A mitral valve clip and its retrieval device with an anti-detachment structure

Abstract

The present invention relates to the technical field of surgical instruments, and specifically discloses a mitral valve clip with an anti-detachment structure and its recovery device. Aiming at the problem that the barbs of the existing mitral valve clip will increase the degree of damage to adjacent valve leaflets when the force is too large. It includes a fixing rod, the fixing rod is fixedly connected with a fixing frame, the fixing rod is fixedly connected with symmetrically distributed first elastic members, the first elastic members are fixedly connected with pressing members, the pressing members are fixedly connected with arc-shaped frames, the arc-shaped frames are slidably connected with symmetrically distributed sliding members, and the pressing members are fixedly connected with uniformly distributed elastic hooks. When the force on the elastic hooks increases, the present invention increases the pressing force between the sliding members and adjacent components and the adjacent valve leaflets, while preventing the adjacent valve leaflets from falling off, reducing the damage of the elastic hooks to the adjacent valve leaflets, avoiding additional damage to the valve leaflets, and thus enabling the device to better complete the work of improving mitral regurgitation in patients.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically discloses a mitral valve clip with an anti - shedding structure and its retrieval device. Background Art

[0002] A mitral valve clip is a medical device used to treat mitral regurgitation. The mitral valve clip actively clamps two leaflets of a patient's mitral valve, drags the two leaflets together to a middle closing position, and reduces or eliminates the mitral regurgitation of the patient. Existing mitral valve clips usually have a barbed structure. The barbed structure hooks adjacent leaflets to increase the fastening force between the mitral valve clip and the patient's leaflets to prevent the connection between the mitral valve clip and the adjacent leaflets from failing. However, the barbs will cause damage to adjacent leaflets during use. When the patient's heartbeat is intense, the force exerted on the leaflets by the heart beating gradually increases. At this time, the barbs exert a force on the leaflets in the direction opposite to the movement direction of the leaflets to maintain the fixation between the leaflets and the mitral valve clip. This results in the force of interaction between the leaflets and the adjacent barbs increasing with the intensity of the patient's heartbeat. During the process of the barbs and the patient's mitral valve leaflets pulling on each other, the part of the leaflet hooked by the barbs is more likely to be damaged, which in turn weakens the fixation effect between the mitral valve clip and the mitral valve leaflets, and the relative sliding between the mitral valve clip and the mitral valve leaflets gradually becomes larger, making it difficult for the mitral valve clip to stably inhibit mitral regurgitation. Summary of the Invention

[0003] In order to overcome the drawback that the barbs of the existing mitral valve clip will cause an increase in the degree of damage to adjacent leaflets when the force is too large, the present invention provides a mitral valve clip with an anti - shedding structure and its retrieval device.

[0004] The technical solution of the present invention is: a mitral valve clip with an anti-falling structure, comprising a fixed rod, the fixed rod is fixedly connected to a fixed frame, a side of the fixed rod close to the fixed frame is fixedly connected to a symmetrically distributed first elastic member, the first elastic member is fixedly connected to an extrusion member, a moving rod is slidably connected inside the fixed rod, a side of the moving rod close to the fixed frame is fixedly connected to the moving frame, the moving frame is fixedly connected to a symmetrically distributed second elastic member, the second elastic member is fixedly connected to an outer splint, the outer splint is rotatably connected to the fixed frame, and the extrusion member is fixedly connected to an arc-shaped The frame is slidably connected with symmetrically distributed sliding parts, the side of the extrusion part away from the fixed rod is fixed with evenly distributed elastic hooks, the extrusion part is fixed with evenly distributed limiting frames, the limiting frame is slidably connected to the adjacent elastic hooks, the elastic hooks are slidably connected to the adjacent sliding parts, the side of the sliding part close to the adjacent extrusion part is fixed with evenly distributed extrusion plates, the fixed rod is provided with a toggle mechanism for actively driving all the sliding parts to move, and the side of the fixed rod away from the fixed frame is provided with a limiting mechanism for limiting the moving rod.

[0005] Furthermore, the elastic hook is composed of two parts, the part of the elastic hook close to the adjacent extrusion member is made of elastic material, and the part of the elastic hook away from the adjacent extrusion member is made of rigid material. The extrusion plates and the elastic hooks evenly distributed on the same extrusion member are staggered, a pull rope is provided on the side of the extrusion member away from the fixing frame, the fixing frame is fixed with a guide plate, and the connection between the guide plate and the fixing frame is elastic.

[0006] Furthermore, the sliding member is provided with evenly distributed sliding grooves, and the sliding member is slidably connected to the adjacent elastic hooks through the sliding grooves, and the sliding grooves on the sliding member gradually incline from a side away from the fixing frame to a side close to the fixing frame and toward a side away from the fixing rod.

[0007] Furthermore, the extruded piece is a triangular prism, and one of its edges is aligned with the middle of the adjacent outer clamping plate.

[0008] Furthermore, the toggle mechanism includes a fixing ring, which is fixed to a side of the fixing rod away from the fixing frame, a side of the fixing ring close to the fixing frame is fixed with a symmetrically distributed third elastic member, the symmetrically distributed third elastic members are commonly fixed with a sliding frame, the sliding member is extruded and matched with the sliding frame, the sliding frame is slidably connected to the fixing rod, a through hole is provided on the side of the fixing rod away from the fixing frame, the sliding frame is fixed with a symmetrically distributed first elastic limiting member near the through hole on the fixing rod, and the moving rod is provided with a limiting groove that is limited and matched with the adjacent first elastic limiting member.

[0009] Furthermore, the limiting mechanism includes symmetrically distributed first extrusion blocks, which are symmetrically distributed and are all slidably connected to the side of the fixed rod away from the fixed frame, and the side of the fixed rod close to the adjacent first extrusion block is slidably connected to the second extrusion block, the second extrusion block is extruded and matched with the adjacent first extrusion block, a fourth elastic member is fixed between the second extrusion block and the fixed rod, and the second extrusion block is limitedly matched with the movable rod.

[0010] The present invention also proposes a recovery device for a mitral valve clamp, comprising a conveying frame and the above-mentioned mitral valve clamp with an anti-falling structure, the conveying frame is slidably connected to a sliding cylinder, the sliding cylinder is threadedly connected to a first rotating wheel, the first rotating wheel is rotatably connected to a support plate, the support plate of the first rotating wheel is rotatably connected to an internal connecting rod, the internal connecting rod is slidably and rotatably connected to the sliding cylinder, the sliding cylinder is rotatably connected to a symmetrically distributed second rotating wheel, the sliding cylinder is slidably and rotatably connected to a symmetrically distributed sliding rod through a bracket, the sliding rod and the adjacent second rotating wheel are driven by a gear set, and the sliding rod is fixed A worm is connected, the sliding cylinder is fixed with symmetrically distributed fixed blocks that are respectively connected to adjacent worm gears for transmission, the sliding cylinder is fixed with an external connecting rod on the side away from the first rotating wheel, the internal connecting rod passes through the external connecting rod, the sliding cylinder is provided with symmetrically distributed rotating rollers, the pull rope is wound around adjacent rotating rollers, the sliding rod is rotatably connected to a driving rod, the driving rod is slidably connected to the sliding cylinder, the first extrusion block is extruded and matched with the external connecting rod, the external connecting rod is provided with a connecting mechanism for connecting itself to the fixed rod, and the internal connecting rod is provided with a clamping component for connecting itself to the moving rod.

[0011] Furthermore, the connecting mechanism includes a first sliding ring, which is slidably connected to the side of the external connecting rod close to the fixed rod, and the side of the external connecting rod close to the fixed rod is slidably connected to the second sliding ring, the first sliding ring and the second sliding ring are respectively fixed to the adjacent driving rods, the second sliding ring is rotatably connected to a circumferentially evenly distributed limiting jaws, the limiting jaws are rotatably connected to a pull rod, the pull rod is rotatably connected to the first sliding ring, and the fixed rod is provided with a groove that simultaneously limits and cooperates with the circumferentially evenly distributed limiting jaws.

[0012] Furthermore, the limiting clamping jaws uniformly distributed in the circumferential direction are fixedly connected with an elastic sleeve.

[0013] Further, the clamping component includes a connecting block, the connecting block is fixedly connected to one side of the inner connecting rod close to the moving rod, symmetrically distributed second elastic limit members are fixedly connected to the connecting block, the moving rod is provided with grooves facilitating the insertion of adjacent second elastic limit members, and an inclined surface for squeezing and cooperating with adjacent second elastic limit members is arranged on one side of the moving rod close to the connecting block.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: when the elastic hook is subjected to an increased force, the squeezing force between the sliding member and adjacent components and adjacent valve leaflets is increased. While preventing the adjacent valve leaflets from falling off, the damage to the adjacent valve leaflets caused by the elastic hook is reduced, avoiding additional damage to the valve leaflets, and thus enabling the device to better complete the work of improving the mitral regurgitation of patients.

[0015] When the outer splint of the present invention is opened, the sliding frame is actively controlled to squeeze adjacent sliding members, thereby actively controlling the movement of components such as the elastic hook, avoiding damage to the valve leaflets when the outer splint releases the adjacent valve leaflets, increasing the safety of the device, and after the adjacent outer splints and adjacent pressing members clamp the valve leaflets, the guide plate hinders the blood flow from the lower side of the valve leaflet upward, increasing the effect of the device in inhibiting the cardiac regurgitation of patients.

[0016] Through the mutual cooperation of the first sliding ring and the second sliding ring, the present invention controls the circumferentially uniformly distributed limit clamping jaws to clamp or release the fixing rod, so as to increase the accuracy of observation inside the patient's heart, and still be able to normally restore the connection between the outer connecting rod and the fixing rod after observation, adjust the position of the fixing rod and adjacent components, and thus enhance the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is an exploded view of the fixing rod, pressing member and outer splint of the present invention;

[0019] Figure 3 is an exploded view of the moving rod, pressing member and outer splint of the present invention;

[0020] Figure 4 is a cross-sectional view of the fixing rod, fixing ring and sliding frame of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the sliding member, elastic hook and pressing plate of the present invention;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the moving rod, first pressing block and second pressing block of the present invention;

[0023] Figure 7Schematic three-dimensional structure diagram of the conveying frame, sliding cylinder and first runner of the present invention;

[0024] Figure 8 Schematic three-dimensional structure diagram of the conveying frame, sliding cylinder and internal connecting rod of the present invention;

[0025] Figure 9 Schematic three-dimensional structure diagram of the sliding cylinder, internal connecting rod and driving rod of the present invention;

[0026] Figure 10 Schematic three-dimensional structure diagram of the external connecting rod, driving rod and first sliding ring of the present invention;

[0027] Figure 11 Cross-sectional view of the first sliding ring, second sliding ring and limiting jaw of the present invention;

[0028] Figure 12 Schematic three-dimensional structure diagram of the internal connecting rod, external connecting rod and connecting block of the present invention.

[0029] The labels in the figure are: 1 - fixed rod, 2 - fixed frame, 201 - deflector, 3 - first elastic member, 4 - extrusion member, 5 - moving rod, 6 - moving frame, 7 - second elastic member, 8 - outer clamping plate, 9 - arc-shaped frame, 10 - sliding member, 11 - elastic hook, 12 - limiting frame, 13 - extrusion plate, 14 - pulling rope, 15 - fixed ring, 16 - third elastic member, 17 - sliding frame, 18 - first elastic limiting member, 19 - first extrusion block, 191 - second extrusion block, 192 - fourth elastic member, 20 - conveying frame, 21 - sliding cylinder, 22 - first runner, 23 - internal connecting rod, 24 - second runner, 25 - sliding rod, 251 - fixed block, 26 - external connecting rod, 27 - driving rod, 28 - first sliding ring, 29 - second sliding ring, 30 - limiting jaw, 31 - pull rod, 32 - elastic sleeve, 33 - connecting block, 34 - second elastic limiting member. Detailed implementation manners

[0030] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] Embodiment 1: Existing mitral valve clip appliers usually increase the fastening force between the clip applier and adjacent leaflets through barbs to prevent the mitral valve clip applier from falling off the adjacent leaflets. However, when the patient's heart beats violently, the force between the barbs and the mitral valve clip applier will increase instantaneously, resulting in excessive squeezing force on the leaflets of the patient's mitral valve by the barbs, causing damage to the leaflets and putting the patient in a relatively dangerous state.

[0032] To address the above problems, the present invention proposes a mitral valve clip applier with an anti-detachment structure. Refer to Figures 1-5As shown in the figure, it includes a fixed rod 1. A fixed bracket 2 is fixedly connected to the lower side of the fixed rod 1. A flow guide plate 201 is fixedly connected to the fixed bracket 2. The connection between the flow guide plate 201 and the fixed bracket 2 has elasticity. The flow guide plate 201 is a zither-shaped plate, and its middle part is slightly inclined downward compared to its left and right edges. When the pressing member 4 and the outer clamping plate 8 cooperate to clamp the patient's heart valve leaf, the two flow guide plates 201 are just located on the lower side of the patient's heart valve leaf. When the patient's heart pumps blood downward, the blood contacts the adjacent flow guide plate 201 after passing through the patient's heart valve leaf, impacting the flow guide plate 201 to bend downward and open, and the flow guide plate 201 does not obstruct the blood flow. When the patient's heart contracts and the blood flows upward on the lower side, the blood impacts the lower side of the flow guide plate 201, driving the flow guide plate 201 to bend upward. The flow guide plate 201 is closely attached to the patient's heart valve leaf, filling the gaps of the patient's heart valve leaf while preventing the blood from flowing upward in reverse. Two first elastic members 3 symmetrically distributed left and right are fixedly connected to the lower side of the fixed rod 1. The first elastic member 3 is an elastic plate and is in a preloaded state initially. The upper side of the first elastic member 3 is fixedly connected to a pressing member 4. The pressing member 4 is a triangular prism, and the edge closest to the adjacent outer clamping plate 8 is aligned with the middle part of the adjacent outer clamping plate 8. A moving rod 5 is slidably connected inside the fixed rod 1. The lower side of the moving rod 5 is fixedly connected to a moving bracket 6. Two second elastic members 7 symmetrically distributed left and right are fixedly connected to the upper side of the moving bracket 6. The second elastic member 7 is an elastic plate and is in a preloaded state initially. The elastic force of the second elastic member 7 is greater than the elastic force of the adjacent first elastic member 3. The upper side of the second elastic member 7 is fixedly connected to an outer clamping plate 8. The outer clamping plate 8 cooperates with the adjacent pressing member 4 to clamp the adjacent valve leaf under the action of the adjacent second elastic member 7. The outer clamping plate 8 is rotatably connected to the fixed bracket 2. Arc-shaped brackets 9 are fixedly connected to the opposite sides of the two pressing members 4. Two sliding members 10 symmetrically distributed front and back are slidably connected to the arc-shaped brackets 9. Elastic hooks 11 evenly distributed are fixedly connected to the two side surfaces of the pressing member 4 far away from the fixed rod 1. The elastic hook 11 consists of two parts. The upper part of the elastic hook 11 is made of an elastic material, and the lower part of the elastic hook 11 is made of a rigid material, and the lower part of the elastic hook 11 has a tip. Therefore, when the elastic hook 11 is subjected to the squeezing force of the adjacent valve leaf, the tip of the elastic hook 11 remains in contact with the adjacent valve leaf, and the elastic hook 11 bends and stores energy near the adjacent pressing member 4. A limiting frame 12 corresponding to all the elastic hooks 11 on it is fixedly connected to the pressing member 4. The limiting frame 12 is slidably connected to the adjacent elastic hook 11. The sliding member 10 is provided with evenly distributed sliding grooves. The sliding grooves on the sliding member 10 are gradually inclined toward the side away from the fixed rod 1 from top to bottom. The sliding member 10 is slidably connected to the rigid part of the adjacent elastic hook 11 through the sliding groove. Therefore, when the elastic hook 11 is subjected to an upward force, the elastic hook 11 drives the sliding member 10 and its components on it to move toward the adjacent valve leaf through the sliding groove. Pressing plates 13 evenly distributed are fixedly connected to the side of the sliding member 10 close to the adjacent pressing member 4. The evenly distributed pressing plates 13 and the evenly distributed elastic hooks 11 on the same pressing member 4 are staggered. The pressing plates 13 improve the friction force on the adjacent valve leaf by pressing the adjacent valve leaf.To prevent excessive squeezing between the leaflets and the adjacent elastic hooks 11, a pull rope 14 is provided on the upper side of the squeezing member 4, a toggle mechanism for actively driving all the sliding members 10 to move is provided on the fixed rod 1, and a limiting mechanism for limiting the moving rod 5 is provided on the lower side of the fixed rod 1.

[0033] Reference Figure 3 and Figure 4 As shown, the toggle mechanism includes a fixing ring 15 fixed to the upper side of the fixing rod 1, and two symmetrically distributed third elastic members 16 are fixed to the lower side of the fixing ring 15, and the third elastic members 16 are elastic plates. A sliding frame 17 is commonly fixed to the lower sides of the two third elastic members 16, and the sliding frame 17 is provided with evenly distributed inclined surfaces. The sliding frame 17 is squeezed and matched with all the sliding members 10 at the same time through the inclined surfaces. The sliding frame 17 is slidably connected to the fixing rod 1, and a through hole is provided on the upper side of the fixing rod 1. Two first elastic limiting members 18 symmetrically distributed on the left and right are fixed to the sliding frame 17 near the through hole on the fixing rod 1, and the first elastic limiting members 18 are elastic plates. A limiting groove that is limited and matched with the adjacent first elastic limiting members 18 is provided on the upper part of the moving rod 5, and the moving rod 5 drives the adjacent first elastic limiting members 18 to move together through the limiting groove.

[0034] Reference Figure 4 and Figure 6 As shown, the limiting mechanism includes two first extrusion blocks 19 symmetrically distributed front to back, the two first extrusion blocks 19 are both slidably connected to the upper side of the fixed rod 1, the upper side of the fixed rod 1 is slidably connected with a second extrusion block 191, the second extrusion block 191 is extruded and matched with the adjacent first extrusion block 19, when the first extrusion block 19 moves downward, the first extrusion block 19 squeezes the adjacent second extrusion block 191 to slide to the side away from the moving rod 5, a fourth elastic member 192 is fixedly connected between the second extrusion block 191 and the fixed rod 1, the fourth elastic member 192 is an elastic plate, the second extrusion block 191 is limited and matched with the moving rod 5, when the second extrusion block 191 is limited and matched with the moving rod 5, the moving rod 5 and the fixed rod 1 are in a relatively fixed state.

[0035] When medical staff use the device to perform surgery on patients, they first connect the existing conveying device with the fixed rod 1 and the moving rod 5, and then control the fixed rod 1 and the moving rod 5 to move. At this time, the first extrusion block 19 is squeezed by the conveying device and is completely compressed in the fixed rod 1. The first extrusion block 19 squeezes the adjacent second extrusion block 191, so that the two second extrusion blocks 191 release the limit on the moving rod 5. The fourth elastic member 192 is compressed and stored. The medical staff pulls the guide plate 201 upward to fold the guide plate 201 to a vertical state, which is convenient for the guide plate 2 01 is inserted into the catheter, and the elastic part on the guide plate 201 is compressed and stored. The medical staff first transports the device to the patient's heart through the catheter. Then, under the monitoring of the ultrasound equipment, the medical staff moves the device to the lower side of the two leaflets of the patient's mitral valve through the conveying device. At this time, the fixed rod 1 and the adjacent parts leave the catheter, and the guide plate 201 opens downward under the action of its own elastic force. The medical staff then controls the moving rod 5 to move downward through the conveying device, and the moving rod 5 drives the moving frame 6, the second elastic member 7 and the first elastic limiter 18 to move downward together, and the second elastic member 7 The stored elastic force is gradually released. At this time, the two outer clamping plates 8 remain in place. The first elastic limiting member 18 drives the sliding frame 17 to move downward together. The sliding frame 17 drives the adjacent third elastic member 16 to stretch and store force. During the downward movement, the sliding frame 17 squeezes the adjacent sliding member 10 through its upper inclined surface. The sliding member 10 is squeezed and moves to the side away from the fixed rod 1. The sliding member 10 drives the adjacent elastic hook 11 to move through its upper sliding groove. The elastic hook 11 slides upward along the adjacent limiting frame 12. When the elastic force of the second elastic member 7 is completely released, the moving frame 6 follows the moving rod 5. During the movement, the second elastic member 7 continues to be driven downward, and the second elastic member 7 pulls the adjacent outer clamping plate 8 to swing downward and open. Then the first elastic limiting member 18 moves downward to the lowest side of the through hole on the fixed rod 1. The first elastic limiting member 18 is limited by the through hole on the fixed rod 1 and cannot move downward. As the moving rod 5 continues to move, it gradually releases the matching state with the adjacent first elastic limiting member 18. The sliding frame 17 moves upward and resets under the action of the elastic force of the third elastic member 16. The sliding member 10, elastic hook 11 and other components move and reset together under the drive of adjacent components.

[0036] During the process of the movable frame 6 pulling the adjacent outer splints 8 to swing downward and open through the second elastic member 7, the second elastic member 7 is stretched and stored, and the two outer splints 8 are located at the lower side of the two leaflets of the patient's mitral valve after opening. During the above process, the medical staff always tightens the two pull ropes 14, and the two pull ropes 14 respectively drag the two extrusion members 4 to keep them stationary. When the two outer splints 8 are fully opened, the medical staff controls the movable rod 5 to stop moving through the conveying device, and controls the fixed rod 1 and the adjacent parts to move upward as a whole through the conveying device. When the extrusion member 4 moves to the side of the adjacent leaflet, the medical staff The personnel controls the conveying device to stop moving, and then the medical staff gradually loosens the pull rope 14. When the medical staff loosens the pull rope 14, the elastic force stored in the first elastic member 3 begins to be released, and the extrusion member 4 gradually swings downward under the action of the elastic force of the adjacent first elastic member 3. Under the action of the elastic force of the adjacent first elastic member 3, the extrusion member 4 cooperates with the adjacent outer clamp 8 to clamp the leaflets of the adjacent mitral valve. The elastic hook 11 contacts the adjacent leaflets, and its tip increases the friction between the adjacent extrusion member 4 and the adjacent leaflets by piercing the surface of the adjacent leaflets, thereby preventing the adjacent leaflets from falling off due to force during movement.

[0037] When the extrusion piece 4 and the outer splint 8 cooperate to clamp the leaflets of the mitral valve, the medical staff controls the moving rod 5 to move upward and reset through the conveying device. The moving rod 5 drives the two outer splints 8 to swing upward and reset through the moving frame 6 and the two second elastic members 7. The change of elastic force on the second elastic member 7 is opposite to the above-mentioned downward movement process (and when the second elastic member 7 is reset to the initial position, a certain elastic force is stored on the second elastic member 7 again). The two outer splints 8 squeeze the adjacent leaflets and the extrusion piece 4 and swing upward and reset together. The first elastic member 3 is compressed and stored again. When the two outer splints 8 are completely reset, the moving rod 5 resumes the matching relationship with the first elastic limit member 18 according to the above-mentioned principle, and the leaflets of the mitral valve are clamped between the two extrusion pieces. 4 and the adjacent outer splints 8, and the valve leaflets are clamped by the two outer splints 8 and gathered toward the middle. At this time, the guide plate 201 is just located at the lower side of the patient's heart valve leaflets. The guide plate 201 fits with the heart valve leaflets under the action of its own elastic force. When the patient's heart pumps blood downward, the blood hits the guide plate 201 during the downward flow, and the guide plate 201 bends downward and opens under the action of its own elastic force. At this time, the guide plate 201 does not hinder the blood flow. When the patient's heart contracts, the blood on the lower side flows upward, and the blood hits the lower side of the guide plate 201, driving the guide plate 201 to bend upward. At this time, the guide plate 201 is in close contact with the patient's heart valve leaflets, hindering the blood from flowing back upward, thereby increasing the effect of the device in inhibiting the patient's mitral valve regurgitation.

[0038] After the two outer splints 8 cooperate to clamp the mitral valve, the medical staff observes the regurgitation of the patient's mitral valve through ultrasonic equipment. When regurgitation still exists in the patient's mitral valve, the medical staff re-opens the two outer splints 8 according to the above steps. The two outer splints 8 release the fixation of the adjacent leaflets. At this time, because the outer splints 8 are in the process of opening, the sliding parts 10 squeeze the adjacent elastic hooks 11 and move upward to ensure that the elastic hooks 11 no longer hook the adjacent leaflets, thereby avoiding the elastic hooks 11 from causing more damage to the adjacent leaflets. Then the medical staff controls the two outer splints 8 and adjacent components to re-clamp another leaflet according to the above steps.

[0039] When the two outer splints 8 and adjacent components completely clamp the leaflets of the patient's mitral valve, and the medical staff observes that there is no regurgitation in the patient's mitral valve, the medical staff releases the connection between the conveying device and the fixed rod 1 and the movable rod 5 in turn. When the conveying device releases its connection with the fixed rod 1, there is no longer an extrusion force between the first extrusion block 19 on the fixed rod 1 and the conveying device. The second extrusion block 191 moves toward the movable rod 5 under the elastic force of the adjacent fourth elastic member 192 to limit the movable rod 5. After being limited, the movable rod 5 is in a relatively fixed state with the fixed rod 1. At this time, the outer splint 8 and the adjacent extrusion member 4 are respectively clamped by the second elastic member 7 and the first elastic member 3 to clamp the adjacent leaflets, and the second extrusion block 191 simultaneously squeezes the adjacent first extrusion block 19 to move and reset.

[0040] When the heart beats violently, the force of the leaflets dragging the adjacent elastic hooks 11 increases (that is, the upward force exerted by the leaflets on the adjacent elastic hooks 11 increases), the leaflets squeeze the adjacent elastic hooks 11 and move together, the elastic hooks 11 move upward along the adjacent limit frames 12, the elastic hooks 11 bend and store force along the elastic portion on their upper sides, the elastic hooks 11 squeeze the adjacent sliding members 10 through the oblique grooves to move, the adjacent sliding members 10 move to the side away from the fixed rod 1, the sliding members 10 increase the squeezing force of the squeezing plates 13 thereon on the adjacent leaflets, thereby reducing the movement and reset of the leaflets, thereby reducing the pressure between the elastic hooks 11 and the leaflets, avoiding excessive force between the leaflets and the elastic hooks 11, resulting in excessive damage to the leaflets, and when the heart returns to calm, the leaflets reset downward driven by the elastic force of the adjacent elastic hooks 11, and the elastic hooks 11 drive the adjacent components to move and reset.

[0041] Embodiment 2: In an existing mitral valve clip delivery device, a device for retrieving the mitral valve clip is usually provided. The delivery device and the retrieval device are usually integrated. After the medical staff controls the mitral valve clip to clamp the mitral valve, if the clamping effect of the mitral valve clip on the mitral valve is not good, the medical staff activates the retrieval device to release the connection state between the mitral valve clip and the mitral valve, so as to control the mitral valve clip to clamp the mitral valve again. However, when the medical staff observes the clamping effect of the mitral valve clip, the existing retrieval device usually remains connected to the mitral valve clip. This causes the mitral valve clip to be subjected to not only the force transmitted by the heartbeat but also the stabilizing force transmitted by the existing retrieval device at this time. This will undoubtedly affect the fineness of the medical staff's observation of the clamping effect of the mitral valve clip, resulting in the situation that in some cases, the mitral valve clip has a good clamping effect when connected to the retrieval device, but the clamping effect of the mitral valve clip deteriorates after the connection is disconnected, resulting in an imperfect surgical outcome.

[0042] In view of the above problems, on the basis of Embodiment 1, the present invention proposes a retrieval device for a mitral valve clip, as shown in Figures 7-9 (the orientation relationship is as Figure 8As shown in the figure, it includes a conveying frame 20. A sliding cylinder 21 is slidably connected to the upper side of the conveying frame 20. A first runner 22 is threadedly connected to the right side of the sliding cylinder 21. The first runner 22 is rotatably connected to a support plate. An internal connecting rod 23 is rotatably connected to the support plate of the first runner 22. The internal connecting rod 23 is slidably and rotatably connected to the sliding cylinder 21. The staff manually controls the rotation of the internal connecting rod 23, and the first runner 22 drives the internal connecting rod 23 to slide left and right through the support plate. The sliding cylinder 21 is rotatably connected to two second runners 24 symmetrically distributed left and right. The sliding cylinder 21 is slidably and rotatably connected to two sliding rods 25 symmetrically distributed up and down through a bracket. The sliding rod 25 and the adjacent second runner 24 are driven by a gear set. The second runner 24 drives the adjacent sliding rod 25 to rotate through the gear set. A worm is fixedly connected to the sliding rod 25. Symmetrically distributed fixing blocks 251 are fixedly connected to the sliding cylinder 21. The fixing blocks 251 are provided with grooves in transmission connection with the adjacent worm. When the sliding rod 25 rotates, it slides left and right along the rack. An external connecting rod 26 is fixedly connected to the left side of the sliding cylinder 21. The end of the external connecting rod 26 is provided with an existing guiding mechanism, which is the same as the guiding mechanism of the existing conveying device and is used to control the turning of the end of the external connecting rod 26 in the patient's heart. The internal connecting rod 23 penetrates through the external connecting rod 26. The external connecting rod 26 is used to drive the fixing rod 1 to move, and the internal connecting rod 23 is used to drive the moving rod 5 to move. Two rotating rollers are symmetrically distributed front and back on the left side of the sliding cylinder 21. Two pull ropes 14 are respectively wound around the rotating rollers. The staff rotates the rotating rollers to pull the two pull ropes 14 to move. A driving rod 27 is rotatably connected to the left side of the sliding rod 25. The driving rod 27 is slidably connected to the sliding cylinder 21. Both first pressing blocks 19 are in pressing fit with the external connecting rod 26 to drive the two first pressing blocks 19 to move together. A connecting mechanism for connecting itself to the fixing rod 1 is provided on the external connecting rod 26, and a clamping component for connecting itself to the moving rod 5 is provided on the internal connecting rod 23.

[0043] Referring to Figure 10 and Figure 11 As shown in the figure, the connecting mechanism includes a first sliding ring 28 slidably connected to the lower side of the external connecting rod 26. A second sliding ring 29 is slidably connected to the lower side of the external connecting rod 26. The first sliding ring 28 and the second sliding ring 29 are respectively fixedly connected to the adjacent driving rod 27. The two driving rods 27 drive the first sliding ring 28 and the second sliding ring 29 to move respectively. Three limit claws 30 are circumferentially and evenly distributed and rotatably connected to the lower side of the second sliding ring 29. A groove is provided on the upper part of the fixing rod 1. The three limit claws 30 are simultaneously inserted into the groove of the fixing rod 1 to limit the fixing rod 1 and thus drive the fixing rod 1 to move together. A pull rod 31 is rotatably connected to the upper side of the limit claw 30. The pull rod 31 is rotatably connected to the first sliding ring 28. An elastic sleeve 32 is fixedly connected to the outside of the three limit claws 30. The elastic sleeve 32 is used to increase the clamping range when the three limit claws 30 clamp the fixing rod 1.

[0044] Referring to Figure 12 as shown, the clamping component includes a connecting block 33 fixedly connected to the lower side of the inner connecting rod 23. Two second elastic limiting members 34 are symmetrically distributed left and right on the connecting block 33. The second elastic limiting members 34 are elastic sheets. The initial state of the second elastic limiting members 34 is a state of storing energy. The second elastic limiting members 34 do not have elasticity in the vertical direction. When the outer sides of the second elastic limiting members 34 are squeezed by an object in the same plane during rotation, they contract inward. Grooves are provided on the inner side of the moving rod 5 to facilitate the insertion of adjacent second elastic limiting members 34. An inclined surface is provided on the upper side of the moving rod 5. The inclined surface on the upper side of the moving rod 5 squeezes the adjacent second elastic limiting members 34 in the vertical direction, causing the second elastic limiting members 34 to contract.

[0045] When medical staff use components such as the conveying frame 20 to replace the traditional conveying device, the medical staff connect the outer connecting rod 26 to the fixed rod 1 and connect the inner connecting rod 23 to the moving rod 5. The specific connection process is as follows:

[0046] The medical staff first align the connecting block 33 on the inner connecting rod 23 with the upper side of the moving rod 5. Then, the medical staff directly inserts the inner connecting rod 23 into the moving rod 5. The second elastic limiting members 34 retract and store energy into the connecting block 33 under the extrusion of the inclined surface on the upper side of the moving rod 5. When the connecting block 33 is completely inserted into the moving rod 5, the second elastic limiting members 34 are just aligned with the adjacent grooves. The second elastic limiting members 34 are inserted into the adjacent grooves under the action of their own elastic force. At this time, the inner connecting rod 23 drives the moving rod 5 to move together.

[0047] After the medical staff connect the inner connecting rod 23 and the moving rod 5, they first rotate the rear first runner 22. The rear first runner 22 drives the adjacent sliding rod 25 to rotate through the gear set. The rotation of the sliding rod 25 causes the worm on it to move upward along the adjacent rack (the following descriptions of the conveying frame 20 and adjacent components are all based on Figure 8 and Figure 10(described from a perspective), the worm on the sliding rod 25 drives the adjacent driving rod 27 to move upward together. The driving rod 27 drives the first sliding ring 28 to move upward. The first sliding ring 28 pulls the three pull rods 31 to move upward together. At this time, since the second sliding ring 29 does not move, the limiting claw 30 opens upward under the drive of the adjacent pull rod 31, and the elastic sleeve 32 is stretched under force. Subsequently, the medical staff moves the external connecting rod 26 to the upper side of the fixed rod 1 and controls the reverse rotation of the upper second runner 24 according to the above principle. The second runner 24 drives the three limiting claws 30 to close synchronously downward according to the same principle. The three limiting claws 30 cooperate to clamp the groove on the fixed rod 1. Subsequently, the staff rotates the two second runners 24 at the same time. The two second runners 24 drive the first sliding ring 28 and the second sliding ring 29 to move upward along the external connecting rod 26 together. The three limiting claws 30 remain in the clamped state and drive the fixed rod 1 to move towards the external connecting rod 26 until the external connecting rod 26 is in extrusion fit with the two first extrusion blocks 19 on the fixed rod 1 and squeezes the first extrusion block 19 into the fixed rod 1. The first extrusion block 19 drives the adjacent components to release the limit on the moving rod 5.

[0048] Subsequently, during the operation on the patient's heart, the medical staff drives the internal connecting rod 23 to move up and down by rotating the first runner 22. The internal connecting rod 23 drives the moving rod 5 to move up and down. The medical staff drives the adjacent pull ropes 14 to move by rotating the rotating roller. The pull ropes 14 control the swinging of the adjacent extrusion parts 4. The medical staff controls the depth of insertion of the external connecting rod 26 into the patient's heart by dragging components such as the sliding cylinder 21, and controls the turning of the end of the external connecting rod 26 inside the patient's heart through the guiding mechanism of the existing conveying device. After the medical staff controls the extrusion part 4 and the adjacent outer splint 8 to clamp the patient's mitral valve leaflets, they operate in the reverse direction according to the above same principle to control the three limiting claws 30 to release the fixed rod 1 inside the patient's heart. When the medical staff releases the connection between the external connecting rod 26 and the fixed rod 1 and the connection between the internal connecting rod 23 and the moving rod 5, they first control the external connecting rod 26 to stop squeezing the adjacent first extrusion block 19, so that the first extrusion block 19 and the adjacent components limit the moving rod 5. Subsequently, the medical staff rotates the internal connecting rod 23. The internal connecting rod 23 drives the connecting block 33 and the two second elastic limiting parts 34 to rotate together. The two second elastic limiting parts 34 gradually rotate out of the adjacent sliding grooves on the moving rod 5. Subsequently, the medical staff pulls out the internal connecting rod 23 from the moving rod 5 by rotating the first runner 22. Finally, the staff releases the connection between the three limiting claws 30 and the fixed rod 1 by rotating the second runner 24 on the right.

[0049] In addition, when medical staff observe the fixing effect of the two outer splints 8 and adjacent components on adjacent valve leaflets, they can temporarily disconnect the connection between the external connecting rod 26 and the fixing rod 1 and the connection between the internal connecting rod 23 and the moving rod 5, while ensuring that the pulling rope 14 is in a slack state to make the observation results more accurate. When the position of the fixing rod 1 needs to be adjusted, the medical staff re-control the three limit jaws 30 to clamp the fixing rod 1 according to the same principle as above. After reconnecting the external connecting rod 26 and the fixing rod 1, they push the internal connecting rod 23 into the moving rod 5 to restore the connection between the internal connecting rod 23 and the moving rod 5, so as to adjust the position of the fixing rod 1 and adjacent components to clamp the patient's heart valve leaflets again. Subsequently, the medical staff repeat the above operations. When the medical staff determine that the fixing rod 1 and adjacent components have completed clamping of the patient's mitral valve and determine that the patient's mitral regurgitation has been effectively inhibited, the medical staff disconnect the pulling rope 14 from the adjacent rotating roller, withdraw the pulling rope 14 from the patient's body, and gradually withdraw the external connecting rod 26 and adjacent components from the patient's body.

[0050] The above are only examples of the present invention and are not intended to limit the present invention. All equivalent replacements made within the principle of the present invention shall be included in the protection scope of the present invention. The content not elaborated in detail in the present invention belongs to the known prior art of those skilled in the art.

Claims

1. A mitral valve clip with an anti-drop structure, comprising a fixing rod (1), the fixing rod (1) being fixedly connected to a fixing frame (2), a side of the fixing rod (1) close to the fixing frame (2) being fixedly connected to a symmetrically distributed first elastic member (3), the first elastic member (3) being fixedly connected to an extrusion member (4), a moving rod (5) being slidably connected inside the fixing rod (1), a side of the moving rod (5) close to the fixing frame (2) being fixedly connected to a moving frame (6), the moving frame (6) being fixedly connected to a symmetrically distributed second elastic member (7), the second elastic member (7) being fixedly connected to an outer clamping plate (8), the outer clamping plate (8) being rotatably connected to the fixing frame (2), characterized in that: The invention also comprises an arc frame (9), wherein the arc frame (9) is fixedly connected to a side of the extrusion member (4) close to the fixed rod (1), the arc frame (9) is slidably connected to symmetrically distributed sliding members (10), the side of the extrusion member (4) away from the fixed rod (1) is fixedly connected to uniformly distributed elastic hooks (11), the extrusion member (4) is fixedly connected to uniformly distributed limiting frames (12), the limiting frames (12) are slidably connected to adjacent elastic hooks (11), the elastic hooks (11) are slidably connected to adjacent sliding members (10), the side of the sliding member (10) close to the adjacent extrusion member (4) is fixedly connected to uniformly distributed extrusion plates (13), the fixed rod (1) is provided with a toggle mechanism for actively driving all the sliding members (10) to move, and the side of the fixed rod (1) away from the fixed frame (2) is provided with a limiting mechanism for limiting the moving rod (5).

2. The mitral valve clip with an anti-drop structure according to claim 1, characterized in that: The elastic hook (11) is composed of two parts, the part of the elastic hook (11) close to the adjacent extrusion member (4) is made of elastic material, and the part of the elastic hook (11) away from the adjacent extrusion member (4) is made of rigid material. The extrusion plates (13) and the elastic hooks (11) evenly distributed on the same extrusion member (4) are arranged alternately. A pull rope (14) is provided on the side of the extrusion member (4) away from the fixing frame (2). The fixing frame (2) is fixedly connected with a guide plate (201), and the connection between the guide plate (201) and the fixing frame (2) is elastic.

3. The mitral valve clip with an anti-drop structure according to claim 2, characterized in that: The sliding member (10) is provided with evenly distributed sliding grooves, and the sliding member (10) is slidably connected to the adjacent elastic hook (11) via the sliding grooves, and the sliding grooves on the sliding member (10) gradually incline from a side away from the fixing frame (2) to a side close to the fixing frame (2) and then to a side away from the fixing rod (1).

4. The mitral valve clip with an anti-drop structure according to claim 3, characterized in that: The extruded part (4) is a triangular prism, and one of its edges is aligned with the middle of the adjacent outer clamping plate (8).

5. The mitral valve clip with an anti-drop structure according to claim 4, characterized in that: The toggle mechanism comprises a fixing ring (15), the fixing ring (15) being fixed to a side of the fixing rod (1) away from the fixing frame (2), a side of the fixing ring (15) close to the fixing frame (2) being fixed to a symmetrically distributed third elastic member (16), the symmetrically distributed third elastic members (16) being fixed to a sliding frame (17), the sliding member (10) being pressed and matched with the sliding frame (17), the sliding frame (17) being slidably connected to the fixing rod (1), a through hole being provided on a side of the fixing rod (1) away from the fixing frame (2), a symmetrically distributed first elastic stopper (18) being fixed to a position close to the through hole on the fixing rod (1), and the moving rod (5) being provided with a stopper groove which is stoppered and matched with an adjacent first elastic stopper (18).

6. The mitral valve clip with an anti-drop structure according to claim 5, characterized in that: The limiting mechanism comprises symmetrically distributed first extrusion blocks (19), the symmetrically distributed first extrusion blocks (19) are all slidably connected to the side of the fixed rod (1) away from the fixed frame (2), the side of the fixed rod (1) close to the adjacent first extrusion block (19) is slidably connected to the second extrusion block (191), the second extrusion block (191) is extruded and matched with the adjacent first extrusion block (19), a fourth elastic member (192) is fixedly connected between the second extrusion block (191) and the fixed rod (1), and the second extrusion block (191) is limitedly matched with the movable rod (5).

7. A retrieval device for a mitral valve clip, characterized in that: The invention comprises a conveying frame (20) and a mitral valve clipper with an anti-falling structure as claimed in claim 6, wherein the conveying frame (20) is slidably connected to a sliding cylinder (21), the sliding cylinder (21) is threadedly connected to a first rotating wheel (22), the first rotating wheel (22) is rotatably connected to a support plate, the support plate of the first rotating wheel (22) is rotatably connected to an internal connecting rod (23), the internal connecting rod (23) is slidably and rotatably connected to the sliding cylinder (21), the sliding cylinder (21) is rotatably connected to a symmetrically distributed second rotating wheel (24), the sliding cylinder (21) is slidably and rotatably connected to a symmetrically distributed sliding rod (25) through a bracket, the sliding rod (25) and the adjacent second rotating wheel (24) are driven by a gear set, the sliding rod (25) is fixedly connected to a worm, the sliding cylinder (2 1) fixedly connected with symmetrically distributed fixed blocks (251) respectively connected to adjacent worm gear transmissions, the sliding cylinder (21) is fixedly connected with an external connecting rod (26) on the side away from the first rotating wheel (22), the internal connecting rod (23) passes through the external connecting rod (26), the sliding cylinder (21) is provided with symmetrically distributed rotating rollers, the pull rope (14) is wound around adjacent rotating rollers, the sliding rod (25) is rotatably connected with a driving rod (27), the driving rod (27) is slidably connected to the sliding cylinder (21), the first extrusion block (19) is extruded and matched with the external connecting rod (26), the external connecting rod (26) is provided with a connecting mechanism for connecting itself with the fixed rod (1), and the internal connecting rod (23) is provided with a clamping component for connecting itself with the moving rod (5).

8. The retrieval device for a mitral valve clip according to claim 7, characterized in that: The connecting mechanism comprises a first sliding ring (28), the first sliding ring (28) being slidably connected to a side of the external connecting rod (26) close to the fixed rod (1), the side of the external connecting rod (26) close to the fixed rod (1) being slidably connected to a second sliding ring (29), the first sliding ring (28) and the second sliding ring (29) being respectively fixed to adjacent driving rods (27), the second sliding ring (29) being rotatably connected to a circumferentially uniformly distributed limiting jaw (30), the limiting jaw (30) being rotatably connected to a pull rod (31), the pull rod (31) being rotatably connected to the first sliding ring (28), and the fixed rod (1) being provided with a groove which is simultaneously limited and matched with the circumferentially uniformly distributed limiting jaw (30).

9. The retrieval device for a mitral valve clip according to claim 8, characterized in that: The limiting clamping claws (30) evenly distributed in the circumferential direction are fixedly connected to an elastic sleeve (32).

10. The retrieval device for a mitral valve clip according to claim 9, characterized in that: The clamping component comprises a connecting block (33), the connecting block (33) being fixedly connected to a side of the internal connecting rod (23) close to the moving rod (5), the connecting block (33) being fixedly connected to symmetrically distributed second elastic limiting members (34), the moving rod (5) being provided with a groove for facilitating the clamping of an adjacent second elastic limiting member (34), and the side of the moving rod (5) close to the connecting block (33) being provided with an inclined surface for extrusion-matching with an adjacent second elastic limiting member (34).

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