A fiber ring plugging and repairing device

Abstract

The present invention discloses a fiber ring plugging and repairing device, comprising: a plugging stent woven from memory metal wire, a coating woven on the plugging stent, and an operating component, wherein the plugging stent comprises an inner clamping leaf, a plugging portion, and an outer clamping leaf, wherein the fiber direction of the coating on the surface of the inner clamping leaf is consistent with the fiber direction of the innermost fiber ring, and the fiber direction of the coating on the surface of the outer clamping leaf is consistent with the fiber direction of the outermost fiber ring, and a connecting portion is provided on the outer clamping leaf for detachable connection with the operating component; the operating component is connected to the connecting portion during installation, and after the plugging and repairing device reaches a predetermined position and generates a predetermined deformation, the operating component is separated from the connecting portion; wherein, after the predetermined deformation is generated, the unfolding area of ​​the inner clamping leaf and the outer clamping leaf is larger than the rupture area of ​​the fiber ring. This solves the problem that the existing fiber ring repairing device has a poor plugging effect and is not conducive to the self-healing of the fiber ring.

Description

Technical Field

[0001] The invention belongs to the technical field of annular fiber repair, and in particular relates to an annular fiber plugging and repairing device. Background Art

[0002] The human intervertebral disc is composed of three parts: cartilage endplate, annulus fibrosus and nucleus pulposus. The annulus fibrosus is a multi-layered structure. The annulus fibrosus fibers are arranged almost in concentric circles. The peripheral fibers are more vertical, and the inclination increases toward the center. The nucleus pulposus is located in the center of the intervertebral disc, and the water content can account for 75-90% of the total nucleus pulposus.

[0003] Lumbar disc herniation is one of the more common diseases. It is mainly caused by the degenerative changes of various parts of the lumbar disc, especially the nucleus pulposus, to varying degrees. Under the action of force factors, the annulus fibrosus of the disc ruptures, forming an annulus fibrosus gap. The nucleus pulposus tissue protrudes from the rupture to the back or into the spinal canal, causing the adjacent spinal nerve roots to be stimulated or compressed, resulting in a series of clinical symptoms such as low back pain, numbness and pain in one or both lower limbs.

[0004] Currently, open surgery is mainly used to remove the protruding intervertebral disc tissue that compresses the nerves and the hyperplastic and thickened tissue that causes the narrowed bone structure (surgical decompression). The surgery is very traumatic and the patient takes a long time to recover.

[0005] With the advancement of medical technology and people's requirements for the speed of surgical recovery, more and more patients require minimally invasive surgery. Minimally invasive surgery has the advantages of small trauma, light pain and fast recovery, which can reduce the pain of patients to the greatest extent and improve the quality of life of patients. Nucleus pulposus removal is a minimally invasive surgery for patients with ineffective conservative treatment of lumbar disc herniation, with remarkable effect, especially suitable for patients with recurrent lumbar disc herniation. This treatment does not use screws or metal rods for fixation. While performing nucleus pulposus removal, it can also remove the hypertrophy of the yellow ligament and solve the problem of nerve root canal stenosis caused by facet joint hyperplasia, and the cost is relatively low, the hospital stay is short, the recovery is fast and the trauma is small. However, the working channel of minimally invasive surgery for nucleus pulposus removal is fixed, the working space is narrow, the whole operation process needs to be performed in vivo, and the annulus fibrosus is deep, the space is narrow, and the operation is difficult. In order to remove the nucleus pulposus that compresses the nerves, it is necessary to make a breach in the annulus fibrosus (if the protrusion has broken through the annulus fibrosus, it is necessary to make certain repairs to the breach). Due to the lack of effective means to deal with annulus fibrosus defects clinically, the breach is generally not repaired after the protrusion is removed. However, since the annulus fibrosus has a very weak self-repair ability, if the rupture is not repaired, there is a high secondary recurrence rate after surgery, which brings great pain to patients. Studies have confirmed that the risk of recurrence after simple discectomy is related to the size of the annulus fibrosus defect. The larger the annulus fibrosus defect, the higher the postoperative recurrence rate. In addition, the scar tissue of the annulus fibrosus after the first operation and the worse annulus fibrosus quality also pose great challenges to secondary treatment. Therefore, during the initial discectomy, the annulus fibrosus should be repaired to reduce the incidence of postoperative re-herniation and postoperative complications. At present, special instruments are also used to suture and block the annulus fibrosus, but the existing instruments have the problems of high cost, complex operation, uneven treatment of the rupture edge, poor blocking effect, unfavorable healing of the annulus fibrosus itself, and serious impact on the biomechanical characteristics of the intervertebral disc itself, resulting in a high incidence of complications.

[0006] Here are some examples of existing technologies:

[0007] 1. Repair device for annulus fibrosus of intervertebral disc (Publication No.: CN105796165A)

[0008] The repair device consists of: an anchoring piece inserted into the lower side of the lower vertebral end plate to fix the annulus fibrosus repair device of the intervertebral disc; a blocking piece, one end of which is connected to the anchoring piece, and the other end is used to insert into the intervertebral disc through the gap in the annulus fibrosus, so that the blocking piece surrounds the posterior and superior part of the nucleus pulposus to block the gap in the annulus fibrosus and prevent the nucleus pulposus from protruding again.

[0009] Operation method: After removing the protrusion, make a groove on the surface of the first vertebral endplate bone close to the first vertebra, and install the delivery device at the connection between the anchor and the plug. Then place the anchor in the appropriate position, and use a wooden hammer to gently hammer the delivery device handle so that the anchor is inserted into the lower side of the lower vertebral endplate. Finally, remove the delivery device from the repair device, insert the plugging part into the annulus fibrosus through the breach, and complete the plugging.

[0010] Insufficient equipment:

[0011] 1) It is necessary to make grooves on the vertebral body, which causes additional damage to the bone and easily leads to fractures. For patients with osteoporosis, there is a greater possibility of implant dislocation;

[0012] 2) The anchor is made of titanium metal, which has a sharp surface (otherwise it is difficult to fix the bone and the anchor), which can easily damage the bone; and the properties of bone and titanium metal are very different, which can easily cause problems such as stress shielding;

[0013] 3) The sealing part is made of medical polyester braided parts, part of which is outside the wound and part of which is inside the wound, blocking the chance of the wound healing again; in addition, fatigue and breakage are inevitable after long-term use;

[0014] 4) One side of the occluding part is connected to the anchor and fixed on the vertebral body, but the other side is not fixed. There is not much research on whether the mesh polymer can be tightly combined with the annulus fibrosus tear, and there is still a risk of re-herniation.

[0015] 2. A fiber ring plugging device and plugging method (Publication No.: CN114533230A)

[0016] The device composition and blocking method include: a first blocking part, a second blocking part, and a first guide rod. The first guide rod can penetrate the second blocking part and extend into the first blocking part, so that the first blocking part changes from the initial state to the state to be inserted, and the cross-sectional diameter of the first blocking part in the state to be inserted is smaller than the cross-sectional diameter in the initial state, so that it is easier to enter the fiber ring from the fiber ring opening. After the first guide rod is released, the first blocking part returns to the disc shape of the initial state and is close to the inner wall surface of the fiber ring; the second blocking part is also provided with a fixing part for fixing the first guide rod in the state to be inserted when the second blocking part is in the state to be inserted; the second guide rod is rotated to remove the restriction shell, and the elastic support part is opened after losing the restriction, and the upper and lower ends are respectively against the two adjacent vertebrae of the fiber ring. The elastic support part can provide a reverse force when the vertebrae are relatively displaced, thereby playing a buffering role to avoid wear between the vertebrae, and barbs can also be provided on the outer edge of the elastic support part, and the barbs act on the vertebrae to improve the stability between the elastic support part and the vertebrae. The invention is easier to operate and can avoid further enlarging the annulus fibrosus opening and causing further damage to the annulus fibrosus.

[0017] Insufficient equipment:

[0018] 1) The first blocking part is deformed by rotating the first guide rod, which may damage the integrity of the inner occluder; and the effect of reducing the cross-sectional diameter of the first blocking part is questionable. If the inner structure is soft enough, it is easy to enter if it is deformed, and it is easy to escape if it is deformed. The sealing effect needs to be verified.

[0019] 2) The second occluder is outside the rupture and fixed to the vertebrae, and is provided with barbs to grasp the vertebrae to enhance the fixation effect, which may cause further damage to the annulus fibrosus and vertebrae.

[0020] 3) The second occluder has a channel with internal threads in the middle, which does not play a role in the sealing effect of the annulus fibrosus. The entire device is a hollow structure with no actual structure that can be blocked, and the blocking effect of the entire device is questionable.

[0021] 3. Annular fiber plugging device (publication number: CN114521998A)

[0022] Device composition: The fiber annulus plugging device includes a frame, a first clamping assembly and a driving assembly. The first clamping assembly includes a first clamping part and a second clamping part, one of which is fixed on the frame, and the other is movably arranged on the frame, and the two can approach each other to clamp the fiber annulus or move away from each other to release the fiber annulus. The driving assembly is arranged on the frame, and the driving assembly is connected to the other of the first clamping part and the second clamping part so as to drive the other of the first clamping part and the second clamping part. An annular groove is provided on the peripheral wall surface of the operating part, and the annular groove is arranged along the circumference of the operating part. The frame is provided with an anti-retraction protrusion for matching in the annular groove, which can improve the overall stability.

[0023] Insufficient equipment:

[0024] 1) Barbs are provided on the metal clamp to enhance the fixation of the occluder and the annulus fibrosus, but this may further damage the annulus fibrosus;

[0025] 2) The device is relatively complex and the manufacturing cost is relatively high;

[0026] 3) The entire device is made of solid metal, which completely blocks the chance of the annulus fibrosus healing and leads to more complications in the later stages.

[0027] 4. A fiber ring occluder (publication number: CN208492261U)

[0028] The occluder consists of a tubular stent, a connector and a disc-shaped stent connected in sequence. The tubular stent has a mesh structure, is hollow inside, and is cylindrical or dumbbell-shaped. The tubular stent is woven with superelastic memory alloy wire (nickel-titanium alloy). The tubular stent is any one of a single-layer mesh structure, a double-layer mesh structure and a multi-layer mesh structure. The disc-shaped stent has a mesh structure, which is umbrella-shaped or mushroom-shaped, and a metal fixing piece for closing the mesh surface is arranged in the center. The edge of the disc-shaped stent is provided with a plurality of barbed hooks, which are tightly combined with the fiber ring cracks to prevent the built-in stent from falling out. The stent is provided with a stent coating made of fiber material to more effectively repair the defect of the fiber ring. The connector connects the tubular stent and the disc-shaped stent.

[0029] Insufficient equipment:

[0030] 1) The tubular stent is placed at the rupture to block it like a plug, and the disc-shaped stent is located outside the annulus fibrosus to clamp the occlusion device to prevent it from sinking in. The risk of the entire device being withdrawn is high;

[0031] 2) The barbs on the tubular structure are in direct contact with the rupture, but the quality of the annulus fibrosus around the rupture is relatively poor, and such a setting may further damage the annulus fibrosus;

[0032] 3) There is a metal fixing piece in the center of the disc-shaped stent to close the mesh surface, which is difficult to achieve in the narrow minimally invasive surgical space;

[0033] 4) A relatively expensive shape memory alloy is used, but its shape memory function is not fully utilized. The function described in the patent can also be achieved by using metal with good toughness without emphasizing the use of shape memory alloy. Summary of the invention

[0034] The technical problem to be solved by the present invention is to provide a fiber ring plugging and repairing device to solve the problems that the existing fiber ring repairing device has poor plugging effect, is not conducive to the healing of the fiber ring itself, and affects the biomechanical characteristics of the intervertebral disc itself.

[0035] To solve the above problems, the technical solution of the present invention is:

[0036] The fiber ring occluding and repairing device of the present invention comprises: an occluding stent woven from memory metal wires, a coating woven on the occluding stent and an operating component, the occluding stent comprising an inner clamping leaf, a occluding portion and an outer clamping leaf, the fiber direction of the coating on the surface of the inner clamping leaf is consistent with the fiber direction of the innermost fiber ring, the fiber direction of the coating on the surface of the outer clamping leaf is consistent with the fiber direction of the outermost fiber ring, and a connecting portion is provided on the outer clamping leaf for detachable connection with the operating component; the operating component is connected to the connecting portion during installation, and the operating component is separated from the connecting portion after the occluding and repairing device reaches a predetermined position and produces a predetermined deformation; wherein, after the predetermined deformation occurs, the unfolded area of ​​the inner clamping leaf and the outer clamping leaf is larger than the rupture area of ​​the fiber ring.

[0037] In a preferred embodiment of the present invention, after the predetermined deformation occurs, the sealing portion is cylindrical, the end of the sealing portion close to the inner clamping leaf has a first weaving density, the end of the sealing portion close to the outer clamping leaf has a second weaving density, and the first weaving density is greater than the second weaving density.

[0038] In a preferred embodiment of the present invention, the weaving density of the sealing portion in the direction from the inner layer clamping leaves to the outer layer clamping leaves tends to gradually decrease.

[0039] In a preferred embodiment of the present invention, the cylindrical middle position of the sealing portion has a third weaving density, the first weaving density is greater than the third weaving density, and the third weaving density is greater than the second weaving density.

[0040] In a preferred embodiment of the present invention, after the predetermined deformation occurs, the distance between the inner clamping leaves and the outer clamping leaves is slightly smaller than the radial thickness of the fiber annulus.

[0041] In a preferred embodiment of the present invention, the covering membrane is woven from biological fiber material.

[0042] In a preferred embodiment of the present invention, the outer clamping leaves are circular after the predetermined deformation occurs, and the connecting portion is arranged at the center of the circle.

[0043] In a preferred embodiment of the present invention, the coating has a porous structure.

[0044] In a preferred embodiment of the present invention, the memory metal wire is a nickel-titanium alloy wire.

[0045] In a preferred embodiment of the present invention, the distance between the inner layer clamping leaves and the outer layer clamping leaves close to the blocking portion is smaller than the distance close to the edge.

[0046] In a preferred embodiment of the present invention, the area of ​​the film covering the surface of the inner clamping leaf is larger than the area of ​​the inner clamping leaf, and the area of ​​the film covering the surface of the outer clamping leaf is larger than the area of ​​the outer clamping leaf.

[0047] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0048] 1. The fiber ring occlusion and repair device of the present invention has a simple structure and is easy to operate. It only requires insertion and withdrawal operations, can be operated in a small space, and has a short operation time.

[0049] 2. The cost of the present invention is mainly the cost of raw materials of the memory metal stent, and the supporting surgical tools are relatively simple and the cost is not high;

[0050] 3. The distance between the inner clamping leaf and the outer clamping leaf of the present invention is slightly smaller than the radial thickness of the annulus fibrosus. The shape memory function of the memory metal is used to fix the annulus fibrosus by the clamping force of the inner and outer clamping leaves, so as to achieve a close fit with the annulus fibrosus without additionally destroying the annulus fibrosus and vertebrae. At the same time, the double-layer plugging of the inner and outer clamping leaves can achieve a better sealing effect and further reduce the risk of re-herniation of the nucleus pulposus.

[0051] 4. The fiber direction of the inner layer of the clamping leaf film is consistent with that of the inner layer of the fiber ring, and the fiber direction of the outer layer of the clamping leaf film is consistent with that of the outer layer of the fiber ring, which better preserves the force mode of the fiber ring itself; at the same time, the porous fiber film increases the friction force while providing conditions for the survival and reproduction of fiber cells, promoting the healing of the fiber ring;

[0052] 5. The coating of the occluding device of the present invention is set to a gradient density, with the density of the inner layer clamping leaf being the highest and the density of the outer layer clamping leaf being the lowest, which is more conducive to the survival and reproduction of different types of fibroblasts in the inner, middle and outer layers of the annulus fibrosus, and effectively solves the problem of poor repair of the inner side of the annulus fibrosus in general repair methods;

[0053] 6. The coating of the present invention is woven with biological fibers, has good biocompatibility, and is beneficial to the healing of the annulus fibrosus. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the fiber ring plugging and repairing device of the present invention;

[0055] Figure 2 This is a schematic diagram of the fiber ring plugging and repairing device of the present invention in an unfolded state;

[0056] Figure 3 This is a schematic diagram of the fiber ring plugging and repairing device of the present invention in an unfolded state;

[0057] Figure 4This is a schematic diagram of the fiber ring plugging and repairing device of the present invention in an unfolded state;

[0058] Figure 5 This is a schematic diagram of the operation of the fiber ring plugging and repairing device of the present invention;

[0059] Explanation of the reference numerals: 1: annulus fibrosus occluding and repairing device; 10: occluding bracket; 101: inner clamping leaf; 102: occluding part; 103: outer clamping leaf; 1031: connecting part; 20: coating; 30: operating part. DETAILED DESCRIPTION

[0060] The fiber annulus plugging and repairing device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0061] Example

[0062] like Figure 1 FIG. 1 is a schematic diagram of the fiber ring plugging and repairing device 1 of the present invention when it is installed. Figures 2 to 4 The fiber ring blocking and repairing device 1 comprises: a blocking stent 10 woven from memory metal wire, a coating 20 woven on the blocking stent and an operating component 30, wherein the blocking stent 10 comprises an inner clamping leaf 101, a blocking portion 102 and an outer clamping leaf 103, wherein the fiber direction of the coating on the surface of the inner clamping leaf 101 is consistent with the fiber direction of the innermost fiber ring, and the fiber direction of the coating on the surface of the outer clamping leaf 103 is consistent with the fiber direction of the outermost fiber ring, and a connecting portion 1031 is provided on the outer clamping leaf 103 for detachable connection with the operating component 30; during installation, the operating component 30 is connected to the connecting portion 1031, and after the blocking and repairing device 1 reaches a predetermined position and produces a predetermined deformation, the operating component 30 is separated from the connecting portion 1031; wherein, after the predetermined deformation is produced, the unfolded area of ​​the inner clamping leaf 101 and the outer clamping leaf 103 is larger than the rupture area of ​​the fiber ring.

[0063] By setting the fiber direction of the coating 2 on the surface of the inner clamping leaf 101 to be consistent with the fiber direction of the innermost annulus fiber, and setting the fiber direction of the coating 2 on the surface of the outer clamping leaf 103 to be consistent with the fiber direction of the outermost annulus fiber, the force-bearing mode of the annulus fiber itself can be better retained, which helps the repair of the annulus fiber. Since the unfolded area of ​​the inner clamping leaf 101 and the outer clamping leaf 103 is larger than the rupture area of ​​the annulus fiber after the predetermined deformation occurs, the contact area between the occluding and repairing device 1 and the annulus fiber is increased. At the same time, since the coating 2 is woven with biological fibers and has a porous and rough surface, it can increase the friction between the annulus fiber and reduce the risk of the occluding and repairing device 1 coming out and shifting. The connecting portion 1031 is detachably connected to the operating component 30, which is convenient for operation during surgery.

[0064] Optionally, the connection portion 1031 is detachably connected to the operating component 30, and the detachable connection may be a threaded connection.

[0065] Optionally, the connecting portion 1031 is detachably connected to the operating component 30, and a receiving cavity and a limiting portion may be provided on the connecting portion 1031. The front end of the operating component 30 extends into the receiving cavity and rotates. When it is rotated to a preset position, the limiting portion fixes the position of the operating component 30. When disassembly is required, the operating component 30 can be easily disassembled by rotating it in the opposite direction.

[0066] Preferably, after the predetermined deformation occurs, the sealing portion 102 is cylindrical, the end of the sealing portion 102 close to the inner clamping leaf 101 has a first weaving density, the end of the sealing portion close to the outer clamping leaf 103 has a second weaving density, and the first weaving density is greater than the second weaving density.

[0067] Since the annulus fibrosus is divided into an inner layer, a middle layer, and an outer layer, and the three layers are arranged in a concentric circle, the inner layer is a fibrocartilage band, and a metal stent with a larger weaving density is conducive to its repair, and the outer layer is mainly composed of collagen fibers, and a metal stent with a lower weaving density is more conducive to its repair. Therefore, setting the weaving density of the two ends of the occluding part 102 to different weaving densities is conducive to the repair of the inner and outer parts of the annulus fibrosus.

[0068] Preferably, the weaving density of the blocking part 102 is gradually reduced along the direction from the inner layer clamping leaf 101 to the outer layer clamping leaf 103. The blocking part 103 stent is set to a gradient density, and the corresponding weaving density is set according to the difference between the inner and outer sides of the annulus fibrosus, which is more conducive to the survival and reproduction of different types of fiber cells, and effectively solves the problem of poor repair of the inner side of the annulus fibrosus in general repair methods.

[0069] Preferably, the cylindrical middle position of the occluding portion 103 has a third braiding density, the first braiding density is greater than the third braiding density, and the third braiding density is greater than the second braiding density. In order to further achieve a better repair effect of the annulus fibrosus, a braiding density between the first braiding density and the second braiding density is set in the middle position of the occluding portion 103.

[0070] Preferably, after the predetermined deformation occurs, the distance between the inner clamping leaf 101 and the outer clamping leaf 103 is slightly smaller than the radial thickness of the annulus fibrosus. After the occlusion repair device 1 is deployed, a clamping force is applied to the annulus fibrosus. In addition, the rough coating 20 on the surface of the inner clamping leaf 101 and the outer clamping leaf 103 increases the friction between the annulus fibrosus and further reduces the risk of dislocation and displacement.

[0071] Preferably, the coating 20 is woven from biological fiber materials, which have good biocompatibility and are beneficial to the repair of the annulus fibrosus.

[0072] Preferably, the outer clamping leaf 103 is circular after the predetermined deformation, and the connecting portion 1031 is arranged at the center of the circle. This arrangement is to maintain the force balance during the operation and after installation as much as possible, facilitate operation and reduce the risk of disengagement.

[0073] Preferably, the coating 20 has a porous structure. Providing the coating 20 with a porous structure is beneficial to the attachment and reproduction of fibroblasts and promotes the healing of the annulus fibrosus.

[0074] Preferably, the memory metal wire is a nickel-titanium alloy wire. By utilizing the memory property of nickel-titanium alloy, the first form (i.e., being folded together) is maintained in a low-temperature environment before implantation, which significantly reduces the volume of the device and allows the inner part of the occlusion repair device to be placed inside the annulus fibrosus. Figure 5 As shown, under the guidance of the operating component 30, the occluding repair device 1 to be implanted is gradually placed inside the annulus fibrosus through the rupture of the annulus fibrosus. When the connection portion is located near the outermost surface of the annulus fibrosus, the occluding repair device 1 is stopped from being transported and kept still until the occluding repair device 1 is unfolded (i.e., restored to the "I" shape) under the action of body temperature. Then the operating component 30 can be disassembled. In the unfolded state, the inner layer clamping leaf 101 is placed inside the rupture of the annulus fibrosus, and the outer layer clamping leaf 103 is placed outside the rupture of the annulus fibrosus.

[0075] Preferably, the distance between the inner layer clamping leaf 101 and the outer layer clamping leaf 103 near the blocking portion 102 is smaller than the distance near the edge. The reason for this arrangement is that after the annulus fibrosus is ruptured, its rupture is generally irregular. According to the above arrangement, the blocking repair device has good biocompatibility, and the porous structure of the membrane woven by biological fibers can be more conducive to the attachment and proliferation of fibroblasts, thereby promoting the healing of the annulus fibrosus.

[0076] Preferably, the area of ​​the coating on the surface of the inner clamping leaf is larger than the area of ​​the inner clamping leaf 101, and the area of ​​the coating on the surface of the outer clamping leaf is larger than the area of ​​the outer clamping leaf 103. The coating completely wraps the clamping leaf to avoid scratching the intervertebral disc when the occluding stent is unfolded to restore its shape. Figure 3 For coated ones, Figure 4 There is no film covering.

[0077] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A fiber ring plugging and repairing device, characterized in that: include: A blocking stent woven from memory metal wires, a coating woven on the blocking stent, and an operating component, wherein the blocking stent comprises an inner clamping leaf, a blocking portion, and an outer clamping leaf, wherein the fiber direction of the coating on the surface of the inner clamping leaf is consistent with the fiber direction of the innermost fiber ring, and the fiber direction of the coating on the surface of the outer clamping leaf is consistent with the fiber direction of the outermost fiber ring, and a connecting portion is provided on the outer clamping leaf for detachably connecting with the operating component; During installation, the operating component is connected to the connecting portion, and after the blocking and repairing device reaches a predetermined position and undergoes a predetermined deformation, the operating component is separated from the connecting portion; Among them, after the predetermined deformation is generated, the expanded area of ​​the inner clamping leaves and the outer clamping leaves is larger than the rupture area of ​​the fiber ring, the sealing part is cylindrical, and the distance between the inner clamping leaves and the outer clamping leaves close to the sealing part is smaller than the distance close to the edge side. The end of the sealing part close to the inner clamping leaves has a first weaving density, the end of the sealing part close to the outer clamping leaves has a second weaving density, and the cylindrical middle position of the sealing part has a third weaving density, the first weaving density is greater than the third weaving density, and the third weaving density is greater than the second weaving density.

2. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The weaving density of the blocking portion in the direction from the inner layer clamping leaves to the outer layer clamping leaves tends to gradually decrease.

3. The fiber annulus plugging and repairing device according to claim 1, characterized in that: After the predetermined deformation occurs, the distance between the inner clamping leaves and the outer clamping leaves is slightly smaller than the radial thickness of the fiber ring.

4. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The covering membrane is woven from biological fiber materials.

5. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The outer clamping leaf is circular after a predetermined deformation occurs, and the connecting portion is arranged at the center of the circle.

6. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The coating has a porous structure.

7. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The memory metal wire is a nickel-titanium alloy wire.

8. The fiber annulus plugging and repairing device according to claim 1, characterized in that: The area of ​​the film covering the surface of the inner layer clamping leaves is larger than the area of ​​the inner layer clamping leaves, and the area of ​​the film covering the surface of the outer layer clamping leaves is larger than the area of ​​the outer layer clamping leaves.

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