Asymmetrical 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 the pressure of stocking, and reducing the volume

Active Publication Date: 2017-01-25
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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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0084] For a long time, whether it is Edwards company or Medtronic company, major valve manufacturers have used enlarged stent-annulus radial expansion ratio to obtain sufficient stent anchoring force, which has been used in the field of aortic valve interventional replacement and pulmonary valve interventional replacement. It has been fully applied and has become a consensus (generally 10%-15% is the ideal circumference expansion ratio). Later, Jenavalve and Symetic applied the leaflet clamping mechanism to their products, and still had a certain expansion ratio for the patient's valve. However, due to the complex physiological structure and disease mechanism of atrioventricular valves (including mitral valve and tricuspid valve), it is often difficult to accurately position and fix the product. The current technologies for atrioventricular valve replacement, such as Edwards, Medtronic and Tiara, all need to provide a certain radial expansion ratio to meet the needs of anchor...

specific Embodiment 2

[0093] In one embodiment, as Figures 6a-6cAs shown, an asymmetric heart valve prosthesis 200 includes a stent 210 and a prosthetic valve 220. The stent 210 includes an atrial segment 211, a support segment 213, and a valve suture segment 212, which is different from fixing an outer frame to an inner frame. In the prior art (CN201480035996.8), in the present invention, the support section 213 is connected with the distal end of the valve sewing section 212, which can greatly reduce the Due to the volume of the gap, it is not easy for blood to stay in the gap, which effectively reduces the generation of thrombosis and is safer. The cross section of the support segment 213 is D-shaped, the atrium segment 211 is connected with the distal end portion of the valve sewing segment 212, and the artificial valve 220 is fixedly connected to the valve sewing segment 212. On the cross section perpendicular to the central axis of the prosthetic valve 220, the center of the valve sewing se...

specific Embodiment 3

[0099] like Figure 7a Illustrated, an asymmetric heart valve prosthesis 300 includes a stent 310 and a prosthetic valve (not shown), the stent 310 including an atrial segment 311, a support segment 313 and a valve sewn segment 312, the support segment 313 being connected to The distal end portion of the valve sewing segment 312 is connected, the cross section of the support segment 313 is D-shaped, the atrial segment 311 is connected to the distal end portion of the valve sewing segment 312, and the artificial valve 320 is It is fixedly connected to the valve sewing section 312, and 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 support segment 313, the cross-sectional area of ​​the valve sewing segment 312 is smaller than the cross-sectional area of ​​the patient’s native valve annulus, and in the fre...

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Abstract

The invention relates to asymmetrical heart valve prosthesis. The asymmetrical heart valve prosthesis comprises a stent and an artificial valve; the stent comprises an atrium section, a supporting section and a valve sewing section; the supporting section is connected with a far end part of the valve sewing section; the atrium section is connected with the supporting section, or the atrium section is connected with the far end part of the valve sewing section; the artificial valve is fixedly connected with the valve sewing section; in a cross section which is perpendicular to the central axis of the artificial valve, the centre of the valve sewing section is not overlapped with the centre of the supporting section; the cross-sectional area of the valve sewing section is smaller than that of an autologous valve ring of a patient; in a free state, the valve sewing section is at least partially positioned between autologous valve leaflets of the patient; the cross-sectional area of the atrium section is greater than or equal to that of the autologous valve ring of the patient.

Description

[0001] Technical field: [0002] The invention belongs to the field of medical devices, in particular to an asymmetric heart valve prosthesis. [0003] Background technique: [0004] The mitral valve is located at the left atrioventricular orifice and consists of five parts: the valve annulus, the valve leaflets, the chordae tendineae, the papillary muscles, and the junctional connection. body (mitralcomplex). The mitral valve annulus is a band of fibrous tissue attached to the edge of the left atrioventricular orifice, with an irregular "D" shape. The anterior third of the mitral valve annulus is the continuous part of the anterior valve and the aorta. 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 regurgitation caused by mitral valve prolapse conditions, such as...

Claims

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Application Information

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Patent Type & Authority Applications(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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