A self-adapting staple closing height abutment and stapler thereof

Abstract

The utility model belongs to the field of anastomat, specifically relates to a kind of self-adapting stapling nail closing height's nail abutment and its anastomat, wherein self-adapting stapling nail closing height's nail abutment includes nail abutment body and several anastomotic slots set on nail abutment body;The slot bottom of at least one anastomotic slot can be elastically moved along the slot depth direction of anastomotic slot, so that stapling nail can be closed height adaptively when carrying out anastomosis according to the characteristics of the tissue to be sutured.The self-adapting stapling nail closing height's nail abutment provided by the utility model, the slot bottom of anastomotic slot can be elastically moved, when stapling nail extrusion penetrates tissue, the slot bottom of anastomotic slot can be elastically contracted or rebound along depth direction, and slot bottom elastic movement amount real-time matching tissue characteristics.At this time, the elastic force of the elastic movement of the slot bottom of anastomotic slot, so that elastic force and tissue resistance are naturally balanced, and stapling nail forming height accurately adapts the compression characteristics of current tissue.

Description

Technical Field

[0001] This utility model belongs to the field of anastomosis devices, specifically relating to an anvil seat with adaptive staple closing height and anastomosis device thereof. Background Technology

[0002] Anastomosing devices are medical devices used to replace manual suturing. Their main working principle is to use titanium staples to cut or anastomose tissue, similar to a stapler.

[0003] Traditional stapler technology has long been limited by multi-specification stapler cartridge systems, whose core drawback lies in its heavy reliance on surgeon experience to select the closure height. Subjective judgment of tissue thickness during surgery easily leads to misselection risks, resulting in serious complications such as anastomotic leakage or tissue damage. Frequent stapler cartridge changes not only prolong surgical time but also exacerbate the rate of operational errors under minimally invasive conditions. Medical institutions are forced to maintain a complex stapler cartridge inventory system, resulting in resource waste and management burden. Existing improvement solutions typically involve modifications to the stapler cartridge itself, but these are often structurally complex and have high manufacturing costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an anvil seat and its stapler that can adapt to the closing height of the staples.

[0005] This utility model provides an anvil seat with adaptive closure height of the staple, including an anvil seat body and a plurality of matching grooves disposed on the anvil seat body; At least one anastomosis groove bottom can move elastically along the groove depth direction, so that the staple can adapt the closing height according to the characteristics of the tissue to be sutured during anastomosis. Furthermore, the anastomosis groove is integrally formed, and the entire anastomosis groove can move elastically along the groove depth direction to achieve elastic movement of its bottom along the groove depth direction.

[0006] Furthermore, the anvil of this adaptive staple closing height also includes n1 staple felt plates, each staple felt plate is provided with n2 matching grooves, where n1≥1 and n2≥1; The nail felt plate is slidably mounted on the anvil body along the groove depth direction of the matching groove; An elastic element is provided between the bottom of the nailing felt plate and the anvil body, which allows the bottom of the mating groove to move elastically along the groove depth direction.

[0007] Furthermore, the elastic element consists of n3 springs arranged between the bottom of the nail felt plate and the anvil body, where n3 ≥ 1.

[0008] Furthermore, the bottom of the nail felt plate and the anvil body are provided with corresponding fitting grooves, and the two ends of the spring are respectively fitted into the fitting grooves of the nail felt plate and the anvil body.

[0009] Furthermore, the anvil body is provided with a sliding mounting groove for the nail felt plate to slide; The nail felt board is slidably mounted on the sliding mounting groove.

[0010] Furthermore, a flexible connection structure is provided between the nail felt plate near the outer side of the anvil body and the outer side of the anvil body; When n1≥2, a flexible connection structure is provided between two adjacent nail felt boards.

[0011] Furthermore, the flexible connection structure is made of biocompatible elastic materials.

[0012] This utility model also provides a stapler, including the aforementioned anvil seat with adaptive staple closing height.

[0013] Furthermore, the stapler's staple cartridge contains staples of a single specification pre-installed.

[0014] The beneficial effect of this invention is that the anvil seat with adaptive staple closure height provided by this invention allows the bottom of the anastomosis groove to move elastically. When the staple penetrates the tissue, the bottom of the anastomosis groove can elastically contract or rebound along the depth direction, and the amount of elastic movement of the groove bottom matches the tissue characteristics in real time. Taking the tissue thickness as an example, thicker tissue compresses the groove bottom deeper (increasing the closure height), while thinner tissue compresses it shallower (decreasing the closure height). At this time, the elastic force of the elastic movement of the groove bottom naturally balances the elastic force and tissue resistance, so that the staple forming height is accurately adapted to the compression characteristics of the current tissue.

[0015] The adaptive stapler closure height anvil provided by this invention can be directly applied to various existing staplers. This allows the stapler to address the clinical need to select different staple cartridge sizes based on different tissue characteristics, transforming a specific size staple cartridge into a "universal" cartridge. It also eliminates the need to pause surgery to change staple cartridges in situations where different sizes need to be cut during operation, shortening operation time and reducing the need for inventory of various instrument sizes. Furthermore, it increases the adaptability of the stapler, enabling it to respond in real-time to local thickness changes in heterogeneous tissues such as edema and fibrosis, achieving uniform anastomotic pressure distribution. Attached Figure Description Appendix Figure 1 This is a schematic diagram of the anvil seat for the adaptive closure height of the sew nail in this utility model; Appendix Figure 2 This is a top view of the anvil seat for the adaptive closure height of the sew nail in this utility model; Appendix Figure 3 For the appendix Figure 2 Sectional view along line AA; Appendix Figure 4 For the appendix Figure 3 A magnified view of a section at point B in the middle; Appendix Figure 5 This is a schematic diagram showing one of the closed height states of the center seam staple of this utility model; Appendix Figure 6 This is a schematic diagram showing the second state of the closed height of the center seam nail in this utility model; Appendix Figure 7 This is a schematic diagram showing the state of the three-dimensional closed height of the seam staple in this utility model.

[0016] In the figure, 1-Anvil seat body; 11-Sliding mounting groove; 12-Anvil surface; 2-Matching groove; 3-Nail felt plate; 4-Elastic element; 5-Sewing nail. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] As attached Figure 1 -Appendix Figure 7 As shown, this utility model provides an anvil seat with adaptive closure height of the staple, including an anvil seat body 1 and a plurality of matching grooves 2 disposed on the anvil seat body 1; At least one anastomosis groove 2 has a groove bottom that can move elastically along the groove depth direction, so that the staple 5 can adapt the closing height according to the characteristics of the tissue to be sutured when anastomosing.

[0023] The characteristics of a tissue include its thickness, its hierarchical structure (e.g., the intestinal wall contains a mucosal layer / muscular layer / serosa), its density, and its mass per unit volume (e.g., adipose tissue < muscle tissue < fibrotic tissue). At least one of these characteristics is required, or a combination of multiple characteristics may be present. These characteristics affect the mechanical properties of the tissue being clamped, such as compressibility, elastic modulus, and tear resistance.

[0024] The anvil seat for adaptive staple closure height provided by this utility model has an elastically movable groove bottom 2. When the staple 5 penetrates the tissue, the groove bottom of the groove 2 can elastically contract or rebound along the depth direction. The amount of elastic movement of the groove bottom matches the tissue characteristics in real time. Taking only the tissue thickness as an example, thicker tissue compresses the groove bottom deeper (increasing the closure height), while thinner tissue compresses it shallower (decreasing the closure height). At this time, the elastic force of the elastic movement of the groove bottom of the groove 2 naturally balances the elastic force and tissue resistance, so that the forming height of the staple 5 is accurately adapted to the compression characteristics of the current tissue.

[0025] The adaptive stapler closure height anvil provided by this invention can be directly applied to various existing staplers. This allows the stapler to address the clinical need to select different staple cartridge sizes based on different tissue characteristics, transforming a specific size staple cartridge into a "universal" cartridge. It also eliminates the need to pause surgery to change staple cartridges in situations where different sizes need to be cut during operation, shortening operation time and reducing the need for inventory of various instrument sizes. Furthermore, it increases the adaptability of the stapler, enabling it to respond in real-time to local thickness changes in heterogeneous tissues such as edema and fibrosis, achieving uniform anastomotic pressure distribution. In one embodiment, the anastomosis groove 2 is integrally formed, and the entire anastomosis groove 2 can be elastically moved along the groove depth direction to realize the elastic movement of its bottom along the groove depth direction.

[0026] In this embodiment, the entire anastomosis groove 2 can be moved, ensuring its integrity. On one hand, this allows the anastomosis groove 2 to possess the capabilities of a conventional anastomosis groove 2, such as the groove sidewall participating in deformation. When the junction of thick and thin tissues is located in the bending area of ​​the staple leg, the elastic support of the sidewall prevents the staple leg from twisting, ensuring its shaping effect on the staple 5. On the other hand, it avoids the problem of tissue jamming that could occur if the groove sidewall and bottom wall of the anastomosis groove 2 could move relative to each other. Furthermore, the overall structure of the anastomosis groove 2 simplifies the structure and facilitates manufacturing.

[0027] In another embodiment, the groove sidewall of the anastomosis groove 2 is rigidly connected to the anastomosis seat body 1, and only the groove bottom of the anastomosis groove 2 can move elastically on the anastomosis seat body 1 and move relative to the groove sidewall of the anastomosis groove 2. In this case, the support stability of the anastomosis surface 12 (groove opening side of the anastomosis groove 2) of the anastomosis seat body 1 can be guaranteed, but the structure is relatively complex.

[0028] In one embodiment, it also includes n1 nail felt plates 3, each nail felt plate 3 having n2 matching grooves 2, wherein n1≥1 and n2≥1; When n1≥2, the n1 nail felt plates 3 can be arranged longitudinally, laterally, or in a rectangular array, depending on the needs. Furthermore, each nail felt plate 3 can be equipped with n2 matching grooves 2 as needed, meaning the size of each nail felt plate 3 can be selected according to requirements.

[0029] The nail felt plate 3 is slidably disposed on the anvil body 1 along the groove depth direction of the matching groove 2. At this time, a directional sliding pair is formed between the bottom surface of the nail felt plate 3 and the anvil body 1 to ensure that the elastic movement is strictly along the groove depth direction and to eliminate the bending deviation of the nail leg caused by lateral movement. An elastic element 4 is provided between the bottom of the nailing felt plate 3 and the nail seat body 1. The elastic element 4 allows the bottom of the matching groove 2 to move elastically along the groove depth direction of the matching groove 2.

[0030] In this embodiment, each anastomosis groove 2 can be tightly zoned and controlled, and each staple plate 3 independently supports the elastic element 4, achieving matching of tissue characteristics. When there is a sudden change in thickness in the anastomosis area (such as the vascular / fat junction), the corresponding staple plate can autonomously adjust its height to avoid poor closure caused by forced uniform pressure. In addition, by pre-configuring the characteristics of each elastic element 4, a preset pressure gradient can be provided for all anastomosis grooves 2, such as using a high elastic coefficient elastic element 4 in the central area to enhance support, and using a low elastic coefficient elastic element 4 in the edge area to avoid soft tissue damage. Furthermore, when multiple staple plates 3 are provided, the multiple staple plates 3 also have a redundancy safety effect. When a single staple plate 3 becomes stuck, the remaining staple plates 3 can maintain basic functions to avoid surgical failure.

[0031] In one embodiment, the elastic element 4 consists of n3 springs arranged between the bottom of the nail felt plate 3 and the nail seat body 1, where n3 ≥ 1. In this embodiment, the spring structure is simple and reliable. In other embodiments, the elastic element 4 can also be made of a flexible elastic material.

[0032] In one embodiment, the bottom of the nail felt plate 3 and the anvil body 1 are provided with corresponding fitting grooves, and the two ends of the spring are respectively fitted into the fitting grooves of the nail felt plate 3 and the anvil body 1. In this embodiment, the cooperation between the fitting groove and the spring can prevent the spring from shifting laterally and ensure that the nail felt plate 3 can move along the groove depth direction under the impact of firing. It can also simplify the installation of the spring and improve the assembly efficiency.

[0033] In one embodiment, the anvil body 1 is provided with a sliding mounting groove 11 for sliding the nail felt plate 3; the nail felt plate 3 is slidably disposed on the sliding mounting groove 11. In this embodiment, the movement stability of the nail felt plate 3 can be further improved, and lateral displacement of the nail felt plate 3 and the mating groove 2 can be avoided.

[0034] In one embodiment, a flexible connection structure is provided between the nail felt plate 3 near the outer side of the nail base body 1 and the outer side of the nail base body 1; When n1≥2, a flexible connection structure is provided between two adjacent nail felt plates 3. In this embodiment, the flexible connection structure, on the one hand, allows a transitional connection to be formed during the relative movement of the nail felt plate 3 with the anvil body 1 or adjacent nail felt plates 3, enabling the adjacent nail felt plates 3 to move in coordination. On the other hand, it can eliminate the stepped surface of relative displacement, preventing tissue from being pinched during movement, thereby protecting the tissue.

[0035] In one embodiment, the flexible connection structure is made of a biocompatible elastic material, such as medical-grade silicone. The flexible connection structure made of a biocompatible elastic material can form a flexible sealing band between relatively moving components, minimizing damage to tissues.

[0036] This utility model also provides a stapler, including the aforementioned anvil seat with adaptive staple closing height. In this stapler, all components except the anvil seat can directly adopt existing structures, and the anvil seat only requires structural improvements to the staple felt part, thus enabling the staples 5 to adaptively close according to the characteristics of the tissue to be sutured during anastomosis.

[0037] In one embodiment, the stapler's staple cartridge contains pre-filled staples 5 of a single specification. This allows for adaptive suturing with staples 5 of a single specification having different closure heights.

[0038] The above description is merely an embodiment and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solution of this utility model without departing from its scope. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model, without departing from its scope, should fall within the protection scope of this utility model.

Claims

1. An anvil for adaptive staple closing height, characterized in that, It includes an anvil body (1) and several mating grooves (2) provided on the anvil body (1); The bottom of at least one anastomosis groove (2) can move elastically along the groove depth direction of the anastomosis groove (2), so that the staple (5) can adapt the closing height according to the characteristics of the tissue to be sutured when anastomosing; It also includes n1 nailing felt boards (3), each nailing felt board (3) is provided with n2 matching grooves (2), where n1≥1, n2≥1; The nailing felt plate (3) is slidably disposed on the anvil body (1) along the groove depth direction of the matching groove (2); An elastic element (4) is provided between the bottom of the nailing felt plate (3) and the nailing seat body (1). The elastic element (4) allows the bottom of the matching groove (2) to move elastically along the groove depth direction of the matching groove (2). A flexible connection structure is provided between the nailing felt plate (3) near the outer side of the anvil body (1) and the outer side of the anvil body (1); When n1≥2, a flexible connection structure is provided between two adjacent nail felt plates (3).

2. The anvil for adaptive staple closing height as described in claim 1, characterized in that, The elastic element (4) consists of n3 springs arranged between the bottom of the nail felt plate (3) and the nail seat body (1), where n3 ≥ 1.

3. The anvil for adaptive staple closing height as described in claim 2, characterized in that, The bottom of the nail felt plate (3) and the anvil body (1) are provided with corresponding fitting grooves, and the two ends of the spring are respectively fitted into the fitting grooves of the nail felt plate (3) and the anvil body (1).

4. The anvil for adaptive staple closing height as described in claim 1, characterized in that, The anvil body (1) is provided with a sliding mounting groove (11) for the nail felt plate (3) to slide. The nailing felt board (3) is slidably set on the sliding mounting groove (11).

5. The anvil for adaptive staple closing height as described in claim 1, characterized in that, The flexible connection structure is made of biocompatible elastic material.

6. A stapler, characterized in that, Includes an anvil for adaptive staple closure height as described in any one of claims 1-5.

7. The stapler as claimed in claim 6, characterized in that, The stapler cartridge contains a single-size staple (5).

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