots 14 extend horizontally perpendicular to the horizontal extension direction of the narrow slot.

[0089] Furthermore, the staple cartridge slot 14 passes through the middle area of ​​the staple cavity 12 but not through the end portion of the staple cavity 12. The staple cartridge slot 14 can perfectly avoid the staples, ensuring that the staple cavity 12 can smoothly guide the staples out, while also ensuring that the staple legs will not be exposed from the staple surface when not stapled.

[0090] Furthermore, the bottom of the staple magazine groove 14 can be set horizontally and parallel to the anastomotic surface; the bottom of the staple magazine groove 14 can also be set inclined, that is, the depth of the staple magazine groove 14 gradually increases as it moves away from the narrow groove 13, so as to facilitate the removal of tissue fluid.

[0091] Furthermore, in order to ensure the drainage effect, the present invention further proposes the following modified implementations to meet different anastomosis effects according to different anastomosis scenarios:

[0092] As one embodiment, as shown in FIG4 , the staple cartridge slot 14 is a uniform width slot structure 141 extending from a narrow slot to the outer side wall. When the staple cartridge structure and the first anvil engage with each other, part of the tissue contacts the mating surface, while part of the tissue sinks into the staple cartridge slot 14 . Therefore, fluid in the tissue can be more smoothly discharged through the staple cartridge slot 14 . The bottom and sidewalls of the staple cartridge slot 14 also exert a squeezing effect on the tissue, guiding the fluid in the tissue to be discharged more easily.

[0093] As one of the modified embodiments, as shown in Figure 5: the staple cartridge slot 14 is a variable width slot structure 142 extending from the narrow slot to the outer side wall and with increasing width. The design of increasing width causes the tissue near the narrow slot to be subjected to a tighter squeezing force, thereby achieving a more favorable discharge of muscle tissue fluid near the narrow slot, and the staple cartridge slot 14 is wider along the outer side wall, which can provide a smoother discharge path for the tissue fluid, and is conducive to more fully discharging the tissue fluid to both sides of the staple cartridge during the pre-compression stage before the start of staple formation.

[0094] As one of the modified embodiments, as shown in FIG6 , in order to allow the staple cartridge slot 14 to pass through the middle area of ​​the staple cavity 12 but not through the end of the staple cavity 12, the staple cartridge slot 14 perfectly avoids the end of the staple cavity 12, that is, perfectly avoids the staples, ensuring that the staple cavity 12 can guide the staples to be stably ejected and anastomose the tissues, while preventing the local tissue to be anastomosed from being pulled by the concave shape of the staple cartridge slot 14, resulting in poor staple anastomosis. The staple cartridge slot 14 extends horizontally between the outer wall and the narrow slot and has a funnel-shaped slot structure 143. There is a certain distance between the end of the opening surface of the staple cavity 12 and the slot structure 143. Between the ends of the opening surfaces of adjacent staple cavities 12 in the same row, the width of the staple cartridge slot 14 is locally narrowed to ensure that the end of the opening surface of each staple cavity 12 is located on the anastomosis surface, that is, flush with the anastomosis surface.

[0095] As one of the modified embodiments, as shown in Figure 7: the width of the first group of nail magazine slots 14 increases from the middle to the two ends and then decreases to the nail cavity 12, and then extends to the outer wall and the narrow groove gourd-shaped slot structure 144 in an equal width manner. This design of the nail magazine slot is also to achieve that the width of the nail magazine slot 14 is locally narrowed between the ends of the opening surfaces of adjacent nail cavities 12 in the same row to ensure that the end of the opening surface of each nail cavity 12 is located on the anastomotic surface, that is, flush with the anastomotic surface.

[0096] Based on the number of rows of staple cartridges and the position distribution and structure of the staple cartridge slots, the present invention further provides the following three embodiments:

[0097] Example 1

[0098] As shown in Figures 1-3: the nail magazine slots 14 are all arranged to avoid the ends of the nail magazines 12, and the nail magazine includes three rows of nail magazines arranged parallel to the narrow slots 13, wherein the nail magazine slots 14 avoid the nail cavities 12 passing through the middle row, and the nail cavities 12 in the middle row are all located on the anastomotic surface, that is, there is a nail magazine slot 14 between any two adjacent nail cavities 12; the nail magazine slots 14 avoid passing through the ends of a nail cavity 12 in the first and third rows, that is, the ends of the opening surfaces of the nail cavities in the first and third rows are all located on the anastomotic surface, and the non-end parts (middle parts) of the opening surfaces of each nail cavity 12 in the first row are all located at the bottom of the narrow slot, so that the nail magazine slots 14 also pass through the middle parts of a nail cavity 12 in the first and third rows at the same time, thereby forming a continuous drainage path for tissue fluid extending from the narrow slot to the outer wall.

[0099] It should be noted that the structural position distribution of the stapler slot 14 of the present invention needs to be considered. First, it is necessary to ensure that the stapler slot 14 is linear as a whole, so as to ensure the smooth drainage of tissue fluid. In addition, since the stapler slot 14 is concave, that is, it may affect the use of the staples in the staple cavity 12, so when designing the stapler slot 14, the stapler slot 14 is first considered to be provided between any two adjacent staple cavities 12 in the middle row of staple cavities 12 in the anastomosis area 111. The provision of the stapler slot 14 in this area will not affect the staples in the middle row of staple cavities 12. Because in the prior art, any two adjacent rows of staple cavities 12 in the anastomosis area 111 are staggered in the front-to-back direction, thereby ensuring the anastomosis effect and preventing bleeding; based on this design consideration, the stapler slot 14 is extended to both ends. At this time, the stapler slot 14 also passes through the middle of the opening surface of a staple cavity 12 in the first row and the middle of the opening surface of a staple magazine in the third row.

[0100] Example 2

[0101] As a modified embodiment, as shown in Figure 8, the nail magazine slot 14 also passes through the middle of the opening surface of the nail cavity 12 in the middle row, and the nail magazine slot 14 also passes through the area between two adjacent nail cavities 12 in the first row and between two adjacent nail cavities 12 in the third row. The nail magazine slots 14 are all arranged to avoid the ends of the nail magazine 12; relative to the scheme of Example 1, the number of nail magazine slots 14 is increased, which is more conducive to the discharge of tissue fluid.

[0102] The anastomotic region where the staple cartridge slots 14 are distributed in Example 1 and Implementation 2 overlaps with the anastomotic region where all staple cavities 12 are distributed.

[0103] Example 3

[0104] As an improved embodiment, as shown in Figures 9-15, it also includes a plurality of interlocking nail magazine grooves 2 extending downward from the anastomotic surface, located between the anastomotic area where all nail cavities 12 are distributed and the outer wall, and also between the nail magazine grooves 14 and the outer wall.

[0105] Furthermore, an occlusal staple magazine groove 2 is provided on the outer side of the surface of the anastomosis area 111, and there are multiple occlusal staple magazine grooves 2, which are arranged along the narrow groove 13; each of the occlusal staple magazine grooves 2 is a tooth groove 22, and some of the tooth grooves 22 are connected to the staple magazine groove 14 in position to jointly constitute a drainage channel.

[0106] Furthermore, the bottom of the occlusal staple magazine groove 2 can be set horizontally and parallel to the anastomotic surface; the bottom of the occlusal staple magazine groove 2 can also be set inclined, that is, the depth of the occlusal staple magazine groove 2 gradually increases as it moves away from the occlusal staple magazine groove 2, so as to facilitate the removal of tissue fluid.

[0107] As shown in Figures 9-15 , based on Examples 1 or 2, any anastomotic region further includes multiple interlocking staple cartridge slots 2 extending downward from the anastomotic region 111. These multiple interlocking staple cartridge slots 2 extend slightly from the outer sidewall toward the narrow slot, and some intersect with corresponding staple cartridge slots 14. The extension directions of the multiple interlocking staple cartridge slots are parallel and parallel to the extension direction of the staple cartridge slots 2.

[0108] Here, by adding the occlusal staple cartridge groove, the gripping ability can be further improved, tissue slippage can be avoided, and the occlusal staple cartridge groove can be used as a channel for leading out tissue. It should be noted that the occlusal staple cartridge groove is mainly arranged in the anastomotic area between the area where the staple cavities are distributed and the outer wall.

[0109] In any anastomotic area, the number of the engaging staple cartridge slots 2 is greater than the number of the staple cartridge slots 14 , which helps to avoid tissue slippage.

[0110] The adjacent distance between any two adjacent staple cartridge slots 14 is greater than the adjacent distance between any two adjacent occlusal staple cartridge slots 2 . This design helps to prevent tissue slippage.

[0111] The bottom of the occlusal staple cartridge slot 2 is equal to or lower than the bottom of the staple cartridge slot 14 to facilitate the removal of tissue fluid.

[0112] Preferably, the side walls of the staple cartridge slot 14 are inclined at an angle of greater than or equal to 90° relative to the bottom of the staple cartridge slot 14, and the side walls of the engaging staple cartridge slot 2 are inclined at an angle of greater than or equal to 90° relative to the bottom of the staple cartridge slot 14. This angle limitation is primarily intended to facilitate the engagement between the secondary toothed structure 61 provided on the first anvil 6 and the engaging staple cartridge slot 2 when the staple cartridge structure and the first anvil 6 are engaged, thereby further preventing tissue slippage.

[0113] Furthermore, there is a transverse beam structure between adjacent occlusal staple magazine slots 2, and the top width of the transverse beam structure between adjacent occlusal staple magazine slots 2 is greater than zero, that is, it prevents the side walls of the occlusal staple magazine slots 2 from becoming too sharp and causing tissue to be crushed.

[0114] As shown in Figures 1 and 5: The present invention also discloses a stapler, which includes the above-mentioned staple magazine structure and a first staple anvil 6, and the staple magazine structure and the first staple anvil 6 are hinged to each other; a secondary tooth structure 61 corresponding to the position of the occlusal staple magazine slot 2 and having a complementary contour is also provided on the lower surface of the first staple anvil 6; the side walls on both sides of the occlusal staple magazine slot 2 are inclination greater than 90° relative to the bottom of the staple magazine slot 14, which is more conducive to the occlusion between the secondary tooth structure 61 and the occlusal staple magazine slot 2, and is more conducive to preventing tissue slippage.

[0115] Here, the staple magazine structure and the first staple support 6 are hinged to each other as a conventional structure, and the opening and closing of the two are achieved through the firing mechanism of the stapler. The structure and principle thereof are all existing technologies, so they will not be described in detail.

[0116] It should be noted that in order to better define the number of nail magazine slots and explain their functions, explain the design scheme of the present invention and the technical effect to be achieved, the present invention uniformly defines the groove portion extending straight from the narrow groove to the outer wall as a nail magazine slot. Although the nail magazine slot will pass through the middle area of ​​the nail cavity and cause the nail magazine slot to be partially blocked by the nail cavity, the width of the nail cavity in the extension direction of the nail magazine slot (perpendicular to the length direction of the nail magazine structure) is very narrow, and the effect on the tissue fluid discharge path is very small. Therefore, the nail magazine slot can be regarded as an integral groove structure extending along the direction perpendicular to the length of the nail magazine structure and passing through part of the nail cavity.

[0117] It should be noted that, in addition to fine-tuning the nail magazine assembly, the present invention can also fine-tune the nail anvil.

[0118] As shown in Figures 17 to 22, the present application also discloses a nail support. Specifically, the nail support includes a nail support base 3, a knife groove 311, at least two groups of first nail grooves 312 and at least two groups of anti-slip components, wherein the nail support base 3 has a nail support surface, and the knife groove 311 is used for the cutting knife to pass through, extending from the nail support surface along the length direction and thickness direction of the nail support base, dividing the nail support surface into two parts, and at least two groups of nail support grooves are respectively arranged on the two parts of the nail support surface, and each group of first nail grooves 312 is based on the knife grooves along the length direction and thickness direction of the nail support base. A plurality of first grooves 313 arranged at intervals in the extension direction of the groove 311 are communicated with each other, and a first partition 314 is formed between two adjacent first grooves 313. The top of the first partition 314 is flush with the top surface, and at least two groups of anti-slip components are respectively arranged on the outer edges of the two parts of the nail surface. Each group of anti-slip components 321 is composed of a plurality of anti-slip protrusions 322 arranged at intervals along the horizontal extension direction of the knife groove 311. The anti-slip protrusions 322 are in the shape of long strips extending vertically from the outer edge toward the direction of the knife groove 311.

[0119] In one example, the anvil base 3 includes a first base surface 31 and a second base surface 32, wherein the first base surface 31 is higher than the second base surface 32. Both the first base surface 11 and the second base surface 32 extend parallel to the knife groove 311, and the first base surface 31 is adjacent to the knife groove 311. The plurality of anti-slip protrusions 322 of the anti-slip assembly 321 are arranged on the second base surface 32, and the tops of the anti-slip protrusions 322 are located at the same height as the first base surface 31. In this embodiment, as shown in FIG17 , the first nail groove assembly is a single group, i.e., it includes two rows of first nail groove groups 312 symmetrically arranged on both sides of the knife groove 311.

[0120] Furthermore, in one example, the bottom width of the anti-slip protrusion 322 can be 0.5mm to 1mm, and the bottom width of the gap between two adjacent anti-slip protrusions 322 can be 0.3mm to 0.6mm. The bottom width of the anti-slip protrusion 322 and the bottom width of the gap between two anti-slip protrusions 322 are measured in a direction parallel to the horizontal extension direction of the knife groove. The bottom width of the anti-slip protrusion 322 refers to the bottom width of the anti-slip protrusion 322. The anti-slip protrusion 322 structure has an appropriate width and bottom width of the gap, which can facilitate the squeezing of body fluids, prevent damage to tissues, and discharge them out of the clamping surface between the nail anvil and the nail magazine seat, thereby facilitating the smooth cutting operation and nail formation.

[0121] It is understandable that in this embodiment, by providing the anti-slip protrusion 322 on the anvil surface, the contact area between the anvil seat and the tissue to be cut is increased, the friction between the anvil assembly and the tissue to be cut is increased, and this helps to reduce the slippage between them. In addition, the anvil surface is configured to include a first base surface 31 and a second base surface 32, and the height of the anti-slip protrusion 322 is designed to be flush with the first base surface 31, which will not affect the stapling effect during the anastomosis process. Furthermore, the first base surface 31 is higher than the second base surface 32, so that there is a height difference between the first base surface 31 and the second base surface 32. This height difference increases the contact area between the anvil seat and the tissue to be cut, further increases the friction between the anvil assembly and the tissue to be cut, and helps to reduce the slippage between them.

[0122] In some embodiments, as shown in FIG18 , the second base surface 32 is further provided with at least one set of second nail slot assemblies. Each set of second nail slot assemblies includes two symmetrically arranged rows of second nail slot groups 323. Each row of second nail slot groups 323 is composed of a plurality of second grooves 324 spaced apart along the direction in which the knife slot extends. A second partition 325 is formed between two adjacent second grooves 324. The top of the second partition 325 is flush with the second base surface 32. Furthermore, by providing the second nail slot assemblies, the number of nail slot groups is increased, providing more fixing point options for the anvil, thereby enhancing its ability to adapt to different surgical requirements.

[0123] In some embodiments, the first base surface 31 may be provided with multiple groups of first nail slot assemblies arranged in parallel along the horizontal extension direction of the knife slot, with the first nail slots 312 in two adjacent groups of first nail slot assemblies staggered in a direction perpendicular to the extension direction of the knife slot 311. In one embodiment, as shown in FIG19 , two groups of first nail slot assemblies are provided on the first base surface 31. It will be appreciated that the number of first nail slot assemblies provided can be determined based on the surface area of ​​the first base surface 31.

[0124] In some embodiments, the anvil further comprises fenders 42 symmetrically disposed on both sides of the anvil base 3, the fenders 42 having a target thickness. The fenders 42 comprise a first fender surface and a second fender surface, and the target thickness is the distance between the first fender surface and the second fender surface.

[0125] In some embodiments, the fender 42 is integrally formed with the anvil base 3. Integrating the fender 42 and the anvil base 3 eliminates the interface between them. This minimizes stress concentration at the interface and improves the rigidity and deformation resistance of the entire fixture. Furthermore, the integrated molding process reduces assembly steps and improves production efficiency.

[0126] In some embodiments, the anti-slip protrusion 322 is in the shape of a long strip extending vertically from the outer edge toward the knife groove, and the anti-slip protrusion 322 has a target length. The target length of the anti-slip protrusion 322 is the same as the horizontal maximum thickness value of the fender 42. The side of the anti-slip protrusion 322 is conical, and the cone has an arc-shaped top, so that the gap between adjacent anti-slip protrusions 322 gradually widens upward from the nail surface, and the width direction of the target length is the direction extending from the edge of the second base surface 32 to the first base surface 31.

[0127] The anti-slip protrusion structure is long and has a conical side. A drainage groove is formed between the anti-slip protrusions. The cone has an arc-shaped top, which can facilitate the discharge of squeezed body fluids to the outside of the clamping surface of the nail support seat and the nail magazine seat, which is conducive to the smooth progress of the cutting operation and nailing.

[0128] In some embodiments, a first slope 43 is formed between the first base surface 31 and the second base surface 32. The first slope 43 is disposed near the end of the first base surface 31 away from the fender 42. In some embodiments, the anvil further comprises a bottom surface, and a second slope 44 is formed between the second base surface 32 and the bottom surface. The second slope 44 is disposed near the end of the second base surface 32 away from the fender 42. It will be appreciated that the provision of the slope provides a space for a gradual transition for the anvil, allowing the anvil to slowly enter the tissue along this slope rather than directly colliding with a perpendicular tissue surface, thereby facilitating a smooth cutting operation.

[0129] According to another aspect of the present application, a stapler is also disclosed, as shown in Figure 23, the stapler includes any one of the above-mentioned stapler seats and a first staple magazine structure 5, wherein the first staple magazine structure 5 includes multiple staple magazines 52 on the staple magazine mating surface 56, isolation grooves 53 between the multiple staple magazines 52, a knife groove 57 located in the middle position of the staple magazine surface, and multiple anti-slip protrusions 51 located on the edge of the staple magazine mating surface 56; when the stapler seat is engaged with the first staple magazine structure 5, the anti-slip protrusions 51 on the staple magazine mating surface 56 and the multiple anti-slip protrusions 322 on the stapler seat are staggered in the horizontal direction.

[0130] The knife groove 57 extends along the length direction and the horizontal direction of the staple cartridge mating surface 56 of the first staple cartridge structure 5 . The isolation groove 53 is located between the plurality of staple cartridges 52 and extends from the knife groove 57 to the anti-slip protrusion 322 .

[0131] Specifically, the anvil and the first nail magazine structure 5 are hinged to each other; a plurality of anti-slip protrusions 51 are also provided on the nail magazine mating surface 56 of the first nail magazine structure 5, which are staggered with the anti-slip protrusions 322 on the anvil surface; this is more conducive to the engagement of the tissue between the upper surface of the first nail magazine structure 5 and the anvil surface, thereby preventing tissue slippage.

[0132] The staple cartridge mating surface 56 of the first staple cartridge structure 5 is provided with a plurality of staple cartridges 52, a plurality of isolation grooves 53, and a knife groove 57 located in the middle of the staple cartridge mating surface and extending along the length direction of the staple cartridge mating surface. The staple cartridge 52 is used to accommodate staples, and a plurality of isolation grooves 53 extend downward from any staple cartridge mating surface 56, and each isolation groove 53 extends horizontally from the knife groove 57 toward the outer side wall. When the first staple cartridge structure 5 and the staple anvil engage with each other, part of the tissue will contact the staple cartridge mating surface 56, and part of the tissue will sink into the isolation groove 53. Therefore, the liquid in the tissue can be more smoothly discharged through the isolation groove 53. The bottom and side walls of the isolation groove 53 also have a squeezing effect on the tissue, which will guide the tissue liquid to be discharged from the tissue more easily.

[0133] Here, the hinged connection structure between the first staple magazine structure 5 and the stapler seat is a conventional structure, and the opening and closing between the two is achieved through the firing mechanism of the stapler. Its structure and principle are all existing technologies, so they will not be repeated here.

[0134] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A staple cartridge structure, comprising a cartridge body (1), and the cartridge body (1) includes: An upper surface; Two ends; An outer wall connecting the two ends; An anastomosis surface (11), located on the upper surface, divided into left and right anastomosis zones (111); A slot (13), located between the two anastomosis zones (111), longitudinally extending downward from the upper surface and horizontally extending between the two ends; A plurality of staple cavities (12), and an anastomosis staple is installed in each staple cartridge; It is characterized in that: a plurality of staple cartridge slots (14) extend downward from any one of the anastomosis zones (111), and each staple cartridge slot (14) horizontally extends from the slot to the outer wall.

2. The cartridge structure according to claim 1, wherein: The plurality of staple cartridge slots (14) horizontally extend from the slot to the outer wall, at least two columns of staple cavities (12) are evenly arranged in any one of the anastomosis zones (111), and any two adjacent columns of staple cavities (12) are arranged in a staggered manner.

3. The cartridge structure according to claim 1, wherein: The staple cartridge slot (14) is an equal-width groove structure (141) that extends from the slot to the outer wall and has the same width.

4. The cartridge structure according to claim 1, wherein: The staple cartridge slot (14) is a variable-width groove structure (142) that extends from the outer wall to the slot and has an increasing width.

5. The cartridge structure according to claim 1, wherein: The staple cartridge slot (14) is a funnel-shaped groove structure (143) whose width increases from the middle to both ends to the staple cavity (12), and then extends to the outer wall and the slot in an equal-width manner.

6. The cartridge structure according to claim 1, characterized in that: The first group of staple cartridge slots (14) is a gourd-shaped groove structure (144) whose width increases from the middle to both ends and then decreases to the staple cavity (12), and then extends to the outer wall and the slot in an equal-width manner.

7. The cartridge structure according to claim 1, wherein: The staple cartridge includes three columns of staple cartridges arranged parallel to the slot, wherein the staple cartridge slot (14) passes through between any two adjacent staple cavities (12) in the middle column of staple cavities (12); and the staple cartridge slot (14) also simultaneously passes through the middle of the opening surface of a staple cavity (12) in the first column and the middle of the opening surface of a staple cartridge in the third column.

8. The cartridge structure according to claim 1, wherein: Each opening surface of the staple cartridge has two ends for guiding the legs of the anastomosis staple; wherein the ends of the opening surface are flush with the anastomosis surface.

9. The cartridge structure according to claim 1, characterized in that: The staple cartridge includes three columns of staple cartridges arranged parallel to the slot, wherein the staple cartridge slot (14) passes through the middle of the opening surface of the staple cavities (12) in the middle column, and the staple cartridge slot (14) also simultaneously passes through between two adjacent staple cavities (12) in the first column and between two adjacent staple cavities (12) in the third column.

10. The cartridge structure according to any one of claims 1-9, characterized in that: On any anastomosis zone, there are also a plurality of occluding staple cartridge slots (2), and the occluding staple cartridge slots (2) extend downward from the anastomosis zone (111), and the plurality of occluding staple cartridge slots (2) extend from the outer wall toward the slot; and some of the occluding staple cartridge slots (2) are connected to the staple cartridge slots (14).

11. The cartridge structure according to claim 10, wherein: The occluding staple cartridge slot (2) is located between the area where the staple cavities (12) are distributed in any anastomosis zone (111) and the corresponding outer wall of the covering anastomosis zone (111).

12. The cartridge structure according to claim 10, characterized in that: On any anastomosis zone, the number of the occluding staple cartridge slots (2) is greater than the number of the staple cartridge slots (14).

13. The cartridge structure according to claim 10, characterized in that: The adjacent spacing between any two adjacent staple cartridge slots (14) is greater than the adjacent spacing between any two adjacent occluding staple cartridge slots (2).

14. The cartridge structure according to claim 10, characterized in that: The bottom of the described occlusal staple cartridge slot (2) is equal to or lower than the bottom of the staple cartridge slot (14); the inclination of the side walls on both sides of the staple cartridge slot (14) relative to the bottom of the staple cartridge slot (14) is greater than or equal to 90°, and the inclination of the side walls on both sides of the occlusal staple cartridge slot (2) relative to the bottom of the staple cartridge slot (14) is greater than or equal to 90°.

15. A stapler, characterized in that: It includes a staple cartridge structure as described in any one of claims 1-14 and a first anvil (6), and the staple cartridge structure and the first anvil (6) are connected to each other.

16. The stapler according to claim 15, characterized in that: On the left and right sides of the lower surface of the first anvil (6), there are secondary tooth-shaped structures (61) corresponding in position and complementary in contour to the occlusal staple cartridge slot (2).

17. An anvil, characterized in that, The anvil includes an anvil base body (3), and the anvil base body (3) has an anvil surface; A knife groove (311) for the cutting knife to pass through, and the knife groove (311) extends from the anvil surface along the length direction and the thickness direction of the anvil base body, dividing the anvil surface into two parts; And at least two groups of first staple grooves (312), and at least two groups of the first staple grooves (312) are respectively arranged on the two parts of the anvil surface; Each group of the first staple grooves (312) is composed of a plurality of first grooves (313) arranged at intervals along the extending direction of the knife groove (311), and a first partition (314) is formed between two adjacent first grooves (313), and the top of the first partition (314) is flush with the anvil surface; Two groups of anti-slip components are respectively arranged on the outer edges of the two parts of the anvil surface, and each group of the anti-slip components (321) is composed of a plurality of anti-slip protrusions (322) arranged at intervals along the horizontal extending direction of the knife groove (311); the anti-slip protrusions (322) are in the shape of long strips vertically extending from the outer edge towards the knife groove (311).

18. The anvil according to claim 17, characterized in that, Each part of the anvil surface includes a first base surface (31) and a second base surface (32), the first base surface (31) and the second base surface (32) both extend parallel to the knife groove (311), the first base surface (31) is higher than the second base surface (32), the first base surface (31) is adjacent to the knife groove (311), and the plurality of anti-slip protrusions (322) of the anti-slip component (321) are arranged based on the second base surface (32), and the top of the anti-slip protrusions (322) is at the same height as the first base surface (31).

19. The anvil according to claim 17, wherein At least one group of second staple groove components is further arranged on the second base surface (32), and each group of the second staple groove components includes at least one row of second staple grooves (323), and each row of the second staple grooves (323) is composed of a plurality of second grooves (324) arranged at intervals along the extending direction of the knife groove (311), and a second partition (325) is formed between two adjacent second grooves (324), and the top of the second partition (325) is flush with the second base surface (32).

20. The anvil according to claim 17, wherein On the first base surface (31), multiple groups of the first staple groove components are arranged in parallel along the horizontal extending direction of the knife groove, and the first staple grooves (312) in two adjacent groups of the first staple groove components are staggered in the direction perpendicular to the extending direction of the knife groove (311).

21. The anvil according to claim 17 or 18, characterized in that, The anvil further includes fenders (42) symmetrically arranged on both sides of the anvil base body (3), and the fenders (42) are integrally formed with the anvil base body (3).

22. The staple cartridge according to claim 21, wherein, The anti-slip protrusion (322) has a target length, and the target length of the anti-slip protrusion (322) is the same as the maximum horizontal thickness value of the fender (42); the side surface of the anti-slip protrusion (322) is conical, and the cone has an arc-shaped top, so that the gap between adjacent anti-slip protrusions (322) gradually widens upward from the anvil surface.

23. The anvil according to claim 21, wherein, The bottom width of the anti-slip protrusion (322) is 0.5 mm to 1 mm, the bottom width of the gap between two adjacent anti-slip protrusions (322) is 0.3 mm to 0.6 mm, and the measurement directions of the bottom width of the anti-slip protrusion (322) and the bottom width of the gap between the two anti-slip protrusions (322) are parallel to the horizontal extension direction of the knife groove (311).

24. The staple cartridge according to claim 21, wherein, A first slope (43) is formed between the first base surface (31) and the second base surface (32), and the first slope (43) is provided at one end of the first base surface (31) away from the fender (42); the anvil further includes a bottom surface, and a second slope (44) is formed between the second base surface (32) and the bottom surface, and the second slope (44) is provided at one end of the second base surface (32) away from the fender (42).

25. A stapler, characterized in that, The stapler includes the anvil according to any one of claims 17-24 and a first cartridge structure (5), wherein the first cartridge structure (5) includes a plurality of cartridges (52) on the cartridge anastomosis surface (6), isolation grooves (53) between the plurality of cartridges (52), a knife groove (7) located at the middle position of the cartridge surface, and a plurality of anti-slip protrusions (51) located at the edge of the cartridge anastomosis surface (6); when the anvil is engaged with the first cartridge structure (5), the anti-slip protrusions (51) on the cartridge anastomosis surface (6) and the plurality of anti-slip protrusions (122) on the anvil are staggered in the horizontal direction.

26. The stapler according to claim 25, characterized in that, The knife groove (7) extends along the length direction and the horizontal direction of the cartridge anastomosis surface (6) of the first cartridge structure (5), the isolation grooves (53) are located between the plurality of cartridges (52), and the isolation grooves (53) extend from the knife groove (7) to the anti-slip protrusions (51).

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