Valve clamping forceps

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a pair of valve clamping forceps which comprises a transmission part, a locking sleeve, a connecting arm, a first clamping arm and a locking part, the transmission part comprises a guide rod and a hinge seat arranged at the far end of the guide rod, and the guide rod is provided with a first clamping part; the locking sleeve slidably sleeves the guide rod; the first end of the connecting arm is hinged to the hinge seat; a first hinge part of the first clamping arm is hinged to the locking sleeve, and a second hinge part of the first clamping arm is hinged to the second end of the connecting arm; the locking piece is arranged on the locking sleeve and comprises an elastic main body and a second clamping part arranged on the elastic main body. Wherein the elastic main body has a natural state and a deformation state; in a natural state, the first clamping part is clamped with the second clamping part; in the deformation state, the first clamping part is separated from the second clamping part. According to the valve clamping forceps, the conditions that locking fails and the first clamping part and the second clamping part are locked and cannot be used are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a valve clamping forceps. Background Art

[0002] The mitral valve is a part of the heart that sits between the left atrium and the left ventricle. Blood is pumped from the left atrium into the left ventricle, and when the left ventricle contracts to pump blood to the body, the mitral valve closes to prevent blood from being pumped back into the left atrium. In some patients, due to genetic malformations, disease, or injury, the mitral valve does not close properly, resulting in a condition called regurgitation, in which blood is pumped into the atrium every time the heart muscle contracts. This is a serious and often rapidly worsening condition that reduces circulation efficiency.

[0003] At present, mitral regurgitation is one of the most common valvular diseases today. The main causes of the disease include mitral ring dilatation, chordae tendineae insufficiency, mitral myxomatous degeneration, valve leaflet prolapse, rheumatic heart valve disease, ischemic lesions, etc. Mitral valvuloplasty and artificial valve replacement are the most effective methods for treating mitral regurgitation. However, since the operation requires extracorporeal circulation technology support, it causes great trauma to the human body. For elderly patients and patients with more comorbidities, there are quite high complications and mortality rates.

[0004] In recent years, the mainstream mitral valve clipping devices on the market are divided into two types: implantation through femoral vein puncture and transapical implantation. As a key direction of cardiovascular device research and development at home and abroad, the transapical mitral valve clipping device delivers an implantable clip to the vicinity of the mitral valve through the apex of the heart, clamps and fixes the free edges of the anterior and posterior leaflets, so that the leaflets are well aligned at the end of contraction and regurgitation is reduced. However, the existing transapical mitral valve clipping devices may fail to lock the clip locking structure or become locked and cannot be used. Utility Model Content

[0005] The utility model aims to provide a valve clamping forceps to solve the problem that the locking structure fails or is locked and cannot be used.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provided is a valve clamp, comprising:

[0008] The transmission member comprises a guide rod and a hinge seat arranged at the distal end of the guide rod, wherein the guide rod is extended along a first direction and a first clamping portion is arranged on the guide rod along a second direction;

[0009] A locking sleeve, a sliding sleeve disposed on the guide rod;

[0010] A connecting arm, a first end of which is hinged to the hinge seat;

[0011] A first clamp arm, wherein the first clamp arm is provided with a first hinged portion and a second hinged portion, the first hinged portion is hinged to the locking sleeve, and the second hinged portion is hinged to the second end of the connecting arm;

[0012] The locking member is provided on the locking sleeve and is located on the side of the guide rod provided with the first clamping portion along the second direction. The locking member comprises an elastic body and a second clamping portion provided on the elastic body; wherein,

[0013] In the second direction, the elastic body has a natural state and a deformed state;

[0014] In a natural state, the first clamping portion is clamped with the second clamping portion;

[0015] In the deformed state, the first clamping portion is separated from the second clamping portion.

[0016] Optionally, the elastic body includes a first fan ring and a second fan ring arranged opposite to each other along a first direction, a second clamping portion is formed between the first end of the first fan ring and the first end of the second fan ring, the first fan ring is connected to the locking sleeve, and the second fan ring can be connected to the traction wire.

[0017] Optionally, there is an opening between the second end of the first sector ring and the second end of the second sector ring.

[0018] Optionally, the elastic body further includes a positioning portion, and the second end of the first sector ring extends inwardly to form the positioning portion, and the positioning portion is connected to the locking sleeve.

[0019] Optionally, the center of the positioning portion is arranged to coincide with the center of the elastic body.

[0020] Optionally, one of the positioning portion and the locking sleeve is provided with a positioning hole, and the other is provided with a positioning shaft, and the positioning shaft is inserted into the positioning hole.

[0021] Optionally, the second fan ring is provided with a traction portion, the traction portion is provided with a through hole along the third direction, a line connecting the center of the through hole and the center of the positioning portion is parallel to the first direction, and the traction wire is passed through the through hole.

[0022] Optionally, the second end of the second sector ring is arranged to protrude from the traction portion along the circumference of the elastic body.

[0023] Optionally, the second sector ring is provided with a traction portion, the traction portion is provided with a through hole along the third direction, and the traction wire is passed through the through hole;

[0024] The locking sleeve is provided with a limiting protrusion, and in a deformed state, the traction portion and the limiting protrusion are abutted against each other along a first direction.

[0025] Optionally, the first clamping portion is in a groove shape, including two first limiting surfaces set at an angle; the second clamping portion is in a convex shape, including two second limiting surfaces set at an angle; in a natural state, the first limiting surfaces and the second limiting surfaces are in one-to-one correspondence and fit together.

[0026] Beneficial effects:

[0027] The valve clamp provided by the utility model has the elastic body of the locking member in a deformed state, the first clamping part is separated from the second clamping part, the locking sleeve can slide relative to the guide rod, and drive the first clamping arm to rotate through the connecting arm to realize the opening and closing of the first clamping arm; the elastic body of the locking member is in a natural state, the first clamping part is clamped with the second clamping part to form a limit, so that the locking sleeve and the transmission member remain relatively fixed to lock the first clamping arm, which is stable and reliable, and effectively prevents the occurrence of locking failure. Among them, the elastic body expands or contracts along the second direction, so that the process of the second clamping part clamping with the first clamping part and the process of the second clamping part separating from the first clamping part are smooth and free of jamming, effectively preventing the first clamping part and the second clamping part from being locked and unable to be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the valve clamp provided by the utility model when the first clamp arm is closed;

[0029] Figure 2 It is a partial cross-sectional view of the valve clamp provided by the utility model when the first clamp arm is closed;

[0030] Figure 3 It is a cross-sectional view of the valve clamp provided by the utility model when the first clamp arm is opened;

[0031] Figure 4 It is a partial cross-sectional view of the valve clamp provided by the utility model when the first clamp arm is opened;

[0032] Figure 5 It is a structural schematic diagram of the valve clamp provided by the utility model;

[0033] Figure 6 This is a structural schematic diagram of a locking member provided by the utility model in a natural state with an elastic body from one perspective;

[0034] Figure 7 This is a structural schematic diagram of another viewing angle of the locking member of the elastic body provided by the utility model in a natural state;

[0035] Figure 8 It is a structural schematic diagram of the locking member provided by the utility model when the elastic body is in a deformed state;

[0036] Fig. 9 This is a structural schematic diagram of a locking sleeve provided by the utility model from one perspective;

[0037] Fig.10 This is a schematic structural diagram of the locking sleeve provided by the utility model from another viewing angle;

[0038] Fig.11 It is a partial cross-sectional view of the valve clamp provided by the utility model;

[0039] Fig.12 This is a structural schematic diagram of a transmission member provided by the utility model from one perspective;

[0040] Fig.13 This is a structural schematic diagram of the transmission member provided by the utility model from another perspective;

[0041] Fig.14 It is a cross-sectional view of the valve clamp provided by the utility model.

[0042] In the figure:

[0043] 100, transmission member; 110, guide rod; 111, first clamping portion; 1111, first limiting surface; 120, hinge seat;

[0044] 200, locking sleeve; 201, positioning hole; 210, limiting protrusion; 211, rounded corner;

[0045] 300, connecting arm; 310, first pin;

[0046] 400, first clamp arm; 410, second pin; 420, third pin;

[0047] 500, locking member; 501, opening; 510, elastic body; 511, first sector ring; 512, second sector ring; 520, second clamping portion; 521, second limiting surface; 530, positioning portion; 531, positioning shaft; 540, traction portion; 541, perforation;

[0048] 600, second clamping arm; 610, clamping portion;

[0049] 700. Traction wire. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0054] Reference Figures 1 to 4 As shown, this embodiment provides a valve clamp, which includes a transmission member 100 , a locking sleeve 200 , a connecting arm 300 , a first clamp arm 400 and a locking member 500 .

[0055] Specifically, the transmission member 100 includes a guide rod 110 and an articulated seat 120 disposed at the distal end of the guide rod 110, the guide rod 110 is extended along a first direction, and the guide rod 110 is provided with a first clamping portion 111 along a second direction; wherein, the direction a in the figure is the first direction, the direction b is the second direction, and the first direction and the second direction may be perpendicular to each other. In this embodiment, the distal end of the guide rod 110 refers to the end of the guide rod 110 that first extends into the human body during surgery, and the proximal end of the guide rod 110 refers to the opposite end of the distal end. In addition, the definitions of the proximal end and the distal end of other components in this embodiment are the same as those of the proximal end and the distal end of the guide rod 110, and this application will not elaborate on them.

[0056] Specifically, the locking sleeve 200 is slidably sleeved on the guide rod 110; the first end of the connecting arm 300 is hinged to the hinge seat 120; the first clamping arm 400 is provided with a first hinged portion (not shown) and a second hinged portion (not shown), the first hinged portion is hinged to the locking sleeve 200, and the second hinged portion is hinged to the second end of the connecting arm 300; the locking member 500 is provided on the locking sleeve 200 and is located at a side of the guide rod 110 along the second direction where the first clamping portion 111 is provided, and the locking member 500 includes an elastic body 510 and a second clamping portion 520 provided on the elastic body 510. The first hinged portion can be provided at the first end of the first clamping arm 400, the second hinged portion can be provided in the area between the first end and the second end of the first clamping arm 400, and the second end of the first clamping arm 400 is a free end.

[0057] In the second direction, the elastic body 510 has a natural state and a deformed state; in the natural state, the first clamping portion 111 is clamped with the second clamping portion 520; in the deformed state, the first clamping portion 111 is separated from the second clamping portion 520. It can be understood that in the process of the elastic body 510 being transformed from the natural state to the deformed state, the second clamping portion 520 gradually separates from the first clamping portion 111 along the second direction; in the process of the elastic body 510 being transformed from the natural state to the deformed state, the second clamping portion 520 gradually approaches the first clamping portion 111 along the second direction and is clamped therewith.

[0058] When the elastic body 510 of the locking member 500 is in a deformed state, the first clamping portion 111 is separated from the second clamping portion 520, and the locking sleeve 200 can slide relative to the guide rod 110, and drive the first clamping arm 400 to rotate through the connecting arm 300 to realize the opening and closing of the first clamping arm 400; when the elastic body 510 of the locking member 500 is in a natural state, the first clamping portion 111 is clamped with the second clamping portion 520 to form a limit, so that the locking sleeve 200 and the transmission member 100 remain relatively fixed to lock the first clamping arm 400, which is stable and reliable, and effectively prevents the occurrence of locking failure. Among them, the elastic body 510 expands or contracts along the second direction, so that the process of the second clamping portion 520 clamping with the first clamping portion 111 and the process of the second clamping portion 520 separating from the first clamping portion 111 are smooth and free of jamming, effectively preventing the first clamping portion 111 and the second clamping portion 520 from being locked and unable to be used. It is understandable that when the first clamping arm 400 is closed, the elastic body 510 of the locking member 500 is in a natural state, and the first clamping portion 111 is clamped with the second clamping portion 520 .

[0059] In the prior art, the locking structure used to lock the locking sleeve 200 and the transmission member 100 includes at least an elastic member and a clamping member. In this embodiment, a single locking member 500 can complete the locking of the locking sleeve 200 and the transmission member 100. The structure is simple, and the production and assembly efficiency is effectively improved. The overall weight of the valve clamp is reduced, which can reduce the burden on the heart.

[0060] Exemplarily, the material of the transmission component 100 may be a high-strength alloy material.

[0061] Exemplarily, the locking sleeve 200 may be made of a medical-grade metal material, such as a cobalt-chromium alloy.

[0062] In this embodiment, refer to Figure 3 and Figure 5 As shown, the valve clamping forceps also include a second clamp arm 600, and the second clamp arm 600 can clamp the valve leaflet with the first clamp arm 400. The material of the second clamp arm 600 can be an elastic material. The connecting arm 300 and the first clamp arm 400 are each provided with two and one-to-one corresponding arrangements, and the second clamp arm 600 includes two clamping parts 610 corresponding to the first clamp arm 400, and the clamping parts 610 and the corresponding first clamp arm 400 can clamp the valve leaflet. The second clamp arm 600 is in an unfolded state without being subjected to external force. In the unfolded state, the angle between the two clamping parts 610 maintains the maximum angle, and the second clamp arm 600 can be pulled toward the guide rod 110 by a pull line, that is, the angle of the two clamping parts 610 gradually decreases. Exemplarily, the second clamp arm 600 can be fixed on the locking sleeve 200.

[0063] Exemplarily, the first end of the connecting arm 300 may be hinged to the hinge seat 120 via a first pin 310 , and the first pin 310 may be welded to the connecting arm 300 .

[0064] For example, the first hinged portion and the locking sleeve 200 may be hingedly connected via a second pin 410 , and the second pin 410 may be welded to the first hinged portion of one of the first clamp arms 400 .

[0065] For example, the second hinged portion and the second end of the connecting arm 300 may be hinged via a third pin 420 , and the third pin 420 may be welded to the second hinged portion or the connecting arm 300 .

[0066] For example, the articulated seat 120 and the guide rod 110 may be integrally formed. The transmission member 100 may be T-shaped, and the connecting arm 300 is hinged to the corresponding end of the articulated seat 120 along the second direction.

[0067] Exemplarily, a side surface of the articulated seat 120 along the first direction facing away from the guide rod 110 may be in an arc shape so as to be suitable for in vivo transportation.

[0068] In this embodiment, the proximal end of the guide rod 110 and the proximal end of the locking sleeve 200 are both used to connect to the delivery system, and the delivery system can complete the operation in conjunction with the valve clamp. For example, the end of the guide rod 110 along the first direction facing away from the hinge seat 120 is provided with a threaded structure that can be connected to the delivery system, which is convenient for disassembly and assembly. Among them, the delivery system is a prior art, and this application will not go into too much detail.

[0069] In this embodiment, refer to Figures 6 to 8 As shown, the elastic body 510 includes a first fan ring 511 and a second fan ring 512 that are arranged opposite to each other along a first direction, a second clamping portion 520 is formed between the first end of the first fan ring 511 and the first end of the second fan ring 512, the first fan ring 511 is connected to the locking sleeve 200, and the second fan ring 512 can be connected to the traction wire 700. When the first clamping portion 111 and the second clamping portion 520 are unlocked, the first fan ring 511 and the second fan ring 512 are stretched along the first direction by pulling the traction wire 700, and then the first fan ring 511 and the second fan ring 512 are narrowed along the second direction, and the elastic body 510 is switched from the natural state to the deformed state, which is convenient for unlocking. The first fan ring 511 and the second fan ring 512 are stretched along the first direction. It can be understood that the curvature of the elastic body 510 in the second direction becomes smaller, that is, the fan ring portion of the elastic body 510 connected to the second clamping portion 520 is deformed and transformed toward a straight state. It is worth mentioning that in the deformed state, the fan ring portion connected to the second clamping portion 520 has not reached a straight state, and it still has a certain curvature, so that it does not require a large pulling force to switch the elastic body 510 from the natural state to the deformed state. The smaller unlocking pulling force can effectively prevent the damage of the first clamping portion 111 and the second clamping portion 520. Release the traction wire 700, the first fan ring 511 and the second fan ring 512 resume deformation, so that the elastic body 510 can switch from the deformed state to the natural state, which is convenient for operation.

[0070] Exemplarily, the locking member 500 may be made of a memory alloy.

[0071] In a feasible implementation, there is an opening 501 between the second end of the first fan ring 511 and the second end of the second fan ring 512, that is, the elastic body 510 can be set to an open ring structure. Among them, the opening 501 can be arranged relative to the second clamping portion 520 along the second direction. In this embodiment, the setting of the opening 501 is more suitable for the deformation of the first fan ring 511 and the second fan ring 512, effectively reducing the unlocking tension of the traction wire 700, and effectively preventing the first clamping portion 111 and the second clamping portion 520 from being locked and unable to be used. Exemplarily, the elastic body 510 can be set to an open ring structure of a polygonal open ring, an elliptical open ring or other shapes. Of course, the elastic body 510 may also be provided with no opening.

[0072] In a feasible embodiment, the elastic body 510 also includes a positioning portion 530, and the second end of the first fan ring 511 extends inwardly to form a positioning portion 530, and the positioning portion 530 is connected to the locking sleeve 200. Through the design of the positioning portion 530, the deformation trend of the first fan ring 511 and the second fan ring 512 when the elastic body 510 switches states is changed, and the orientation of the second clamping portion 520 is stabilized, so that the second clamping portion 520 is suitable for clamping or separating with the first clamping portion 111, effectively reducing the unlocking tension of the traction wire 700, and preventing the second clamping portion 520 from failing to complete the clamping with the first clamping portion 111 due to the change in orientation. Of course, the positioning portion 530 can also extend outwardly from the ring, or the second end of the first fan ring 511 can also be directly connected to the locking sleeve 200.

[0073] Exemplarily, the center of the positioning portion 530 is arranged to coincide with the center of the elastic body 510 to further stabilize the orientation of the second clamping portion 520. It is understandable that the elastic body 510 may be a vortex structure.

[0074] In this embodiment, refer to Figures 6 to 10 As shown, one of the positioning portion 530 and the locking sleeve 200 is provided with a positioning hole 201 , and the other is provided with a positioning shaft 531 , and the positioning shaft 531 is inserted into the positioning hole 201 to facilitate positioning and assembly.

[0075] Exemplarily, the positioning portion 530 is provided with a positioning shaft 531, and the locking sleeve 200 is provided with a positioning hole 201, so as to facilitate the molding and manufacturing of the two. Among them, the positioning shaft 531 can be fixed in the positioning hole 201 to stabilize the orientation of the second clamping portion 520. Exemplarily, the positioning shaft 531 can be fixed in the positioning hole 201 by welding, shape limiting, etc. Shape limiting, for example, sets the cross-section of the positioning shaft 531 and the positioning hole 201 to a polygonal shape.

[0076] In this embodiment, refer to Figures 6 to 11 As shown, the second fan ring 512 is provided with a traction part 540, and the traction part 540 is provided with a through hole 541 along the third direction, and the traction wire 700 is passed through the through hole 541 to facilitate the connection of the traction wire 700. Among them, the c direction in the figure is the third direction, and the first direction, the second direction and the third direction can be perpendicular to each other.

[0077] In a feasible implementation, the line connecting the center of the through hole 541 and the center of the positioning portion 530 is parallel to the first direction to stabilize the orientation of the second clamping portion 520. The traction wire 700 can pull the traction portion 540 along the second direction to further stabilize the orientation of the second clamping portion 520. Of course, the line connecting the center of the through hole 541 and the center of the positioning portion 530 can also be arranged at an angle to the first direction.

[0078] In a feasible implementation, the second end of the second fan ring 512 is arranged to protrude from the traction portion 540 along the circumference of the elastic body 510 to improve the stress distribution of the second fan ring 512 and stabilize the orientation of the second clamping portion 520 .

[0079] In a feasible embodiment, the locking sleeve 200 is provided with a limiting protrusion 210. In the deformed state, the traction portion 540 and the limiting protrusion 210 are abutted against each other along the first direction to form a limit to prevent the elastic body 510 from being over-stretched and permanently deformed, thereby ensuring the safe use of the valve clamp.

[0080] For example, the first end of the traction wire 700 can be located on the first side of the limiting protrusion 210 along the third direction, and the second end of the traction wire 700 can be located on the second side of the limiting protrusion 210 along the third direction, effectively preventing the traction wire 700 from being entangled and affecting the pulling of the traction part 540, and preventing the traction wire 700 from being squeezed and damaged by the limiting protrusion 210 and the traction part 540. Specifically, the limiting protrusion 210 is provided with rounded corners 211 on both side edges along the third direction on one side of the traction part 540 along the first direction, so as to prevent the traction wire 700 from being cut by the limiting protrusion 210.

[0081] In a feasible implementation, the elastic body 510 may also be semi-circular or V-shaped. Specifically, the first end of the elastic body 510 is connected to the locking sleeve 200, and the other end is provided with a second clamping portion 520. The middle area of ​​the elastic body 510 is connected to the traction wire 700. In order to achieve the expansion and contraction of the elastic body 510 along the second direction, a guide surface may be provided on the locking sleeve 200 to constrain the deformation of the elastic body 510. In the natural state, the first end and the second end of the elastic body 510 may be arranged relative to each other along the second direction. Of course, the elastic body 510 may also be other shapes and structures, which are not limited in this application.

[0082] In this embodiment, refer to Figures 6 to 8 , Figure 12 to Figure 14As shown, the first clamping portion 111 is in the shape of a groove, including two first limiting surfaces 1111 set at an angle; the second clamping portion 520 is in the shape of a protrusion, including two second limiting surfaces 521 set at an angle; in the natural state, the first limiting surface 1111 and the second limiting surface 521 are in one-to-one correspondence with each other to stably lock the first clamping arm 400 to prevent locking failure. In this embodiment, when the elastic body 510 switches from the natural state to the deformed state, because the first fan ring 511 and the second fan ring 512 are stretched along the first direction, the angle between the two first limiting surfaces 1111 will increase and squeeze the corresponding second limiting surface 521, so that the second clamping portion 520 can be more smoothly separated from the first clamping portion 111. Among them, the angle between the two first limiting surfaces 1111 can be 90°-150°, for example, 120° or 135°.

[0083] Exemplarily, in order to ensure that the first clamping portion 111 has good strength and is stably clamped with the second clamping portion 520 , the cross section of the guide rod 110 is set to be rectangular.

[0084] Illustratively, a plurality of first clamping portions 111 may be provided along the first direction, so that the first clamping arm 400 has a plurality of closed positions, thereby enabling the valve clamping forceps to clamp and fix leaflets of different thicknesses, thereby improving applicability.

[0085] Exemplarily, the steps for using the valve clamp provided in this embodiment are as follows:

[0086] S100, delivering the valve clamp into the heart;

[0087] Before transportation, the first clamping arm 400 is closed and the second clamping arm 600 is in a retracted state under the pulling of the pull line.

[0088] S200, passing the two first clamp arms 400 through the two leaflets of the mitral valve, pulling the traction wire 700 to separate the second clamping portion 520 from the first clamping portion 111, and sliding the guide rod 110 distally relative to the locking sleeve 200 to open the first clamp arms 400;

[0089] The sliding of the guide rod 110 is accomplished through a conveying system.

[0090] S300, withdrawing the valve clamping forceps so that the two first clamping arms 400 support the two valve leaflets in a one-to-one correspondence;

[0091] S400, releasing the pull line to unfold the second clamping arm 600, so that the clamping portion 610 and the corresponding first clamping arm 400 clamp the corresponding leaflet;

[0092] S500, slide the guide rod 110 proximally relative to the locking sleeve 200 to close the first clamp arm 400. Under the pressure of the first clamp arm 400, the second clamp arm 600 is retracted, and the two leaflets are brought closer to each other, thereby reducing mitral regurgitation.

[0093] In step 500 , the elastic body 510 of the locking member 500 may remain in the deformed state until the two leaflets are brought close to each other to a suitable position, and then the traction wire 700 is released to allow the second clamping portion 520 to be clamped with the first clamping portion 111 , thereby locking the first clamp arm 400 .

[0094] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A valve clamp, characterized in that: include: The transmission member (100) comprises a guide rod (110) and a hinge seat (120) arranged at the distal end of the guide rod (110), wherein the guide rod (110) is extended along a first direction, and the guide rod (110) is provided with a first clamping portion (111) along a second direction; A locking sleeve (200) is slidably mounted on the guide rod (110); A connecting arm (300), wherein a first end of the connecting arm (300) is hingedly connected to the hinge seat (120); A first clamp arm (400), wherein the first clamp arm (400) is provided with a first hinged portion and a second hinged portion, wherein the first hinged portion is hingedly connected to the locking sleeve (200), and the second hinged portion is hingedly connected to the second end of the connecting arm (300); The locking member (500) is provided on the locking sleeve (200) and is located on a side of the guide rod (110) provided with the first clamping portion (111) along the second direction. The locking member (500) comprises an elastic body (510) and a second clamping portion (520) provided on the elastic body (510); wherein: In the second direction, the elastic body (510) has a natural state and a deformed state; In a natural state, the first clamping portion (111) is clamped with the second clamping portion (520); In the deformed state, the first clamping portion (111) is separated from the second clamping portion (520).

2. The valve clamp according to claim 1, characterized in that: The elastic body (510) includes a first fan ring (511) and a second fan ring (512) which are arranged opposite to each other along a first direction, and a second clamping portion (520) is formed between the first end of the first fan ring (511) and the first end of the second fan ring (512), the first fan ring (511) is connected to the locking sleeve (200), and the second fan ring (512) can be connected to the traction wire (700).

3. The valve clamp according to claim 2, characterized in that: An opening (501) is provided between the second end of the first sector ring (511) and the second end of the second sector ring (512).

4. The valve clamp according to claim 2, characterized in that: The elastic body (510) further comprises a positioning portion (530), and the second end of the first sector ring (511) extends inwardly of the ring to form the positioning portion (530), and the positioning portion (530) is connected to the locking sleeve (200).

5. The valve clamp according to claim 4, characterized in that: The center of the positioning portion (530) is arranged to coincide with the center of the elastic body (510).

6. The valve clipping forceps according to claim 4, characterized in that: One of the positioning portion (530) and the locking sleeve (200) is provided with a positioning hole (201), and the other is provided with a positioning shaft (531), and the positioning shaft (531) is inserted into the positioning hole (201).

7. The valve clipping forceps according to claim 4, characterized in that: The second fan ring (512) is provided with a traction portion (540), and the traction portion (540) is provided with a through hole (541) along the third direction, and a line connecting the center of the through hole (541) and the center of the positioning portion (530) is parallel to the first direction, and the traction wire (700) is passed through the through hole (541).

8. The valve clamp according to claim 7, characterized in that: The second end of the second sector ring (512) is arranged to protrude from the traction portion (540) along the circumferential direction of the elastic body (510).

9. The valve clipping forceps according to claim 2, characterized in that: The second sector ring (512) is provided with a traction portion (540), the traction portion (540) is provided with a through hole (541) along the third direction, and the traction wire (700) is passed through the through hole (541); The locking sleeve (200) is provided with a limiting protrusion (210), and in a deformed state, the traction portion (540) and the limiting protrusion (210) are abutted against each other along a first direction.

10. The valve clipping forceps according to claim 1, characterized in that: The first clamping portion (111) is in a groove shape, and includes two first limiting surfaces (1111) arranged at an angle; the second clamping portion (520) is in a convex shape, and includes two second limiting surfaces (521) arranged at an angle; in a natural state, the first limiting surfaces (1111) and the second limiting surfaces (521) are in one-to-one correspondence and fit with each other.

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