Tissue clip and hemostatic device

Abstract

The present invention discloses a tissue clip and a hemostatic device, belonging to the technical field of medical devices. The tissue clip provided by the present invention comprises an upper arm of a tissue clip and a lower arm of a tissue clip, the first connecting end of the upper arm of the tissue clip and the second connecting end of the lower arm of the tissue clip are rotatably connected, and the first closed end of the upper arm of the tissue clip and the second closed end of the lower arm of the tissue clip are configured to have an open state and a closed state. The tissue clip is provided with a one-way rotation limiting mechanism at the rotation connection between the upper arm of the tissue clip and the lower arm of the tissue clip, so that the first closed end and the second closed end can be limited to a closed state, which greatly improves the tightness of the tissue clip after closing, and avoids the occurrence of loose closure and rebound opening of the tissue clip after closing. The hemostatic device provided in this embodiment can release the tissue clip and is easy to use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a tissue clip and a hemostatic device. Background Art

[0002] Laparoscopic technology, as a minimally invasive surgical technology, has achieved revolutionary success in more and more traditional surgical fields, and has become the main theme of global surgical development. In current minimally invasive surgical operations, bleeding is inevitable in intracavitary tissues or blood vessels during intracavitary operations, and necessary hemostasis should be performed in a timely manner. In the prior art, suture ligation is generally used for hemostasis, but this hemostasis method has the disadvantages of long operation time, small operating space, and the need for larger incision assistance. Therefore, the tissue clip carried by the clip applier has been widely used in current laparoscopic surgery as an effective hemostatic closure device.

[0003] However, the existing tissue clips are prone to problems such as insufficient fastening, loose closure, and rebound after closure during use. Therefore, it is urgent to propose a tissue clip that can solve the above problems. Summary of the invention

[0004] An object of the present invention is to provide a tissue clip which has sufficient tightness, high stability after closure and is not prone to rebound.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A tissue clip, comprising:

[0007] A tissue clip body, the tissue clip body comprising an upper tissue clip arm and a lower tissue clip arm, the upper tissue clip arm comprising a first connecting end and a first closed end, the lower tissue clip arm comprising a second connecting end and a second closed end, the first connecting end and the second connecting end are rotatably connected, and the first closed end and the second closed end are configured to have an open state and a closed state;

[0008] A one-way rotation limiting mechanism is provided at the rotation connection between the tissue clip upper arm and the tissue clip lower arm to limit the first closed end and the second closed end to the closed state.

[0009] Preferably, the one-way rotation limiting mechanism comprises a first inverted rack and an inverted tooth groove, one of the first inverted rack and the inverted tooth groove is arranged on the upper arm of the tissue clip, and the other is arranged on the lower arm of the tissue clip, and the first inverted rack and the inverted tooth groove are meshed.

[0010] Preferably, the tissue clip further comprises:

[0011] An anti-tilting mechanism is used to prevent the first inverted rack from tilting in a direction away from the inverted tooth groove.

[0012] Preferably, the anti-tilting mechanism is a pressing strip, one end of which is connected to the tissue clip body, and the other end of which is pressed against the free end of the first inverted rack.

[0013] Preferably, the first inverted rack is a bidirectional inverted rack, and a first inverted tooth structure and a third inverted tooth structure are respectively arranged on two opposite sides of the first inverted rack, and the first inverted tooth structure is meshed with the second inverted tooth structure in the inverted tooth groove;

[0014] The anti-tilting mechanism is a second inverted tooth bar, and a fourth inverted tooth structure is arranged on the second inverted tooth bar, and the fourth inverted tooth structure is meshed with the third inverted tooth structure.

[0015] Preferably, the anti-tilting mechanism is a loop band, which is fixed to the tissue clip body and sleeved on the connecting portion of the first inverted rack and the inverted tooth groove, and the inner diameter of the loop band is larger than the size of the connecting portion.

[0016] Preferably, the one-way rotation limiting mechanism comprises a limiting groove and a limiting hook, the limiting hook comprises a connecting arm and an elastic arm, one end of the elastic arm is connected to the connecting arm at an acute angle, and the other end is provided with a limiting flange folded outward;

[0017] One of the limiting groove and the connecting arm is arranged on the upper arm of the tissue clip, and the other is arranged on the lower arm of the tissue clip. The elastic arm elastically presses against the inner wall surface of the limiting groove and can move along the limiting groove during the closing process of the tissue clip body. The limiting flange is configured to elastically press against the limiting groove when the first closed end and the second closed end are in an open state, and is configured to stop against the end surface of the limiting groove when the first closed end and the second closed end are in a closed state.

[0018] Preferably, the one-way rotation limit mechanism includes a limit hook and a limit slot, one of the limit hook and the limit slot is arranged on the first clamping surface of the upper arm of the tissue clip, and the other is arranged on the second clamping surface of the lower arm of the tissue clip, and the limit hook and the limit slot are configured to be engaged when the first closed end and the second closed end are in a closed state.

[0019] Preferably, a reinforcement body is provided in both the upper arm of the tissue clip and the lower arm of the tissue clip.

[0020] Preferably, the reinforcement body is a filamentary structure made of titanium.

[0021] Preferably, one of the first closed end and the second closed end is provided with a locking hook, and the other is provided with a locking groove, and the locking hook can be snapped into the locking groove.

[0022] Preferably, a holding mechanism is disposed on both the first closed end and the second closed end, and the holding mechanism is used to cooperate with and connect with the jaws of the clip applier.

[0023] Preferably, an elastic pin structure is protruded from the end of the holding mechanism along its axial direction, and the elastic pin structure is used to be clamped in a positioning groove located in the jaws.

[0024] Preferably, a first clamping tooth structure is provided on the first clamping surface of the upper arm of the tissue clamp, and the first clamping tooth structure comprises a first clamping tooth protrusion and a first clamping tooth groove;

[0025] A second clamping tooth structure is provided on the second clamping surface of the lower arm of the tissue clamp, and the second clamping tooth structure includes a second clamping tooth protrusion and a second clamping tooth groove;

[0026] When the first closed end and the second closed end are configured to be in a closed state, the second clamping tooth protrusion is clamped in the first clamping tooth groove, and the first clamping tooth protrusion is clamped in the second clamping tooth groove.

[0027] Another object of the present invention is to provide a hemostatic device which is easy to use and has high stability in the process of releasing the tissue clip by the clip applier.

[0028] To achieve this object, the present invention adopts the following technical solutions:

[0029] A hemostatic device comprises a clip applier and the above-mentioned tissue clip, wherein the clip applier is used for releasing the tissue clip.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a tissue clip, which includes an upper arm of the tissue clip and a lower arm of the tissue clip, wherein a first connection end of the upper arm of the tissue clip and a second connection end of the lower arm of the tissue clip are rotatably connected, and a first closed end of the upper arm of the tissue clip and a second closed end of the lower arm of the tissue clip are configured to have an open state and a closed state. The tissue clip is provided with a one-way rotation limiting mechanism at the rotation connection between the upper arm of the tissue clip and the lower arm of the tissue clip, so that the first closed end and the second closed end can be limited to a closed state, thereby greatly improving the tightness of the tissue clip after closing, and avoiding the occurrence of the phenomenon that the closure is not firm and the tissue clip rebounds and opens after closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an axonometric view of the tissue clip provided in the first embodiment of the present invention;

[0033] Figure 2 This is a front view of the tissue clip provided by the first embodiment of the present invention;

[0034] Figure 3 yes Figure 2 Sectional view in the AA direction;

[0035] Figure 4 is a schematic structural diagram of the clip applier provided by the present invention;

[0036] Figure 5 is a first state diagram of the B portion of the clip applier provided by the present invention;

[0037] Figure 6 is a second state diagram of the B portion of the clip applier provided by the present invention;

[0038] Figure 7 is a third state diagram of the B portion of the clip applier provided by the present invention;

[0039] Figure 8 is a schematic diagram of the working state of the one-way rotation limiting mechanism provided in the second embodiment of the present invention;

[0040] Fig. 9 The structure diagram of the tissue clip provided by the fourth embodiment of the present invention is provided with a pressure strip. Figure 1 ;

[0041] Fig.10 The structure diagram of the tissue clip provided by the fourth embodiment of the present invention is provided with a pressure strip. Figure 2 ;

[0042] Fig.11 The structure diagram of the second inverted rack provided on the tissue clip provided in the fourth embodiment of the present invention is Figure 1 ;

[0043] Fig.12 The structure diagram of the second inverted rack provided on the tissue clip provided in the fourth embodiment of the present invention is Figure 2 .

[0044] In the figure:

[0045] 1. tissue clamp upper arm; 11. first clamping surface; 12. locking hook; 13. first clamping tooth protrusion; 14. first clamping tooth groove;

[0046] 2. lower arm of tissue clamp; 21. second clamping surface; 22. locking groove; 23. second clamping tooth protrusion; 24. second clamping tooth groove;

[0047] 3. One-way rotation limiting mechanism; 31. First inverted rack; 32. Inverted tooth groove; 33. Limiting groove; 34. Limiting hook; 341. Connecting arm; 342. Elastic arm; 343. Limiting flange;

[0048] 4. Supporting institutions;

[0049] 5. Elastic needle structure; 51. Elastic body; 52. Elastic block;

[0050] 6. Pressure bar; 7. Second inverted rack;

[0051] 10. Tissue clip; 20. Tissue to be hemostatic;

[0052] 100. Clip applier; 101. Positioning slot. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Embodiment 1

[0057] This embodiment provides a tissue clip 10, which can be used in minimally invasive surgery to perform a hemostasis operation on a tissue to be hemostatic 20, which can be a blood vessel. In a specific use process, the tissue clip 10 is released by a clip applier 100, and the tissue clip 10 is clamped on the tissue to be hemostatic 20, thereby achieving hemostasis.

[0058] like Figures 1 to 3As shown, the tissue clip 10 includes a tissue clip body and a one-way rotation limit mechanism 3. The tissue clip body can be made of biomedical polymer materials, such as ABS resin, polyetheretherketone, reinforced polytetrafluoroethylene, ultra-high molecular weight polyethylene UHMWPE, polypropylene, polyoxymethylene or nylon. Specifically, the tissue clip body includes a tissue clip upper arm 1 and a tissue clip lower arm 2. The tissue clip upper arm 1 includes a first connecting end and a first closed end, and the tissue clip lower arm 2 includes a second connecting end and a second closed end. The first connecting end of the tissue clip upper arm 1 and the second connecting end of the tissue clip lower arm 2 are rotationally connected. It should be noted that the rotation connection here can be achieved by setting a shaft hole on the first connecting end and the second connecting end, and then using the shaft to pass through the two shaft holes; or the first connecting end and the second connecting end can be integrally formed, and the elasticity of the material itself can be used to achieve relative rotation.

[0059] The first closed end of the tissue clip upper arm 1 and the second closed end of the tissue clip lower arm 2 have an open state and a closed state. In order to achieve the closure of the first closed end and the second closed end, a locking hook 12 is provided at the first closed end of the tissue clip upper arm 1, and a locking groove 22 is provided at the second closed end of the tissue clip lower arm 2. The locking groove 22 can be a groove-shaped structure directly opened on the second closed end, or it can be two locking plates protruding on the second closed end, and the locking groove 22 is formed by using the space between the two locking plates. When the tissue clip upper arm 1 and the tissue clip lower arm 2 gradually approach to a certain extent under the external force applied by the clamp applier 100, the locking hook 12 can be clamped in the locking groove 22, thereby achieving the closure of the first closed end and the second closed end, and then clamping the blood vessel between the tissue clip upper arm 1 and the tissue clip lower arm 2.

[0060] Of course, in other embodiments, the positions of the lock hook 12 and the lock slot 22 can be interchanged, that is, the lock hook 12 is set on the second closed end, and the lock slot 22 is set on the first closed end. In addition to the combination of the lock hook 12 and the lock slot 22, of course, two lock hooks can be connected to each other or other structures can be used to achieve the closure of the first closed end and the second closed end, which will not be repeated here.

[0061] The one-way rotation limiting mechanism 3 is arranged at the rotation connection between the tissue clip upper arm 1 and the tissue clip lower arm 2 to limit the first closed end and the second closed end to a closed state after the tissue clip body is closed. Figure 1 As shown, in this embodiment, the one-way rotation limiting mechanism 3 includes a first inverted rack 31 and an inverted tooth groove 32. The first inverted rack 31 is convexly arranged at the first connection end of the tissue clamp upper arm 1, and the inverted tooth groove 32 is provided at the second connection end of the tissue clamp lower arm 2. The first inverted rack 31 and the inverted tooth groove 32 are both located on the outer wall surface of the tissue clamp body that is arranged opposite to the clamping surface. A first inverted tooth structure is convexly arranged on the first inverted rack 31, and a second inverted tooth structure is convexly arranged in the inverted tooth groove 32, and the first inverted tooth structure and the second inverted tooth structure are meshed.

[0062] Since the inverted teeth on the first inverted tooth structure and the second inverted tooth structure each include two inclined surfaces with the same inclination direction but different inclination angles, during the closing process of the tissue clip body, the first inverted rack 31 can move along one of the inclined surfaces relative to the inverted tooth groove 32, thereby not affecting the gradual approach and closing of the tissue clip upper arm 1 and the tissue clip lower arm 2; and after the first closed end and the second closed end are closed, if there is a rebound tendency due to excessive elasticity of the material itself or insufficient locking force of the locking hook 12 and the locking groove 22, due to the existence of the other inclined surface, the first inverted tooth structure on the first inverted rack 31 can stop on the second inverted tooth structure in the inverted tooth groove 32, thereby preventing the rebound tendency and maintaining the first closed end and the second closed end in a closed state.

[0063] Of course, in other embodiments, the positions of the first inverted rack 31 and the inverted tooth groove 32 can also be interchanged, that is, the first inverted rack 31 is set on the lower arm 2 of the tissue clip, and the inverted tooth groove 32 is set on the upper arm 1 of the tissue clip, as long as the inclination direction of the inverted teeth on the first inverted tooth structure and the second inverted tooth structure is changed. Further, in order to improve the structural compactness of the entire tissue clip 10, a receiving groove can be set at the connection between the upper arm 1 of the tissue clip and the lower arm 2 of the tissue clip, and the receiving groove and the inverted tooth groove 32 are connected, and the first inverted rack 31 is placed in the receiving groove and the inverted tooth groove 32, so that the outer wall surface of the first inverted rack 31 is coplanar with the outer wall surface of the tissue clip body.

[0064] In order to further prevent the tissue clip 10 from rebounding after closing, a reinforcing body (not shown in the figure) is provided in the upper arm 1 of the tissue clip and the lower arm 2 of the tissue clip. Optionally, the reinforcing body is a filamentary structure made of a metal material, preferably titanium, so that the tissue clip body is not easy to rebound after closing. In addition to titanium, memory alloys that are not easy to rebound are also suitable as materials for making the reinforcing body. The reinforcing body can be cylindrical or flat. The reinforcing body can be placed inside the upper arm 1 of the tissue clip and the lower arm 2 of the tissue clip, or it can be embedded on the surface. In this embodiment, a receiving groove is provided on the first clamping surface 11 of the upper arm 1 of the tissue clip, and a receiving groove is also provided on the second clamping surface 21 of the lower arm 2 of the tissue clip, and the reinforcing body is placed in the receiving groove.

[0065] Optionally, in order to improve the clamping force of the tissue clip upper arm 1 and the tissue clip lower arm 2 on the tissue to be hemostatic 20 after closing, and to prevent the tissue clip 10 from squeezing the tissue to be hemostatic 20 outward when closing, as shown in FIG. Figure 1As shown, a clamping tooth structure is provided on the first clamping surface 11 of the tissue clamp upper arm 1 and the second clamping surface 21 of the tissue clamp lower arm 2, and the clamping tooth structure can increase the slipping force between the tissue to be hemostatic 20 and the tissue clamp 10. Optionally, the clamping tooth structure includes a first clamping tooth structure and a second clamping tooth structure, the first clamping tooth structure includes a first clamping tooth protrusion 13 and a first clamping tooth groove 14 arranged side by side along the length direction of the tissue clamp upper arm 1, and the second clamping tooth structure includes a second clamping tooth protrusion 23 and a second clamping tooth groove 24 arranged side by side along the length direction of the tissue clamp lower arm 2, the second clamping tooth protrusion 23 and the first clamping tooth groove 14 are matched in shape, and the first clamping tooth protrusion 13 and the second clamping tooth groove 24 are matched in shape. In order to avoid cutting damage to the tissue to be hemostatic 20, the first clamping tooth protrusion 13 and the second clamping tooth protrusion 23 are both hemispherical or semi-cylindrical structures with smooth outer wall surfaces.

[0066] When the first closed end and the second closed end are in a closed state, the second clamping tooth protrusion 23 is clamped in the first clamping tooth groove 14, and the first clamping tooth protrusion 13 is clamped in the second clamping tooth groove 24. Further, the first clamping tooth structure includes a plurality of groups of first clamping tooth protrusions 13 and first clamping tooth grooves 14 arranged side by side, and the second clamping tooth structure includes a plurality of groups of second clamping tooth protrusions 23 and second clamping tooth grooves 24 arranged side by side, so as to further improve the slipping force between the tissue 20 to be hemostatically controlled and the tissue clip 10.

[0067] Furthermore, if Figures 1 to 3 As shown, a holding mechanism 4 is provided on both the first closed end and the second closed end, and the holding mechanism 4 can be assembled with the jaws of the clip applier 100 to limit the position of the tissue clip 10 in the jaws. Optionally, the holding mechanism 4 can be a columnar structure or two teardrop-shaped plate structures arranged at intervals. When the tissue clip 10 is placed in the jaws of the clip applier 100, the two ends of the holding mechanism 4 abut against the two side walls arranged oppositely in the jaws, and can move toward the end of the jaws when the clip applier 100 applies force to the tissue clip 10, so as to finally release the tissue clip 10.

[0068] Furthermore, in order to improve the positioning accuracy of the tissue clip 10 in the jaws, a spring pin structure 5 is protruded along the axial direction of the end of the holding mechanism 4, and the spring pin structure 5 can be extended and retracted along the axial direction of the holding mechanism 4. Specifically, Figure 3As shown, the elastic pin structure 5 includes an elastic block 52 and an elastic body 51, one end of the elastic body 51 is connected to the end of the holding mechanism 4, and the other end is connected to the elastic block 52. Optionally, the elastic body 51 is a spring, and the elastic block 52 is a cylindrical structure made of metal material. The positioning groove 101 on the clip applier 100 used in conjunction with the elastic pin structure 5 is a U-shaped groove. In order to improve the structural compactness of the holding mechanism 4 and the elastic pin structure 5, a mounting hole can be set in the axial direction of the holding mechanism 4, and a receiving hole can be set in the elastic block 52. A flange is set at one end of the elastic block 52 close to the elastic body 51, and the flange is placed in the mounting hole and abuts against the inner end surface of the mounting hole. One end of the elastic body 51 is placed in the mounting hole, and the other end is placed in the receiving hole.

[0069] like Figures 4 to 7 As shown, when the tissue clip 10 is in the temporary storage position in the jaws of the clip applier 100, the elastic body 51 is compressed, the spring block 52 shrinks on the inner side of the jaws, and abuts against the inner wall surface of the jaws; when the tissue clip 10 is pushed from the temporary storage position to the working position in the clip applier 100, the tissue clip 10 moves from the inner side to the outer side of the jaws, and when the spring pin structure 5 moves to the positioning groove 101 set on the jaws, the spring block 52 can be extended under the action of the elastic body 51 and placed in the positioning groove 101 of the clip applier 100, thereby improving the positioning accuracy of the tissue clip 10 in the jaws when the tissue clip 10 is released.

[0070] This embodiment also provides a hemostatic device, which includes a clip applier 100 and the tissue clip 10 described above. Figures 4 to 7 As shown, the clip applier 100 is used to release the above-mentioned tissue clip 10. The jaws of the clip applier 100 are provided with a positioning groove 101, which is used to cooperate with the elastic pin structure 5 on the tissue clip 10.

[0071] like Figures 4 to 7 As shown, the process of releasing the tissue clip 10 by the clip applier 100 is as follows:

[0072] First, the tissue clip 10 is placed deep in the jaws; then, the tissue clip 10 is pushed to the jaws by using the clamp pusher of the clip applier 100, at which time, the spring pin structure 5 is inserted into the positioning groove 101 at the jaws; finally, the outer sleeve of the clip applier 100 moves to close the tissue clip 10, thereby closing the tissue 20 to be hemostatic, and after the tissue clip 10 is closed, the outer sleeve moves in the opposite direction to release the closed tissue clip 10. The clip applier 100 is easy to use and has high positioning accuracy for the tissue clip 10.

[0073] Embodiment 2

[0074] On the basis of the first embodiment, this embodiment provides a tissue clip 10, which includes a tissue clip body and a one-way rotation limiting mechanism 3. The structure of the tissue clip body is the same as that of the tissue clip body in the first embodiment, and will not be described in detail here. The difference between this embodiment and the first embodiment is only that the structure of the one-way rotation limiting mechanism 3 is different.

[0075] In this embodiment, if Figure 8 As shown, the one-way rotation limiting mechanism 3 includes a limiting groove 33 and a limiting hook 34. The limiting hook 34 includes a connecting arm 341 and an elastic arm 342, one end of the elastic arm 342 is connected to the connecting arm 341 at an acute angle, and the other end is provided with a limiting flange 343 folded outward. The number of elastic arms 342 can be one or more. When the number of elastic arms 342 is more than one, the multiple elastic arms 342 are radially arranged on the connecting arm 341 so that the limiting hook 34 is "umbrella-shaped" as a whole. The limiting groove 33 can be a rectangular groove or a trapezoidal groove, preferably a trapezoidal groove. In this embodiment, the limiting hook 34 is arranged on the upper arm 1 of the tissue clip, one end of the connecting arm 341 of the limiting hook 34 is fixedly connected to the upper arm 1 of the tissue clip, and the limiting groove 33 is arranged on the lower arm 2 of the tissue clip.

[0076] When the first closed end of the tissue clip upper arm 1 and the second closed end of the tissue clip lower arm 2 are in the open state, the elastic arm 342 and the limiting flange 343 of the limiting hook 34 are both located in the limiting groove 33 and are in a contracted state relative to the connecting arm 341, and the elastic arm 342 and the limiting flange 343 are both elastically pressed against the inner wall surface of the limiting groove 33. During the closing process of the tissue clip 10, the limiting hook 34 moves outward along the limiting groove 33 and gradually expands, the elastic arm 342 always keeps at least part of the structure in the limiting groove 33, and the limiting flange 343 gradually moves outward from the inside of the limiting groove 33. When the tissue clip 10 is closed, the limiting flange 343 moves to the outside of the limiting groove 33 and abuts against the end surface of the limiting groove 33.

[0077] Since the elastic arm 342 can be retracted relative to the connecting arm 341, the cooperation between the limiting groove 33 and the limiting hook 34 will not affect the gradual approach and closing of the tissue clip upper arm 1 and the tissue clip lower arm 2 of the tissue clip 10. After the first closed end and the second closed end are closed, if the tissue clip body has a tendency to rebound due to the excessive elasticity of its own material or the insufficient locking force of the locking hook 12 and the locking groove 22, the limiting flange 343 abuts against the end surface of the limiting groove 33 at this time, and the limiting hook 34 is in an expanded state and cannot make the limiting flange 343 enter the limiting groove 33 again, thus preventing the rebound tendency of the tissue clip body and keeping the tissue clip body in a closed state.

[0078] This embodiment also provides a hemostatic device, which includes a clip applier 100 and the above-mentioned tissue clip 10. The hemostatic device provided in this embodiment has the same structure as the hemostatic device in the first embodiment, and will not be described in detail here.

[0079] Embodiment 3

[0080] On the basis of the first and second embodiments, this embodiment provides a tissue clip 10, which includes a tissue clip body and a one-way rotation limiting mechanism 3. The structure of the tissue clip body is the same as that of the tissue clip body in the first and second embodiments, and will not be described in detail here. The difference between this embodiment and the first and second embodiments is only that the structure of the one-way rotation limiting mechanism 3 is different.

[0081] In this embodiment, the one-way rotation limit mechanism 3 includes a limit hook and a limit slot. The limit slot is arranged on the first clamping surface 11 of the upper arm 1 of the tissue clamp, preferably in the middle of the first clamping surface 11. The limit hook is arranged on the second clamping surface 21 of the lower arm 2 of the tissue clamp, preferably in the middle of the second clamping surface 21. When the first closed end and the second closed end are in a closed state, the limit hook can be clamped in the limit slot.

[0082] After the first closed end and the second closed end are closed, if the tissue clip body has a tendency to rebound due to excessive elasticity of its own material or insufficient locking force of the locking hook 12 and the locking groove 22, the clamping of the limit hook and the limit groove can prevent the rebound tendency of the tissue clip body and keep the tissue clip body in a closed state. It should be noted that the dual cooperation of the limit hook and the limit groove, and the locking hook 12 and the locking groove 22 can realize the two-point clamping of the tissue clip 10, thereby greatly improving the tightness of the tissue clip 10 after closing.

[0083] Of course, in other embodiments, the positions of the limiting hook and the limiting slot can also be interchanged, that is, the limiting hook is set in the middle of the first clamping surface 11 of the tissue clip upper arm 1, and the limiting slot is set in the middle of the second clamping surface 21 of the tissue clip lower arm 2.

[0084] This embodiment also provides a hemostatic device, which includes a clip applier 100 and the above-mentioned tissue clip 10. The hemostatic device provided in this embodiment has the same structure as the hemostatic devices in Embodiments 1 and 2, and will not be described in detail here.

[0085] Embodiment 4

[0086] On the basis of the first embodiment, the present embodiment provides a tissue clip 10, which includes a tissue clip body and a one-way rotation limiting mechanism 3. The one-way rotation limiting mechanism 3 has the same structure as the one-way rotation limiting mechanism 3 in the first embodiment, and will not be described in detail here. The difference between the present embodiment and the first embodiment is that the structure of the tissue clip body is different from that of the tissue clip body in the first embodiment, and an anti-tilting mechanism is further provided on the tissue clip body of the present embodiment, and the anti-tilting mechanism is used to limit the first inverted rack 31 to limit the first inverted rack 31 in the inverted tooth groove 32, so as to prevent the first inverted rack 31 from tilting toward a square away from the inverted tooth groove 32.

[0087] Alternatively, if Fig. 9 and Fig.10 As shown, the anti-tilting mechanism can be a pressing strip 6, which is a strip structure made of elastic material, such as rubber, one end of which is connected to the lower arm 2 of the tissue clamp, and the other end presses against the free end of the first inverted rack 31. When the tissue clamp body gradually closes under the action of external force, and the first inverted tooth structure on the first inverted rack 31 moves in the inverted tooth groove 32, the pressing strip 6 can give a pressing force to the first inverted rack 31, and the pressing force can prevent the first inverted rack 31 from tilting. It should be noted that the magnitude of the pressing force cannot affect the movement of the first inverted rack 31 in the inverted tooth groove 32.

[0088] Of course, in addition to the pressing strip 6, the anti-tilting mechanism can also be Fig.11 and Fig.12 The second inverted rack 7 is shown, one end of the second inverted rack 7 is connected to the lower arm 2 of the tissue clip, and the other end is provided with a fourth inverted tooth structure. At this time, the first inverted rack 31 is a bidirectional inverted rack, and a third inverted tooth structure is provided on the side of the first inverted rack 31 opposite to the first inverted tooth structure, and the third inverted tooth structure is meshed with the fourth inverted tooth structure. When the tissue clip body is gradually closed under the action of external force, when the first inverted tooth structure on the first inverted rack 31 moves in the inverted tooth groove 32, the third inverted tooth structure can move along the fourth inverted tooth structure. Since the first inverted rack 31 is limited between the second inverted rack 7 and the inverted tooth groove 32, the purpose of preventing the first inverted rack 31 from tilting can be achieved. In addition, the double inverted tooth structure can further improve the tightness of the tissue clip 10 after closing, so as to further avoid the occurrence of loose closure and the rebound and opening of the tissue clip 10 after closing.

[0089] Optionally, the tooth tips of the inverted tooth structures on the first inverted rack 31, the inverted tooth groove 32 and the second inverted rack 7 may be regular shapes (e.g., triangles, arcs, etc.) or irregular shapes, which are not specifically limited here. Preferably, the tooth tips of the inverted tooth structures on the first inverted rack 31, the inverted tooth groove 32 and the second inverted rack 7 may be regular shapes (e.g., triangles, arcs, etc.) or irregular shapes. Fig.12As shown, it is arranged at an obtuse angle to its movement direction to reduce the resistance encountered by the tissue clip body during normal closing, making it easier to close and less likely to reverse, thereby further improving the tightness of the tissue clip body after closing.

[0090] In addition, the pressing strip 6 as an anti-tilting mechanism can be integrally formed with the lower arm 2 of the tissue clip. Fig. 9 As shown, the outer protrusion is arranged on the lower arm 2 of the tissue clip, or as Fig.10 The non-convex structure is shown, that is, the outer wall surface of the pressing strip 6 is arranged coplanar with the lower arm 2 of the tissue clip, so as to improve the structural compactness of the entire tissue clip 10 and avoid damage to other tissues in the patient's body when the tissue clip 10 is placed. The second inverted rack 7 as an anti-tilting mechanism can also be integrally formed with the lower arm 2 of the tissue clip, which can be as shown in FIG. Fig.11 As shown, the lower arm 2 of the tissue clip is convex, and can also be arranged as Fig.12 The non-convex structure is shown, that is, the outer wall surface of the second inverted rack 7 is arranged coplanar with the lower arm 2 of the tissue clip to improve the structural compactness of the entire tissue clip 10 and avoid damage to other tissues in the patient's body when placing the tissue clip 10. Of course, in addition to being integrally formed, the pressing strip 6 or the second inverted rack 7 can be separately arranged with the lower arm 2 of the tissue clip and then connected by bonding or connecting parts to form an integral structure.

[0091] Of course, in addition to the pressing strip 6 and the second inverted rack 7, the anti-tilting mechanism can also be a loop band, which is fixed to the tissue clip body and sleeved on the connecting portion of the first inverted rack 31 and the inverted tooth groove 32. Optionally, the loop band is a plastic ring made of plastic, and the inner diameter of the plastic ring is slightly larger than the size of the connecting portion of the first inverted rack 31 and the inverted tooth groove 32, so as to restrict the first inverted rack 31 in the plastic ring without affecting the movement of the first inverted rack 31.

[0092] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A tissue clip, characterized in that: include: A tissue clip body, the tissue clip body comprising an upper tissue clip arm (1) and a lower tissue clip arm (2), the upper tissue clip arm (1) comprising a first connecting end and a first closed end, the lower tissue clip arm (2) comprising a second connecting end and a second closed end, the first connecting end and the second connecting end being rotatably connected, and the first closed end and the second closed end being configured to have an open state and a closed state; a one-way rotation limiting mechanism (3), the one-way rotation limiting mechanism (3) being arranged at the rotation connection between the tissue clamp upper arm (1) and the tissue clamp lower arm (2) so as to limit the first closed end and the second closed end to the closed state; The one-way rotation limiting mechanism (3) comprises a first inverted rack (31) and an inverted tooth groove (32), one of the first inverted rack (31) and the inverted tooth groove (32) being arranged on the upper arm (1) of the tissue clamp, and the other being arranged on the lower arm (2) of the tissue clamp, the first inverted rack (31) being provided with a first inverted tooth structure convexly, the inverted tooth groove (32) being provided with a second inverted tooth structure convexly, the first inverted tooth structure and the second inverted tooth structure being meshed, the inverted teeth on the first inverted tooth structure and the second inverted tooth structure each comprising two inclined surfaces with the same inclination direction but different inclination angles; wherein, during the closing process of the tissue clamp body, the first inverted rack (31) can move relative to the inverted tooth groove (32) along one of the inclined surfaces; after the first closed end and the second closed end are closed, under the action of the other inclined surface, the first inverted tooth structure can stop against the second inverted tooth structure, so that the first closed end and the second closed end are maintained in a closed state; An anti-tilting mechanism, the anti-tilting mechanism is used to prevent the first inverted rack (31) from tilting in a direction away from the inverted tooth groove (32).

2. The tissue clip according to claim 1, characterized in that: The anti-tilting mechanism is a pressing strip (6), one end of which is connected to the tissue clip body, and the other end of which is pressed against the free end of the first inverted rack (31).

3. The tissue clip according to claim 1, characterized in that: The first inverted rack (31) is a bidirectional inverted rack, and a first inverted tooth structure and a third inverted tooth structure are respectively arranged on two opposite side surfaces of the first inverted rack (31), and the first inverted tooth structure meshes with the second inverted tooth structure in the inverted tooth groove (32); The anti-tilting mechanism is a second inverted toothed rack (7), one end of the second inverted toothed rack (7) is connected to the tissue clip body, and the other end is provided with a fourth inverted toothed structure, the fourth inverted toothed structure meshing with the third inverted toothed structure.

4. The tissue clip according to claim 1, characterized in that: The anti-tilting mechanism is a loop band, which is fixed to the tissue clip body and sleeved on the connecting portion between the first inverted rack (31) and the inverted tooth groove (32), and the inner diameter of the loop band is larger than the size of the connecting portion.

5. The tissue clip according to claim 1, characterized in that: A reinforcement body is provided inside the upper arm (1) of the tissue clamp and inside the lower arm (2) of the tissue clamp.

6. The tissue clip according to claim 5, characterized in that: The reinforcement body is a filamentary structure made of titanium.

7. The tissue clip according to claim 1, characterized in that: One of the first closed end and the second closed end is provided with a locking hook (12), and the other is provided with a locking groove (22), and the locking hook (12) can be snapped into the locking groove (22).

8. The tissue clip according to claim 1, characterized in that: A holding mechanism (4) is provided on both the first closed end and the second closed end, and the holding mechanism (4) is used to cooperate with and connect with the jaws of the clip applier (100).

9. The tissue clip according to claim 8, characterized in that: An elastic pin structure (5) is protruded along the axial direction of the end of the holding mechanism (4), and the elastic pin structure (5) is used to be clamped in a positioning groove (101) located in the jaws.

10. The tissue clip according to claim 1, characterized in that: A first clamping tooth structure is provided on the first clamping surface (11) of the upper arm (1) of the tissue clamp, and the first clamping tooth structure comprises a first clamping tooth protrusion (13) and a first clamping tooth groove (14); A second clamping tooth structure is provided on the second clamping surface (21) of the lower arm (2) of the tissue clamp, and the second clamping tooth structure comprises a second clamping tooth protrusion (23) and a second clamping tooth groove (24); When the first closed end and the second closed end are configured to be in a closed state, the second clamping tooth protrusion (23) is clamped in the first clamping tooth groove (14), and the first clamping tooth protrusion (13) is clamped in the second clamping tooth groove (24).

11. A tissue clip, characterized in that: include: A tissue clip body, the tissue clip body comprising an upper tissue clip arm (1) and a lower tissue clip arm (2), the upper tissue clip arm (1) comprising a first connecting end and a first closed end, the lower tissue clip arm (2) comprising a second connecting end and a second closed end, the first connecting end and the second connecting end being rotatably connected, and the first closed end and the second closed end being configured to have an open state and a closed state; a one-way rotation limiting mechanism (3), the one-way rotation limiting mechanism (3) being arranged at the rotation connection between the tissue clamp upper arm (1) and the tissue clamp lower arm (2) so as to limit the first closed end and the second closed end to the closed state; The one-way rotation limiting mechanism (3) comprises a limiting groove (33) and a limiting hook (34); the limiting groove (33) is a trapezoidal groove; the limiting hook (34) comprises a connecting arm (341) and an elastic arm (342); one end of the elastic arm (342) is connected to the connecting arm (341) at an acute angle, and the other end is provided with a limiting flange (343) folded outwards; One of the limiting groove (33) and the connecting arm (341) is arranged on the tissue clip upper arm (1), and the other is arranged on the tissue clip lower arm (2); the elastic arm (342) elastically presses against the inner wall surface of the limiting groove (33) and is capable of moving along the limiting groove (33) during the closing process of the tissue clip body; the limiting flange (343) is configured to elastically press against the limiting groove (33) when the first closed end and the second closed end are in an open state, and is configured to stop against the end surface of the limiting groove (33) when the first closed end and the second closed end are in a closed state.

12. A hemostatic device, characterized in that: The invention comprises a clip applier (100) and the tissue clip according to any one of claims 1 to 11, wherein the clip applier (100) is used to release the tissue clip.

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