CN219983142U - Valve leaf fishing device - Google Patents

Abstract

The utility model discloses a valve leaf catching device, which comprises a spiral wire body, wherein the wire body comprises a far-end coil, a middle coil and a near-end coil which are sequentially arranged, the far-end coil is arranged at the far end of the wire body, the near-end coil is arranged at the near end of the wire body, the spiral inner diameter of the near-end coil and the spiral inner diameter of the far-end coil are both larger than the spiral inner diameter of the middle coil, the near-end coil is at least arranged into two circles, the spiral inner diameter of the near-end coil gradually increases from a heart valve leaf to an atrium, the near-end coil is tightly attached to the inner wall of the atrium, the near-end coil can be effectively fixed in the atrium, the middle coil can be ensured to be positioned at the valve root position of the heart valve leaf, and therefore, the tendon cable is prevented from being clamped between the valve leaf catching device and the valve, and the problem of tendon cable breakage is further solved.

Description

Valve leaf fishing device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a valve leaf catching device.

Background

Mitral valve pathology is a common heart valve disease, and mitral valve pathology patients are also the largest population of heart valve surgery, accounting for about 60%, and mitral valve intervention provides a good treatment scheme, including transcatheter mitral valve repair and transcatheter mitral valve replacement. Among them, transcatheter mitral valve replacement is the current mainstream development direction, and is currently being developed in various countries, the transcatheter mitral valve replacement needs to have soft texture of the mitral valve leaves, and with the continuous change of cardiac cycle and illness state, the mitral valve leaves cannot provide radial supporting force for the valve stent, so that the problem is usually solved by adopting the annulus valve technology.

The current technology of the valve in the annulus needs to arrange the valve leaf catching device at a proper position around the mitral valve leaf before the implantation of the prosthetic valve, so as to provide a certain supporting force for the mitral valve leaf, and further provide radial supporting force for the prosthetic valve which is subsequently implanted, the structure of the existing valve leaf catching device is similar to a spring, the overall stability of the structure is poor, the valve leaf catching device is easy to deviate from the root of the heart valve leaf under the impact of blood flow after the implantation, and the deviation of the valve leaf catching device from the root of the heart valve leaf can cause: after the valve is implanted, chordae tendineae are clamped between the valve and the valve leaflet capturing device, the valve leaflet capturing device is in interference fit with the artificial valve, the relative acting force is large, the chordae tendineae are thin in size, and the chordae tendineae can break in the long-term heart beating process, so that the whole structure is unbalanced, and a series of problems such as paravalvular leakage, outflow obstruction and the like are caused.

Disclosure of Invention

The utility model aims to provide a valve leaf catching device which is used for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a device is catched to valve leaflet, includes the line body, the line body is the heliciform, the line body is including distal end coil, middle coil and the proximal end coil that sets up in order, distal end coil set up in the distal end of line body, the proximal end coil set up in the proximal end of line body, the helical inner diameter of proximal end coil with the helical inner diameter of distal end coil is all greater than the helical inner diameter of middle coil, the proximal end coil sets up to two rings at least, the helical inner diameter of proximal end coil increases gradually from heart valve leaflet to atrium direction, just the proximal end coil with the inseparable laminating of the inner wall of atrium.

Further, the proximal wire has a helical inner diameter in the range of: 40mm-50mm.

Further, a plurality of protruding structures are arranged on the proximal coil, and the protruding structures are in contact with the inner wall of the atrium.

Further, the shape of the convex structure is semicircular or polygonal.

Further, the wire body cross-sectional diameter is set to: 0.9-1mm.

Further, the cross-sectional diameter of the proximal coil gradually increases from the heart valve leaflet to the atrium, and the smallest cross-sectional diameter of the proximal coil is equal to or larger than the cross-sectional diameters of the other coils.

Further, the pitch of the proximal coil and the pitch of the intermediate coil are both set to: 1-1.5mm.

Further, the device further comprises a transition coil, wherein the transition coil is arranged between the proximal coil and the intermediate coil, and the height of the transition coil is set as follows: 7-10mm.

Further, the proximal end of the proximal coil is provided with a proximal connector connectable with a delivery device for transporting the leaflet capturing device.

Possible benefits of the leaflet capturing devices disclosed herein include, but are not limited to: the proximal coil of the spiral wire body is arranged to be at least two circles, and the spiral inner diameter of the proximal coil is gradually increased from the heart valve leaflet to the atrium, so that the stability of the proximal coil on the atrium side is improved, the proximal coil is tightly attached to the inner wall of the atrium, the proximal coil is not easy to roll over under the impact of blood flow and cannot slide towards the ventricle side, the middle coil is kept at the root position of the heart valve leaflet, the implantation depth of the heart valve leaflet capturing device is reduced, left ventricular outflow obstruction is avoided, and the occurrence of paravalvular leakage is prevented; the small bulge structure can increase the friction force between the proximal coil and the inner wall of the atrium, prevent the slippage between the proximal coil and the inner wall of the atrium, and prevent the deviation of the integral position of the leaflet capturing device; the cross-sectional diameter of the proximal coil is gradually increased from the heart valve leaflet to the atrium, and the cross-sectional diameter of the circular material is in direct proportion to the rigidity of the circular material, so that the rigidity of the proximal coil which is closer to the atrium is higher, and the proximal coil can be provided with a larger supporting force, so that the whole fishing device is more stable, and the problems that the fishing device deviates from the root of the heart valve leaflet under the impact of blood flow, chordae tendineae are clamped between the valve and the fishing device, and fracture, perivalvular leakage and outflow obstruction are caused in the long-term heart beating process are avoided; by reducing the screw pitches of the proximal coil and the middle coil, the overall stability of the valve leaf catching device is enhanced, and meanwhile, the loose state of the valve leaf catching device caused by excessive stretching can be avoided, so that the depth of the implanted valve She Bulao device is reduced, and left ventricular outflow obstruction is avoided; by reducing the height of the transition coil, the middle coil is more attached to the mitral valve root after the valve She Bulao device is implanted, the implantation depth of the ventricular side of the leaflet capturing device is reduced, and left ventricular outflow obstruction is avoided; the cross-section diameter of the wire body of the valve leaf catching device is increased, so that the overall rigidity of the valve leaf catching device is increased, the valve leaf catching device is not easy to stretch and deform, and the stability of the valve leaf catching device after implantation is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

FIG. 1 is a schematic view of the structure of the leaflet capturing device of the present utility model;

FIG. 2 is a schematic cross-sectional view of the leaflet capturing device of the present utility model disposed about a heart leaflet;

FIG. 3 is an enlarged partial schematic view of the leaflet capturing device of FIG. 2 at a;

FIG. 4 is an enlarged partial schematic view of the leaflet capturing device of FIG. 3 at b;

in the figure: 1-a wire body; 2-a distal coil; 3-an intermediate coil; 4-proximal coil; 5-transition coils; 6-a bump structure; 7-heart valve leaflet.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the embodiments described below are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1-3, the present utility model provides a technical solution:

the utility model provides a device is catched to valve leaflet, includes wire body 1, wire body 1 is the heliciform, wire body 1 is including distal end coil 2, middle coil 3 and the proximal end coil 4 that set up in order, distal end coil 2 set up in the distal end of wire body 1, proximal end coil 4 set up in the proximal end of wire body 1, the helical inner diameter of proximal end coil 4 with the helical inner diameter of distal end coil 2 is all greater than the helical inner diameter of middle coil 3, somewhere the helical inner diameter is the diameter of the circular ring coil of heliciform wire body 1 here, proximal end coil 4 sets up to two at least, the helical inner diameter of proximal end coil 4 increases gradually from heart valve leaflet 7 to the atrium direction, thereby makes proximal end coil 4 with the inner wall of atrium closely laminates.

Taking the mitral valve as an example, the proximal end of the proximal coil 4 is provided with a proximal end connector, the leaflet capturing device can be sent to the mitral valve through the delivery device, the leaflet capturing device is fixed to the delivery device after the proximal end connector is connected with the delivery device, the leaflet capturing device can be accurately arranged on the proper position of the mitral valve leaflet, the spiral inner diameter of the proximal coil 4 and the spiral inner diameter of the distal coil 2 are both larger than the spiral inner diameter of the middle coil 3, when the leaflet capturing device is delivered to the periphery of the mitral valve, the distal coil 2 can capture the mitral valve leaflet more conveniently, the middle coil 3 is wrapped around the heart leaflet, and enough radial supporting force can be provided for the implanted artificial valve.

Because the structure of the valve leaf catching device is similar to a spring structure, if the number of loops of the proximal coil 4 is less than one loop and only the proximal coil is arranged on the inner wall of an atrium, and meanwhile, because the inner wall of the atrium is smooth, under the action of blood flow, the contact area of the proximal coil 4 with the inner wall of the atrium is insufficient due to the fact that the proximal coil 4 is too thin, the stability of the valve leaf catching device on the side of the atrium is not high, gaps exist in the circumference of the proximal coil 4, the valve leaf catching device is easy to incline or rollover towards one side and deviate from the root of the heart valve leaf 7 under the impact of blood flow, a series of problems such as peripheral leakage and outflow obstruction are caused, and because the inner diameter of the atrium is gradually increased from the heart valve leaf 7 to the direction of the atrium, other positions of the valve leaf catching device of a single proximal coil 4 once having the inclination or slippage trend cannot provide enough restraining force to prevent the occurrence of the trend, and finally the whole valve leaf catching device can be inclined or slipped, so that the proximal coil 4 is designed into at least two loops, the stability of the valve leaf catching device on the side of the atrium is easy to roll over the side under the impact of the blood flow and the valve leaf catching device is not easy to occur; further, the spiral inner diameter of the proximal coil 4 is set to gradually increase from the heart valve leaflet 7 to the atrium, thereby enabling a better fitting of the proximal coil 4 to the atrium, thereby providing more support by the atrium wall.

Through the arrangement, after the valve She Bulao device is implanted into a human body, the proximal coil 4 cannot easily slide towards the ventricle side, so that the depth of the valve She Bulao device implanted into the ventricle side is reduced, the left ventricle is prevented from flowing out to the obstruction caused by the deep anchoring of the valve leaf capturing device and the artificial valve, and meanwhile, the chordae tendineae can be prevented from being broken by clamping between the valve leaf capturing device and the valve, and the occurrence of the accident that the valve leaf capturing device is knocked down in the ventricle by blood flow before the valve stent is implanted can be avoided.

In some embodiments, the proximal wire has a helical inner diameter ranging from: 40mm-50mm, which is in accordance with the physiological structure of the inner wall of the atrium, and a person skilled in the art can determine the size of the spiral inner diameter of the proximal coil 4 according to the specific condition of the atrium of the patient, so that the shape of the proximal coil 4 is more in accordance with the shape of the inner wall of the atrium of the patient, and the supporting and attaching effects are better, thereby providing more supporting force by the atrium wall and preventing the perivalvular leakage; practice proves that the above arrangement can achieve a good fixing effect, when the valve She Bulao device is implanted, inclination or slippage cannot occur easily, the valve She Bulao device is stable enough, and the increase of the depth of the valve leaf catching device in the ventricular direction after the implantation of the valve 7 can be avoided, the valve leaf catching device and the valve are prevented from being anchored deeply, and the blood flow channel flowing through the aorta from the left ventricle is prevented from being too narrow, so that obstruction is caused.

Further, the proximal coil 4 is provided with a plurality of protruding structures 6, the protruding structures 6 are in contact with the inner wall of the atrium, and as the inner wall of the atrium and the proximal coil 4 are smooth and are easy to slip when in contact, friction force between the inner wall of the atrium and the proximal coil is properly increased by adding the protruding structures 6 on the proximal coil 4, slipping is avoided, stability of the proximal coil 4 in the atrium is improved, and therefore the middle coil 3 is closer to the root of the heart valve leaflet 7.

The protruding structures 6 are semicircular or polygonal in shape, see fig. 4, and the use of semicircular or polygonal micro protruding structures 6 can increase the friction between the proximal coil 4 and the inner wall of the atrium, while avoiding that these micro protrusions are too sharp to damage the inner wall of the atrium.

Further, the cross-sectional diameter of the proximal coil 4 gradually increases from the heart valve leaflet 7 to the atrium, and since the cross-sectional diameter of the coil is proportional to the stiffness thereof, the larger the cross-sectional diameter of the proximal coil 4 is, the higher the stiffness thereof is, the closer to the upper end of the proximal coil 4, the larger the interaction force between the proximal coil 4 and the atrium inner wall is when the same deformation occurs, and the sufficient supporting force is maintained from the uppermost end of the proximal coil, which is more beneficial to the stability of the whole valve leaflet capturing device. Therefore, the stiffness of the proximal coil 4 is larger closer to the atrium, so that a larger supporting force can be provided for the proximal coil 4, the overall stability of the capturing device is further ensured, for example, the cross-sectional diameter of the proximal coil 4 gradually increases from 0.9mm to 1mm from the heart valve leaflet 7 to the atrium, the cross-sectional diameters of other coils are all set to 0.9mm, the proximal coil 4 has enough stiffness and cannot be too soft, enough supporting force can be provided for the whole of the leaflet capturing device, and in order to ensure the consistency of the whole thickness of the wire body 1, stress concentration is avoided, and therefore, the minimum cross-sectional diameter of the proximal coil 4 is ensured to be more than or equal to the cross-sectional diameters of other coils.

The arrangement can effectively fix the proximal coil 4 in the atrium, can obtain enough supporting force from the inner wall of the atrium, can not easily enable the proximal coil 4 of the leaflet capturing device to slide towards the ventricle side after the implantation of the leaflet She Bulao device, ensures that the middle coil 3 can be positioned at the root position of the heart leaflet 7, avoids increasing the implantation depth of the ventricular side leaflet capturing device, leads to the fact that chordae are clamped between the artificial heart valve and the leaflet capturing device due to the fact that the leaflet capturing device and the artificial heart valve are anchored more deeply, and causes chordae to break, thereby unbalance of the whole leaflet capturing device, a series of problems such as paravalvular leakage and outflow obstruction are caused.

Further, the pitch of the proximal coil 4 and the pitch of the intermediate coil 3 are both set as: the pitch of a conventional leaflet fishing device is typically set to 1-1.5 mm: 2-2.5mm, the pitch of this scheme valve leaf fishing device wholly reduces, see fig. 1, reduce the pitch between the valve leaf fishing device coil and can make more closely laminating between the coil, increase valve leaf fishing device holistic stability on the one hand, on the other hand valve She Bulao device is difficult to be stretched after implanting, avoid appearing loose state, avoid the valve leaf fishing device to be too dark towards the degree of depth of ventricular direction when anchoring with the valve, improve valve leaf fishing device promptly and valve in the ventricle anchoring height, avoid causing from left ventricle to flow through the blood flow channel of aorta too narrow, thereby cause the obstruction.

Further, the device further comprises a transition coil 5, referring to fig. 1, the transition coil 5 is disposed between the proximal coil 4 and the intermediate coil 3, and the height of the transition coil 5 is set as follows: the height of the transition coil 5 of the conventional leaflet fishing apparatus is generally set to 7-10 mm: 10-15mm, the transition coil 5 of this scheme reduces to some extent, reduces transition coil 5 height and can make middle coil 3 laminate mitral valve root more after the device implantation of lamella She Bulao, reduces the depth of valve She Bulao device implantation back towards the ventricular direction, improves the valve leaf promptly and catches device and valve in the indoor anchoring height to avoid causing left ventricle outflow obstruction.

Further, the cross-sectional diameter of the wire body 1 is set as follows: the cross-sectional diameter of the wire 1 of the conventional leaflet fishing device is generally set to be 0.9-1mm, preferably 1mm throughout the wire 1: the whole rigidity of the valve leaf catching device can be increased by increasing the wire diameter of the wire body 1 by 0.7-0.85mm, so that the valve leaf catching device is not easy to generate too large deformation when anchored, but can obtain enough supporting force at the same time, and the stability of the valve leaf catching device after implantation is improved.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. The utility model provides a device is catched to valve leaflet, includes the line body, the line body is the heliciform, the line body is including distal end coil, middle coil and the proximal end coil that sets up in order, distal end coil set up in the distal end of line body, the proximal end coil set up in the proximal end of line body, the helical inner diameter of proximal end coil with the helical inner diameter of distal end coil is all greater than the helical inner diameter of middle coil, a serial communication port, the proximal end coil sets up to two rings at least, the helical inner diameter of proximal end coil increases gradually from heart valve leaflet to atrium direction, just the proximal end coil with the inner wall of atrium closely laminates.

2. The leaflet fishing device of claim 1 wherein the proximal wire has a spiral inner diameter ranging from: 40mm-50mm.

3. The leaflet capturing device of claim 1, wherein the proximal coil is provided with a plurality of raised structures, the raised structures being in contact with an inner wall of the atrium.

4. A leaflet capturing device according to claim 3, wherein the convex structure is semi-circular or polygonal in shape.

5. The leaflet capturing device of claim 1, wherein the wire body cross-sectional diameter is set to: 0.9-1mm.

6. The leaflet capturing device of claim 1, wherein a cross-sectional diameter of the proximal coil increases gradually from the heart leaflet to the atrium, and a minimum cross-sectional diameter of the proximal coil is equal to or greater than a cross-sectional diameter of the other coils.

7. The leaflet capturing device of claim 1, wherein the pitch of the proximal coil and the pitch of the intermediate coil are each configured to: 1-1.5mm.

8. The leaflet fishing device of claim 1, wherein the wire body further comprises a transition coil disposed between the proximal coil and the intermediate coil, the transition coil having a height set to: 7-10mm.

9. The leaflet capturing device of claim 1, wherein the proximal end of the proximal coil is provided with a proximal fitting connectable with a delivery device for transporting the leaflet capturing device.