TW202010480A - Transvalvular anchoring device for aortic valve sparing - Google Patents

Abstract

A transvalvular anchoring device for aortic valve sparing is provided. The transvalvular anchoring device includes a first fixing member for fixing the aortic stent graft and having elasticity, a connecting member having elasticity and a second elastic body placed on aortic annulus and left ventricular outflow and having elasticity. The first fixing member is connected to a top of the connecting member, a bottom of the connecting member is connected to the second fixing member, the second fixing member is located under aortic valve, and the connecting member passes through the commissure between valve leaves, and the first fixing member is located above the aortic valve. The device is simple in structure, convenient to use, and can effectively fix an aortic stent graft and prevent it from slipping or causing tearing of ascending aorta.

Description

Aortic valve-preserving transvalvular anchoring device

The invention relates to an aortic vascular stent fixing device, in particular to a transvalvular anchoring device that retains an aortic valve. .

In the case of existing aortic vascular stents used for vascular leakage, when the aortic vascular stent is used for the position of the blood vessel above the active valve, due to the great pressure of blood flow ejected by the heart, during the long-term use of the aortic vascular stent It is easy to cause the fixation of the aortic vascular stent, and the aging expansion and extension of the ascending aorta itself, which is likely to cause the intermittent slip of the aortic vascular stent, which leads to the ascending aorta tearing.

In view of the above existing problems, the technical problem to be solved by the present invention is to provide a span of the reserved aortic valve that has a simple structure, is easy to use, and can effectively fix the aortic vascular stent and prevent the long-term slip of the aortic vascular stent. Valve anchoring device.

The invention provides an aortic valve-preserving transvalvular anchoring device, which includes an elastic first fixing member for fixing an aortic vascular stent, an elastic connecting member, and an elastic first fixing member placed in the left ventricular outflow tract Two fixing pieces, the first fixing piece is connected to the top of the connecting piece, the bottom of the connecting piece is connected to the second fixing piece, the second fixing piece is located below the active valve and is connected to the left ventricular outflow tract Clamp, the connecting member passes through the active valve, the connecting member is used to pull the first fixing member, and the first fixing member is located at the distal end of the active valve.

Further, both the first fixing member and the second fixing member are in a wave-shaped circular ring shape.

Further, the undulating directions of the first fixing member and the second fixing member are parallel to each other between the connecting members.

Further, the inner diameter of the first fixing member is larger than the inner diameter of the second fixing member.

Further, the first fixing piece, a connecting piece and the second fixing piece have an integrated structure.

Further, a plurality of third fixing pieces are provided on the top of the first fixing piece, and a plurality of fourth fixing pieces are provided on the bottom of the second fixing piece.

Further, the shape of the third fixing member is the same as that of the first fixing member, and the third fixing member and the first fixing member are mirror images of a plane perpendicular to the connecting member.

Further, the shape of the fourth fixing member is the same as that of the second fixing member, and the fourth fixing member and the second fixing member are mirror images of a plane perpendicular to the connecting member.

Further, the first fixing piece, the connecting piece, the second fixing piece, the third fixing piece, and the fourth fixing piece are all made of memory alloy.

Further, the connecting member is one or more connecting rods evenly distributed between the first fixing member and the second fixing member, and the connecting rod may face the inside or outside of the first fixing member and the second fixing member tilt.

The beneficial effect of the present invention is that: in the transvalvular anchoring device retaining the aortic valve of the present invention, the first fixing member can be engaged with the aortic vascular stent when the aortic vascular stent is retracted distally , The first fixing piece and the aortic vascular stent can be tighter and tighter, so as to effectively prevent the separation phenomenon between the aortic vascular stent and the first fixing bracket, and through the connection of the connecting piece, when the heart will When the blood flow is ejected, the aortic stent will move in the same direction as the blood flow direction, and the first fixing member will also show the movement trend in the same direction as the blood flow direction, because the second fixing member can be The chamber outflow channel is clamped to maintain a fixed state, and the second fixing member is not directly connected to the first fixing member at a position other than the connecting member, so the first fixing member except the When a non-vertical upward force is applied at other positions where the connecting member connects the first fixing member and the second fixing member, the second fixing member does not move, and the first fixing member Even if a small range of slip occurs, it will be quickly reset due to the elasticity of the first fixing member, so that the aortic vascular stent is pulled back to the original position, thereby effectively avoiding the long-distance slip phenomenon of the aortic vascular stent. The connecting rod may be inclined toward the inside or outside of the first fixing member and the second fixing member to prevent the aortic stent graft from covering the coronary opening and reducing the connecting rod stress.

In order to more clearly explain the technical solutions in the embodiments of the present invention, the drawings required in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only preferred embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

1‧‧‧ First fixing

2‧‧‧Connector

3‧‧‧Second fixing piece

4‧‧‧The third fixing

5‧‧‧Fourth fixing piece

1 is a schematic view of the overall structure of the first embodiment of the transvalvular anchoring device retaining the aortic valve of the present invention; FIG. 2 is a general structural view of the first embodiment of the transvalvular anchoring device retaining the aortic valve of the present invention; 3 is an overall structural diagram of Embodiment 2 of the transvalvular anchoring device retaining the aortic valve of the present invention.

In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention will be further described in conjunction with the drawings.

Example one

1 to 2, the present invention provides an aortic valve-preserving transvalvular anchoring device, including an elastic first fixing member 1 for fixing an aortic vascular stent, an elastic connecting member 2 and a left An elastic second fixing member 3 in the chamber outflow channel, the first fixing member 1 is connected to the top of the connecting member 2, the bottom of the connecting member 2 is connected to the second fixing member 3, the second The fixing member 3 is located below the active valve and is clamped with the left ventricular outflow tract. The connecting member 2 passes through the active valve. The connecting member 2 is used to pull the first fixing member 1 and the first fixing The component 1 is located at the distal end of the active valve, and the first fixing component 1 can be engaged with the aortic vascular stent. When the aortic vascular stent retracts distally, the first fixing component 1 and the aorta The vascular stent can be tighter and tighter, thereby effectively preventing the separation phenomenon between the aortic vascular stent and the first fixing frame, and through the connection effect of the connecting member 2, when the heart ejects blood flow, the aortic vascular stent There will be a movement trend in the same direction as the blood flow direction, and the first fixing member 1 will also have a movement trend in the same direction as the blood flow direction, because the second fixing member 3 can be held by the left ventricular outflow tract and maintained In a fixed state, and the second fixing member 3 is not directly connected to the first fixing member 1 at a position other than the connecting member 2, so the first fixing member 1 is connected to the first fixing member 1 except for the connecting member 2 During the application of a non-vertical upward force at other positions of the first fixing member 1 and the second fixing member 3, the second fixing member 3 will not move, and the first fixing member 1 Even if a small range of slip occurs, it will be quickly reset due to the elasticity of the first fixing member 1, so that the aortic vascular stent is pulled back to the original position, thereby effectively avoiding the long-distance slip of the aortic vascular stent In addition, this device does not affect patients undergoing interventional or surgical aortic valve replacement surgery.

The first fixing member 1 and the second fixing member 3 both have a wavy circular ring shape, and the wavy circular ring shape can make the structure between the first fixing member 1 and the aortic vascular stent more similar , So as to fit more closely, greatly improving the firmness of the connection between the first fixation element 1 and the aortic vascular stent. Since the structure of the active valve is similar to the hollowed-out hemisphere in the middle, the wavy shape of the second fixation element 3 It can be clamped tightly with the active valve, and the clamping effect is better.

The undulating directions of the first fixing member 1 and the second fixing member 3 are parallel to the connecting member 2, and the undulating direction of the wave through the first fixing member 1 is parallel to the connecting member 2, so that The contact between the first fixing member 1 and the aortic blood vessel stent is closer, thereby facilitating the clamping of the aortic blood vessel stent.

The inner diameter of the first fixing member 1 is larger than the inner diameter of the second fixing member 3, so that the second fixing member 3 can be better placed in the left ventricular outflow tract, thereby better adapting to the aorta and the left ventricle The diameter of the outflow channel is inconsistent.

The first fixing member 1, a connecting member 2 and the second fixing member 3 are of an integrated structure, and the strength of the device can be effectively enhanced through the integrated structure, and the first fixing member 1, the connecting member 2 and the second fixing The combination between the pieces 3 is better and the effect is good.

Example 2

Referring to FIG. 3, the difference between this embodiment and the first embodiment is that a plurality of third fixing members 4 are provided on the top of the first fixing member 1, and a plurality of fourth fixing members 5 are provided on the bottom of the second fixing member 3 , The third fixing member 4 can effectively increase the contact area between the first fixing member 1 and the aortic vessel stent, and the effect of preventing shedding is better, while the fourth fixing member 5 can increase the second fixing member 3 and The contact area of the left ventricular outflow tract is more stable.

The shape of the third fixing member 4 is the same as that of the first fixing member 1, and the third fixing member 4 and the first fixing member 1 are formed by mirror image of the plane perpendicular to the connecting member 2, by The cooperation between the third fixing member 4 and the first fixing member 1 can be engaged with the aortic vascular stent through the wave peak position of the wave-shaped structure, because the wave peaks between the third fixing frame and the first fixing frame are interlaced with each other , So that the fixing effect is better.

The shape of the fourth fixing member 5 is the same as that of the second fixing member 3, and the fourth fixing member 5 and the second fixing member 3 are mirror images of the plane perpendicular to the connecting member 2, the fourth fixing The cooperation between the member 5 and the second fixing member 3 can avoid the situation of left and right shaking.

The first fixing member 1, the connecting member 2, the second fixing member 3, the third fixing member 4 and the fourth fixing member 5 are all made of memory alloy, which can be more conveniently placed into the blood vessel of the human body from the outside of the human body, And the elasticity is good, the use effect is better.

The connecting member 2 is one or more connecting rods evenly distributed between the first fixing member 3 and the second fixing member 4, and the connecting rod may face the inner side of the first fixing member 3 and the second fixing member 4 Or the outer side is inclined. When a connecting rod is used, the device can be prevented from turning over when the blood flow is impacted. In addition, when only three connecting rods are used, the connecting rods are located at the junction between the aortic valves, which can prevent The proximal end of the aortic vascular stent covers the coronary artery opening, and can avoid causing obvious valve regurgitation; and the tilting effect of the connecting rod makes the device adapt to the angle and shape of the left ventricular outflow tract and the aortic root, In addition, it can ensure that the first fixing member 3 is in the middle position of the lumen of the aorta, avoiding too tight contact between the first fixing member 3 and the inner wall of the aorta, thereby greatly reducing the possibility of aortic tear.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the present invention. Within the scope of protection.

1‧‧‧ First fixing

2‧‧‧Connector

3‧‧‧Second fixing piece

Claims (10)

An aortic valve-preserving transvalvular anchoring device is characterized by comprising an elastic first fixing member for fixing an aortic vascular stent, an elastic connecting member and an elastic elastic member placed in the left ventricular outflow tract A second fixing piece, the first fixing piece is connected to the top of the connecting piece, the bottom of the connecting piece is connected to the second fixing piece, the second fixing piece is located below the active valve and is connected with the left ventricular outflow tract The connection piece passes through the active valve, the connection piece is used to pull the first fixing piece, and the first fixing piece is located at the distal end of the active valve. The transvalvular anchoring device for retaining an aortic valve according to claim 1, wherein both the first fixing member and the second fixing member are in a wavy circular ring shape. The transvalvular anchoring device for retaining an aortic valve according to claim 2, wherein the undulating directions of the first fixing member and the second fixing member are parallel to each other between the connecting members. The transvalvular anchoring device retaining the aortic valve according to claim 2, wherein the inner diameter of the first fixing member is larger than the inner diameter of the second fixing member. The transvalvular anchoring device for retaining an aortic valve according to claim 1, wherein the first fixing member, a connecting member and the second fixing member are of an integrated structure. The transvalvular anchoring device for retaining aortic valve according to claim 1, wherein a plurality of third fixing members are provided on the top of the first fixing member, and a plurality of fourth fixing members are provided on the bottom of the second fixing member Pieces. The aortic valve-preserving transvalvular anchoring device according to claim 6, wherein the third fixing member has the same shape as the first fixing member, and the third fixing member and the first fixing member The room is mirrored by a plane perpendicular to the connecting piece. The transvalvular anchoring device for retaining an aortic valve according to claim 6, wherein the shape of the fourth fixing member is the same as that of the second fixing member, and between the fourth fixing member and the second fixing member The connecting piece is formed by mirror image of a perpendicular plane. The transvalvular anchoring device for retaining aortic valve according to claim 6, wherein the first fixing member, the connecting member, the second fixing member, the third fixing member and the fourth fixing member are all made of memory alloy . The aortic valve-preserving transvalvular anchoring device according to claim 1, wherein the connecting member is one or more connecting rods evenly distributed between the first fixing member and the second fixing member, the The connecting rod may be inclined toward the inside or outside of the first fixing member and the second fixing member.

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