Closing clamp capable of preventing tissue from being torn

Abstract

The utility model discloses a closing clip capable of preventing tissue from being torn, and belongs to the field of medical hemostatic clips. The closing clamp capable of preventing the tissue from being torn comprises a first clamping arm and a second clamping arm, the near ends of the first clamping arm and the second clamping arm are connected through a connecting part, and the far end of the first clamping arm and the far end of the second clamping arm are respectively provided with a locking structure which can be buckled and locked together. The clamping faces of the first clamping arm and the second clamping arm are each divided into an anti-skid tooth face and a clamping smooth face in the width direction, and the anti-skid tooth face and the clamping smooth face of the first clamping arm and the anti-skid tooth face and the clamping smooth face of the second clamping arm are arranged in a one-to-one correspondence mode or in a crossed correspondence mode. According to the utility model, the clamping surfaces of the two clamping arms of the closing clamp are divided into the anti-slip tooth surfaces and the clamping smooth surfaces, so that the clamping pressure of the closing clamp on vascular tissues during closing is reduced, unnecessary damage to the tissues in the process of closing the tissues is effectively avoided, and hemostasis failure caused by tearing of the vascular tissues is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a medical tissue ligature clamp, more specifically to a closed clamp capable of preventing tissue tearing. BACKGROUND

[0002] The closed clamp, also known as a blood vessel clamp, a ligature clamp, a hemostat, etc., is used to clamp and close blood vessels and duct tissues in surgical operations (mainly minimally invasive laparoscopic surgery). For example, it is used to clamp and close the cystic duct and cystic artery in cholecystectomy of patients with cholecystitis, calculous cholecystitis and gallbladder polyps, thereby achieving hemostasis and ligation.

[0003] The closed clamp is usually made of a high polymer material and has a V-shaped buckle device. The two ends of the two clamp arms are respectively provided with a clamping groove and a barb, which are used to buckle and lock when the two clamp arms are closed. An anti-slip unit is generally arranged on the clamping surface of the two clamp arms. When the closed clamp completely wraps around the blood vessels or body cavity tissues, enough force is applied on the handle of the clamp applier, the closed clamp is closed under the action of the force, the barb slides into the clamping groove, the anti-slip units are engaged with each other, and finally the blood vessels or body cavity tissues are ligated and closed. The traditional ligature clamp generally has an anti-slip unit arranged on the entire clamping surface. For example, the "tissue clamp" disclosed in Chinese patent application No. 201110023843.X (application publication date: April 27, 2011) and the "hemostat" disclosed in Chinese patent No. 201420105037.6 (grant announcement date: August 20, 2014) and the like. The clamping surfaces of these closed clamps are designed with different heights of concave and convex surfaces, and the anti-slip units are arranged on each concave and convex surface. When closed, the anti-slip units are in contact with the clamping surface by interlacing, and the contact is mostly point contact. When the closed clamp is closed under the action of the force, the contact area with the tissue is small, the closing pressure is too large, and the closed clamp generally penetrates the tissue, increasing the healing difficulty of the ligated tissue. When the clamped tissue is too large or too thick, the closed clamp cannot be normally closed or is popped open, which may cause bleeding or unnecessary damage to the tissue, not only affecting the normal progress of the operation, leading to a delay in the operation time, but also endangering the life safety of the patient. This brings great safety hazards to the patient and also brings psychological pressure to the surgeon.

[0004] The search found that there is also a pre-pressing ligature clip in the prior art, such as the "a ligature clip with a pre-pressing structure" (the authorization announcement date is January 14, 2022) disclosed by Chinese patent No. 202121446511.8, the clamping surface of the upper and lower clamping arms is provided with a plurality of anti-skid units, the anti-skid unit includes an anti-skid groove opened on the clamping surface and a pre-pressing spring plate arranged on the side wall of the anti-skid groove, when the upper clamping arm and the lower clamping arm are closed, the pre-pressing spring plate is deformed under stress, and a lateral springback force is provided to the clamped tissue, which can further clamp the tissue and prevent the tissue from slipping. The ligature clip can prevent the anti-skid unit from penetrating the tissue to a certain extent, but the structure design of the pre-pressing spring plate is complex, the material of the absorbable ligature clip is relatively soft, and it is difficult to form the pre-pressing spring plate on the clamping arm, and whether the spring property of the pre-pressing spring plate can realize effective springback force is also questionable. SUMMARY

[0005] 1. Technical problem to be solved by the utility model

[0006] The utility model aims at overcoming the above-mentioned shortcomings of the existing ligature clip, and provides a closed clamp capable of preventing tissue tearing, which adopts the technical scheme of the utility model, divides the clamping surface of the two clamping arms of the closed clamp into anti-skid tooth surface and clamping smooth surface two parts, reduces the clamping pressure of the closed clamp on the blood vessel tissue during closure, effectively avoids unnecessary damage to the tissue during closure of the tissue, and prevents tearing of the blood vessel tissue.

[0007] 2. Technical scheme

[0008] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0009] The utility model relates to a closed clamp capable of preventing tissue tearing, which comprises a first clamping arm and a second clamping arm connected through a connecting part at the proximal end, the distal end of the first clamping arm and the distal end of the second clamping arm are respectively provided with locking structures capable of being buckled and locked together, wherein:

[0010] The clamping surface of the first clamping arm and the second clamping arm is divided into anti-skid tooth surface and clamping smooth surface two parts along the width direction, the anti-skid tooth surface and the clamping smooth surface of the first clamping arm are respectively arranged one by one or cross correspondingly with the anti-skid tooth surface and the clamping smooth surface of the second clamping arm.

[0011] Further, the tooth top of the anti-skid tooth surface is flush with or slightly lower than the clamping smooth surface on the same clamping arm.

[0012] Further, the anti-skid tooth surface and the clamping smooth surface on the first clamping arm and the second clamping arm are arranged one by one, and when the clamping smooth surfaces on the first clamping arm and the second clamping arm are in close contact with each other, a clamping gap S is left between the anti-skid tooth surfaces on the first clamping arm and the second clamping arm.

[0013] Further, the clamping gap S is not greater than 0.5 mm.

[0014] Further, the clamping surfaces of the first and second clamping arms are arc-shaped or planar.

[0015] Further, the tooth shape of the anti-skid tooth surface is one or a combination of trapezoidal teeth, triangular teeth, semicircular teeth, wavy teeth and long-short combined teeth.

[0016] Further, the distal end of the first clamping arm and the distal end of the second clamping arm are each provided with a clamping column protruding laterally, and a transition chamfer is provided between the root of the clamping column and the corresponding clamping arm.

[0017] Further, the distal end of the first clamping arm and the distal end of the second clamping arm are each provided with a clamping column protruding laterally, and a transition chamfer is provided between the root of the clamping column and the corresponding clamping arm.

[0018] Further, the proximal ends of the first and second clamping arms are connected by an arc-shaped hinge, the distal end of the first clamping arm is respectively provided with first left and right limiting teeth and an anti-unclamping hook A, and the distal end of the second clamping arm is respectively provided with second left and right limiting teeth and an anti-unclamping hook A; when the first and second clamping arms are closed, the first and second left and right limiting teeth are engaged with each other, and the anti-unclamping hooks A and the anti-unclamping hooks A are locked with each other.

[0019] Further, the first clamping arm and / or the second clamping arm has a hollow cavity below the clamping surface.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical scheme has the following remarkable effects:

[0022] (1) The closed clamp capable of preventing tissue tearing comprises a first clamping arm and a second clamping arm connected through a connecting portion at the proximal end, the distal end of the first clamping arm and the distal end of the second clamping arm are respectively provided with locking structures capable of being buckled and locked together, the clamping surfaces of the first and second clamping arms are each divided into an anti-skid tooth surface and a clamping smooth surface along the width direction, the anti-skid tooth surface and the clamping smooth surface of the first clamping arm are respectively and correspondingly arranged or cross correspondingly arranged with the anti-skid tooth surface and the clamping smooth surface of the second clamping arm, by dividing the clamping surfaces of the two clamping arms of the closed clamp into the anti-skid tooth surface and the clamping smooth surface, the clamping pressure of the closed clamp on the blood vessel tissue during closing is reduced, unnecessary damage to the tissue during closing the tissue is effectively avoided, and blood vessel tissue tearing leading to hemostasis failure is prevented.

[0023] (2) The utility model discloses a kind of closed clamps of preventing tissue tearing, its anti-skid tooth surface crest is flush with or slightly lower than the clamping smooth surface on the same arm, in the case where guaranteeing that blood vessel tissue is stably closed, the anti-skid performance and tissue anti-tearing property of closed clamp are considered;

[0024] (3) The utility model discloses a kind of closed clamps of preventing tissue tearing, its anti-skid tooth surface and clamping smooth surface on the first arm and the second arm are set one by one, and when the clamping smooth surface on the first arm and the second arm mutually adhere, anti-skid tooth surface between the first arm and the second arm leaves clamping gap S, so as to utilize the adhesion of clamping smooth surface to close tissue, simultaneously utilize anti-skid tooth surface to prevent closed clamp from sliding, can effectively reduce the pressure to closed blood vessel tissue, further reduce the tearing risk of blood vessel tissue in the process of closing;

[0025] (4) The utility model discloses a kind of closed clamps of preventing tissue tearing, the clamping surface of the first arm and the second arm is arc surface or plane, the tooth shape of anti-skid tooth surface is one or more combinations in trapezoidal tooth, triangular tooth, semicircular tooth, wave tooth and long-short combination tooth, can satisfy different use demand;

[0026] (5) The utility model discloses a kind of closed clamps of preventing tissue tearing, the distal end of the first arm and the distal end of the second arm are equipped with the clamping column that protrudes to side, and the root of clamping column is equipped with transition chamfer between corresponding arm;Or, the distal end of the first arm and / or the distal end of the second arm is located outside corresponding clamping column and is also equipped with the stress bulge that protrudes outward;Transition chamfer can improve the stress intensity of clamping column, avoid the problem that clamping column root is easily deformed and broken, ensure that closed clamp can be stably closed;Stress bulge can increase the contact of clamping arm and forceps head, increase the stress position of clamping arm, avoid that clamping column is broken and fails due to excessive stress, also improve the closing stability and reliability of closed clamp;

[0027] (6) The utility model discloses a kind of closed clamps of preventing tissue tearing, the proximal end of the first arm and the second arm is connected by arc hinge, arc hinge is not easy to break, and clamping stability is better;And, through the left and right limiting teeth of clamping distal end, it can prevent two arms from deviating, ensure that closed reliability is guaranteed;

[0028] (7) The utility model discloses a kind of closed clamps of preventing tissue tearing, first arm and / or second arm have hollow cavity below clamping surface, on the premise that guaranteeing the clamping force of closed clamp, when clamping greater hardness or thickness tissue blood vessel, it can be self-adapting deformation, prevent closed clamp from being opened or falling off due to improper operation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1It is one angle three-dimensional structure schematic view of the closure clamp capable of preventing tissue tearing of the embodiment 1 in the utility model;

[0030] Figure 2 It is another angle three-dimensional structure schematic view of the closure clamp capable of preventing tissue tearing of the embodiment 1 in the utility model;

[0031] Figure 3 It is the opening state front view of the closure clamp capable of preventing tissue tearing of the embodiment 1 in the utility model;

[0032] Figure 4 It is the closure state three-dimensional structure schematic view of the closure clamp capable of preventing tissue tearing of the embodiment 1 in the utility model;

[0033] Figure 5 It is the closure state front view of the closure clamp capable of preventing tissue tearing of the embodiment 1 in the utility model;

[0034] Figure 6 It is the three-dimensional structure schematic view of the closure clamp of the embodiment 1 in the utility model and adopting semicircular tooth shape;

[0035] Figure 7 It is the opening state front view of the closure clamp of the embodiment 1 in the utility model and adopting semicircular tooth shape;

[0036] Figure 8 It is the three-dimensional structure schematic view of the closure clamp of the embodiment 1 in the utility model and adopting triangular tooth shape;

[0037] Figure 9 It is the opening state front view of the closure clamp of the embodiment 1 in the utility model and adopting triangular tooth shape;

[0038] Figure 10 It is the three-dimensional structure schematic view of the closure clamp of the embodiment 1 in the utility model and adopting wave tooth shape;

[0039] Figure 11 It is the opening state front view of the closure clamp of the embodiment 1 in the utility model and adopting wave tooth shape;

[0040] Figure 12 It is the three-dimensional structure schematic view of the closure clamp of the embodiment 1 in the utility model and adopting long and short combination tooth shape;

[0041] Figure 13 It is the opening state front view of the closure clamp of the embodiment 1 in the utility model and with unilateral stress protrusion;

[0042] Figure 14 It is the opening state front view of the closure clamp of the embodiment 1 in the utility model and with bilateral stress protrusion;

[0043] Figure 15 It is the three-dimensional structure schematic view of the closure clip capable of preventing tissue tearing of the embodiment 2 in the utility model;

[0044] Figure 16 It is the opening state front view of the closure clip capable of preventing tissue tearing of the embodiment 2 in the utility model;

[0045] Figure 17 It is the closed state three-dimensional structure schematic view of the closure clip capable of preventing tissue tearing of the embodiment 2 in the utility model;

[0046] Figure 18 It is the closed state front view of the closure clip capable of preventing tissue tearing of the embodiment 2 in the utility model;

[0047] Figure 19 It is the three-dimensional structure schematic view of the closure clip of the embodiment 2 in the utility model using semicircular tooth shape;

[0048] Figure 20 It is the opening state front view of the closure clip of the embodiment 2 in the utility model using semicircular tooth shape;

[0049] Figure 21 It is the three-dimensional structure schematic view of the closure clip of the embodiment 2 in the utility model using triangular tooth shape;

[0050] Figure 22 It is the opening state front view of the closure clip of the embodiment 2 in the utility model using triangular tooth shape;

[0051] Figure 23 It is the three-dimensional structure schematic view of the closure clip of the embodiment 2 in the utility model using wave tooth shape;

[0052] Figure 24 It is the opening state front view of the closure clip of the embodiment 2 in the utility model using wave tooth shape;

[0053] Figure 25 It is the three-dimensional structure schematic view of the closure clip capable of preventing tissue tearing of the embodiment 3 in the utility model;

[0054] Figure 26 It is the opening state front view of the closure clip capable of preventing tissue tearing of the embodiment 3 in the utility model;

[0055] Figure 27 It is the closed state three-dimensional structure schematic view of the closure clip capable of preventing tissue tearing of the embodiment 3 in the utility model;

[0056] Figure 28 It is the closed state front view of the closure clip capable of preventing tissue tearing of the embodiment 3 in the utility model;

[0057] Figure 29 It is the three-dimensional structure schematic view of the closure clamp adopting the semicircular tooth shape in the embodiment 3 of the utility model;

[0058] Figure 30 It is the main view of the open state of the closure clamp adopting the semicircular tooth shape in the embodiment 3 of the utility model;

[0059] Figure 31 It is the three-dimensional structure schematic view of the closure clamp adopting the triangular tooth shape in the embodiment 3 of the utility model;

[0060] Figure 32 It is the main view of the open state of the closure clamp adopting the triangular tooth shape in the embodiment 3 of the utility model;

[0061] Figure 33 It is the three-dimensional structure schematic view of the closure clamp adopting the wave tooth shape in the embodiment 3 of the utility model;

[0062] Figure 34 It is the main view of the open state of the closure clamp adopting the wave tooth shape in the embodiment 3 of the utility model;

[0063] Figure 35 It is the three-dimensional structure schematic view of the closure clamp of preventing tissue tearing in the embodiment 4 of the utility model.

[0064] The label explanation in the schematic view is as follows:

[0065] 1, first clamping arm; 2, second clamping arm; 3, anti-skid tooth surface; 4, clamping smooth surface; 5, clamping groove; 6, clamping hook; 7, anti-offset protrusion; 8, anti-offset groove; 9, positioning protrusion; 10, positioning groove; 11, clamping column; 11a, transition chamfer; 11b, stress protrusion; 12, arc-shaped hinge; 13, first left-right limiting tooth; 14, second left-right limiting tooth; 15, anti-unclamping A; 16, anti-unclamping hook A; 17, anti-unclamping B; 18, anti-unclamping hook B; 19, hollow cavity. DETAILED DESCRIPTION

[0066] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings and embodiments.

[0067] [Embodiment 1]

[0068] Figures 1 to 14 It is the structure schematic view of the closure clamp of preventing tissue tearing in the embodiment. Referring to Figures 1 to 5As shown in the drawings, the closure clip of the embodiment can prevent tissue tearing, which comprises a first clip arm 1 and a second clip arm 2 connected through a connecting portion, the first clip arm 1 and the second clip arm 2 are connected to form a V-shaped structure, the end of the first clip arm 1 and the second clip arm 2 connected is called "proximal end", and the other end is called "distal end", the distal end of the first clip arm 1 and the distal end of the second clip arm 2 are respectively provided with locking structures capable of being buckled and locked together, which can lock the distal end of the first clip arm 1 and the distal end of the second clip arm 2 together, and then use the two clip arms to clamp and close the blood vessel or other body cavity tissue. The clamping surfaces of the first clip arm 1 and the second clip arm 2 are both divided into anti-skid tooth surface 3 and clamping smooth surface 4 along the width direction, the anti-skid tooth surface 3 has a tooth structure, and the clamping smooth surface 4 is a clamping surface without tooth structure, the anti-skid tooth surface 3 and the clamping smooth surface 4 of the first clip arm 1 are respectively arranged corresponding to the anti-skid tooth surface 3 and the clamping smooth surface 4 of the second clip arm 2. The so-called "one-to-one correspondence" means that when the closure clip is closed, the anti-skid tooth surface 3 of the first clip arm 1 is opposite to the anti-skid tooth surface 3 of the second clip arm 2, and the clamping smooth surface 4 of the first clip arm 1 is opposite to the clamping smooth surface 4 of the second clip arm 2. By dividing the clamping surfaces of the two clip arms of the closure clip into anti-skid tooth surface 3 and clamping smooth surface 4, the clamping pressure of the closure clip on the blood vessel tissue during closure is reduced, unnecessary damage to the tissue during closure is effectively avoided, and blood loss caused by tearing of the blood vessel tissue is prevented.

[0069] Referring to Figure 1 and Figure 2 As a preferred embodiment, the tooth top of the anti-skid tooth surface 3 is flush with or slightly lower than the clamping smooth surface 4 on the same clip arm, so that the clamping smooth surfaces 4 of the two clip arms can be attached when the closure clip is closed, and the clamping smooth surface 4 generates clamping and closing force on the tissue, and the anti-skid tooth surface 3 is partially engaged on the tissue, which ensures the stable closure of the blood vessel tissue and takes into account the anti-skid performance and tissue anti-tearing property of the closure clip. It is preferable that the tooth shape of the anti-skid tooth surface 3 on the first clip arm 1 and the second clip arm 2 is arranged staggered, which is more conducive to the anti-skid of the closure clip.

[0070] Referring to Figure 4 and Figure 5 As shown in the drawings, in the embodiment, when the clamping smooth surfaces 4 on the first clip arm 1 and the second clip arm 2 are attached to each other, a clamping gap S is left between the anti-skid tooth surfaces 3 on the first clip arm 1 and the second clip arm 2, so that the attachment of the clamping smooth surface 4 can be used to close the tissue, and the anti-skid tooth surface 3 can be used to prevent the closure clip from sliding, which can effectively reduce the pressure on the closed blood vessel tissue and further reduce the risk of tearing of the blood vessel tissue during closure. Preferably, the above-mentioned clamping gap S is not greater than 0.5 mm, so that the anti-skid tooth surface 3 can reliably engage on the blood vessel tissue and avoid excessive pressure penetration of the tissue.

[0071] The first clamping surface and the second clamping surface of the first clamping arm 1 and the second clamping arm 2 of the tissue-tear-preventing closure clip of the embodiment are in the shape of an arc surface or a plane. Figure 3 As shown in the drawings, the clamping surface of the embodiment is preferably in the shape of an arc surface, so that the clamping force of the clamping arm on the blood vessel tissue is better, and the clamping is more stable, and the closure clip of the absorbable material is particularly suitable.

[0072] The tooth shape of the anti-skid tooth surface 3 can be one or a combination of trapezoidal teeth, triangular teeth, semicircular teeth, wavy teeth and long-short combination teeth, which can meet different use requirements. Figures 1 to 5 The specific embodiment of the trapezoidal teeth is shown, Figure 6 and Figure 7 The specific embodiment of the semicircular tooth shape is shown, Figure 8 and Figure 9 The specific embodiment of the triangular tooth shape is shown, Figure 10 and Figure 11 The specific embodiment of the wavy tooth shape is shown, Figure 12 The specific embodiment of the long-short combination teeth is shown. Figure 12 The long-short combination teeth in the specific embodiment are in the shape of triangular teeth, but the utility model is not limited to using triangular teeth as the tooth shape of the long-short combination teeth, and other shapes such as trapezoidal teeth and semicircular teeth can also be used as the tooth shape of the long-short combination teeth.

[0073] The Figures 1 to 14 As shown in the drawings, in the embodiment, the distal end of the first clamping arm 1 and the distal end of the second clamping arm 2 are both provided with a clamping column 11 protruding laterally, the clamping column 11 is used for cooperating with the jaw of the clip applier to realize the positioning of the closure clip on the jaw, and facilitates the clamping operation of the closure clip in cooperation with the clip applier. Figure 12 As shown in the drawings, as an improved idea, a transition chamfer 11a is arranged between the root of the clamping column 11 and the corresponding clamping arm, the transition chamfer 11a can improve the stress strength of the clamping column 11, avoid the problem of easy deformation and fracture of the root of the clamping column 11, and ensure that the closure clip can be stably closed. Figure 13 and Figure 14 Another improved idea is given, in order to reduce the stress on the clamping column 11 of the first clamping arm 1 and the second clamping arm 2, an outwardly protruding stress protrusion 11b is arranged on the outer side of the corresponding clamping column 11 at the distal end of the first clamping arm 1 and / or the distal end of the second clamping arm 2, Figure 13 The way of arranging the stress protrusion 11b on one side is given, Figure 14The design features force-bearing protrusions 11b on both sides. When used with clamping pliers, the presence of these protrusions allows the clamping pliers' jaw arms to contact them. During closure, the closing force of the clamping jaws is primarily applied to the force-bearing protrusions 11b. This increases the contact between the clamping arms and the clamping pliers' jaws, expands the force-bearing positions of the clamping arms, and prevents the clamping post 11 from breaking due to excessive force, thus improving the closure stability and reliability of the clamping pliers.

[0074] In addition, such as Figures 1 to 14 As shown, in this embodiment, the locking structure includes a slot 5 located at the distal end of the first clamping arm 1 and a hook 6 located at the distal end of the second clamping arm 2 that can engage with the slot 5. The hook 6 is approximately in the shape of an inverted "U" and has a mating slope at the distal end face of the first clamping arm 1. When closed, the hook 6 can engage with the slot 5 under the guidance of the mating slope, thereby improving the reliability of the closing and locking. In addition, an anti-displacement protrusion 7 is provided on one side of the slot 5, and an anti-displacement groove 8 is provided on the inner side of the hook 6. When the two clamping arms are closed, the anti-displacement protrusion 7 can be engaged in the anti-displacement groove 8 to prevent the two clamping arms from shifting to one side and causing them to loosen. At the same time, a positioning protrusion 9 is provided on the inner side of the distal end of the first clamping arm 1, and a positioning groove 10 that cooperates with the positioning protrusion 9 is provided on the inner side of the distal end of the second clamping arm 2. When the two clamping arms are closed, the positioning protrusion 9 can be engaged in the positioning groove 10 to prevent the two clamping arms from shifting from the other side. This effectively prevents the two clamping arms from sliding left and right and causing accidental opening, further improving the closure reliability of the clamping clip. A pointed structure is also provided on the outer side of the hook 6, which can separate other tissues connected to blood vessels or body cavity tissues, avoiding the problem of clamping too much unnecessary tissue and reducing the closure reliability of the clamping clip.

[0075] [Example 2]

[0076] Figures 15 to 24 This is a schematic diagram of a closed clip that can prevent tissue tearing according to this embodiment. This embodiment provides another closed clip design, the main difference from Embodiment 1 above is:

[0077] In this embodiment, the first clamping arm 1 and the second clamping arm 2 are thinner and have a flat overall shape, reducing the volume of the closure clip and the foreign body sensation in the body. The proximal ends of the first clamping arm 1 and the second clamping arm 2 are connected by an arc-shaped hinge 12, which is not prone to breaking and has better clamping stability. The distal end of the first clamping arm 1 is provided with first left and right limiting teeth 13 and a anti-unclipping hook A15, and the distal end of the second clamping arm 2 is provided with second left and right limiting teeth 14 and an anti-unclipping hook A16; when the first clamping arm 1 and the second clamping arm 2 are closed, the first left and right limiting teeth 13 and the second left and right limiting teeth 14 are engaged with each other, and the anti-unclipping hook A16 and the anti-unclipping hook A15 are locked with each other. The first left and right limiting teeth 13 and the second left and right limiting teeth 14 are each provided with two, which can limit the clamping arm from left and right directions, preventing the first clamping arm 1 and the second clamping arm 2 from shifting laterally and causing the anti-unclipping hook A16 and the anti-unclipping hook A15 to loosen.

[0078] In this embodiment, the clamping surfaces of the first clamping arm 1 and the second clamping arm 2 are planar, and the anti-slip tooth surfaces 3 and the clamping smooth surfaces 4 are provided on the clamping surfaces of the first clamping arm 1 and the second clamping arm 2. Similarly, when the clamping smooth surfaces 4 on the first clamping arm 1 and the second clamping arm 2 are in close contact with each other, a clamping gap S (as shown in Figure 18 The tooth shape of the anti-slip tooth surface 3 can be one or a combination of trapezoidal teeth, triangular teeth, semicircular teeth, wavy teeth, and long-short combination teeth, similar to Embodiment 1. Figures 15 to 18 The specific embodiment of the trapezoidal teeth is shown, Figure 19 The specific embodiment of the triangular teeth is shown, Figure 20 The specific embodiment of the semicircular teeth is shown, Figure 21 The specific embodiment of the wavy teeth is shown, Figure 22 The specific embodiment of the triangular teeth is shown, Figure 23 The specific embodiment of the wavy teeth is shown. Figure 24 The specific embodiment of the wavy teeth is shown.

[0079] [Embodiment 3]

[0080] Figures 25 to 34 This is a structure diagram of a closure clip that can prevent tissue tearing. This embodiment provides a third type of closure clip design, which is mainly different from Embodiments 1 and 2 in that:

[0081] In this embodiment, the first clamping arm 1 and / or the second clamping arm 2 have a hollow cavity 19 below the clamping surface. As shown in Figures 25 to 28 The hollow cavity 19 is provided on the second clamping arm 2, which makes the clamping surface of the second clamping arm 2 have better elastic deformation capability. Under the premise of ensuring the clamping force of the closure clip, it can adaptively deform when clamping a tissue or blood vessel with large hardness or thickness, preventing the closure clip from being pried open or falling off due to improper operation.

[0082] The locking structure at the distal end of the first and second clamping arms 1 and 2 comprises an anti-unclamping hook B18 on the second clamping arm 2 and an anti-unclamping hook B17 on the first clamping arm 1. When closed, the anti-unclamping hook B18 is clamped on the anti-unclamping hook B17, achieving stable clamping of the closure clip. In this embodiment, the clamping surfaces of the first and second clamping arms 1 and 2 are also planar, and the anti-slip tooth surface 3 and the clamping smooth surface 4 are arranged on the clamping surfaces of the first and second clamping arms 1 and 2. Similarly, when the clamping smooth surfaces 4 on the first and second clamping arms 1 and 2 are in close contact with each other, there is a clamping gap S (as shown) between the anti-slip tooth surfaces 3 on the first and second clamping arms 1 and 2. Figure 28 Similarly to Embodiment 1, the tooth shape of the anti-slip tooth surface 3 can be one or a combination of trapezoidal teeth, triangular teeth, semicircular teeth, wavy teeth, and long-short combination teeth. Figures 25 to 28 The specific embodiment of trapezoidal teeth is shown. Figure 29 The specific embodiment of triangular teeth is shown. Figure 30 The specific embodiment of semicircular teeth is shown. Figure 31 The specific embodiment of wavy teeth is shown. Figure 32 The specific embodiment of long-short combination teeth is shown. Figure 33 The specific embodiment of triangular teeth is shown. Figure 34 The specific embodiment of wavy teeth is shown.

[0083] [Embodiment 4]

[0084] Figure 35 The structure of a closure clip that can prevent tissue tearing in this embodiment is shown. In this embodiment, the anti-slip tooth surface 3 and the clamping smooth surface 4 of the first clamping arm 1 are arranged in cross-corresponding relationship with the anti-slip tooth surface 3 and the clamping smooth surface 4 of the second clamping arm 2. By "cross-corresponding relationship", it is meant that, when the closure clip is closed, the anti-slip tooth surface 3 of the first clamping arm 1 is opposite the clamping smooth surface 4 of the second clamping arm 2, and the clamping smooth surface 4 of the first clamping arm 1 is opposite the anti-slip tooth surface 3 of the second clamping arm 2. This cross-corresponding design can increase the gripping force, and the anti-slip tooth surface 3 and the clamping smooth surface 4 can be used to clamp the tissue, taking into account both the stability of tissue closure and the prevention of tissue tearing.

[0085] The other structures of the closure clip in this embodiment are the same as in Embodiment 1. It should be noted that, although the closure clip shown is of the structure of Embodiment 1, the structure of "anti-slip tooth surface 3 and clamping smooth surface 4 arranged in cross-corresponding relationship" in this embodiment is also applicable to the structures of Embodiments 2 and 3. Figure 35 The other structures of the closure clip in this embodiment are the same as in Embodiment 1. It should be noted that, although the closure clip shown is of the structure of Embodiment 1, the structure of "anti-slip tooth surface 3 and clamping smooth surface 4 arranged in cross-corresponding relationship" in this embodiment is also applicable to the structures of Embodiments 2 and 3.

[0086] The utility model discloses a kind of closed clamps of preventing tissue tearing, the clamping surface of two clamping arms of closed clamp is divided into two parts of anti-skid tooth surface and clamping smooth surface, reduce the clamping pressure of closed clamp received when blood vessel tissue is closed, effectively avoid unnecessary damage to tissue in the process of closing tissue, prevent the tearing of blood vessel tissue, while it can guarantee blood vessel tissue stable closure, improve the closure stability and reliability of closed clamp.

[0087] The above has described the utility model and its implementation mode schematically, which is not restrictive, and the drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the spirit of the invention, similar structural modes and embodiments are designed without creativity, which shall belong to the protection scope of the utility model.

Claims

1. A closure clamp capable of preventing tissue tearing, comprising a first clamp arm (1) and a second clamp arm (2) connected by a connecting portion at the proximal end, the distal end of the first clamp arm (1) and the distal end of the second clamp arm (2) are respectively provided with locking structures capable of being locked together, characterized in that: the clamping surface of the first clamp arm (1) and the second clamp arm (2) is divided into anti-skid tooth surface (3) and clamping smooth surface (4) along the width direction, the anti-skid tooth surface (3) and the clamping smooth surface (4) of the first clamp arm (1) are respectively arranged or cross-correspondingly arranged with the anti-skid tooth surface (3) and the clamping smooth surface (4) of the second clamp arm (2). The tooth top of the anti-skid tooth surface (3) is flush with or slightly lower than the clamping smooth surface (4) on the same clamp arm.

2. The cleave-resistant closure clip of claim 1, wherein: The anti-skid tooth surface (3) and the clamping smooth surface (4) on the first clamp arm (1) and the second clamp arm (2) are arranged one by one, and when the clamping smooth surfaces (4) on the first clamp arm (1) and the second clamp arm (2) are in close contact with each other, the anti-skid tooth surfaces (3) on the first clamp arm (1) and the second clamp arm (2) leave a clamping gap S.

3. The cleave-resistant closure clip of claim 1, wherein: The clamping gap S is not greater than 0.5mm.

4. The cleave-resistant closure clip of Claim 3, wherein: The clamping surface of the first clamp arm (1) and the second clamp arm (2) is arc-shaped or planar.

5. The closure clip of any one of claims 1 to 4, wherein: The tooth shape of the anti-skid tooth surface (3) is one or a combination of trapezoidal teeth, triangular teeth, semicircular teeth, wavy teeth, and long-short combination teeth.

6. The closure clip of any one of claims 1 to 4, wherein: The distal end of the first clamp arm (1) and the distal end of the second clamp arm (2) are both provided with a clamping column (11) protruding laterally, and a transition chamfer (11a) is provided between the root of the clamping column (11) and the corresponding clamp arm.

7. The closure clip of any one of claims 1 to 4, wherein: The distal end of the first clamp arm (1) and the distal end of the second clamp arm (2) are both provided with a clamping column (11) protruding laterally, and a transition chamfer (11a) is provided between the root of the clamping column (11) and the corresponding clamp arm.

8. The closure clip of any one of claims 1 to 4, wherein: The proximal end of the first clamp arm (1) and the second clamp arm (2) is connected by an arc-shaped hinge (12), the distal end of the first clamp arm (1) is respectively provided with a first left-right limiting tooth (13) and a anti-unclamping A (15), the distal end of the second clamp arm (2) is respectively provided with a second left-right limiting tooth (14) and a anti-unclamping A (16); when the first clamp arm (1) and the second clamp arm (2) are closed, the first left-right limiting tooth (13) and the second left-right limiting tooth (14) are engaged with each other, and the anti-unclamping A (16) and the anti-unclamping A (15) are locked with each other.

9. The closure clip of any one of claims 1 to 4, wherein: The first clamp arm (1) and / or the second clamp arm (2) has a hollow cavity (19) below the clamping surface.

10. The closure clip of any one of claims 1 to 4, wherein: ​

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