Staple cartridge assembly and stapler

Abstract

The embodiment of the present disclosure provides a staple cartridge assembly and a stapler, the staple cartridge assembly comprises a staple cartridge configured to accommodate an anastomosis staple, the staple cartridge has a staple cartridge end face; a patch comprising a first body part and a first connecting part, the first body part covers the staple cartridge end face, and the first connecting part is provided with a first connecting hole penetrating a surface thereof; a tubular connecting piece connected with the staple cartridge, an internal part of the tubular connecting piece is provided with a pushing device, and the pushing device is configured to make the anastomosis staple penetrate the staple cartridge end face; and a patch connecting piece sleeved on an external part of the tubular connecting piece and configured to stably connect the patch with the staple cartridge, wherein an external lateral wall of the staple cartridge is provided with a relief part configured to accommodate at least part of the patch connecting piece to reduce a gap between the first connecting part and the staple cartridge and avoid a patch surface wrinkle under external force to affect suturing and recovery of an anastomosis port.

Description

Technical Field

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

[0002] The application of staplers has greatly promoted the development of modern surgery and minimally invasive surgery, marking a milestone. Staplers can simultaneously cut and fix tissues with staples, and are widely used for cutting, suturing, or anastomosing organs such as the intestines, stomach, lungs, and pancreas. However, the rigidity of staples alone cannot completely prevent leakage and bleeding at the anastomosis site. This is because the staples are rigid structures that cannot perfectly match the flexibility of soft tissues, leading to leakage and bleeding at the staple holes. Furthermore, due to differences in the characteristics of soft tissues in different areas, some soft tissues, such as the lungs, have lower strength, potentially posing a risk of anastomotic tearing. To address these issues, anastomotic reinforcement patches can be used in conjunction with staplers. This allows the stapler to cut and close the wound while simultaneously fixing the reinforcement patch to the wound, sealing the staple holes, increasing wound strength, and thus preventing leakage and bleeding. Summary of the Invention

[0003] The purpose of this disclosure is to address the technical problems in related technologies by providing a stapler cartridge assembly and an anastomosis device. The specific solution is as follows:

[0004] The first aspect of this disclosure provides a staple cartridge assembly, comprising: a staple cartridge configured to receive staples, the staple cartridge having a staple cartridge end face; a patch including a first body portion and a first connecting portion, the first body portion covering the staple cartridge end face, the first connecting portion having a first connecting hole through its surface; a tubular connector connected to the staple cartridge, the tubular connector having a pushing device disposed inside, the pushing device being configured to allow the staples to pass through the staple cartridge end face; and a patch connector sleeved on the outside of the tubular connector, configured to stably connect the patch to the staple cartridge, wherein the outer wall of the staple cartridge has a clearance portion configured to accommodate at least a portion of the patch connector to reduce the gap between the first connecting portion and the staple cartridge.

[0005] In some embodiments, the clearance portion is disposed at one end of the outer wall of the staple cartridge near the end face of the staple cartridge, and in response to the patch being assembled to the end face of the staple cartridge, the projection of the clearance portion covers the projection of the first connecting hole in the radial direction of the staple cartridge.

[0006] In some embodiments, the patch connector includes a second connecting portion, which is an elastic tubular structure fitted onto the outer wall of the tubular connector, wherein the second connecting portion is elastic in the circumferential direction but not in the radial direction.

[0007] In some embodiments, the second connecting portion includes a second connecting hole disposed at one end of the second connecting portion away from the end face of the staple cartridge, wherein the inner diameter of the second connecting hole is equal to that of the first connecting hole.

[0008] In some embodiments, the patch connector further includes a connecting wire passing through the first connecting hole and the second connecting hole, configured to stably mount the patch to the staple cartridge end face.

[0009] In some embodiments, the depth of the clearance portion in the radial direction of the staple cartridge is at least 2.5 times the diameter of the connecting line.

[0010] In some embodiments, the staple cartridge assembly further includes an anti-detachment claw disposed inside the clearance portion and configured to restrict the movement direction of the connecting wire.

[0011] In some embodiments, the connecting line has only one degree of freedom in the axial direction of the staple cartridge.

[0012] In some embodiments, the length of the second connecting portion is greater than 1 / 2 of the length of the staple cartridge.

[0013] A second aspect of this disclosure provides an anastomosis device, comprising: an anvil assembly; and a staple cartridge assembly provided in the first aspect of this disclosure, the anvil assembly being used in conjunction with the staple cartridge assembly and configured to repair anastomosis.

[0014] Compared with related technologies, the above-described solutions of this disclosure have at least the following beneficial effects:

[0015] In the staple cartridge assembly disclosed herein, the patch and the staple cartridge are connected by a patch connector. The staple cartridge has a clearance portion for accommodating at least a portion of the patch connector, thereby ensuring that the patch fits snugly against the sidewall of the staple cartridge and reducing the gap between them. This prevents wrinkles on the patch surface from occurring under external force, which could affect the suturing and recovery of the anastomosis.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1This is a schematic diagram of the structure of a staple cartridge assembly according to an exemplary embodiment.

[0019] Figure 2 This is a schematic diagram illustrating the structure of a patch according to an exemplary embodiment.

[0020] Figure 3 This is a schematic diagram illustrating the structure of a patch after cutting, according to an exemplary embodiment.

[0021] Figure 4 This is a schematic diagram of a staple cartridge structure according to an exemplary embodiment.

[0022] Figure 5 This is a schematic diagram of the structure of a stapler according to an exemplary embodiment.

[0023] Figure 6 This is a cross-sectional view of a staple cartridge according to an exemplary embodiment.

[0024] Figure label:

[0025] 100 staple cartridge, 101 staple slot, 102 clearance part, 110 staple cartridge end face, 111 positioning post, 120 ring cutter, 130 shaft core, 131 third connecting part;

[0026] Patch 200, cutting position 201, hole 202, positioning hole 203, first connecting hole 204, body part 210, first end 211, second end 212, first connecting part 220;

[0027] 300mm tubular connector;

[0028] Patch connector 400, second connecting part 410, connecting wire 420, second connecting hole 401;

[0029] Staple cartridge assembly 1000, anvil assembly 2000, grip assembly 3000, stapler 4000. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this disclosure clearer, the disclosure will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise; “multiple” generally includes at least two, and other quantifiers are similarly intended.

[0032] It should be understood that although the terms first, second, third, etc., may be used to describe embodiments of this disclosure, these descriptions should not be limited to these terms. These terms are only used to distinguish the described objects. For example, first may also be referred to as second without departing from the scope of embodiments of this disclosure, and similarly, second may also be referred to as first. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] It should be understood that the term "and / or" as used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0035] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0037] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0038] In the relevant technologies of this field, most staple cartridges with patches are fixed by clamping components. Clamping devices designed for patches usually require high precision, have high production costs, and have cumbersome operation procedures. In addition, in clinical applications, due to the different patch sizes on the staple cartridge side, the clamping device may loosen the clamp when clamping different patches, which is not conducive to the stable coverage of the staple cartridge by the patch.

[0039] To address the aforementioned technical problems, this disclosure provides an autopsy cartridge assembly, comprising: an autopsy cartridge configured to accommodate staples, the autopsy cartridge having an end face; a patch comprising a first body portion and a first connecting portion, the first body portion covering the end face of the autopsy cartridge, the first connecting portion having a first connecting hole penetrating through its surface; a tubular connector connected to the autopsy cartridge, the tubular connector having a pushing device internally configured to allow the staples to penetrate the end face of the autopsy cartridge; and a patch connector sleeved on the outside of the tubular connector, configured to stably connect the patch to the autopsy cartridge, wherein the outer wall of the autopsy cartridge has a clearance portion configured to accommodate at least a portion of the patch connector to reduce the gap between the first connecting portion and the autopsy cartridge.

[0040] In the staple cartridge assembly disclosed herein, the patch and the staple cartridge are connected by a patch connector. The staple cartridge has a clearance portion for accommodating at least a portion of the patch connector, thereby ensuring that the patch fits snugly against the sidewall of the staple cartridge and reducing the gap between them. This prevents wrinkles on the patch surface from occurring under external force, which could affect the suturing and recovery of the anastomosis.

[0041] The optional embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0042] This disclosure provides a staple cartridge assembly 1000, such as... Figure 1 As shown, the staple cartridge assembly 1000 includes a staple cartridge 100, a patch 200, a tubular connector 300, and a patch connector 400. The patch 200 is assembled into the staple cartridge 100 and is used to repair the anastomosis. The tubular connector 300 is connected to the staple cartridge 100, and the patch connector 400 is sleeved on the outside of the tubular connector 300. The patch connector 400 is configured to connect with the patch 200 so that the patch 200 is stably assembled onto the staple cartridge end face 110 of the staple cartridge 100, preventing the patch 200 from detaching from the staple cartridge end face 110.

[0043] In some embodiments, such as Figure 2 As shown, the patch 200 includes a body portion 210 and a first connecting portion 220. The body portion 210 has an annular structure with a cutting position 201 and a perforation 202 on its surface. The cutting position 201 penetrates the perforation 202. In response to an external annular blade 120, the cutting position 201 is cut off, and the annular structure inside the cutting position 201 detaches from the body portion 210. Since the cutting position 201 penetrates the perforation 202, the remaining portion of the perforation 202 forms an open opening on the side facing the cutting position 201. When the body portion 210 is cut along the cutting position 201, the inner circumference of the perforation 202 and the inner circumference of the body portion 210 together form a toothed structure. The toothed structure can reduce the flow resistance at the anastomosis, allowing fluid to pass smoothly through the anastomosis. The first connecting portion 220 is connected to the outer ring of the body portion 210, and is configured to stably assemble the body portion 210 into the staple cartridge 100.

[0044] The serrated structure of the biomaterial patch 200 is expandable. At the anastomotic flow site, the added serrated structure forms a protective layer, enhancing the protection of the flow area. Compared to a ring-shaped reinforced patch after cutting, the serrated structure, combined with the elasticity of the tissue and material itself, allows for greater expansion at the anastomosis site when fluid flows through, facilitating fluid passage and preventing localized blockage.

[0045] In some embodiments, such as Figure 2As shown, the body portion 210 includes a plurality of perforations 202, each perforation 202 penetrating the surface of the body portion 210 and covering at least a portion of the cutting position 201, i.e., the cutting position 201 penetrating the perforations 202. Specifically, the patch 200 is used in conjunction with the staple cartridge 100 for assembly into the stapler 4000 to repair the anastomosis by firing the stapler 4000. When the patch 200 is assembled into the staple cartridge 100, the body portion 210 conforms to the staple cartridge end face 110 of the staple cartridge 100, and the first connecting portion 220 covers at least a portion of the sidewall of the staple cartridge 100, configured such that the body portion 210 can accurately cover the edge of the staple cartridge end face 110.

[0046] In response to the annular blade 120 of the staple cartridge 100 cutting the patch 200 along the cutting position 201, the inner ring edge of the body portion 210 is serrated, and the cut patch 200 is as follows: Figure 3 As shown, the serrated structure can disrupt the boundary layer formed by fluid at the edge of the annular inner ring. The presence of the boundary layer increases the resistance to fluid flow, while the serrated structure destabilizes the boundary layer, thereby reducing flow resistance and facilitating fluid passage. When fluid passes through the anastomosis port, the serrated patch 200 can increase the fluid flow area, allowing more fluid to pass through to a certain extent, especially when the fluid flow rate is large, helping to alleviate congestion and avoid poor flow.

[0047] In some embodiments, such as Figure 2 As shown, in the radial direction of the annular structure of the patch 200, the pore portion 202 has a first end 211 adjacent to the inner ring and a second end 212 adjacent to the outer ring.

[0048] In some embodiments, the width of the first end 211 in the circumferential direction of the patch 200 may be the same as or different from the width of the second end 212; preferably, the width of the first end 211 in the circumferential direction of the patch 200 is greater than the width of the second end 212; or the width of the first end 211 in the circumferential direction of the patch 200 is less than the width of the second end 212.

[0049] In some embodiments, when the first end 211 cuts the body portion 210 along the cutting position 201 in the circumferential direction of the annular structure of the patch 200, the width of the first end 211 is smaller than the width of the second end 212. The toothed structure formed by the inner ring of the body portion 210 is a shape structure that gradually narrows from the base to the tooth tip. This toothed structure makes it easier to reduce the radial force at the edge of the anastomosis, making the fluid more stable and smooth when passing through the anastomosis, and less prone to blockage.

[0050] In some embodiments, the distance from the cut position 201 to the second end 212 is greater than half the distance from the cut position 201 to the outer ring edge. The distance from the cut position 201 to the outer ring edge of the body portion 210 is the depth to which the pore portion 202 can expand for the anastomosis. The greater the distance from the cut position 201 to the outer ring edge of the body portion 210, the greater the flow resistance can be reduced for the fluid passing through the anastomosis. If the distance from the cut position 201 to the outer ring edge of the body portion 210 is too small, when the fluid passes through the anastomosis, the inner ring portion of the body portion 210 will still cause significant resistance to the fluid due to the small degree of expansion, affecting the continuous flow of the fluid.

[0051] In some embodiments, the body portion 210 further includes a positioning hole 203, which is disposed through the body portion 210 and configured to accurately install the patch 200 and the staple cartridge 100. The diameter of the positioning hole 203 is 0.1-2.5 mm, preferably 0.2-2.4 mm. If the diameter of the positioning hole 203 is too small, it is easy to encounter problems with alignment during patch 200 assembly; if the diameter of the positioning hole 203 is too large, it is easy to encounter problems such as affecting the setting of the orifice portion 202 or affecting the firing of the staples, thus failing to ensure the normal operation of the stapler 4000.

[0052] The biomaterials used in the patch 200 described in this application are selected from biodegradable polymer materials or biodegradable animal-derived biomaterials. Preferably, the biodegradable animal-derived biomaterials include dermal matrix, pericardium, peritoneum, bladder submucosa, or small intestinal submucosa treated with immunogen removal, or combinations of these materials, such as compositions obtained by lamination, weaving, or embedding. Decellularized small intestinal submucosa matrix materials are preferred. The biodegradable polymer materials may be selected from PGA, PLA, or PLGA, or combinations of these materials, such as compositions obtained by lamination, weaving, or embedding.

[0053] In some embodiments, such as Figure 1 , Figure 4 As shown, one end of the staple cartridge 100 has a staple cartridge end face 110, on which a plurality of staple placement slots 101 are provided. Parts of the staple placement slots 101 are open at the staple cartridge end face 110 to accommodate staples. In response to the firing of the stapler 4000 having the staple cartridge assembly 1000, the staples extend out from the staple placement slots 101.

[0054] Specifically, when the patch 200 is used in conjunction with the staple cartridge 100, the patch 200 covers the end face of the staple cartridge 100. In response to the patch 200 being assembled into the staple cartridge 100, the patch 200 covers the staple placement groove 101. After the stapler 4000 is fired, the staples extend from the staple placement groove 101. Furthermore, the staples are fastened to the anvil end face of the stapler 4000, forming a "B-shaped" structure, thus achieving suturing of the patch 200 with the anastomosis.

[0055] In some embodiments, the staple cartridge end face 110 is provided with a positioning post 111, which is used to cooperate with the positioning hole 203 to make the patch 200 stably connected to the staple cartridge end face 110. In the circumferential direction of the staple cartridge 100, the positioning post 111 is disposed between any two staple placement slots 101 adjacent to the outer ring.

[0056] In some embodiments, the height of the positioning post 111 is 0.2-0.5mm. If the height of the positioning post 111 is greater than 0.5mm, the stapler 4000 may clamp the anastomosis site too tightly in some areas. In addition, it may cause the stapler 4000 to loosen its grip during the clamping process. If the height of the positioning post 111 is less than 0.2mm, the patch 200 may be difficult to assemble into the staple cartridge 100. In addition, it may cause the patch 200 to shift during the clamping process.

[0057] In some embodiments, the width of the aperture 202 in the tangential direction of the patch 200 is not less than 0.1 mm. The width of the aperture 202 is set such that the aperture 202 does not cover the staple placement groove 101 of the staple cartridge end face 110. If the aperture 202 covers the staple placement groove 101, after the stapler 4000 is fired, the tissue at the staple joint and the overall thickness of the patch will be uneven, posing a risk of poor staple formation.

[0058] In some embodiments, in order to ensure that the inner ring of the cut patch 200 has a complete serrated structure, the pore portion 202 needs to avoid the pin groove 101. Therefore, in the circumferential direction of the body portion 210, the spacing between the plurality of pore portions 202 is 0.2-7mm, and the distance between two adjacent pore portions 202 can at least accommodate one matching pin.

[0059] If the distance between the multiple pores 202 is less than 0.2 mm, the space between the pores 202 is insufficient to accommodate a staple, and the staples cannot be stapled. If the distance between the multiple pores 202 is greater than 7 mm, after the staple is fired, the staple position will be too far from the position of the pore 202, which may result in a loose pore.

[0060] In some embodiments, the staple cartridge assembly 1000 further includes an annular blade 120 disposed inside the staple cartridge 100 and movable in the height direction of the staple cartridge 100. The annular blade 120 has a retracted position and a released position relative to the staple cartridge 100. Before the staples are fired, the annular blade 120 is normally in the retracted position; in response to the firing of the staples, the annular blade 120 switches from the retracted position to the released position. When the annular blade 120 is in the released position, it cuts a portion of the human tissue and the pore portion 202 at the anastomosis site along the cutting position 201, causing the remaining portion of the pore portion 202 to form an open opening facing the cutting position 201. When fluid passes through the anastomosis site, the serrated structure formed by the inner ring of the body portion 210 and the edge of the pore portion 202 increases the fluid flow area, allowing more fluid to pass through to a certain extent, especially when the fluid flow rate is large, helping to alleviate congestion and avoid poor flow.

[0061] In some embodiments, such as Figure 1 , Figure 5 As shown, the staple cartridge assembly 1000 further includes a tubular connector 300, which is connected to the staple cartridge 100. The tubular connector 300 has an internal pushing device configured to push the staples so that they penetrate the patch 200 on the end face 110 of the staple cartridge. A patch connector 400 is externally provided to the tubular connector 300. The patch connector 400 includes a second connecting portion 410, which is a flexible tubular structure. Under its own elasticity, the second connecting portion 410 fits tightly against the tubular connector 300. The patch 200 can be fixed to the end of the staple cartridge 100 via the second connecting portion 410. The second connecting part 410 is elastic in the circumferential direction but not in the radial direction, so that it is not easy to deform in the length direction of the staple cartridge assembly 1000. In the circumferential direction of the staple cartridge assembly 1000, the second connecting part 410 has an elastic fixing effect on the tubular connector 300.

[0062] In some embodiments, to ensure a stable connection between the second connecting portion 410 and the staple cartridge 100, the length of the second connecting portion 410 in the axial direction of the staple cartridge 100 is greater than 1 / 2 and less than 2 / 3 of the length of the staple cartridge 100. If the second connecting portion 410 is too long, it will affect the assembly of the patch 200 and the staple cartridge 100; if the second connecting portion 410 is too short, it will cause an unstable connection between the second connecting portion 410 and the staple cartridge 100.

[0063] In some embodiments, the patch connector 400 further includes a connecting wire 420; the first connecting portion 220 is provided with a first connecting hole 204, and the surface of the second connecting portion 410 is provided with a second connecting hole 401. When the patch 200 is assembled to the staple cartridge 100, the body portion 210 covers the staple cartridge end face 110, and the first connecting portion 220 covers at least a portion of the side wall of the staple cartridge 100. At this time, the connecting wire 420 can pass through the first connecting hole 204 and the second connecting hole 401 to connect the patch 200 to the patch connector 400, thereby achieving the assembly of the patch 200 and the staple cartridge 100. Specifically, the connecting wire 420 passes through the first connecting hole 204 and the second connecting hole 401 to connect the patch 200 to the second connecting portion 410, thereby achieving the assembly of the patch 200 and the staple cartridge 100. The second connecting hole 401 is located at the end of the second connecting part 410 away from the staple cartridge end face 110, and the inner diameter of the second connecting hole 401 is equal to that of the first connecting hole 204. When the connecting wire 420 assembles the patch 200 with the staple cartridge 100, the first connecting hole 204 and the second connecting hole 404 are on the same straight line in the axial direction of the staple cartridge 100. At this time, the connecting wire 420 required to connect the patch 200 and the patch connector 400 is the shortest and is less likely to get tangled with the staple cartridge 100.

[0064] In some embodiments, the outer wall of the staple cartridge 100 is provided with a clearance portion 102, configured to accommodate at least a portion of the patch connector 400 to reduce the gap between the first connecting portion 220 and the staple cartridge 100. Specifically, the clearance portion 102 is located at one end of the outer wall of the staple cartridge 100 adjacent to the staple cartridge end face 110. In response to the patch 200 being assembled onto the staple cartridge end face 110, the projection of the clearance portion 102 in the radial direction of the staple cartridge 100 covers the projection of the first connecting hole 204. When the connecting line 420 stably assembles the patch 200 onto the staple cartridge end face 110, at least a portion of the connecting line 420 is located within the clearance portion 102. At this time, the gap between the first connecting portion 220 and the outer wall of the staple cartridge 100 is smaller. If the outer wall of the fixed cartridge position does not have a relief part 102, when the patch 200 is assembled on the end face 110 of the cartridge, the connecting line 420 will be clamped between the first connecting part 220 of the patch 200 and the outer wall of the cartridge 100, which will increase the gap between the patch 200 and the outer wall of the cartridge 100 and affect the connection stability between the patch 200 and the cartridge 100. On the other hand, the increased gap will also cause wrinkles on the surface of the body part 210 under the action of external force. For example, when the ring cutter 120 cuts the patch 200, due to the gap between the first connecting part 220 and the side wall of the cartridge 100, the cutting action of the ring cutter 120 will easily form elliptical cutting marks or suture wrinkles inside the patch 200. Such uneven cut marks are not conducive to the suturing and restoration of the anastomosis.

[0065] In some embodiments, in the radial direction of the staple cartridge 100, the depth of the clearance portion 102 is at least 2.5 times the diameter of the connecting line 420. The clearance portion 102 is configured such that when the connecting line 420 passes through the clearance portion 102, the space of the clearance portion 102 is sufficient to accommodate the connecting line 420, so that the first connecting portion 220 fits tightly against the outer wall of the staple cartridge 100. This avoids wrinkles at the anastomosis suture due to excessive gap between the first connecting portion 220 and the staple cartridge 100, which would affect the anastomosis suture and prolong the recovery time.

[0066] In some embodiments, the clearance portion 102 is further provided with an anti-disengagement claw, configured to restrict the movement direction of the connecting line 420. The connecting line 420 passes through the middle of the anti-disengagement claw, so that the connecting line 420 has only one degree of freedom in the axial direction of the staple cartridge 100.

[0067] Specifically, the anti-detachment claw can be a ring-shaped anti-detachment claw, consisting of multiple claws connected by a connecting structure to form a ring structure, with each claw having at least one claw facing the center of the ring structure. The connecting line 420 passes through the interior of the anti-detachment claw to prevent the connecting line 420 from moving in the opposite direction. When the connecting line 420 assembles the patch 200 onto the staple cartridge end face 110, the connecting line 420 can only move from the staple cartridge end face 110 toward the second connecting part 410. The anti-detachment claw restricts the degree of freedom of the connecting line 420, further ensuring that the patch 200 is stably assembled onto the staple cartridge 100.

[0068] In some embodiments, the outer wall of the staple cartridge 100 further includes a lead groove, which is disposed on the outer wall of the staple cartridge 100 and extends along the height direction of the staple cartridge 100, configured to guide the connecting wire 420. When the connecting wire 420 connects the patch 200 to the second connecting portion 410, at least a portion of the middle part of the connecting wire 420 passes through the inside of the lead groove, preventing the connecting wire 420 from wrapping around the staple cartridge 100 or covering the end face 110 of the staple cartridge. If the connecting wire 420 covers the end face 110 of the staple cartridge, after the stapler 4000 is fired, there will be excess connecting wire 420 stapled on the stapled surface of the anastomosis, which may obstruct the anastomosis and cause fluid flow obstruction at the anastomosis, which may lead to embolism and local tissue necrosis in severe cases.

[0069] In some embodiments, the connecting line 420 can be a single line or a double line. The type of connecting line 420 and the connection method used do not affect the application of the staple cartridge assembly 1000 provided in this disclosure in the stapler 4000, as long as the connecting line 420 does not wrap around the staple cartridge 100 or cover the staple cartridge end face 110.

[0070] In some embodiments, the anvil assembly 2000 and the staple cartridge assembly 1000 of the stapler 4000 are detachably connected, having a detached state and an installed state. Specifically, in the installed state, the anvil assembly 2000 and the staple cartridge assembly 1000 have a first state and a second state. When the anvil assembly 2000 and the staple cartridge assembly 1000 are in the first state, the anvil is separated from the staple cartridge 100; when the anvil assembly 2000 and the staple cartridge assembly 1000 are in the second state, the anvil is attached to the staple cartridge 100. At this time, the staples in the staple cartridge 100 can be fired to repair the anastomosis with the patch 200.

[0071] In some embodiments, such as Figure 5 , Figure 6As shown, the staple cartridge assembly 1000 further includes a shaft core 130. The inner wall of the shaft core 130 is provided with a third connecting portion 131 adapted to connect with the central shaft body of the anvil assembly 2000. When the anvil assembly 2000 and the staple cartridge assembly 1000 switch from a first state to a second state, the central shaft body connects with the third connecting portion 131. This allows the anvil to fit snugly against the staple cartridge 100.

[0072] In some embodiments, the annular blade 120 of the staple cartridge 100 is disposed outside the shaft core 130 and moves along the length of the shaft core 130. The annular blade 120 has a storage position and a working position relative to the staple cartridge assembly 1000. When the anvil assembly 2000 and the staple cartridge assembly 1000 are in the installed state, the annular blade 120 is retracted into the staple cartridge 100, as shown below. Figure 6 As shown, the annular blade 120 is in the retracted position at this time; when the anvil assembly 2000 and the staple cartridge assembly 1000 are in the second state, the stapler 4000 can be activated to switch the annular blade 120 from the retracted position to the working position. In the working position, the end of the annular blade 120 extends out of the staple cartridge end face 110 and cuts the patch 200 so that part of the patch 200 is separated from the stapler 4000.

[0073] In some embodiments, the stapler 4000 further includes a gripping assembly 3000, which includes a firing handle and a safety pin. When the anvil assembly 2000 and the staple cartridge assembly 1000 are in the second state, the stapler 4000 can be fired. Before firing the stapler 4000, the safety pin needs to be disengaged from the firing handle. Furthermore, the firing handle is pressed firmly to move the staple cartridge 100 towards the front end of the stapler 4000, simultaneously ejecting the staples and the circular blade 120. The staples protrude from the staple cartridge end face 110 and penetrate the patch 200. The tip of the staple contacts and deforms with the anvil groove at the anvil end, achieving suturing of the anastomosis.

[0074] The specific structure, working principle, and beneficial effects of the staple cartridge assembly and stapler provided in this disclosure can be found in any of the above embodiments, and will not be repeated here.

[0075] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0076] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A staple cartridge assembly, characterized in that, include: A staple cartridge, configured to receive staples, the staple cartridge having a staple cartridge end face; The patch includes a first body portion and a first connecting portion, the first body portion covering the end face of the staple cartridge, and the first connecting portion having a first connecting hole through its surface; A tubular connector is connected to the staple cartridge, and a pushing device is provided inside the tubular connector. The pushing device is configured to allow the staples to pass through the end face of the staple cartridge. A patch connector, sleeved on the outside of the tubular connector, is configured to ensure a stable connection between the patch and the staple cartridge. The outer wall of the staple cartridge is provided with a clearance portion. In response to the patch being assembled on the end face of the staple cartridge, the projection of the clearance portion in the radial direction of the staple cartridge covers the projection of the first connecting hole, and is configured to accommodate at least a portion of the patch connector to reduce the gap between the first connecting portion and the staple cartridge.

2. The staple cartridge assembly according to claim 1, characterized in that, The clearance portion is located on one end of the outer wall of the staple cartridge, near the end face of the staple cartridge.

3. The staple cartridge assembly according to claim 1, characterized in that, The patch connector includes: The second connecting part is an elastic tubular structure, which is sleeved on the outer wall of the tubular connector. The second connecting part is elastic in the circumferential direction but not in the radial direction.

4. The staple cartridge assembly according to claim 3, characterized in that, The second connecting part includes: The second connecting hole is located at the end of the second connecting portion away from the end face of the staple cartridge, and the inner diameter of the second connecting hole is equal to that of the first connecting hole.

5. The staple cartridge assembly according to claim 4, characterized in that, The patch connector also includes: A connecting wire passes through the first connecting hole and the second connecting hole, configured to stably assemble the patch onto the end face of the staple cartridge.

6. The staple cartridge assembly according to claim 5, characterized in that, In the radial direction of the staple cartridge, the depth of the clearance portion is at least 2.5 times the diameter of the connecting line.

7. The staple cartridge assembly according to claim 5, characterized in that, Also includes: An anti-detachment claw is disposed inside the avoidance part and configured to restrict the movement direction of the connecting line.

8. The staple cartridge assembly according to claim 7, characterized in that, The connecting line has only one degree of freedom along the axial direction of the staple cartridge.

9. The staple cartridge assembly according to claim 3, characterized in that, The length of the second connecting part is greater than 1 / 2 of the length of the staple cartridge.

10. A stapler, characterized in that, include: Anvil assembly; The staple cartridge assembly according to any one of claims 1-9, wherein the anvil assembly is used in conjunction with the staple cartridge assembly and configured to repair anastomosis.

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