CN115844594B

CN115844594B - Clamping apparatus

Info

Publication number: CN115844594B
Application number: CN202310122341.5A
Authority: CN
Inventors: 潘炳跃; 戴宇峰
Original assignee: Guangdong Hanyu Medical Technology Co ltd
Current assignee: Guangdong Hanyu Medical Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-05-05
Anticipated expiration: 2043-02-16
Also published as: CN115844594A

Abstract

Embodiments of the present application provide a clamping instrument. The clamping apparatus comprises: push rod, at least two clamping structures, elastic arm and regulating part, at least two clamping structures set up on the push rod, and every clamping structure all includes first arm lock and second arm lock, and the elastic arm sets up in the second arm lock outside, and the elastic arm has elasticity, and the regulating part sets up in second arm lock department and links to each other with the elastic arm, but along the extending direction relative movement of second arm lock between regulating part and the second arm lock to drive the elastic arm and take place elastic deformation, in order to change the arm width of elastic arm in the extending direction of perpendicular to second arm lock. According to the embodiment of the application, the double clamping rate in valve regurgitation treatment can be reduced, and the operation risk and operation cost are reduced.

Description

Clamping apparatus

Technical Field

The application relates to the technical field of interventional medical devices, in particular to a clamping device.

Background

Heart valves refer to valves between the atria and ventricles or between the ventricles and arteries, and the common incidences of valve insufficiency, such as mitral valve, tricuspid valve, aortic valve, pulmonary valve, etc. Taking the mitral valve as an example, a valve located between the left ventricle and the left atrium is called a mitral valve. In the case of a diseased mitral valve, there is a problem that mitral regurgitation is liable to occur, that is, when the left ventricle contracts, the mitral valve is hard to close, resulting in regurgitation of blood from the left ventricle into the left atrium. Mitral regurgitation can be a serious threat to the patient's life health.

Currently, the primary means of inhibiting regurgitation of valves (e.g., mitral valve, tricuspid valve, etc.) include the manner in which clamping devices are implanted through a minimally invasive path. In the related art, in order to eliminate regurgitation and avoid valve stenosis, the valve needs to be adjusted to a proper coaptation area, and two or more clamping instruments are generally required to be implanted, so that the double clamping rate in valve regurgitation treatment is higher (more than 40%), the operation risk is higher, and the operation cost is higher.

Disclosure of Invention

The application provides a clamping instrument aiming at the defects of the existing mode, and aims to solve the technical problems of higher double clamping rate, higher operation risk and higher operation cost in valve reflux treatment in the related technology.

In a first aspect, embodiments of the present application provide a clamping instrument comprising:

a push rod;

the clamping structures are arranged on the pushing rod, and each clamping structure comprises a first clamping arm and a second clamping arm;

the elastic arm is arranged outside the second clamping arm and has elasticity;

the adjusting piece is arranged at the second clamping arm and is connected with the elastic arm; the adjusting piece and the second clamping arm can move relatively along the extending direction of the second clamping arm and drive the elastic arm to elastically deform so as to change the arm width of the elastic arm in the extending direction perpendicular to the second clamping arm.

In one possible implementation, the adjusting member includes: a moving block and an adjusting rod fixed on the moving block;

the moving block and the second clamping arm can move relatively along the extending direction of the second clamping arm, and the elastic arm penetrates through the first through hole at the tail end of the adjusting rod.

In one possible implementation manner, the elastic arm comprises a mounting part and an arc-shaped deformation part, and the tail end of the adjusting rod is sleeved on the deformation part;

the second clamping arm is provided with a fixing piece, the fixing piece is provided with a second through hole, and the mounting part is movably arranged in the second through hole.

In one possible implementation manner, the second clamping arm is provided with a rod-shaped sliding rail, and the moving block is sleeved outside the sliding rail.

In one possible implementation, the moving block and the sliding rail have a first coefficient of friction therebetween to limit relative movement between the moving block and the sliding rail.

In one possible implementation manner, the device further comprises a driving piece, wherein the driving piece comprises a first pull wire, and the first pull wire is folded in half to form a first rope sleeve part and two first connecting parts;

the push rod is sleeved on the first connecting portion and exposes the end portion of the first connecting portion, a first mounting ring is arranged on one side, away from the first clamping arm, of the adjusting piece, and the first rope sleeve portion is sleeved in the first mounting ring.

In one possible implementation manner, the driving piece further comprises a second pull wire, and the second pull wire is folded in half to form a second rope sleeve part and two second connecting parts;

the adjusting piece is close to one side of the first clamping arm and is provided with a second installation ring, and the second rope sleeve part is sleeved in the second installation ring.

In one possible implementation manner, the push rod further comprises a locking structure, the locking structure is sleeved on the push rod, and the clamping structure is arranged on the locking structure.

In one possible implementation, the elastic arms are made of a memory alloy.

In one possible implementation, the spring arms are made of nickel titanium alloy.

The beneficial technical effects that technical scheme that this application embodiment provided brought include:

in the clamping instrument provided by the application, because the elastic arm is arranged outside the second clamping arm, the elastic arm has elasticity, the adjusting piece is arranged at the second clamping arm and is connected with the elastic arm, and the adjusting piece and the second clamping arm can relatively move along the extending direction of the second clamping arm and drive the elastic arm to elastically deform so as to change the arm width of the elastic arm in the extending direction perpendicular to the second clamping arm. By implanting the clamping device, different valve leaflets of the valve are respectively clamped by utilizing the clamping structures of the clamping device, and the arm width of the elastic arm is adjusted by utilizing the adjusting piece, so that the involution area between the different valve leaflets is changed, valve stenosis caused by overlarge arm width of the clamping device and overlarge involution area between the different valve leaflets can be avoided, and residual reflux phenomenon caused by overlarge arm width of the clamping device and overlarge involution area between the different valve leaflets can be avoided. That is, through implanting the clamping instrument that this application provided, utilize the regulating part to adjust the arm width of elastic arm, can adjust the valve to suitable involution area, need not to finely adjust the involution area of valve through implanting two or more clamping instruments in succession, can reduce the double-clamping rate in the valve reflux treatment, reduce operation risk and operation cost.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an exploded view of a clamping instrument provided in an embodiment of the present application;

FIG. 2 is a schematic perspective view of a clamping apparatus according to an embodiment of the present application in an open state;

FIG. 3 is a schematic perspective view of a clamping instrument according to an embodiment of the present application in a closed state;

FIG. 4 is an elevation view of a clamping instrument provided in an embodiment of the present application in an open state;

FIG. 5 is a schematic perspective view of an adjusting member and a driving member of a clamping apparatus according to an embodiment of the present application;

FIG. 6 is a schematic perspective view of an elastic arm of a clamping device according to an embodiment of the present application;

FIG. 7 is a front view of a resilient arm of a clamping instrument provided in an embodiment of the present application with an unadjusted arm width;

FIG. 8 is a side view of a resilient arm of a clamping instrument provided in an embodiment of the present application with an unadjusted arm width;

FIG. 9 is a front view of a gripping instrument provided in accordance with an embodiment of the present application with an adjustable arm width of the resilient arm;

FIG. 10 is a side view of a gripping instrument provided in accordance with an embodiment of the present application with an adjustable arm width of the resilient arm;

FIG. 11 is a schematic view of a clamping apparatus provided in an embodiment of the present application implanted in a valve with a smaller arm width of the elastic arms;

fig. 12 is a schematic view of a clamping apparatus according to an embodiment of the present application implanted in a valve and in a state in which the arm width of the elastic arm is large.

Reference numerals:

100-clamping the instrument;

11-pushing rod;

12-a sandwich structure;

121-a first clamping arm; 122-a second clamping arm;

13-an elastic arm;

131-an installation part; 132—deformation;

14-an adjusting member;

141-a moving block;

142-adjusting the rod;

142 a-a first through hole;

143-a first mounting ring;

144-a second mounting ring;

15-fixing pieces;

151-a second through hole;

16-slide rails;

17-a driving member;

171-a first pull wire;

171 a-a first rope sling portion; 171 b-a first connection;

172-a second pull wire;

172 a-a second rope sling portion; 172 b-a second connection;

18-locking structure;

19-connecting rod.

Detailed Description

Embodiments of the present application are described below with reference to the drawings in the present application. It should be understood that the embodiments described below with reference to the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and the technical solutions of the embodiments of the present application are not limited.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, etc. that may be implemented as desired in the art. The term "and/or" as used herein refers to at least one of the items defined by the term, e.g., "a and/or B" may be implemented as "a", or as "B", or as "a and B".

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, in order to eliminate regurgitation, a clamping instrument is implanted to appose the leaflets at the regurgitation (edge-to-edge suturing technique) to reduce regurgitation gaps between the different leaflets. However, when the width of the implanted arms is too large or too many implanted clamping devices, the coaptation area between the different leaflets is too large, which can easily lead to valve stenosis, resulting in a great life hazard. Therefore, the clamping device with larger arm width is usually implanted first, and if the residual reflux condition of the valve still exists, the clamping device with smaller arm width is supplemented to further increase the involution area between different valve leaflets, reduce the reflux gap between different valve leaflets and eliminate the reflux condition.

That is, to adjust the valve to the proper coaptation area, eliminating regurgitation while avoiding the problem of valve stenosis, two different arm-wide clamping instruments often need to be implanted sequentially, resulting in a higher double-clamping rate in valve regurgitation treatment, increasing the surgical risk and surgical costs.

The application provides a clamping instrument aims at solving the technical problem in the prior art.

The clamping device of the embodiment can be used as an edge-to-edge repair implant in the structural heart disease interventional treatment field, and can realize repair treatment of heart valve leaflets (such as mitral valve, tricuspid valve, aortic valve, pulmonary valve and the like) by reaching a designated anatomical position through a vascular minimally invasive approach or through the apex of the heart.

The technical scheme of the present application is described in detail below with specific examples. It should be noted that the following embodiments may be referred to, or combined with each other, and the description will not be repeated for the same terms, similar features, similar implementation steps, and the like in different embodiments.

As shown in fig. 1-10, embodiments of the present application provide a clamping instrument 100 comprising: push rod 11, at least two clamping structures 12, elastic arms 13 and adjusting members 14.

At least two clamping structures 12 are arranged on the push rod 11, each clamping structure 12 comprising a first clamping arm 121 and a second clamping arm 122.

The elastic arm 13 is disposed outside the second clamping arm 122, and the elastic arm 13 has elasticity.

The adjusting member 14 is disposed at the second clamping arm 122 and is connected to the elastic arm 13. The adjusting member 14 and the second clamping arm 122 are relatively movable along the extending direction of the second clamping arm 122, and drives the elastic arm 13 to elastically deform, so as to change the arm width of the elastic arm 13 in the extending direction perpendicular to the second clamping arm 122.

Specifically, the elastic arm 13 is disposed in a second plane (i.e., a first plane) perpendicular to the plane in which the push rod 11 and the second clamp arm 122 lie. That is, the pushing rod 11, the first clamping arm 121 and the second clamping arm 122 are disposed on a first plane, the first clamping arm 121 and the second clamping arm 122 move in the first plane to open and close the clamping structure 12, the elastic arm 13 can elastically deform in a second plane, and the second plane can be perpendicular to the first plane.

By implanting the above-mentioned clamping apparatus 100, the different leaflets of the valve are respectively clamped by using the clamping structures 12 of the above-mentioned clamping apparatus 100, and the arm width of the elastic arm 13 is adjusted by using the adjusting member 14, so as to change the coaptation area between different leaflets, which can avoid the valve stenosis caused by too large arm width of the clamping apparatus 100 and too large coaptation area between different leaflets, and can also avoid the residual regurgitation phenomenon caused by too small arm width of the clamping apparatus 100 and too small coaptation area between different leaflets. That is, by implanting the clamping apparatus 100 provided in the present application, the valve can be adjusted to a suitable coaptation area by adjusting the arm width of the elastic arm 13 by using the adjusting member 14, and the coaptation area of the valve does not need to be finely adjusted by implanting two or more clamping apparatuses 100 in sequence, so that the double clamping rate in the valve regurgitation treatment can be reduced, and the operation risk and the operation cost can be reduced.

The extending direction of the second clamping arm 122 is the length direction of the second clamping arm 122, and the arm width of the elastic arm 13 is the dimension of the elastic arm 13 in the width direction of the second clamping arm 122, and the width direction of the second clamping arm 122 is perpendicular to the length direction of the second clamping arm 122.

In other words, according to the clamping apparatus 100 provided in the present application, the width adjusting portion of the second clamping arm 122 is formed by the elastic arm 13, and the area of the involution area can be adjusted according to the reflux effect under the adjusting action of the adjusting member 14, so that two clamping apparatuses 100 do not need to be implanted in sequence.

In this embodiment, the adjusting member 14 may include: a moving block 141, and an adjusting lever 142 fixed to the moving block 141. The moving block 141 and the second clamping arm 122 can relatively move along the extending direction of the second clamping arm 122, and the elastic arm 13 is arranged in the first through hole 142a at the tail end of the adjusting rod 142 in a penetrating manner.

Specifically, the moving block 141 may be located in an accommodating space enclosed by the second clamping arm 122, and the adjusting rod 142 is disposed along the second clamping arm 122 in the first plane in a penetrating manner.

In the process that the moving block 141 moves along the extending direction of the second clamping arm 122 relative to the second clamping arm 122, the moving block 141 drives the adjusting rod 142 to move along the extending direction of the second clamping arm 122, and as the distance between the first through hole 142a at the tail end of the adjusting rod 142 and the second clamping arm 122 is unchanged, the adjusting rod 142 drives the elastic arm 13 to elastically deform, so that the arm width of the elastic arm 13 in the extending direction perpendicular to the second clamping arm 122 is changed.

Here, the length direction of the adjustment lever 142 may be perpendicular to the extending direction of the second clip arm 122, that is, the adjustment lever 142 is disposed along the arm width direction of the elastic arm 13.

In practical application, the elastic arm 13 may include a mounting portion 131 and an arc-shaped deformation portion 132, and the end of the adjusting rod 142 is sleeved on the deformation portion 132. The second clamping arm 122 is provided with a fixing member 15, the fixing member 15 is provided with a second through hole 151, and the mounting portion 131 is movably disposed in the second through hole 151.

When the arm width of the deformation portion 132 (i.e., the arm width of the elastic arm 13) becomes smaller, the mounting portion 131 moves in a direction away from the deformation portion 132. When the arm width of the deformation portion 132 becomes large, the mounting portion 131 moves in a direction approaching the deformation portion 132.

The deformation portion 132 may have a semicircular shape, a semi-elliptical shape, a quarter-circular shape, a quarter-elliptical shape, a polygonal shape, or the like. As long as it is ensured that the distances between the respective portions of the deformation portion 132 and the second clamp arm 122 are different in the extending direction perpendicular to the second clamp arm 122, the arm width of the deformation portion 132 can be changed by the regulating member 14 during the movement of the moving block 141.

Specifically, the movement between the moving block 141 and the second clamping arm 122 includes various movement modes such as sliding, gear transmission, or screw transmission. Sliding is taken as an example below.

In the present embodiment, the second clamping arm 122 is provided with a rod-shaped sliding rail 16, and the moving block 141 is sleeved outside the sliding rail 16. For example, the moving block 141 may be ring-shaped.

So set up, the movable block 141 can be firm to set up on the slide rail, and the movable block 141 can slide for slide rail 16, avoids the movable block 141 to drop from slide rail 16.

In another possible embodiment, the moving block 141 may include a main body portion and bending portions disposed on two sides of the main body portion, wherein the main body portion is disposed on one side of the sliding rail 16, and the bending portions extend to the other side of the sliding rail 16. In other words, the bending portion wraps the side surface of the sliding rail 16 and extends to the side of the sliding rail 16 away from the main body portion.

So set up, can utilize the elasticity of movable block 141 self to directly block the movable block 141 to slide rail 16 when the installation, the installation of being convenient for.

Specifically, the first friction coefficient is between the moving block 141 and the sliding rail 16 to limit the relative movement between the moving block 141 and the sliding rail 16.

In practical applications, the difficulty of the relative movement between the moving block 141 and the sliding rail 16 (i.e. the acting force required by the relative movement between the moving block 141 and the sliding rail 16) can be changed by changing the gap between the moving block 141 and the sliding rail 16, the materials of the moving block 141 and the sliding rail 16, and the relative rest between the moving block 141 and the sliding rail 16 can be ensured after the acting force is removed.

Referring to fig. 4, in the present embodiment, the clamping device 100 may further include a driving member 17, and the driving member 17 may include a first wire 171, and the first wire 171 may be folded in half to form a first string cover portion 171a and two first connection portions 171b.

The push rod 11 is sleeved on the first connecting portion 171b and exposes an end portion of the first connecting portion 171b, a first mounting ring 143 is disposed on a side of the adjusting member 14 away from the first clamping arm 121, and the first rope sleeve portion 171a is sleeved in the first mounting ring 143.

That is, the first mounting ring 143 is disposed on the side of the moving block 141 remote from the first clamp arm 121. The first pull wire 171 is sleeved on the first mounting ring 143 of the adjusting member 14 after passing through the push rod 11, so as to form a rope sleeve structure.

By pulling the first wire 171 outside the body, the regulator 14 can be driven to move in the extending direction of the second clamp arm 122 to open the second clamp arm 122. Also, the first wire 171 can be withdrawn after the arm width of the elastic arms 13 is adjusted to an appropriate position, avoiding adverse effects of the first wire 171 in the body.

With continued reference to fig. 4, further, the driving member 17 may further include a second pull wire 172, where the second pull wire 172 is folded in half to form a second rope hitch portion 172a and two second connection portions 172b.

The adjusting member 14 is provided with a second mounting ring 144 near the first clamping arm 121, and the second rope sleeve portion 172a is sleeved in the second mounting ring 144.

That is, the second mounting ring 144 is disposed on the side of the moving block 141 near the first clamping arm 121. The second pull wire 172 is sleeved on the second mounting ring 144 of the moving block 141 to form a rope sleeve structure.

By pulling the second pull wire 172 outside the body, the adjusting member 14 can be driven to move along the extending direction of the second clamping arm 122, so as to close the second clamping arm 122. And, the second pull wire 172 can be pulled out after the arm width of the elastic arm 13 is adjusted to a proper position, so that adverse effects of the second pull wire 172 in the body are avoided.

Referring to fig. 7 and 8, fig. 7 is a front view of the clamping device 100 with the arm width of the elastic arm 13 not adjusted, and fig. 8 is a side view of the clamping device 100 with the arm width of the elastic arm 13 not adjusted. It is understood that when the arm width of the elastic arm 13 of the clamping device 100 is not adjusted, the adjusting member 14 does not apply a force to the elastic arm 13, and at this time, the arm width of the elastic arm 13 is maximized.

Referring to fig. 9 and 10, fig. 9 is a front view of the clamping device 100 with the arm width of the elastic arm 13 adjusted, and fig. 10 is a side view of the clamping device 100 with the arm width of the elastic arm 13 adjusted. It is understood that when the arm width of the elastic arm 13 of the clamping device 100 is adjusted, the adjusting member 14 applies a force to the elastic arm 13, and the arm width of the elastic arm 13 becomes smaller.

Referring to fig. 11 and 12, fig. 11 is a schematic view of the clamping apparatus 100 implanted in a valve with the arm width of the elastic arm 13 being small (the arm width of the elastic arm 13 is adjusted as in fig. 9 and 10), and fig. 12 is a schematic view of the clamping apparatus 100 implanted in a valve with the arm width of the elastic arm 13 being large (the arm width of the elastic arm 13 is not adjusted as in fig. 7 and 8).

In fig. 11 and 12, d is the arm width of the elastic arm 13. It is understood that the larger the arm width of the elastic arm 13, the smaller the regurgitation gap between the leaflets sandwiched in the respective sandwiching structures 12, the greater the risk of valve stenosis, but the better the regurgitation reducing effect.

In practical applications, the clamping apparatus 100 may further include a locking structure 18, where the locking structure 18 is sleeved on the pushing rod 11, and the clamping structure 12 is disposed on the locking structure 18.

The clamping structures 12 of the clamping apparatus 100 respectively clamp different leaflets of the valve, and when the locking structure 18 is in the locked state, the clamping structures 12 are relatively closed together, so that the regurgitation gap between the leaflets clamped in the clamping structures 12 is reduced, thereby achieving the purpose of reducing regurgitation.

In this embodiment, the elastic arm 13 may be made of a memory alloy. For example, the spring arm 13 may be made of nickel-titanium alloy. The memory alloy is a special alloy capable of automatically recovering plastic deformation of the memory alloy to an original shape at a certain specific temperature, and has good plasticity. The memory alloy has unique shape memory function, and also has excellent wear resistance, corrosion resistance, high damping, superelasticity and other features.

In practical applications, the clamping apparatus 100 may further include at least two connecting rods 19, where the connecting rods 19 are disposed in one-to-one correspondence with the second clamping arms 122, and one end of each connecting rod 19 is hinged to the pushing rod 11, and the other end is hinged to the corresponding second clamping arm 122, so as to drive the opening or closing of the clamping structure 12 during the pushing and pulling process of the pushing rod 11.

Optionally, the exterior of the clamping instrument 100 is coated with a PET Film (Polyester Film) to aid in endothelialization of the clamping instrument 100.

The above embodiments provide a gripping device 100 with resilient arms 13 that are superelastic and can be compressed into the catheter of the delivery system for delivery. After the catheter is delivered, the memory configuration (e.g., the arcuate configuration) is restored. The adjusting member 14 can be driven by the driving member 17 to move (e.g. slide) relatively along the extending direction of the second clamping arm 122, so as to change the outer shape of the elastic arm 13, thereby adjusting the arm width of the elastic arm 13.

After valve (e.g., mitral valve) clamping is performed with the clamping apparatus 100 in embodiments of the present application, the size of the coaptation area (i.e., the coaptation area) depends on the arm width of the elastic arms 13 of the clamping apparatus 100 (i.e., the arm width of the clamping apparatus 100). Reflux effect was assessed by three-dimensional ultrasound and/or DSA. If there is residual regurgitation or stenosis, the device 100 may be opened at a small angle, the driving member 17 of the device 100 may be driven extracorporeally, and the arm width of the flexible arms 13 of the device 100 may be adjusted to increase or decrease the arm width of the device 100 to increase or decrease the coaptation area of the valve.

Specifically, after valve (e.g., mitral valve) clamping is performed, the regurgitation effect can be evaluated ultrasonically, adjusting the coaptation area of the clamping instrument 100. When there is residual regurgitation, the width of the arms of the clamping instrument 100 can be increased by the adjustment member 14 to increase the coaptation area between the leaflets to eliminate regurgitation. When the pressure difference across the valve is too large, i.e. the clamping apparatus 100 causes valve stenosis, the arm width of the clamping apparatus 100 is reduced by the adjusting member 14, the coaptation area between the leaflets is reduced, and the valve stenosis is eliminated.

After the clamping device 100 with adjustable arm width is implanted, the arm width of the elastic arm 13 of the clamping device 100 is adjusted according to the reflux effect, so that the involution area is adjusted, reflux is eliminated, valve (for example, mitral valve) stenosis is avoided, the problem of incorrect evaluation of the involution area in the clinical (for example, mitral valve) clamping process can be eliminated, the double clamping rate can be greatly reduced, and the clinical value is very high.

in the clamping apparatus 100 provided in the application, since the elastic arm 13 is disposed outside the second clamping arm 122, the elastic arm 13 has elasticity, the adjusting member 14 is disposed at the second clamping arm 122 and is connected to the elastic arm 13, and the adjusting member 14 and the second clamping arm 122 can relatively move along the extending direction of the second clamping arm 122 and drive the elastic arm 13 to elastically deform, so as to change the arm width of the elastic arm 13 in the extending direction perpendicular to the second clamping arm 122. By implanting the above-mentioned clamping apparatus 100, the different leaflets of the valve are respectively clamped by using the clamping structures 12 of the above-mentioned clamping apparatus 100, and the arm width of the elastic arm 13 is adjusted by using the adjusting member 14, so as to change the coaptation area between different leaflets, which can avoid the valve stenosis caused by too large arm width of the clamping apparatus 100 and too large coaptation area between different leaflets, and can also avoid the residual regurgitation phenomenon caused by too small arm width of the clamping apparatus 100 and too small coaptation area between different leaflets. That is, by implanting the clamping apparatus 100 provided in the present application, the valve can be adjusted to a suitable coaptation area by adjusting the arm width of the elastic arm 13 by using the adjusting member 14, and the coaptation area of the valve does not need to be finely adjusted by implanting two or more clamping apparatuses 100 in sequence, so that the double clamping rate in the valve regurgitation treatment can be reduced, and the operation risk and the operation cost can be reduced.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, actions, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed in this application may be alternated, altered, rearranged, split, combined, or eliminated. Further, steps, measures, schemes in the related art having various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the exemplary directions or positional relationships shown in the drawings, are for convenience of description or simplifying the description of the embodiments of the present application, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the order in which the steps are performed is not limited to the order indicated by the arrows. In some implementations of embodiments of the present application, the steps in each flow may be performed in other orders as desired, unless explicitly stated herein. Moreover, some or all of the steps in the flowcharts may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of the sub-steps or stages may be executed at the same time, or may be executed at different times, where the execution sequence of the sub-steps or stages may be flexibly configured according to the requirements, which is not limited by the embodiment of the present application.

The foregoing is only a part of the embodiments of the present application, and it should be noted that, for those skilled in the art, other similar implementation means based on the technical ideas of the present application are adopted without departing from the technical ideas of the solutions of the present application, and also belong to the protection scope of the embodiments of the present application.

Claims

1. A clamping instrument, comprising:

a push rod;

the elastic arm is arranged outside the second clamping arm and has elasticity;

the adjusting piece is arranged at the second clamping arm and is connected with the elastic arm; the adjusting member includes: a moving block and an adjusting rod fixed on the moving block; the elastic arm is arranged in the first through hole at the tail end of the adjusting rod in a penetrating mode; the moving block and the second clamping arm can relatively move along the extending direction of the second clamping arm, so that the adjusting rod drives the elastic arm to elastically deform, and the arm width of the elastic arm in the extending direction perpendicular to the second clamping arm is changed;

the driving piece comprises a first pull wire and a second pull wire, the first pull wire is folded in half to form a first rope sleeve part and two first connecting parts, and the second pull wire is folded in half to form a second rope sleeve part and two second connecting parts; the pushing rod is sleeved on the first connecting part and exposes the end part of the first connecting part, a first mounting ring is arranged on one side, away from the first clamping arm, of the adjusting piece, and the first rope sleeve part is sleeved in the first mounting ring; the adjusting piece is close to one side of the first clamping arm and is provided with a second installation ring, and the second rope sleeve part is sleeved in the second installation ring.

2. The clamping instrument according to claim 1, wherein the elastic arm comprises a mounting portion and an arc-shaped deformation portion, and the tail end of the adjusting rod is sleeved on the deformation portion;

3. The clamping apparatus according to claim 1, wherein the second clamping arm is provided with a rod-shaped sliding rail, and the moving block is sleeved outside the sliding rail.

4. A gripping apparatus according to claim 3 characterised in that the moving mass and the slide have a first coefficient of friction therebetween to limit relative movement between the moving mass and the slide.

5. The clamping instrument of claim 1, further comprising a locking structure that is sleeved on the push rod, the clamping structure being disposed on the locking structure.

6. The clamping instrument of claim 1, wherein the resilient arms are made of a memory alloy.

7. The clamping instrument of claim 6, wherein the resilient arms are fabricated from a nickel titanium alloy.