A staple cartridge assembly and stapler

Abstract

The present application provides a kind of staple cartridge assembly and stapler, the staple cartridge assembly includes shell, anvil, staple cartridge, push-knife assembly and safety mechanism, safety mechanism is located in the anvil proximal region and has deformation part and blocking part, deformation part includes the connecting section connected on the anvil seat, the trigger section extending in the direction close to the staple cartridge and the deformation main body section between the two, blocking part is located in the knife gap and has the blocking position of hindering the movement of cutting knife and the avoidance position allowing the movement of cutting knife, the drive element is installed on the staple cartridge body, when the staple cartridge seat is not installed the staple cartridge body, blocking part is located in the blocking position;When the staple cartridge seat installs the staple cartridge body and is in closed state, drive element is abutted on trigger section and makes deformation main body section deformation and with blocking part moves from blocking position to avoidance position.The safety mechanism structure is simple, and it is directly set on the anvil, basically does not occupy additional space, can be applied to smaller diameter stapler.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a stapler assembly and a stapler. Background Technology

[0002] Laparoscopic staplers are commonly used instruments in laparoscopic surgery. The tip of the laparoscopic stapler has an openable and closable jaw. After the jaw is closed and clamps the tissue, pulling the firing handle will push the cutting blade and firing block forward. The cutting blade cuts the tissue, while the firing block pushes the staples upward and staples the corresponding tissue.

[0003] Most existing staplers have single-use staple cartridge components. To reduce surgical costs, it is essential to develop staplers with replaceable staple cartridges, meaning that after firing, the staple cartridge can be removed and replaced with a new one for continued use. However, during surgery, there is a possibility that the operator may push out the scalpel without the staple cartridge installed. In this case, the tissue will be cut, and since there are no staples to suture the tissue, serious problems such as bleeding and leakage of contents may occur.

[0004] Therefore, an insurance mechanism is needed to prevent the cutting blade from moving forward when the staple cartridge is not installed, thereby avoiding medical accidents. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a staple cartridge assembly and stapler with different safety structures.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A staple cartridge assembly includes a housing;

[0008] An anvil is fixedly installed at the far end of the housing. The anvil includes a pin seat and a pin plate. The pin plate has a cutting groove, and there is a cutting gap between the pin seat and the pin plate.

[0009] The staple cartridge is rotatably mounted at the distal end of the housing and has a closed state proximal to the anvil and an open state distal to the anvil. The staple cartridge includes a staple cartridge seat and a staple cartridge body detachably mounted on the staple cartridge seat.

[0010] A pusher assembly is slidably disposed on the housing along the housing axis, and includes a pusher rod and a cutting blade mounted at the distal end of the pusher rod, with one end of the cutting blade located within the tool travel gap;

[0011] The safety mechanism, located in the proximal region of the anvil, has a deformable portion and a blocking portion. The deformable portion includes a connecting section, a triggering section, and a deformable main body section with elastic deformation capability located between the connecting section and the triggering section. The connecting section is connected to the anvil, and the triggering section extends beyond the anvil towards the nail cartridge. The blocking portion is located in the cutting clearance and has a blocking position that hinders the movement of the cutting blade and a yielding position that allows the cutting blade to move.

[0012] A drive unit is installed on the staple cartridge body.

[0013] When the staple cartridge body is not installed on the staple cartridge holder, the blocking part is located in the blocking position;

[0014] When the staple cartridge body is installed on the staple cartridge holder and the staple cartridge is in a closed state, the driving member abuts against the trigger section and drives the deformation main body section to deform so that the blocking part moves from the blocking position to the avoidance position.

[0015] Preferably, when the driving member abuts against the trigger segment, the deformable main body segment and the blocking part together adhere to the inner wall of the anvil.

[0016] In some embodiments, an avoidance groove is provided on the inner wall of the anvil, and the connecting section is always located in the avoidance groove 211.

[0017] Furthermore, when the blocking part is located in the avoidance position, the blocking part and the deformable main body segment are also located in the avoidance groove; when the blocking part is located in the blocking position, the blocking part and the deformable main body segment are located outside the avoidance groove.

[0018] Preferably, the anvil plate has a receiving groove, the deformable main body section extends inclined towards the anvil cartridge and the end connecting the trigger section is located in the receiving groove.

[0019] Preferably, the blocking part is connected to the deformable body, and the middle part of the blocking part is bent and arched in a direction close to the anvil, and the degree of bending is consistent with that of the anvil.

[0020] Preferably, the projection of the blocking part and the cutting groove of the anvil plate onto the horizontal plane has an overlapping area.

[0021] Preferably, the deformable portion has two sets symmetrically arranged at the left and right ends of the blocking portion.

[0022] In some implementations, the insurance institution's projection onto the horizontal plane is H-shaped.

[0023] Preferably, the driving element is a spring clip, which causes the staple cartridge to always tend to open away from the anvil.

[0024] Preferably, the cutting blade includes a first crossbeam, a second crossbeam, and a cutting blade body located between the first and second crossbeams. The first crossbeam is located within the cutting clearance, and the second crossbeam is located within the staple cartridge. When the pusher assembly is fired and moves distally, the second crossbeam drives the staple cartridge to rotate, causing the staple cartridge assembly to close and clamp the target tissue. Preferably, when the blocking portion is in the blocking position, the blocking portion prevents the first crossbeam from moving distally.

[0025] The present invention also provides an anastomosis device, including the staple cartridge assembly as described above.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] This invention features a safety mechanism that prevents re-firing even when the staple cartridge is not installed, ensuring high safety. The safety mechanism has a simple structure and is directly mounted on the anvil, taking up virtually no extra space, making it suitable for smaller diameter staplers. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the staple cartridge assembly in Example 1, wherein the staple cartridge body is installed inside the staple cartridge holder and the staple cartridge is in the open state;

[0029] Figure 2 This is a schematic diagram of the staple cartridge assembly in Example 1, wherein the staple cartridge body is installed inside the staple cartridge seat and the staple cartridge is in a closed state, and the safety mechanism is in an avoidance position;

[0030] Figure 3 for Figure 2 A cross-sectional view of plane AA;

[0031] Figure 4 for Figure 3 Enlarged schematic diagram of section I;

[0032] Figure 5 for Figure 2 A cross-sectional view on the BB side;

[0033] Figure 6 The schematic diagram of the staple cartridge assembly in Example 1 is shown without the staple holder. The staple cartridge body is installed inside the staple holder and the staple cartridge is in a closed state, while the safety mechanism is in an avoidance position.

[0034] Figure 7This is a schematic diagram of the staple cartridge assembly in Example 1, wherein the staple cartridge body is not installed in the staple cartridge holder and the staple cartridge is in a closed state, and the safety mechanism is in a blocking position;

[0035] Figure 8 for Figure 7 Sectional view on the C-plane;

[0036] Figure 9 for Figure 8 Enlarged schematic diagram of Part II;

[0037] Figure 10 The schematic diagram of the staple cartridge assembly in Example 1 is shown without the staple holder, in which the staple cartridge body is not installed in the staple holder and the staple cartridge is in a closed state, and the safety mechanism is in the blocking position;

[0038] Figure 11 This is a schematic diagram of the anvil structure in Example 1;

[0039] Figure 12 for Figure 11 A structurally exploded diagram of the anvil in the diagram;

[0040] Figure 13 for Figure 12 A schematic diagram of the structure of the anvil;

[0041] Figure 14 for Figure 13 Sectional view on plane DD;

[0042] Figure 15 This is a schematic diagram of the insurance institution in Example 1; Figure 16 This is an exploded view of the staple cartridge structure in Example 1;

[0043] Figure 17 This is a schematic diagram of the staple cartridge body in Example 1;

[0044] Among them, 1. Shell;

[0045] 2. Anvil; 21. Anvil seat; 211. Clearance groove; 22. Anvil plate; 221. Anvil plate feed groove; 222. Receiving groove; 23. Feed clearance;

[0046] 3. Stamp cartridge; 31. Stamp cartridge holder; 311. Stamp cartridge holder tool path groove; 32. Stamp cartridge body; 321. Stamp cartridge body tool path groove; 33. Drive unit;

[0047] 4. Pusher assembly; 41. Pusher rod; 42. Cutting blade; 421. Cutting blade body; 422. Upper crossbeam; 423. Lower crossbeam;

[0048] 5. Insurance mechanism; 51. Deformation section; 511. Connecting section; 512. Deformation main body section; 513. Triggering section; 52. Blocking section. Detailed Implementation

[0049] The present invention will be further described below with reference to embodiments. However, the present invention is not limited to the following embodiments. The implementation conditions used in the embodiments can be further adjusted according to different requirements of specific applications, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in the various embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0050] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0051] In the description of this invention, it should be understood that "distal end" refers to the end of the instrument or component away from the operator, and "proximal end" refers to the end of the instrument or component closer to the operator; "axial direction" refers to the direction parallel to the line connecting the centers of the distal and proximal ends of the instrument or component; "inner" and "outer" are positions defined by distance relative to the center of the instrument or component, where "inner" is the position closer to the center of the instrument or component, and "outer" is the position away from the center of the instrument or component; "upper" and "lower" refer to the orientation of the instrument in its actual use or working state. The above description of directional terms is only for the convenience of describing the embodiments of this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0054] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0055] Example 1

[0056] An anastomosis device includes an instrument platform (not shown in the figures of this invention), a handle (not shown in the figures of this invention) movably connected to the instrument platform, and a staple cartridge assembly detachably connected to the distal end of the instrument platform. The instrument platform and the handle can adopt structures commonly used in the prior art, which will not be described in detail in this invention.

[0057] like Figures 1 to 17 As shown, the staple cartridge assembly includes a housing 1, an anvil 2 fixedly mounted at the distal end of the housing 1, a staple cartridge 3 rotatably mounted at the distal end of the housing 1, a pusher assembly 4 mounted inside the housing 1 and capable of moving along the axial direction of the housing 1, and a safety mechanism 5 mounted on the anvil 2. The staple cartridge 3 of this assembly can cooperate with the anvil 2 to clamp tissue, and it has a closed state close to the anvil 2 (see [reference]). Figures 2 to 10 ) and the open state away from the anvil 2 (see Figure 1 ).

[0058] The opening and closing of the staple cartridge 3 can be achieved by the movement of the pusher assembly 4. See details... Figure 11 and Figure 12 The anvil 2 includes an anvil seat 21 and an anvil plate 22. The anvil plate 22 has a feed groove (i.e., anvil plate feed groove 221) extending axially along the housing 1. A feed gap 23 exists between the anvil seat 21 and the anvil plate 22. See also Figure 16 and Figure 17 The staple cartridge 3 includes a staple cartridge seat 31 and a staple cartridge body 32 detachably mounted on the staple cartridge seat 31. The staple cartridge body 32 and the staple cartridge seat 31 are also provided with a knife-feeding groove (i.e., the staple cartridge body knife-feeding groove 321 and the staple cartridge seat knife-feeding groove 311) along the axial direction of the housing 1. The pusher assembly 4 includes a pusher rod 41 and a cutting blade 42. The cutting blade 42 is fixedly connected to or formed at the distal end of the pusher rod 41. The cutting blade 42 includes an upper crossbeam 422 (i.e., the first crossbeam mentioned above), a lower crossbeam 423 (i.e., the second crossbeam mentioned above) arranged opposite to each other, and a cutting blade body 421 located between the upper crossbeam 422 and the lower crossbeam 423. The cutting blade for cutting tissue is fixedly mounted on or formed on the cutting blade body 421. The upper crossbeam 422 is located within the cutting clearance 23 between the anvil seat 21 and the anvil plate 22 and mates with the surface opposite to the anvil surface of the anvil plate 22. The lower crossbeam 423 mates with the outer surface of the staple cartridge seat 31. Initially, the cutting blade 42 is located at the distal end of the anvil 2 and the staple cartridge 3. When the pusher assembly 4 is triggered by the handle, the pusher assembly 4 moves towards the distal end. At this time, the lower crossbeam 423 drives the staple cartridge seat 31 to rotate with the staple cartridge 3 towards the anvil 2, so that the staple cartridge assembly closes to clamp the target tissue. Figure 1For example, when the cutting blade 42 is fired towards the distal end (i.e. Figure 1 When the left side (as shown) moves, the staple cartridge 3 rotates upward (i.e., Figure 1 (The direction of the arrow shown).

[0059] In addition to controlling the rotation of the staple cartridge 3, the cutting blade 42 can also push the firing block located inside the staple cartridge body 32 to move distally, thereby ejecting the suture staples in the staple cartridge body 32 one by one from the staple cartridge 3, and then fixing them to the tissue with the cooperation of the anvil plate 22. The specific structure of the staple cartridge body 32 can be referred to the prior art.

[0060] During the process of removing the old staple cartridge body 32 and replacing it with a new one, the operator may accidentally push out the cutting blade 42 without the staple cartridge body 32 installed. In this case, the tissue will be cut. Since the staple cartridge body 32 is not installed, there are no staples to suture the tissue, which can lead to serious problems such as bleeding and leakage of contents. The safety mechanism 5 prevents the device from firing again without the staple cartridge body 32 installed. The specific structure and related principles of the safety mechanism 5 are explained below.

[0061] The safety mechanism 5 is installed in the proximal region of the anvil 2 and has a deformable part 51 and a blocking part 52. The deformable part 51 includes a connecting section 511, a triggering section 513, and a deformable main body section 512 with elastic deformation capability. The connecting section 511 is fixedly connected to the anvil 21, specifically to the inner wall of the anvil 21, and the connection method includes, but is not limited to, welding. One end of the triggering section 513 extends out of the anvil plate 22 towards the nail cartridge 3. The deformable main body section 512 is located between the connecting section 511 and the triggering end. The blocking part 52 is connected to the deformable main body section 512 and located in the cutting clearance 23. The blocking part 52 has a blocking position that hinders the movement of the cutting blade 42 and a clearance position that allows the cutting blade 42 to move. In order to trigger the safety mechanism 5, a drive member 33 is installed at the corresponding position of the staple cartridge body 32. When the staple cartridge seat 31 is not equipped with the staple cartridge body 32, the blocking part 52 is in the blocking position. When the staple cartridge seat 31 is equipped with the staple cartridge body 32 and the staple cartridge 3 is in the closed state, the drive member 33 abuts against the trigger section 513 to drive the deformation body section 512 to deform so as to move the blocking part 52 from the blocking position to the avoidance position.

[0062] Specifically, the blocking part 52 and the anti-nail plate cutting groove 221 have an overlapping area in the horizontal plane. When the trigger section 513 is not subjected to the abutting force from the drive member 33, the blocking part 52 blocks the forward path of the upper crossbeam 422, thereby preventing the cutting blade 42 from moving towards the distal end (see...). Figure 9 and Figure 10When the trigger segment 513 is subjected to a resisting force from the drive member 33, the deformable main segment 512 deforms and, together with the blocking part 52, adheres to the inner wall of the anvil seat 21, thereby avoiding the upper crossbeam 422, allowing the cutting blade 42 to move towards the distal end (see...). Figures 4 to 6 ).

[0063] The deformation section 51 has two sets symmetrically arranged at the left and right ends of the blocking section 52. The two sets of deformation sections 51 are located on both sides of the nail plate feed groove 221, and the blocking section 52 is located between the two deformation main body sections 512. The nail plate 22 has a receiving groove 222, and the deformation main body section 512 extends inclined towards the nail cartridge 3, with the end connecting to the trigger section 513 located in the receiving groove 222 (see...). Figure 10 Specifically, see Figure 15 The projection of the safety mechanism 5 onto the horizontal plane is H-shaped. The blocking part 52 and the deforming part 51 are integrally formed and can be made of elastic steel wire. To better fit the interior of the anvil 21, the middle portion of the blocking part 52 is curved and arched towards the anvil 21, and the degree of curvature is consistent with that of the anvil 21. Further, see... Figure 13 and Figure 14 An abutment seat 21 has an clearance groove 211 on its inner wall. The connecting section 511 is always located in the clearance groove 211. When the blocking part 52 is in the clearance position, the blocking part 52 and the deformable main body section 512 are also located in the clearance groove 211. When the blocking part 52 is in the blocking position, the blocking part 52 and the deformable main body section 512 are located outside the clearance groove 211, thus forming a blockage. Through the design of the clearance groove 211, the safety mechanism 5 occupies virtually no extra space, which is conducive to the miniaturization design of the stapler.

[0064] The driving component 33 is preferably a spring sheet. On the one hand, it can drive the deformation part 51 to deform, thereby driving the blocking part 52 to avoid it. On the other hand, the spring sheet can make the nail magazine 3 always have a tendency to open in the direction away from the anvil 2. That is, after the cutting blade 42 returns to its original position, the nail magazine 3 remains in the open state under the action of the spring sheet.

[0065] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A staple cartridge assembly, comprising a housing (1); Anvil (2), the anvil (2) is fixedly installed at the far end of the housing (1), the anvil (2) includes a nail seat (21) and a nail plate (22), the nail plate (22) is provided with a cutting groove, and there is a cutting gap 23 between the nail seat (21) and the nail plate (22); The staple cartridge (3) is rotatably mounted on the far end of the housing (1) and has a closed state close to the anvil (2) and an open state far from the anvil (2). The staple cartridge (3) includes a staple cartridge seat (31) and a staple cartridge body (32) detachably mounted on the staple cartridge seat (31). Pusher assembly (4), the pusher assembly (4) is slidably disposed on the housing (1) along the axial direction of the housing (1), and includes a pusher rod (41) and a cutting blade (42) installed at the distal end of the pusher rod (41), one end of the cutting blade (42) being located within the tool clearance (23); Insurance institutions (5), Its features are: The safety mechanism (5) is located in the proximal region of the anvil (2), and has a deformable part (51) and a blocking part (52). The deformable part (51) includes a connecting section (511) and a triggering section (513), and a deformable main body section (512) with elastic deformation capability located between the connecting section (511) and the triggering section (513). The connecting section (511) is connected to the anvil (21), and the triggering section (513) extends out of the anvil plate (22) toward the nail cartridge (3). The blocking part (52) is located in the cutting gap (23) and has a blocking position that hinders the movement of the cutting blade (42) and a clearance position that allows the cutting blade (42) to move. A drive unit (33) is installed on the staple cartridge body (32). When the staple cartridge holder (31) is not equipped with the staple cartridge body (32), the blocking part (52) is located in the blocking position; When the staple cartridge holder (31) is fitted with the staple cartridge body (32) and the staple cartridge (3) is in a closed state, the drive member (33) abuts against the trigger section (513) and drives the deformation body section (512) to deform so that the blocking part (52) moves from the blocking position to the avoidance position.

2. The staple cartridge assembly according to claim 1, characterized in that: When the drive member (33) abuts against the trigger section (513), the deformable main body section (512) and the blocking part (52) together adhere to the inner wall of the anvil (21).

3. The staple cartridge assembly according to claim 1 or 2, characterized in that: The anvil (21) has a relief groove (211) on its inner wall, and the connecting section (511) is always located in the relief groove (211). When the blocking part (52) is in the avoidance position, the blocking part (52) and the deformable main body section (512) are also located in the avoidance groove (211); When the blocking part (52) is in the blocking position, the blocking part (52) and the deformable main body section (512) are located outside the clearance groove (211).

4. The staple cartridge assembly according to claim 1, characterized in that: The anvil plate (22) has a receiving groove (222), and the deformable main body section (512) extends obliquely toward the nail cartridge (3) and the end connecting the trigger section (513) is located in the receiving groove (222).

5. The staple cartridge assembly according to claim 1, characterized in that: The blocking part (52) is connected to the deformable main body section (512), and the middle part of the blocking part (52) is bent and arched in the direction close to the anti-pin seat (21) and the degree of bending is consistent with that of the anti-pin seat (21). And / or, The projection of the blocking part (52) and the cutting groove of the anvil plate (22) on the horizontal plane has an overlapping area.

6. The staple cartridge assembly according to claim 1, characterized in that: The deformation part (51) has two sets symmetrically arranged at the left and right ends of the blocking part (52), and the two sets of deformation parts (51) are respectively arranged on both sides of the cutting groove of the anvil plate (22).

7. The staple cartridge assembly according to claim 1, characterized in that: The projection of the insurance institution (5) onto the horizontal plane is H-shaped.

8. The staple cartridge assembly according to claim 1, characterized in that: The drive element (33) is a spring clip, which causes the staple cartridge (3) to always tend to open away from the anvil (2).

9. The staple cartridge assembly according to claim 1, characterized in that: The cutting blade (42) includes a first crossbeam, a second crossbeam, and a cutting blade body (421) located between the first crossbeam and the second crossbeam. The first crossbeam is located within the cutting clearance (23), and the second crossbeam is located within the staple cartridge (3). When the pusher assembly (4) is fired and moves distally, the second crossbeam drives the staple cartridge (3) to rotate so that the staple cartridge assembly closes to clamp the target tissue. When the blocking part (52) is in the blocking position, the blocking part (52) prevents the first crossbeam from moving toward the distal end.

10. A stapler, characterized in that: Includes the staple cartridge assembly as described in any one of claims 1 to 9.

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