Tissue closure clip

Abstract

The invention relates to a tissue closing clamp which comprises a first pressing arm, a second pressing arm and a clamping arm, the near end of the first pressing arm is connected with the near end of the second pressing arm, the clamping arm is arranged between the first pressing arm and the second pressing arm, the far end of the clamping arm is connected to the far end of the first pressing arm, and the clamping arm extends in the length direction of the second pressing arm. And the clamping arm is in elastic contact with the second pressing arm under the initial working condition. Compared with an existing closing clamp, the tissue closing clamp has the advantages that the clamping arms and the pressing arm on one side are directly used for clamping tissue, the radial size of the tissue closing clamp is reduced, the overall size and weight of the tissue closing clamp are reduced, and the problem that the existing closing clamp is large in size and weight is solved.

Description

[0001] The present invention claims priority to an application filed by the applicant, filed on November 9, 2023, with application number CN202311485920.2, and entitled “TISSUE CLOSURE CLIP”. The entire contents of the above application are incorporated herein by reference in their entirety. Technical Field

[0002] The invention belongs to the technical field of medical devices, and in particular relates to a tissue closing clip. Background Art

[0003] In clinical practice, it is often necessary to use clips to clamp or block tissues, such as using clips to close blood vessel tissues, valve tissues, atria, left atrial appendages, etc. In this process, a special delivery device is required to deliver the closure clip into the human body and open it to capture the target tissue, so that the target tissue is clamped in the closure clip to complete the closure.

[0004] In the prior art, a single-ended opening closure clamp is usually clamped by a symmetrical two-side clamping structure. Such a closure clamp is large in size and weight, which not only makes the size of the surgical implantation path larger and is not conducive to delivery, but also has poor compliance when closing tissues, and has a greater risk of damaging tissues. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problem of large volume and weight of the existing closing clip. This purpose is achieved through the following technical solutions:

[0006] The present invention proposes a tissue closing clamp, which includes a first pressing arm, a second pressing arm and a clamp arm, wherein the proximal end of the first pressing arm is connected to the proximal end of the second pressing arm, the clamp arm is arranged between the first pressing arm and the second pressing arm, the distal end of the clamp arm is connected to the distal end of the first pressing arm, the clamp arm extends along the length direction of the second pressing arm, and the clamp arm is in elastic contact with the second pressing arm under the initial working condition.

[0007] According to the tissue closing clamp proposed in the embodiment of the present invention, the clamp arm is located between the first pressing arm and the second pressing arm. On the basis of the connection between the proximal ends of the first pressing arm and the second pressing arm, the proximal end of the tissue closing clamp can be adjusted by plastic deformation. On the basis of the connection between the clamp arm and the first pressing arm at the distal end, the clamp arm has a force biasing toward the second pressing arm, and then elastically contacts with the second pressing arm. When the tissue closing clamp is transported into the human body by a special transport device and opened, the tissue to be clamped, such as the left atrial appendage, is placed between the clamp arm and the second pressing arm. After that, the tissue closing clamp is released, and the clamp arm and the second pressing arm are brought close to each other to clamp the tissue. Since the clamp arm extends along the length direction of the second pressing arm, the tissue is fully and evenly contacted with the clamp arm and the second pressing arm, thereby ensuring a uniform clamping force. Moreover, compared with the existing closing clamp, the embodiment of the present invention directly uses the clamp arm and the one side pressing arm to clamp the tissue, which greatly reduces the radial size of the tissue closing clamp, thereby reducing the volume and weight of the tissue closing clamp, thereby solving the problem of large volume and weight of the existing closing clamp.

[0008] In addition, the tissue closing clip proposed in the embodiment of the present invention may also have the following technical features:

[0009] In some embodiments of the present invention, the clamping arm and the second pressing arm are provided with tissue clamping surfaces, and the tissue clamping surfaces are configured as a flat surface, a convex surface or a wavy surface.

[0010] In some embodiments of the present invention, the tissue closing clip further includes a U-shaped elastic member, and the U-shaped elastic member is respectively connected to the proximal end of the first pressing arm and the proximal end of the second pressing arm.

[0011] In some embodiments of the present invention, the tissue closing clip further comprises a compensating member, and the compensating member is disposed between the first pressing arm and the clamp arm.

[0012] In some embodiments of the present invention, the compensation member is configured as an elastic compensation sheet, which is disposed close to the proximal end of the tissue closure clip and connected to at least one of the first pressing arm and the clamp arm.

[0013] In some embodiments of the present invention, one end of the elastic compensation sheet is connected to the first pressure arm, and the other end of the elastic compensation sheet extends obliquely toward the proximal end and is connected to the clamping arm.

[0014] In some embodiments of the present invention, one end of the elastic compensation sheet is connected to the first pressure arm, the other end of the elastic compensation sheet extends obliquely toward the proximal end, and the elastic compensation sheet partially abuts against the clamping arm.

[0015] In some embodiments of the present invention, one end of the elastic compensation sheet is connected to the clamping arm, the other end of the elastic compensation sheet extends obliquely toward the distal end, and the elastic compensation sheet is partially in contact with the first pressure arm.

[0016] In some embodiments of the present invention, the compensation member is configured as a compensation column, which is configured as a rigid member or an elastic member. The compensation column is disposed near the distal end of the tissue closure clamp and is connected to the first pressure arm or the clamp arm.

[0017] In some embodiments of the present invention, the compensation column is configured as a rigid member, one end of which is connected to the clamping arm, and the other end of which extends toward the first pressure arm and can abut against the first pressure arm under a clamping condition.

[0018] In some embodiments of the present invention, the clamping arm is provided with a first loading mechanism, and the second pressing arm is provided with a second loading mechanism.

[0019] In some embodiments of the present invention, the first loading mechanism is a first loading hole, and the second loading mechanism is a second loading hole.

[0020] In some embodiments of the present invention, the first loading mechanism is a loading column, one end of which is arranged on the clamping arm, the other end of which passes through the through hole on the first pressing arm and extends to the outside of the first pressing arm, and the other end of the loading column is provided with a first loading hole, and the second loading mechanism is a loading block, which is arranged on the outside of the second pressing arm, and the loading block is provided with a second loading hole.

[0021] In some embodiments of the present invention, the first loading mechanism is a loading arm, one end of the loading arm is connected to the clamping arm, the other end of the loading arm is connected to the clamping arm after bypassing the first pressing arm, and a gap is left between the loading arm and the first pressing arm. The second loading mechanism is a loading block, the loading block is arranged on the outer side of the second pressing arm, and a loading hole is provided on the loading block.

[0022] In some embodiments of the present invention, the distal end of the clamp arm and the distal end of the first pressing arm are combined into one to form a guide end, and the thickness of the guide end gradually decreases in a direction from near to far. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0024] Figure 1It is a schematic diagram of the structure of the tissue closing clip in an unclosed state;

[0025] Figure 2 for Figure 1 A front view of the tissue closure clip shown;

[0026] Figure 3 It is a front view of the tissue closing clip of the first embodiment of the present invention in the initial working state;

[0027] Figure 4 for Figure 3 A front view of the tissue closure clamp shown in a clamping condition;

[0028] Figure 5 for Figure 3 The tissue closure clip is shown from the left Figure 1 ;

[0029] Figure 6 for Figure 3 The tissue closure clip is shown from the left Figure 2 ;

[0030] Figure 7 for Figure 3 The tissue closure clip is shown from the left Figure 3 ;

[0031] Figure 8 This is a schematic structural diagram of a tissue closing clip according to a second embodiment of the present invention;

[0032] Fig. 9 This is a front view of the tissue closing clip of the third embodiment of the present invention in the initial working condition;

[0033] Fig.10 It is a front view of the tissue closing clip of the fourth embodiment of the present invention in the initial working condition;

[0034] Fig.11 for Fig.10 A front view of the tissue closure clamp shown in a clamping condition;

[0035] Fig.12 This is a front view of the tissue closing clip of Embodiment 5 of the present invention in an initial working condition;

[0036] Fig.13 for Fig.12 A front view of the tissue closure clamp shown in a clamping condition;

[0037] Fig.14 It is a front view of the tissue closing clip of Example 6 of the present invention in the initial working condition;

[0038] Fig.15 for Fig.14 A front view of the tissue closure clamp shown in a clamping condition;

[0039] Fig.16 It is a front view of the tissue closing clip of Embodiment 7 of the present invention in the initial working condition;

[0040] Fig.17 for Fig.16 A front view of the tissue closure clamp shown in a clamping condition;

[0041] Fig.18 It is a front view of the tissue closing clip of the eighth embodiment of the present invention in the initial working condition;

[0042] Fig.19 This is a stereoscopic diagram of the tissue closing clip according to Embodiment 8 of the present invention in an initial working condition;

[0043] Fig. 20 It is a front view of the tissue closing clip of Embodiment 9 of the present invention in the initial working state;

[0044] Fig.21 This is a three-dimensional diagram of the tissue closing clip according to Embodiment 9 of the present invention in an initial working condition;

[0045] Fig. 22 It is a front view of the tissue closing clip of the tenth embodiment of the present invention in the initial working state;

[0046] Fig.23 This is a stereoscopic diagram of the tissue closing clip according to Embodiment 10 of the present invention in an initial working condition;

[0047] Fig.24 It is a front view of the tissue closing clip of the eleventh embodiment of the present invention in the initial working state;

[0048] Fig.25 This is a stereoscopic diagram of the tissue closing clip according to the eleventh embodiment of the present invention in the initial working condition;

[0049] Fig.26 It is a front view of the tissue closing clip of the twelfth embodiment of the present invention in the initial working state;

[0050] Fig. 27 This is a stereoscopic view of the tissue closing clamp according to the twelfth embodiment of the present invention in the initial working condition. DETAILED DESCRIPTION

[0051] As described in the background technology, in the prior art, a closing clamp with a single end opening usually adopts a symmetrical clamping structure on both sides to achieve clamping, which results in a large size and weight of the closing clamp, which is not conducive to transportation, and has poor compliance when closing tissues, and has a high risk of damaging tissues. In response to this, an embodiment of the present invention proposes a tissue closing clamp, which connects a clamp arm to a pressure arm on one side at a distal end, and ensures that the clamp arm and the clamp arm on the other side are in close contact with each other, thereby clamping the tissue using the clamping force generated therebetween. On the basis of ensuring that the tissue is clamped and closed, the radial size of the closing clamp is reduced, thereby reducing the size of the closing clamp and reducing the weight of the closing clamp.

[0052] The following will be combined with the drawings in the embodiments of the present invention. The terms used in the text are only for the purpose of describing specific example implementations and cannot be understood as limitations on the present invention. For example, the terms "including" and "having" not only indicate the existence of the stated features, but also do not exclude the existence of other features; the terms "first" and "second" do not imply order or sequence; the terms "inside", "outside", "above" and "below" are only for the convenience of describing the relationship between one feature shown in the drawings relative to another feature, and do not indicate that they must have a specific orientation. It should be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device in the natural state. In the description of the present invention, the above definitions are only for the convenience of expression and cannot be understood as limitations on the present invention.

[0053] Embodiment 1

[0054] See also Figures 1 to 4 Embodiment 1 of the present invention proposes a tissue closing clip 100, which includes a first pressing arm 10, a second pressing arm 20 and a clamp arm 30. The proximal end of the first pressing arm 10 is connected to the proximal end of the second pressing arm 20, the clamp arm 30 is arranged between the first pressing arm 10 and the second pressing arm 20, the distal end of the clamp arm 30 is connected to the distal end of the first pressing arm 10, the clamp arm 30 extends along the length direction of the second pressing arm 20, and the clamp arm 30 is in elastic contact with the second pressing arm 20 under the initial working condition.

[0055] In the tissue closing clip 100 proposed in the embodiment of the present invention, the clamp arm 30 is located between the first pressing arm 10 and the second pressing arm 20. On the basis of the proximal connection between the first pressing arm 10 and the second pressing arm 20, the proximal end of the tissue closing clip 100 can be adjusted by plastic deformation. On the basis of the distal connection between the clamp arm 30 and the first pressing arm 10, the clamp arm 30 has a force biasing toward the second pressing arm 20, and then elastically contacts with the second pressing arm 20. When the tissue closing clip 100 is delivered into the human body by a dedicated delivery device and opened, the tissue 70 to be clamped, such as the left atrial appendage, is placed between the clamp arm 30 and the second The clamp arm 30 and the second pressing arm 20 are respectively clamped together to clamp the tissue 70. As the clamp arm 30 extends along the length direction of the second pressing arm 20, the tissue 70 is fully and evenly in contact with the clamp arm 30 and the second pressing arm 20, thereby ensuring a uniform clamping force. In addition, compared with the existing closing clamp, the embodiment of the present invention directly uses the clamp arm 30 and the one side pressing arm to clamp, thereby greatly reducing the radial size of the tissue closing clamp 100, thereby reducing the volume and weight of the tissue closing clamp 100, and solving the problem of large volume and weight of the existing closing clamp.

[0056] like Figure 1 and Figure 2 As shown, the first pressing arm 10 and the second pressing arm 20 of the tissue closing clip 100 in this embodiment are symmetrically arranged, and the first pressing arm 10 and the second pressing arm 20 are connected at the proximal end, so as to form a U-shaped closing clip body, and the closing clip body can be opened and closed as the first pressing arm 10 and the second pressing arm 20 move away from and close to each other at the distal end. The tissue closing clip 100 in this embodiment can be made of elastic materials with good biocompatibility such as medical stainless steel, nickel-titanium alloy, titanium alloy (such as TC4, TC20) through wire cutting, electric spark, machining, etc.

[0057] Further, in this embodiment, the first pressing arm 10 and the second pressing arm 20 can be connected at the proximal end by an elastic member. For example, in some embodiments of the present invention, the tissue closing clip 100 further includes a U-shaped elastic member 40, such as Figure 1 and Figure 2 As shown, the U-shaped elastic member 40 is arranged at the proximal end of the tissue closure clip 100, and the two open ends of the U-shaped elastic member 40 are respectively connected to the proximal end of the first pressing arm 10 and the proximal end of the second pressing arm 20. The U-shaped elastic member 40 can be connected to the first pressing arm 10 and the second pressing arm 20 by welding or integral molding. The present embodiment does not specifically limit its connection method.

[0058] Based on the above embodiments, during the processing of the tissue closing clip 100, after the U-shaped elastic member 40 is connected to the first pressing arm 10 and the second pressing arm 20, respectively, the U-shaped elastic member 40 can be plastically deformed by heat treatment or physical methods, such as Figure 3As shown, the clamp arm 30 moves toward the second pressing arm 20 until the clamp arm 30 fits with the second pressing arm 20. It should be noted that in this embodiment, the elastic contact between the clamp arm 30 and the second pressing arm 20 means that the two are in contact and fit, and can provide pressure to each other. Figure 4 As shown, when clamping the tissue 70, elastic deformation can be generated according to the thickness of the tissue 70 and the tissue 70 can be clamped.

[0059] According to the above embodiment, since the clamp arm 30 cooperates with the second pressure arm 20 to directly clamp the tissue 70, compared with the existing closing clamp, the thickness of the distal end is thinner, that is, the radial dimension of the distal end is smaller, and the radial dimension of the U-shaped elastic member 40 connected to the proximal end is also correspondingly smaller. Therefore, the overall radial dimension of the tissue closing clamp 100 is smaller, and the volume and weight are correspondingly reduced. In addition, when the tissue closing clamp 100 proposed in this embodiment is delivered into the human body, the size of the surgical implantation path is smaller, thereby improving compliance and reducing the risk of tissue damage.

[0060] Further, in some embodiments of the present invention, the clamp arm 30 and the second pressure arm 20 are provided with tissue clamping surfaces. For example, the second pressure arm 20 is provided with a first tissue clamping surface 21 on the side facing the clamp arm 30, and the clamp arm 30 is provided with a second tissue clamping surface 31 on the side facing the second pressure arm 20. Figure 3 In the initial working condition, the first tissue clamping surface 21 is in contact with the second tissue clamping surface 31. Figure 4 In the clamping condition, the first tissue clamping surface 21 and the second tissue clamping surface 31 are used to directly contact the tissue 70 .

[0061] like Figure 5 As shown, in the first embodiment, the first tissue clamping surface 21 and the second tissue clamping surface 31 are both set as planes, and the planes can ensure sufficient contact and clamping with the tissue; Figure 6 As shown, in the second embodiment, the first tissue clamping surface 21 and the second tissue clamping surface 31 are both configured as arc-shaped convex surfaces, and in the initial working condition, the first tissue clamping surface 21 and the second tissue clamping surface 31 are at least partially in contact with each other in the radial direction, so that in the clamping working condition, the clamping force on the tissue can be ensured; Figure 7 As shown, in the third embodiment, the first tissue clamping surface 21 and the second tissue clamping surface 31 are both configured as wavy surfaces, and the first tissue clamping surface 21 and the second tissue clamping surface 31 are matched in the initial working condition, so that in the clamping working condition, sufficient contact and clamping with the tissue and the clamping strength of the tissue can be ensured. This embodiment does not specifically limit the shape of the tissue clamping surface, and it can be set according to actual conditions.

[0062] Embodiment 2

[0063] like Figure 8 As shown, on the basis of the first embodiment, the tissue closing clip 100 further includes a sleeve 101, which is sleeved on the tissue closing clip 100. The sleeve 101 sequentially covers the first pressing arm 10 and the clamp arm 30, the U-shaped elastic member 40, and the second pressing arm 20. In this embodiment, the sleeve 101 can be made of a biocompatible material.

[0064] Embodiment 3

[0065] like Fig. 9 As shown, based on the second embodiment, combined with the first embodiment and referring to Figure 3 and Figure 4 A first groove 11 is provided at the distal end of the first pressing arm 10, and a second groove 22 is provided at the distal end of the second pressing arm 20. The first groove 11 and the second groove 22 are used to connect with the sleeve 101, and are used to fix the end of the sleeve 101 after the sleeve 101 covers various parts of the tissue closure clip 100. The setting of the first groove 11 and the second groove 22 in this embodiment avoids more complicated assembly methods such as suturing and bonding, and further reduces the overall volume and weight of the tissue closure clip 100.

[0066] Furthermore, in some embodiments of the present invention, the tissue closing clip 100 further includes a compensation member, which is disposed between the first pressing arm 10 and the clamp arm 30. In this embodiment, the compensation member is used to compensate for the elastic force of the clamp arm 30, thereby further improving the clamping force on the tissue. In an optional embodiment, the compensation member is configured as an elastic compensation sheet 50, which is disposed near the proximal end of the tissue closing clip 100 and is connected to at least one of the first pressing arm 10 and the clamp arm 30.

[0067] Embodiment 4

[0068] like Fig.10 and Fig.11 As shown, in this embodiment, the elastic compensation sheet 50 is connected to the first pressing arm 10 and the clamping arm 30 respectively. Specifically, one end of the elastic compensation sheet 50 is connected to the first pressing arm 10, and is connected at a position close to the proximal end of the first pressing arm 10 and located on the inner side of the first pressing arm 10. The other end of the elastic compensation sheet 50 extends obliquely toward the proximal end of the tissue closure clamp 100, that is, the proximal end of the elastic compensation sheet 50 is inclined toward the direction of the U-shaped elastic member 40, and is connected to the clamping arm 30, and is connected at a position close to the proximal end of the clamping arm 30 and located at a position where the clamping arm 30 faces the first pressing arm 10, or is directly connected to the proximal end of the clamping arm 30. The elastic compensation sheet 50 can be connected to the first pressing arm 10 and the clamping arm 30 by welding or integral molding. The connection method is not specifically limited in this embodiment.

[0069] In this embodiment, by disposing an elastic compensation sheet 50 between the first pressing arm 10 and the clamping arm 30 near the proximal end, the clamping force of the middle part and the proximal part of the tissue closing clamp 100 on the tissue 70 is improved, and the uneven force when the clamping arm 30 contacts the tissue 70 is avoided, thereby further ensuring the uniformity of the clamping force of the clamping arm 30 when clamping the tissue 70. In this embodiment, the elastic compensation sheet 50 is connected to the first pressing arm 10 and the clamping arm 30 at the same time to ensure the stability of the elastic compensation sheet 50, thereby reducing the risk of damaging the tissue 70.

[0070] Embodiment 5

[0071] like Fig.12 and Fig.13 As shown, in this embodiment, one end of the elastic compensation sheet 50 is connected to the first pressure arm 10, and the other end is set as a free end. The elastic compensation sheet 50 and the first pressure arm 10 can be connected by welding or integral molding. This embodiment does not specifically limit the connection method.

[0072] Exemplarily, the distal end of the elastic compensation sheet 50 is connected to the first pressure arm 10, and is connected at a position close to the middle of the first pressure arm 10 and located on the inner side of the first pressure arm 10. The specific position of this end of the elastic compensation sheet 50 along the axial direction of the tissue closure clamp 100 can be set according to actual clamping requirements; the other end of the elastic compensation sheet 50 extends obliquely toward the proximal end of the tissue closure clamp 100, that is, the proximal end of the elastic compensation sheet 50 is inclined toward the direction of the U-shaped elastic member 40 until it abuts against the clamp arm 30.

[0073] It should be noted that, in this embodiment, the overall shape of the elastic compensation sheet 50 can be arc-shaped or arc-like, such as Fig.12 As shown, in the initial working state of the tissue closing clip 100, the proximal end portion of the elastic compensation sheet 50 abuts against the clamp arm 30, as shown in FIG. Fig.13 As shown, when the tissue closing clamp 100 is in a clamping state after clamping the tissue 70, due to the elastic deformation of the clamp arm 30 moving toward the first pressure arm 10, the elastic compensation sheet 50 is further bent by the pressure of the clamp arm 30, and its proximal part is more in contact with the clamp arm 30, thereby applying pressure to the clamp arm 30 and the tissue 70.

[0074] In this embodiment, by arranging the elastic compensation sheet 50 at a position close to the proximal end between the first pressing arm 10 and the clamping arm 30, the clamping force of the middle and proximal parts of the tissue closing clamp 100 on the tissue 70 is improved, and the problem of uneven force application when the clamping arm 30 contacts the tissue 70 is avoided, thereby ensuring the uniformity of the clamping force of the clamping arm 30 when clamping the tissue 70. In this embodiment, the elastic compensation sheet 50 is arranged as a free end on the side of the clamping arm 30, which increases the force application range of the elastic compensation sheet 50 on the clamping arm 30 in the length direction under the clamping condition, and further improves the uniformity and reliability of the clamping force of the proximal part of the tissue closing clamp 100.

[0075] Embodiment 6

[0076] like Fig.14 and Fig.15 As shown, in this embodiment, one end of the elastic compensation sheet 50 is connected to the clamp arm 30, and the other end is set as a free end. The elastic compensation sheet 50 and the clamp arm 30 can be connected by welding or integral molding. This embodiment does not specifically limit the connection method.

[0077] Exemplarily, one end of the elastic compensation sheet 50 is connected to the clamp arm 30, connected at a position close to the proximal end of the clamp arm 30 and located on the side of the clamp arm 30 facing the first pressure arm 10. The specific position of this end of the elastic compensation sheet 50 along the axial direction of the tissue closure clamp 100 can be set according to actual clamping requirements; the other end of the elastic compensation sheet 50 extends obliquely toward the distal end of the tissue closure clamp 100, that is, the distal end of the elastic compensation sheet 50 is inclined in a direction away from the U-shaped elastic member 40 until it abuts against the first pressure arm 10.

[0078] It should be noted that, in this embodiment, the overall shape of the elastic compensation sheet 50 can be arc-shaped or arc-like, such as Fig.14 As shown, in the initial working state of the tissue closing clip 100, the distal end portion of the elastic compensation sheet 50 abuts against the first pressing arm 10, as shown in FIG. Fig.15 As shown, when the tissue closing clamp 100 is in a clamping state after clamping the tissue 70, due to the elastic deformation of the clamp arm 30 moving toward the first pressure arm 10, the elastic compensation sheet 50 is further bent by the pressure of the clamp arm 30, and its distal portion is more in contact with the first pressure arm 10, thereby applying pressure in the reverse direction toward the clamp arm 30 and the tissue 70.

[0079] In this embodiment, by disposing the elastic compensation sheet 50 at a position close to the proximal end between the first pressing arm 10 and the clamping arm 30, the clamping force of the middle and proximal parts of the tissue closing clamp 100 on the tissue 70 is improved, and the problem of uneven force application when the clamping arm 30 contacts the tissue 70 is avoided, thereby ensuring the uniformity of the clamping force of the clamping arm 30 when clamping the tissue 70. In this embodiment, the elastic compensation sheet 50 is disposed as a free end on the side of the first pressing arm 10, which increases the force application range of the elastic compensation sheet 50 on the clamping arm 30 in the length direction under the clamping condition, and further improves the uniformity and reliability of the clamping force of the proximal part of the tissue closing clamp 100.

[0080] Embodiment 7

[0081] like Fig.16 and Fig.17 As shown, in some embodiments of the present invention, the compensation member is configured as a compensation column 60, which is disposed near the distal end of the tissue closure clip 100 and connected to the first pressing arm 10 or the clamp arm 30. In this embodiment, the compensation column 60 can be configured as a rigid member or an elastic member. The compensation column 60 and the first pressing arm 10 or the clamp arm 30 can be connected by welding or integral molding, and the connection method is not specifically limited in this embodiment.

[0082] Furthermore, in some embodiments of the present invention, the compensation column 60 is configured as a rigid part, one end of the compensation column 60 is connected to the clamp arm 30, and the other end extends toward the first pressure arm 10, and can abut against the first pressure arm 10 under the clamping condition. Specifically, one end of the compensation column 60 is connected to the clamp arm 30, connected to a portion close to the distal end of the clamp arm 30 and located on the side of the clamp arm 30 facing the first pressure arm 10, and the specific position of this end of the compensation column 60 along the axial direction of the tissue closure clamp 100 can be set according to actual clamping requirements; the other end of the compensation column 60 can extend toward the first pressure arm 10 in a direction perpendicular to the clamp arm 30. Fig.16 As shown, in the initial working state of the tissue closing clip 100, the end of the compensation column 60 has a certain gap or slight contact with the first pressing arm 10, as shown in FIG. Fig.17 As shown, when the tissue closing clamp 100 is in a clamping state after clamping the tissue 70, due to the elastic deformation of the clamp arm 30 moving toward the first pressure arm 10, the compensation column 60 moves with the clamp arm 30 toward the first pressure arm 10 until its end abuts against the inner side of the first pressure arm 10, thereby applying pressure in the reverse direction toward the clamp arm 30 and the tissue 70.

[0083] In this embodiment, a rigid compensation column 60 is arranged between the first pressure arm 10 and the clamp arm 30 near the distal end, and the compensation column 60 is used to shorten the force arm of the clamp arm 30. By shortening the force arm, the torque when the proximal side of the clamp arm 30 clamps the tissue 70 is reduced, thereby compensating for the clamping force of the middle and proximal parts of the clamp arm 30 on the tissue 70, avoiding the problem of insufficient clamping force of the proximal side of the tissue closing clamp 100 on the tissue 70 and uneven force application of the tissue closing clamp 100 as a whole, and ensuring the uniformity of the clamping force of the clamp arm 30 when clamping the tissue 70.

[0084] Embodiment 8

[0085] like Fig.18 , 19 As shown, the difference between this embodiment and the second embodiment is that a loading mechanism and a guide end 102 are added, which will be described in detail below.

[0086] The clamp arm 30 is provided with a first loading mechanism, which is a first loading hole 104; the second pressing arm 20 is provided with a second loading mechanism, which is a second loading hole 105. The tissue closing clip 100 is loaded on the conveying device through the first loading hole 104 and the second loading hole 105. The first loading hole 104 is arranged slightly close to the proximal end of the clamp arm 30, and the second loading hole 105 is arranged slightly close to the proximal end of the second pressing arm 20. In this way, when the conveying device closes or opens the closing clip, the clamp arm 30 and the second pressing arm 20 can be basically parallel to each other during the closing or opening process, that is, the clamp arm 30 and the second pressing arm 20 are basically parallel to each other during the process of approaching or moving away from each other. This is more conducive to the clamp arm 30 and the second pressing arm 20 clamping the target tissue 70, and the clamping force is more uniform, thereby improving the sealing performance of the tissue closing clip 100.

[0087] In addition, in order to facilitate implantation of the tissue closure clip 100 into the human body, the tissue closure clip 100 is designed as follows, that is, the distal end of the clamp arm 30 and the distal end of the first pressing arm 10 are combined into a guide end 102, and the thickness of the guide end 102 gradually decreases from near to far, and the specific setting method is to design the outer side surface of the guide end 102 into an inwardly concave arc surface, and the arc surface forms a convex arc surface transition with the outer side surface of the first pressing arm 10. The thickness of the guide end 102 refers to the length along the opening / closing direction of the tissue closure clip 100, that is, the greater the length in the opening / closing direction of the tissue closure clip 100, the greater the thickness, and vice versa.

[0088] In the initial state, the guide end 102 and the distal end of the second pressing arm 20 together form a conical structure, that is, along the direction from near to far, the common thickness of the guide end 102 and the distal end of the second pressing arm 20 gradually decreases, which is conducive to delivering the tissue closure clip 100 into the human body, thereby improving the convenience of closing clip input.

[0089] The loading mechanism in the present invention is used to cooperate with the conveying device to convey the tissue closure clip 100 and control the opening and closing of the tissue closure clip 100. Compared with the prior art, the present invention can bring the following clinical benefits: the closing ability of the tissue closure clip 100 is significantly improved, the closing uniformity is better, and the sealing performance is improved; the loading mechanism can also reduce the conveying volume, increase the passability, and improve the surgical effect and surgical efficiency; the loading mechanism improves the safety and reliability of loading.

[0090] Embodiment 9

[0091] like Fig. 20 , 21 As shown, the difference between this embodiment and the eighth embodiment lies in the structure of the loading mechanism, which is described in detail below.

[0092] The first loading mechanism is a loading column 106, one end of which is disposed on the clamp arm 30, and the other end of which passes through a through hole 108 on the first pressing arm 10 and extends to the outside of the first pressing arm 10, with a clearance fit between the loading column 106 and the through hole 108, and a first loading hole 109 is disposed at the other end of the loading column 106, and the first loading hole 109 is located at the outside of the first pressing arm 10. The second loading mechanism is a loading block 107, which is disposed at the outside of the second pressing arm 20, and a second loading hole 110 is disposed on the loading block 107.

[0093] In this embodiment, the tissue closure clip 100 is loaded onto the delivery device through the first loading hole 109 on the loading column 106 and the second loading hole 110 on the loading block 107 .

[0094] In this embodiment, the loading column 106 is arranged at a position slightly close to the proximal end of the clamp arm 30, and the loading block 107 is arranged at a position slightly close to the proximal end of the second pressing arm 20. In this way, when the conveying device closes or opens the tissue closing clamp 100, the clamp arm 30 and the second pressing arm 20 can be kept substantially parallel to each other during the closing or opening process, that is, the clamp arm 30 and the second pressing arm 20 are kept substantially parallel to each other during the process of approaching or moving away from each other. This is more conducive to the clamp arm 30 and the second pressing arm 20 clamping the target tissue 70, and the clamping force is more uniform, thereby improving the sealing performance of the closing clamp.

[0095] In this embodiment, there is a clearance fit between the loading column 106 and the through hole 108, the purpose of which is that when the clamp arm 30 and the second clamp arm 20 clamp the tissue 70, the distance between the first clamp arm 10 and the clamp arm 30 will become smaller (that is, the cavity 103 formed between the first clamp arm 10 and the clamp arm 30 will become smaller) compared to the initial state, that is, during the opening process of the tissue closing clamp 100, relative movement will occur between the first clamp arm 10 and the clamp arm 30. In order not to hinder the relative movement between the two, a clearance fit is set between the loading column 106 and the through hole 108. In this way, when the first clamp arm 10 and the clamp arm 30 move relative to each other, the loading column 106 will move along the through hole 108 toward the outside or inside of the first clamp arm 10, thereby achieving the purpose of not hindering the relative movement between the first clamp arm 10 and the clamp arm 30.

[0096] Embodiment 10

[0097] like Fig. 22 , 23 As shown, the difference between this embodiment and the eighth embodiment lies in the structure of the loading mechanism, which is described in detail below.

[0098] The first loading mechanism is a loading arm 80, one end of which is connected to the clamping arm 30, and the other end of which is connected to the clamping arm 30 after bypassing the first pressing arm 10. At this time, the first pressing arm 10 is inserted into the space surrounded by the loading arm 80 and the clamping arm 30, and a gap is left between the loading arm 80 and the first pressing arm 10. The second loading mechanism is a loading block 107, which is arranged on the outer side of the second pressing arm 20, and a loading hole 114 is provided on the loading block 107.

[0099] Since there is a gap between the loading arm 80 and the outer side of the first pressing arm 10 , the tissue closing clip 100 can be loaded onto the conveying device through the loading arm 80 portion outside the first pressing arm 10 and the loading hole 114 on the loading block 107 .

[0100] In this embodiment, both ends of the loading arm 80 are connected to a position slightly close to the proximal end of the clamp arm 30, and the loading block 107 is arranged at a position slightly close to the proximal end of the second pressing arm 20. In this way, when the conveying device closes or opens the tissue closing clamp 100, the clamp arm 30 and the second pressing arm 20 can be kept substantially parallel to each other during the closing or opening process, that is, the clamp arm 30 and the second pressing arm 20 can be kept substantially parallel to each other during the process of approaching or moving away from each other. This is more conducive to the clamp arm 30 and the second pressing arm 20 clamping the target tissue 70, and the clamping force is more uniform, thereby improving the sealing performance of the closing clamp.

[0101] In this embodiment, a gap is left between the loading arm 80 and the first pressing arm 10. The purpose is that when the clamp arm 30 and the second pressing arm 20 clamp the tissue 70, the distance between the first pressing arm 10 and the clamp arm 30 will become smaller (that is, the cavity 103 formed between the first pressing arm 10 and the clamp arm 30 will become smaller) compared to the initial state. In other words, during the opening process of the tissue closing clamp 100, relative movement will occur between the first pressing arm 10 and the clamp arm 30. In order not to hinder the relative movement between the two, a gap is designed to be left between the loading arm 80 and the first pressing arm 10. In this way, when the first pressing arm 10 and the clamp arm 30 move relative to each other, the first pressing arm 10 will move closer to or away from the clamp arm 30 in the space surrounded by the loading arm 80 and the clamp arm 30, but in this process, the first pressing arm 10 will not come into contact with the loading arm 80. In other words, the loading arm 80 will not hinder the relative movement between the first pressing arm 10 and the clamp arm 30.

[0102] In this embodiment, the loading arm 80 includes two loading straight arms 113 and one loading curved arm 112, one end of the two loading straight arms 113 are connected to the clamping arm 30, the other ends of the two loading straight arms 113 extend toward the first pressing arm 10, the two loading straight arms 113 are respectively located on opposite sides of the first pressing arm 10, the loading curved arm 112 is located outside the first pressing arm 10, the two ends of the loading curved arm 112 are respectively connected to the other ends of the two loading straight arms 113, and there is a gap between the loading curved arm 112 and the two loading straight arms 113 and the first pressing arm 10. It can be seen that the loading arm 80 is U-shaped as a whole.

[0103] The tissue closure clip 100 is loaded onto the delivery device via the loading crank 112 and the loading hole 114 .

[0104] In order to further reduce the volume of the tissue closing clip 100, both ends of the loading arm 80 are connected to the side of the clamp arm 30 facing the first pressing arm 10, and grooves 111 are provided on opposite sides of the first pressing arm 10 for the loading arm 80 to pass through, specifically, grooves 111 are provided on opposite sides in the width direction of the first pressing arm 10. A gap is left between the loading arm 80 and the groove 111, so that the loading arm 80 does not hinder the relative movement between the first pressing arm 10 and the clamp arm 30.

[0105] For each groove 111 , a portion of the loading straight arm 113 may be located in the groove 111 , a portion of the loading curved arm 112 may be located in the groove 111 , or the connection between the loading straight arm 113 and the loading curved arm 112 may be located in the groove 111 .

[0106] Embodiment 11

[0107] like Fig.24 , 25As shown, the difference between this embodiment and the tenth embodiment lies in the different positions at which the loading arm 80 is specifically connected to the clamping arm 30, that is, the two ends of the loading arm 80 are not connected to the side of the clamping arm 30 facing the first pressing arm 10, but are respectively connected to two opposite side surfaces in the width direction of the clamping arm 30, and the gap between the two loading straight arms 113 is larger than the width of the first pressing arm 10. In this way, there is no need to set a groove 111 on the first pressing arm 10 for the loading arm 80 to pass through.

[0108] Embodiment 12

[0109] like Fig.26 , 27 As shown, the difference between this embodiment and the eleventh embodiment is that the distal ends of the first pressing arm 10 and the clamping arm 30 are combined into one to form a conical structure, that is, along the direction from near to far, the thickness of the above-mentioned conical structure gradually decreases, that is, the distal ends of the first pressing arm 10 and the clamping arm 30 are not set as the guide end 102 described in the eleventh embodiment after being combined into one.

[0110] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tissue closure clip, characterized in that: The tissue closing clamp includes a first pressing arm, a second pressing arm and a clamp arm, wherein the proximal end of the first pressing arm is connected to the proximal end of the second pressing arm, the clamp arm is arranged between the first pressing arm and the second pressing arm, the distal end of the clamp arm is connected to the distal end of the first pressing arm, the clamp arm extends along the length direction of the second pressing arm, and the clamp arm is in elastic contact with the second pressing arm under the initial working condition.

2. The tissue closure clip according to claim 1, characterized in that: The clamping arm and the second pressing arm are provided with tissue clamping surfaces, and the tissue clamping surfaces are configured as a plane, a convex surface or a wavy surface.

3. The tissue closure clip according to claim 1, characterized in that: The tissue closing clip further includes a U-shaped elastic member, and the U-shaped elastic member is respectively connected to the proximal end of the first pressing arm and the proximal end of the second pressing arm.

4. The tissue closure clip according to claim 1, characterized in that: The tissue closure clip further includes a compensating member disposed between the first pressing arm and the clamp arm.

5. The tissue closure clip according to claim 4, characterized in that: The compensation member is configured as an elastic compensation sheet, which is disposed close to the proximal end of the tissue closing clip and is connected to at least one of the first pressing arm and the clamp arm.

6. The tissue closure clip according to claim 5, characterized in that: One end of the elastic compensation sheet is connected to the first pressing arm, and the other end of the elastic compensation sheet extends obliquely toward the proximal end and is connected to the clamping arm, or One end of the elastic compensation sheet is connected to the first pressure arm, the other end of the elastic compensation sheet extends obliquely toward the proximal end, and the elastic compensation sheet partly abuts against the clamp arm, or One end of the elastic compensation sheet is connected to the clamping arm, the other end of the elastic compensation sheet extends obliquely toward the distal end, and a portion of the elastic compensation sheet is in contact with the first pressure arm.

7. The tissue closure clip according to claim 4, characterized in that: The compensation component is configured as a compensation column, and the compensation column is configured as a rigid member or an elastic member. The compensation column is disposed close to the distal end of the tissue closing clip and is connected to the first pressing arm or the clamp arm.

8. The tissue closure clip according to any one of claims 1 to 7, characterized in that: The clamping arm is provided with a first loading mechanism, and the second pressing arm is provided with a second loading mechanism.

9. The tissue closure clip according to claim 8, characterized in that: The first loading mechanism is a first loading hole, the second loading mechanism is a second loading hole, or The first loading mechanism is a loading column, one end of which is arranged on the clamp arm, the other end of which passes through the through hole on the first pressing arm and extends to the outside of the first pressing arm, and the other end of which is provided with a first loading hole, and the second loading mechanism is a loading block, which is arranged on the outside of the second pressing arm, and the loading block is provided with a second loading hole, or The first loading mechanism is a loading arm, one end of which is connected to the clamping arm, and the other end of which is connected to the clamping arm after bypassing the first pressing arm, with a gap left between the loading arm and the first pressing arm. The second loading mechanism is a loading block, which is arranged on the outer side of the second pressing arm and has a loading hole.

10. The tissue closure clip according to claim 9, characterized in that: The distal end of the clamp arm and the distal end of the first pressing arm are combined into one to form a guide end, and the thickness of the guide end gradually decreases along the direction from near to far.

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