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An asymmetric heart valve prosthesis

A heart valve, asymmetric technology, applied in the field of medical devices, can solve problems such as increasing the size of the stent, and achieve the effects of avoiding traction, reducing thrombus formation, and reducing volume

Active Publication Date: 2020-04-17
NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems caused by simply increasing the size of the stent in the existing anchoring technology. On the basis of ensuring the anchoring effect of the implanted valve, it matches the physiological and anatomical structure of the mitral valve well and optimizes the performance of the valve. It can reduce the impact on the outflow tract after the stent is released, avoid the pulling of the native valve annulus, and ensure that the opening area of ​​the valve will not change too much due to the huge difference between the valve annulus of the patient, reducing the manufacturer's product specifications. The stocking pressure will not affect the opening and closing performance of the valve due to the compression of the patient's valve ring

Method used

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  • An asymmetric heart valve prosthesis
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Examples

Experimental program
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specific Embodiment 1

[0080] For a long time, whether it is Edwards or Medtronic, major valve manufacturers have used enlarged stent-annular radial expansion ratios to obtain sufficient stent anchoring force. This has been used in the fields of aortic valve interventional replacement and pulmonary valve interventional replacement. It has been fully applied and has become a consensus (usually 10%-15% is the ideal circumference expansion ratio). Later, Jenavalve and Symetic both applied the clamping valve leaflet mechanism to their products, and still had a certain expansion ratio for the patient's valve. However, atrioventricular valves (including mitral and tricuspid valves) due to their complex physiological structures and disease mechanisms often make accurate positioning and fixation of products very difficult. The current technologies for atrioventricular valve interventional replacement, such as Edwards, Medtronic, and Tiara, all need to provide a certain radial expansion ratio to meet the anch...

specific Embodiment 2

[0089] In one embodiment, such as Figure 6a-6c As shown, an asymmetric heart valve prosthesis 200 includes a stent 210 and an artificial valve 220. The stent 210 includes an atrial section 211, a support section 213, and a valve sewing section 212, which is different from fixing the outer frame to the inner frame The gap between the bottom end, and then the existing technology of covering the gap between them (CN201480035996.8), in the present invention, the support section 213 is connected to the distal end of the valve sewing section 212, which can greatly reduce The volume of the gap, blood is not easy to stay in the gap, effectively reducing thrombosis, and higher safety. The cross section of the supporting section 213 is D-shaped, the atrium section 211 is connected to the distal end of the valve sewing section 212, and the artificial valve 220 is fixedly connected to the valve sewing section 212. A cross section perpendicular to the central axis of the artificial valve 2...

specific Embodiment 3

[0095] Such as Figure 7a As shown, an asymmetric heart valve prosthesis 300 includes a stent 310 and an artificial valve (not shown). The stent 310 includes an atrial segment 311, a support segment 313, and a valve sewing segment 312, the support segment 313 and The distal part of the valve sewing section 312 is connected, the cross section of the support section 313 is D-shaped, the atrial section 311 is connected with the distal part of the valve sewing section 312, and the artificial valve 320 is Fixedly connected to the valve sewing section 312. On a cross section perpendicular to the central axis of the artificial valve 320, the center of the valve sewing section 312 is set at the center of the support section 313 and the Between the "D"-shaped arc segments of the supporting section 313, the cross-sectional area of ​​the valve sewing section 312 is smaller than the cross-sectional area of ​​the patient's own valve annulus. In the free state, the valve sewing section 312 A...

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Abstract

The present invention relates to an asymmetric heart valve prosthesis, which includes a stent and an artificial valve, the stent includes an atrium segment, a support segment and a valve sewing segment, and the support segment is connected with the distal part of the valve sewing segment , the atrium segment is connected to the support segment, or the atrium segment is connected to the distal part of the valve sewing segment, and the artificial valve is fixedly connected to the valve sewing segment, perpendicular to the On the cross-section of the central axis of the artificial valve, the center of the valve sewing section does not coincide with the center of the support section, and the cross-sectional area of ​​the valve sewing section is smaller than the cross-sectional area of ​​the patient's own valve annulus , in a free state, the valve sewing segment is at least partially located between the patient's own valve leaflets, and the cross-sectional area of ​​the atrium segment is greater than or equal to the cross-sectional area of ​​the patient's native valve annulus.

Description

Technical field: [0001] The invention belongs to the field of medical devices, and specifically relates to an asymmetric heart valve prosthesis. Background technique: [0002] The mitral valve is located at the left atrioventricular orifice and consists of five parts: annulus, leaflets, chordae, papillary muscles, and junctions. Its anatomically accurate name is mitral apparatus or mitral valve compound Body (mitralcomplex). The mitral valve annulus is a band of fibrous tissue attached to the edge of the left atrioventricular foramen. It has an irregular "D" shape. The anterior third of the mitral annulus is the continuous part of the anterior valve and the aorta. The anterior valve The angle formed by the atrium corresponding to the posterior valve and the mitral valve annulus is also different, and the left atrial appendage is attached to the atrium. Mitral valve insufficiency is one of the most common heart diseases, such as mitral valve insufficiency caused by mitral valve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/24
CPCA61F2/2418A61F2/2448A61F2/2466A61F2210/00A61F2230/0034
Inventor 吕世文李毅斌徐志云陆方林宋智钢陈志李佳楠
Owner NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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