Ligation clip

Abstract

The application discloses a ligature clamp, and relates to the technical field of medical devices, which comprises a first clamp arm and a second clamp arm, the length direction of both of which is respectively provided with an elastic connecting part and a locking unit at both ends; the opposite inner sides of the first clamp arm and the second clamp arm form a clamping surface for clamping a ligature tissue; the clamping surface is sequentially provided with an anti-falling locking area, a gradual transition area and a pressure reduction buffer area along the transverse width direction, the contact proportion of the surface microstructure of each area to the ligature tissue sequentially decreases, so that the ligature tissue is sequentially weakened in stress and is limited and clamped; the ligature clamp can realize gradual clamping, reduces local high pressure concentration while ensuring the stability of the ligature, and reduces the risk of excessive compression on blood vessels or soft tissues; and the technical problem that the existing ligature clamp lacks a gradual clamping process and excessive compression on blood vessels or soft tissues due to local high pressure concentration exists in the clamping process is solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a ligation clip. Background Technology

[0002] A ligation clip is a medical device commonly used in surgical procedures, primarily for clamping and ligating blood vessels or other soft tissues to block the flow of blood or bodily fluids. Traditional ligation clips typically consist of two clamping arms and an elastic connecting part that links the two arms. During use, the clamping action causes the two arms to grip the tissue, thereby achieving the ligation.

[0003] Existing ligation clips typically have anti-slip teeth or raised structures on their clamping surfaces to prevent the clamped blood vessels or tissues from slipping after ligation. However, in practical applications, traditional ligation clips have been found to have the following common problems:

[0004] First, traditional clamping surfaces typically employ uniformly distributed toothed or raised structures. During the clamping process, the clamping force is often unevenly distributed across different positions on the clamping surface, which can easily create significant contact pressure in localized areas, thereby causing excessive compression or even cutting damage to blood vessels or soft tissues.

[0005] Second, existing clamping structures typically provide the same form of constraint across the entire clamping surface, resulting in strong limiting of the tissue during clamping. This lacks a progressive clamping process, which can easily lead to tissue slippage in the early stages of clamping and localized high-pressure concentration at the end of clamping.

[0006] Third, in the front area of ​​the ligation clip, due to the relatively concentrated clamping structure, the tissue often bears a large compressive force at the clamping end, which may lead to tissue damage or affect the stability of the ligation.

[0007] Therefore, it is necessary to provide a new ligation clip structure that allows the clamping surface to form different contact patterns in different areas, thereby reducing the risk of tissue damage while ensuring ligation stability.

[0008] In summary, the existing technology has at least the following technical problems:

[0009] Existing ligation clips lack a progressive clamping process, and there is a technical problem that excessive pressure on blood vessels or soft tissues can occur due to local high pressure concentration during clamping. Summary of the Invention

[0010] The purpose of this invention is to provide a ligation clip to solve the technical problem that existing ligation clips lack a progressive clamping process and cause excessive compression of blood vessels or soft tissues due to local high pressure concentration during clamping.

[0011] The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.

[0012] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0013] This invention provides a ligation clip, including a first clamping arm and a second clamping arm; the first clamping arm and the second clamping arm are respectively provided with elastic connecting parts and locking units arranged opposite to each other at their ends along the length direction; the first clamping arm and the second clamping arm approach or separate from each other under the action of the elastic connecting parts, and the locking units engage and lock when the end openings of the first clamping arm and the second clamping arm approach each other; the inner sides of the first clamping arm and the second clamping arm respectively form clamping surfaces for clamping the tissue to be ligated; a plurality of clamping zones are sequentially provided along the transverse width direction on the clamping surfaces, namely an anti-dislodgement locking zone, a progressive transition zone, and a decompression buffer zone; the surface microstructures in the anti-dislodgement locking zone, the progressive transition zone, and the decompression buffer zone decrease sequentially in the contact ratio with the tissue to be ligated, and each clamping zone forms a limiting clamping that gradually weakens the force on the tissue to be ligated.

[0014] In one embodiment, the anti-dislodgement locking area, the progressive transition area, and the decompression buffer zone on the first clamping arm and the second clamping arm are arranged correspondingly to each other; the contact ratio is the proportion of the projected area of ​​the top of the surface microstructure and / or the continuous contact surface facing the tissue to be ligated in each clamping partition to the total area of ​​each clamping partition.

[0015] In one embodiment, the contact ratio of the anti-disengagement locking zone is 45% to 75%, the contact ratio of the progressive transition zone is 20% to 45%, and the contact ratio of the decompression buffer zone is 5% to 15%.

[0016] In one embodiment, the difference in contact ratio between the anti-disengagement holding area and the decompression buffer zone is 30% to 60%.

[0017] In one embodiment, the surface microstructure in the anti-disengagement locking area is a multi-spaced ridge structure arranged along the length of the anti-disengagement locking area and extending along the lateral width of the clamping surface.

[0018] In one embodiment, the surface microstructure in the progressive transition zone is a plurality of intermittent ridges arranged along the length direction of the progressive transition zone and extending along the lateral width direction of the clamping surface. The intermittent ridges are offset from the projection positions of the ridge structures along the length direction of the progressive transition zone, and the coverage of the surface microstructure in the progressive transition zone gradually decreases along the direction toward the decompression buffer.

[0019] In one embodiment, the surface microstructure of the pressure relief buffer is a plurality of spaced arc-shaped ridges arranged along the length of the pressure relief buffer and extending along the lateral width of the clamping surface.

[0020] In one embodiment, the clamping surface is structured such that the inner sides of the first clamping arm and the second clamping arm respectively form concave arc-shaped surfaces that wrap around each other; along the lateral width direction of the clamping surface, the lateral width ratios of the anti-disengagement locking area, the progressive transition area and the decompression buffer zone are 20%–50%, 20%–50% and 10%–30%, respectively.

[0021] In one embodiment, the elastic connecting part is a U-shaped bend structure with both ends extending inward in the length direction, integrally formed with the first clamping arm and the second clamping arm. The deformation elastic force of the elastic connecting part drives the clamping sections of the first clamping arm and the second clamping arm to close inward to form a clamping state.

[0022] In one embodiment, the locking unit is a locking and locking groove mating structure integrally formed with the first clamping arm and the second clamping arm. The root of the locking groove is provided with a limiting platform, and the end of the locking buckle is provided with a limiting protrusion corresponding to the limiting platform. The locking unit is used to limit the maximum closure of the first clamping arm and the second clamping arm on the tissue to be ligated and to lock the outward movement tendency of the first clamping arm and the second clamping arm.

[0023] The beneficial effects of this invention are as follows:

[0024] Firstly, this technical solution, by sequentially setting an anti-dislodgement locking zone, a progressive transition zone, and a pressure-reducing buffer zone along the transverse width of the clamping surface where the first and second clamping arms are positioned opposite each other, transforms the clamping surface from a homogeneous structure with a single region and single clamping mode into a partitioned clamping structure with different functions. Therefore, the tissue to be ligated can be subjected to clamping constraints of varying intensities during the clamping process, achieving a progressive clamping process from strong restraint to gradually weakening restraint. This effectively improves the problems of existing ligation clips having a single mode of action and unreasonable clamping force distribution during clamping.

[0025] Secondly, by progressively decreasing the contact ratio of the surface microstructures in the anti-dislodgement locking zone, the gradual transition zone, and the decompression buffer zone with respect to the tissue to be ligated, each clamping zone provides a progressively weaker limiting clamping effect on the tissue. Specifically, the anti-dislodgement locking zone provides relatively strong locking and anti-slip properties, which helps improve the stability of the tissue after clamping and reduces the risk of tissue slippage in the initial or subsequent stages of clamping; the gradual transition zone creates a force transition between strong and weak restraint, avoiding abrupt changes in clamping force between different areas; and the decompression buffer zone provides a gentler contact constraint with a relatively low contact ratio, thereby reducing the concentration of contact pressure at the end of the clamp or in localized areas. Therefore, this technical solution can reduce the risk of excessive compression or even damage to blood vessels or soft tissues caused by localized high pressure concentration while ensuring clamping stability.

[0026] Furthermore, the partitioned clamping surface structure achieves graded variations in clamping action across different areas through differences in the contact ratio of the surface microstructures of the clamping surface. This eliminates the need for complex moving parts or multi-stage drive mechanisms, enabling progressive clamping functionality within the existing basic clamping structure. Therefore, this invention not only maintains a compact overall structure, simple forming method, and convenient manufacturing, but also helps control device size, processing difficulty, and production costs, making it suitable for the miniaturization and mass production requirements of medical devices.

[0027] Furthermore, the first and second clamping arms are connected by elastic joints to allow them to move closer or separate, and are locked at the end openings by locking units, ensuring a stable locking state after clamping. This structure, in conjunction with the aforementioned partitioned clamping surfaces, ensures reliable closure during clamping and maintains stable clamping of the tissue to be ligated after clamping, thereby further improving ligation reliability and safety.

[0028] In summary, this technical solution, by setting an anti-dislodgement locking zone, a progressive transition zone, and a decompression buffer zone on the clamping surface, and by progressively decreasing the contact ratio of the microstructures on the surface of each zone, forms a limiting clamping effect that gradually weakens the force on the tissue to be ligated. This achieves progressive clamping of the tissue by the ligation clip, which not only helps to improve clamping stability and anti-dislodgement ability, but also effectively alleviates the problem of local high pressure concentration and reduces the risk of excessive compression on blood vessels or soft tissues. It has good clinical application practicality and promotion significance. Attached Figure Description

[0029] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an isometric structural schematic diagram of the ligation clip of the present invention;

[0031] Figure 2 This is a side view of the ligation clip of the present invention;

[0032] Figure 3 yes Figure 2 A top view of the AA cross-section structure;

[0033] Figure 4 yes Figure 3 A partial side view of the structure.

[0034] The accompanying figure is labeled as follows:

[0035] 1. First clamping arm;

[0036] 2. Second clamping arm;

[0037] 3. Clamping surface; 31. Curved surface; 32. Clamping zone; 33. Anti-disengagement locking zone; 34. Progressive transition zone; 35. Pressure relief buffer zone;

[0038] 4. Surface microstructure; 41. Ridge structure; 42. Discontinuous ridges; 43. Arc-shaped ridges;

[0039] 5. Flexible connection part;

[0040] 6. Locking unit; 61. Locking latch; 611. Limiting boss; 62. Locking groove; 621. Limiting platform. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0042] A specific embodiment provides a ligation clip, which includes a first clamping arm and a second clamping arm. The first and second clamping arms have opposingly arranged elastic connecting portions and locking units at their respective ends along their length. The first and second clamping arms move closer together or separate under the action of the elastic connecting portions. When the end openings of the first and second clamping arms approach each other, the locking units engage and lock. The inner sides of the opposing first and second clamping arms respectively form clamping surfaces for clamping the tissue to be ligated. Multiple clamping zones are sequentially provided along the transverse width of the clamping surfaces, namely an anti-dislodgement locking zone, a progressive transition zone, and... The pressure relief buffer zone, the anti-dislodgement locking zone, and the progressive transition zone all have surface microstructures that decrease in contact percentage with the tissue to be ligated in sequence. Each clamping zone forms a limiting clamp that gradually reduces the force on the tissue to be ligated. Through this structure, the tissue to be ligated can achieve a progressive clamping effect during the clamping process, ensuring ligation stability while reducing the risk of excessive compression of blood vessels or soft tissues caused by local high pressure concentration. This effectively solves the technical problem of existing ligation clips lacking a progressive clamping process and causing excessive compression of blood vessels or soft tissues due to local high pressure concentration during clamping.

[0043] The first implementation of the ligation clip, for example Figure 1 and Figure 2 As shown, it includes a first clamping arm 1 and a second clamping arm 2; the two ends of the first clamping arm 1 and the second clamping arm 2 along the length direction are respectively provided with elastic connecting parts 5 and locking units 6 arranged opposite to each other; the first clamping arm 1 and the second clamping arm 2 approach or separate from each other under the action of the elastic connecting parts 5, and the locking units 6 engage and lock when the end openings of the first clamping arm 1 and the second clamping arm 2 approach each other; the inner sides of the first clamping arm 1 and the second clamping arm 2 respectively form clamping surfaces 3 for clamping the tissue to be ligated; multiple clamping zones 32 are arranged sequentially along the transverse width direction on the clamping surface 3, namely, anti-dislodgement locking zone 33, progressive transition zone 34 and decompression buffer zone 35; the surface microstructures 4 in the anti-dislodgement locking zone 33, progressive transition zone 34 and decompression buffer zone 35 decrease sequentially in the contact ratio with the tissue to be ligated, and each clamping zone 32 forms a limiting clamping that gradually weakens the force on the tissue to be ligated.

[0044] Specifically, by sequentially setting an anti-dislodgement locking zone 33, a progressive transition zone 34, and a pressure-reducing buffer zone 35 along the transverse width direction on the clamping surface 3, the clamping surface 3 is no longer a homogeneous structure with a single area and a single clamping mode, but rather a partitioned clamping structure with different functions. Thus, the tissue to be ligated can be subjected to clamping constraints of varying intensities during the clamping process, achieving a progressive clamping process from strong restraint to gradually weakening restraint, thereby effectively improving the problems of single action mode and unreasonable clamping force distribution in existing ligation clips.

[0045] Secondly, by progressively decreasing the contact ratio of the surface microstructures 4 in the anti-dislodgement locking zone 33, the gradual transition zone 34, and the decompression buffer zone 35 towards the tissue to be ligated, each clamping zone 32 provides a progressively weaker limiting clamping effect on the tissue to be ligated. Specifically, the anti-dislodgement locking zone 33 provides relatively strong locking and anti-slip effects, which helps improve the stability of the tissue after clamping and reduces the risk of tissue slippage in the initial or subsequent clamping stages; the gradual transition zone 34 creates a force transition between strong and weak limiting, avoiding abrupt changes in clamping force between different areas; and the decompression buffer zone 35 provides a gentler contact constraint on the tissue with a relatively low contact ratio, thereby reducing the concentration of contact pressure at the clamping end or in localized areas. Therefore, this technical solution can reduce the risk of excessive compression or even damage to blood vessels or soft tissues caused by localized high pressure concentration while ensuring clamping stability.

[0046] Furthermore, the partitioned clamping surface 3 structure achieves graded changes in clamping action in different areas through the difference in the contact ratio of the surface microstructures 4 of the clamping surface 3. This eliminates the need for additional complex moving components or multi-stage drive mechanisms, enabling progressive clamping functionality based on the existing basic clamping clamp structure. Therefore, this invention not only maintains a compact overall structure, simple forming method, and convenient manufacturing, but also helps control the size of the device, processing difficulty, and production cost, making it suitable for the miniaturization and mass production requirements of medical devices.

[0047] Furthermore, the first clamping arm 1 and the second clamping arm 2 are brought closer together or separated by the elastic connecting part 5, and are locked at the end opening by the locking unit 6, so that the ligation clip can maintain a stable locked state after clamping. This structure, in conjunction with the aforementioned partitioned clamping surface 3, ensures reliable closure during the clamping process and maintains a stable clamping effect on the tissue to be ligated after clamping, thereby further improving the reliability and safety of ligation.

[0048] In summary, this technical solution, by setting an anti-dislodgement locking zone 33, a progressive transition zone 34, and a decompression buffer zone 35 on the clamping surface 3, and by making the contact ratio of the microstructures 4 on the surface of each zone decrease sequentially, forms a limiting clamping effect that gradually weakens the force on the tissue to be ligated. This achieves progressive clamping of the tissue by the ligation clip, which not only helps to improve clamping stability and anti-dislodgement ability, but also effectively alleviates the problem of local high pressure concentration and reduces the risk of excessive compression on blood vessels or soft tissues. It has good clinical application practicality and promotion significance.

[0049] As one alternative implementation method:

[0050] Regarding the contact ratio and working mechanism of the aforementioned multiple clamping zones 32 and their respective surface microstructures 4, this embodiment, for example... Figure 1 and Figure 2 As shown, the anti-dislodgement locking area 33, the progressive transition area 34 and the decompression buffer zone 35 on the first clamping arm 1 and the second clamping arm 2 are arranged correspondingly to each other; the contact ratio is the proportion of the projected area of ​​the top of the surface microstructure 4 and / or the continuous contact surface facing the tissue to be ligated in each clamping partition 32 to the total area of ​​each clamping partition 32.

[0051] In application, the anti-dislodgement locking area 33, the progressive transition area 34, and the decompression buffer zone 35 on the first clamping arm 1 and the second clamping arm 2 are arranged correspondingly to each other, so that the tissue to be ligated can form symmetrical force between the same functional zones when the clamping surfaces 3 on both sides are closed, avoiding the problems of biased clamping, local shearing, or uneven force caused by strong restriction on one side and weak contact on the other side; among them, the contact ratio is calibrated by the ratio between the projected area of ​​the top of the surface microstructure 4 and / or the continuous contact surface and the total area of ​​the corresponding clamping zone 32, so that the actual contact degree of each clamping zone 32 with the tissue has a quantitative basis, which makes it easier to meet the design standards during manufacturing. By defining the contact ratio in this way, the rather vague "surface roughness" or "anti-slip degree" in traditional ligation clips can be transformed into contact mode parameters that can be controlled by zones. This, together with the microstructure morphology, width ratio, and locking closure amount of different zones, forms a graded clamping mechanism that transitions from locking to buffering of the tissue to be ligated. This solves the technical problems of existing ligation clips, such as the lack of gradualness in the clamping process, the difficulty in finely controlling the clamping force distribution, and the tendency for high pressure concentration in local areas.

[0052] The aforementioned contact ratio calibration in production can be designed and verified by combining two-dimensional projection measurement, three-dimensional contour measurement, or mold forming parameters. For example, the equivalent contact area of ​​the surface microstructure 4 of each partition can be obtained by microscopic imaging, contour scanning, mold texture map calculation, or sample imprinting test, so as to pre-control the contact characteristics of different clamping partitions 32 in the design stage and accurately implement the designed structure in production.

[0053] Regarding the specific contact ratio and working mechanism of the surface microstructures 4 of the above-mentioned multiple clamping zones 32, the contact ratio of the anti-disengagement clamping zone 33 is 45% to 75%, the contact ratio of the progressive transition zone 34 is 20% to 45%, and the contact ratio of the pressure relief buffer zone 35 is 5% to 15%.

[0054] Setting the contact ratio of the anti-dislodgement locking zone 33 to 45%–75%, the contact ratio of the progressive transition zone 34 to 20%–45%, and the contact ratio of the decompression buffer zone 35 to 5%–15% allows the clamping surface 3 to form a clear but not abrupt contact gradient along the transverse width direction, making the transition between each zone smooth. Among them, the higher contact ratio of the anti-dislodgement locking zone 33 is conducive to the rapid formation of stable limiting and high friction retention capacity after the tissue initially enters the clamping state, inhibiting the axial or radial slippage of the tissue along the clamping surface 3. The progressive transition zone 34 adopts a medium contact ratio, so that this area retains a certain support and limiting function without continuing the high constraint state of the anti-dislodgement locking zone 33, thus forming a transition in terms of force. The decompression buffer zone 35 adopts a lower contact ratio, so that this area performs more of a gentle fit and end decompression effect on the tissue, reducing the local high stress concentration formed at the clamping front edge or edge position in the later stage of clamping. This numerical range works in conjunction with the structural form and width ratio of each partition, as well as the function of locking unit 6 in limiting the maximum closure amount. This can reduce the risk of excessive compression on the blood vessel wall and soft tissue while ensuring ligation stability, thus improving the contradictory state of the traditional homogeneous clamping surface 3, which is either unstable or over-compressed.

[0055] Regarding the setting gradient and mechanism of the contact ratio of the surface microstructures 4 of the anti-loosening locking area 33 and the decompression buffer zone 35, the difference in the contact ratio between the anti-loosening locking area 33 and the decompression buffer zone 35 is 30% to 60%.

[0056] Setting the contact ratio difference between the anti-slip holding zone 33 and the decompression buffer zone 35 to 30%–60% effectively establishes an effective and controllable clamping gradient window between the high-limit zone and the low-pressure buffer zone. When this difference is within the above range, on the one hand, it ensures that the anti-slip holding zone 33 has a sufficiently significant structural and functional difference relative to the decompression buffer zone 35, allowing the tissue to be ligated to truly experience a transition from strong clamping to weak constraint during clamping, rather than merely remaining at the nominal partition level; on the other hand, it avoids excessively large differences in contact states between the two zones, which could lead to sudden stress jumps in the tissue at the partition boundaries. This difference setting, combined with the intermediate transition function of the progressive transition zone 34, allows for a redistribution of contact stress in the transverse width direction of the tissue, which is more conducive to dispersing the high-pressure peaks that are traditionally concentrated at local sharp anti-slip teeth to multiple functional areas, thereby simultaneously taking into account anti-slip capability and tissue protection capability, solving the problem of difficulty in balancing local high-pressure concentration and clamping stability in existing technologies.

[0057] Regarding the specific structural configuration and working mechanism of the surface microstructure 4 of the aforementioned anti-disengagement locking area 33, this embodiment is as follows: Figure 3 and Figure 4As shown, the surface microstructure 4 in the anti-disengagement locking area 33 consists of multiple spaced ridge structures 41 arranged along the length of the anti-disengagement locking area 33 and extending along the transverse width of the clamping surface 3.

[0058] The multiple convex ridges 41 spaced apart in the anti-slip locking zone 33 allow them to form multi-line contact and limiting support on the tissue surface across a certain lateral range when the clamp is closed. Since each convex ridge 41 extends along its lateral width, its constraint on the tissue is not concentrated at a single isolated point, but rather forms a relatively continuous lateral gripping band, which is beneficial for improving the anti-slip performance and posture stability in the initial stage of ligation. Simultaneously, the multiple convex ridges 41 are spaced apart along their length, reserving space for slight tissue deformation while maintaining a high contact ratio, avoiding the formation of a completely solid compression surface. This structure, in conjunction with the discontinuous ridges 42 of the progressive transition zone 34 and the arc-shaped ridges 43 of the decompression buffer zone 35, enables the anti-slip locking zone 33 to undertake the main anti-slip and stable locking functions, solving the problems of tissue movement, displacement, or insufficient stability after closure in traditional ligation clips during the initial stage of clamping.

[0059] Regarding the specific structural configuration and working mechanism of the surface microstructure 4 in the aforementioned progressive transition region 34, this embodiment is, for example... Figure 3 and Figure 4 As shown, the surface microstructure 4 in the progressive transition zone 34 is a series of intermittent ridges 42 arranged along the length of the progressive transition zone 34 and extending along the lateral width of the clamping surface 3. The intermittent ridges 42 are offset from the projection position of the ridge structure 41 along the length of the progressive transition zone 34, and the coverage of the surface microstructure 4 in the progressive transition zone 34 gradually decreases in the direction toward the decompression buffer 35.

[0060] The progressive transition zone 34 features multiple intermittent raised lines 42 arranged at intervals, and their projection positions relative to the raised ridge structure 41 along the length of the progressive transition zone 34 are staggered. This design causes the coverage of the surface microstructures 4 in this zone to gradually decrease towards the decompression buffer zone 35. This structure transforms the progressive transition zone 34 from a simple "lower-level anti-slip zone" into a functional transition zone connecting the high-locking zone and the low-pressure buffer zone. On one hand, the intermittent raised lines 42 retain some support and guidance for the tissue, preventing a sudden loss of constraint when the tissue transitions from the anti-loosening locking zone 33 to the decompression buffer zone 35. On the other hand, the intermittent structure itself and the gradually decreasing coverage design cause the contact stiffness and restraint strength of this area to gradually decrease, thereby reducing sudden stress changes. The staggered projection positions prevent this zone from forming a superimposed pressure band with the raised ridge structure 41 of the anti-loosening locking zone 33 on the same projection line, helping to weaken local peak stress and improve the stress diffusion path on the tissue surface. Therefore, after the gradual transition zone 34 works in conjunction with the two side zones, it can effectively establish a continuous clamping process of "locking-releasing-decompression", solving the problems of abrupt clamping process, sudden change of boundary force and insufficient transition in traditional ligation clips.

[0061] Regarding the specific structural configuration and working mechanism of the surface microstructure 4 of the aforementioned decompression buffer 35, this embodiment is as follows: Figure 3 and Figure 4 As shown, the surface microstructure 4 of the pressure relief buffer 35 consists of multiple spaced arc-shaped ridges 43 arranged along the length of the pressure relief buffer 35 and extending along the transverse width of the clamping surface 3; the arc-shaped ridges 43 are offset from the projection positions of the discontinuous ridges 42 along the length of the pressure relief buffer 35.

[0062] The surface microstructure 4 in the decompression buffer zone 35 employs multiple spaced arc-shaped ridges 43 arranged along the length of the decompression buffer zone 35 and extending along the transverse width of the clamping surface 3. This allows the area to maintain a certain level of contact guidance and fit while reducing the tendency to cut the tissue and the concentration of indentations through a smooth transition at the top surface. Compared to the ridge structure 41 of the anti-dislodgement locking zone 33 and the discontinuous ridges 42 of the progressive transition zone 34, the arc-shaped ridges 43 emphasize more compliant support and pressure dispersion. Their smooth transition at the top helps to expand the equivalent force diffusion range and form a gentle support contact with the tissue at the clamping end. This structure, in conjunction with the low contact ratio of the decompression buffer zone 35, allows this area to primarily undertake the functions of end pressure relief, edge buffering, and compliant fit during the overall clamping process, thereby reducing the risk of local high pressure concentration and tissue damage caused by excessively sharp structures or excessive constraints in the front or edge areas of traditional ligation clips.

[0063] Regarding the specific structural arrangement and working mechanism of the clamping surface 3, and the width ratio and working mechanism of each clamping section 32, this embodiment, for example... Figures 1 to 3As shown, the structure of the clamping surface 3 is such that the inner sides of the first clamping arm 1 and the second clamping arm 2 respectively form concave arc-shaped surfaces 31 that wrap around each other; along the lateral width direction of the clamping surface 3, the lateral width ratios of the anti-disengagement locking area 33, the progressive transition area 34 and the pressure relief buffer area 35 are 20% to 50%, 20% to 50% and 10% to 30%, respectively.

[0064] The clamping surface 3 is structured such that the inner sides of the first clamping arm 1 and the second clamping arm 2 form concave, opposing arc-shaped surfaces 31, making the overall contour of the clamping surface 3 more consistent with the peripheral morphology of blood vessels or soft tissues. This facilitates a covering contact rather than a rigid, flat compression during clamping. Along the lateral width direction of the clamping surface 3, the anti-disengagement locking area 33, the progressive transition area 34, and the decompression buffer zone 35 account for 20%–50%, 20%–50%, and 10%–30% of the lateral width, respectively. This ensures that the three components have sufficient functional area and maintain a reasonable proportional distribution within the overall clamping surface 3. When the width of the anti-disengagement locking area 33 is not less than a certain range, sufficient anti-slip locking capability can be guaranteed. When the width of the progressive transition area 34 is not less than a certain range, sufficient transition stroke between the high limit and the low limit is ensured. When the decompression buffer zone 35 retains an appropriate width, a clear de-load area can be formed at the clamping end.

[0065] By combining the overall arc-shaped base surface and the partition width configuration with the contact ratio of the microstructure in each area and the closing amount limitation of the locking unit 6, the clamping surface 3 further enhances the ability of the clamping surface 3 to control the stress distribution, solving the problem that traditional flat or homogeneous clamping surfaces 3 cannot simultaneously take into account the problems of covering and fitting, stable anti-slip and local pressure reduction.

[0066] Regarding the specific structure and working mechanism of the aforementioned elastic connection part 5, this embodiment is as follows: Figure 1 and Figure 2 As shown, the elastic connecting part 5 is a U-shaped bent structure with both ends extending inward in the length direction, integrally formed with the first clamping arm 1 and the second clamping arm 2. The deformation elastic force of the elastic connecting part 5 drives the clamping partition 32 of the first clamping arm 1 and the second clamping arm 2 to close inward to form a clamping state.

[0067] The U-shaped bend structure of the elastic connection 5 provides both a stable spring-opening capability and a controlled closing tendency for the two clamping arms through its own elastic deformation during clamping. This U-shaped bend structure, in conjunction with the clamping zone 32 design, allows the first clamping arm 1 and the second clamping arm 2 to generate a symmetrical closing movement around the elastic connection 5 during use. This ensures that the anti-dislodgement locking zone 33, the progressive transition zone 34, and the decompression buffer zone 35 are progressively pressed towards the tissue to be ligated according to a predetermined spatial relationship, thus providing the basic motion conditions for the progressive clamping process. Compared to complex hinges or additional springs, the one-piece molded U-shaped bend structure simplifies the number of components and assembly relationships, helping to ensure a compact instrument structure and continuous force distribution, while also improving molding consistency and long-term stability, thus solving the problems of unstable closing movement, excessive components, or complex manufacturing in existing structures.

[0068] Regarding the specific structure and working mechanism of the aforementioned locking unit 6, this embodiment is, for example... Figure 1 and Figure 2 As shown, the locking unit 6 is a locking buckle 61 and buckle groove 62 integrally formed with the first clamping arm 1 and the second clamping arm 2. The root of the buckle groove 62 is provided with a limiting platform 621, and the end of the locking buckle 61 is provided with a limiting protrusion 611 corresponding to the limiting platform 621. The locking unit 6 is used to limit the maximum closure of the first clamping arm 1 and the second clamping arm 2 to be ligated tissue and to lock the outward movement tendency of the first clamping arm 1 and the second clamping arm 2.

[0069] The locking unit 6 adopts a locking buckle 61 and buckle groove 62 integrally formed with the first clamping arm 1 and the second clamping arm 2. A limiting platform 621 is provided at the root of the buckle groove 62, and a limiting protrusion 611 corresponding to the limiting platform 621 is provided at the end of the locking buckle 61. This makes the locking unit 6 not only undertake the locking function after the clamping arms are closed, but also undertake the function of limiting the maximum closing amount.

[0070] In use, as the first clamping arm 1 and the second clamping arm 2 gradually approach and clamp the tissue to be ligated under the drive of the elastic connecting part 5, the locking buckle 61 enters the locking groove 62 and forms a locking mechanism. At the same time, the limiting boss 611 and the limiting platform 621 cooperate to limit further over-closing of the two clamping arms. This structure, in conjunction with the aforementioned partitioned clamping surface 3, can provide stable limiting in the anti-dislodgement locking area 33, and prevent excessive compressive load on the tissue in local areas, especially in areas with a high contact ratio, due to continuous closure. This further controls the upper limit of the overall clamping pressure, improves the stability and safety after ligation, and solves the problem that traditional ligation clips may still damage the tissue due to excessive closure after locking.

[0071] The second embodiment of the ligation clip differs from the first embodiment in that...

[0072] The first clamping arm 1, the second clamping arm 2, the elastic connecting part 5, and the locking unit 6 are made of one or more of polyetheretherketone, polyoxymethylene, and polyamide.

[0073] When applied, the first clamping arm 1, the second clamping arm 2, the elastic connecting part 5, and the locking unit 6 are made of one or more of polyetheretherketone, polyoxymethylene, and polyamide, which enables the ligation clip to achieve the above-mentioned partitioned clamping structure while having good formability, elastic recovery ability, dimensional stability, and biomedical adaptability.

[0074] Polyetheretherketone (PEEK) offers high mechanical strength, heat resistance, and structural stability, which helps maintain the precision of microstructure forming and the overall rigidity of the clamping arm. Polyoxymethylene (POM) has good dimensional accuracy and low friction characteristics, which facilitates smooth engagement of the locking unit 6 and stable repetitive movements. Polyamide possesses certain toughness and processing adaptability, which helps improve the deformation recovery capability of the elastic connection 5. Through the synergy between the material properties and the aforementioned clamping zones 32, surface microstructures 4, elastic connection 5, and locking units 6, it is further ensured that the microstructures of each zone maintain the predetermined contact ratio and contact shape after forming, thereby improving the clamping consistency and reliability of the ligation clip in actual use and solving the problems of mismatch between rigidity and flexibility of traditional materials, easy distortion of microstructures, or insufficient locking life.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A ligation clip, characterized in that, It includes a first clamping arm and a second clamping arm; the first clamping arm and the second clamping arm are respectively provided with elastic connecting parts and locking units arranged opposite to each other at both ends along the length direction; the first clamping arm and the second clamping arm approach or separate from each other under the action of the elastic connecting parts; when the end openings of the first clamping arm and the second clamping arm approach each other, the locking units engage and lock; the inner sides of the first clamping arm and the second clamping arm are respectively formed with clamping surfaces for clamping the tissue to be ligated. The clamping surface is provided with multiple clamping zones in sequence along the lateral width direction, namely an anti-disengagement clamping zone, a progressive transition zone, and a pressure relief buffer zone; The anti-disengagement locking area, the progressive transition area, and the decompression buffer zone on the first clamping arm and the second clamping arm are arranged correspondingly to each other; The contact ratio is the proportion of the projected area of ​​the top of the surface microstructure and / or the continuous contact surface facing the tissue to be ligated in each clamping partition to the total area of ​​each clamping partition. The surface microstructures in the anti-detachment locking zone, the progressive transition zone, and the decompression buffer zone decrease sequentially in the contact ratio with the tissue to be ligated, and each of the clamping zones forms a limiting clamp that gradually weakens the force on the tissue to be ligated. The contact ratio of the anti-disengagement locking zone is 45% to 75%, the contact ratio of the progressive transition zone is 20% to 45%, the contact ratio of the pressure relief buffer zone is 5% to 15%, and the difference between the contact ratio of the anti-disengagement locking zone and the pressure relief buffer zone is 30% to 60%. The surface microstructure in the anti-disengagement locking area is a multi-spaced convex ridge structure arranged along the length direction of the anti-disengagement locking area and extending along the lateral width direction of the clamping surface. The surface microstructure in the progressive transition zone consists of multiple intermittent raised lines arranged along the length of the progressive transition zone and extending along the lateral width of the clamping surface. The intermittent raised lines are offset from the projection positions of the raised ridge structure along the length of the progressive transition zone, and the coverage of the surface microstructure in the progressive transition zone gradually decreases along the direction toward the decompression buffer. The surface microstructure of the pressure relief buffer consists of multiple spaced arc-shaped ridges arranged along the length of the pressure relief buffer and extending along the lateral width of the clamping surface. The clamping surface is structured such that the inner sides of the first clamping arm and the second clamping arm respectively form concave arc-shaped surfaces that wrap around each other; along the lateral width direction of the clamping surface, the lateral width ratios of the anti-disengagement locking area, the progressive transition area and the decompression buffer zone are 20% to 50%, 20% to 50% and 10% to 30%, respectively.

2. The ligation clip according to claim 1, characterized in that, The elastic connecting part is a U-shaped bend structure that extends inward in the length direction at both ends and is integrally formed with the first clamping arm and the second clamping arm. The deformation elastic force of the elastic connecting part drives the clamping sections of the first clamping arm and the second clamping arm to close inward to form a clamping state.

3. The ligation clip according to claim 1, characterized in that, The locking unit is a locking and locking groove structure integrally formed with the first clamping arm and the second clamping arm. The root of the locking groove is provided with a limiting platform, and the end of the locking buckle is provided with a limiting protrusion corresponding to the limiting platform. The locking unit is used to limit the maximum closure of the first clamping arm and the second clamping arm on the tissue to be ligated and to lock the outward movement tendency of the first clamping arm and the second clamping arm.

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