Aortic valve stents to prevent paravalvular leaks

A technology for aorta and valves, which is applied in the field of medical devices, can solve problems such as valve performance degradation, increased sheath diameter, and difficulty in sheathing, achieving good compliance and shape memory performance, reducing the risk of vascular complications, and avoiding valve stents deformation effect
CN103705315BActive Publication Date: 2015-10-21NINGBO JENSCARE BIOTECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO JENSCARE BIOTECHNOLOGY CO LTD
Publication Date
2015-10-21

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Abstract

The invention discloses an aortic valve stent (100) capable of preventing perivalvular leakage. The aortic valve stent (100) capable of preventing perivalvular leakage comprises a stent (110) and an artificial valve (104), wherein the stent (110) is composed of a plurality of grid cells (112); the artificial valve (104) is connected to the grid cells (112); a sealing unit (106) is arranged at the bottom of the stent (110); the sealing unit (106) is made from a metal memory material and laminated; in a natural state, the sealing unit (106) is arched outwards along the axial direction of the stent and of an annular structure along the peripheral direction of the stent (110); one end of the sealing unit (106) is free and is a free end (116); the other end of the sealing unit (106) is fixed with the bottom of the stent (110) by a fixing element, and is a fixed end (126); when the sealing unit (106) is compressed to enter a sheathing canal, the free end (116) of the sealing unit (106) turns towards the bottom end of the stent and around the fixed end (126), thus the sealing unit (106) is not superposed with the stent (110).
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Description

Technical field:

[0001] The invention belongs to the field of medical devices, and in particular relates to an aortic valve stent for preventing paravalvular leakage. Background technique:

[0002] Aortic valve stenosis is a common heart valve disease in the elderly. The incidence rate is about 4% in patients aged 75-85, and increases to about 7% in patients over 85 years old. Among them, the incidence of aortic valve stenosis due to aortic valve calcification reaches 2%-7%, and with the increase of age, its proportion increases, and it has become an important cause of heart failure, arrhythmia, syncope and sudden death in the elderly one. Surgical valve replacement is the first traditional treatment method, but the mortality rate is very high for patients with advanced age, low heart function or multiple complications. Symptoms and recurrence rates are high.

[0003] Since 2002, Cribier et al took the lead in reporting the first case of human percutaneous aortic valve re...

Claims

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