Durability-enhanced trifoliate bioprosthetic valve graft and preparation method thereof

Abstract

The invention provides a durability-enhanced trifoliate bioprosthetic valve graft. The graft is characterized by comprising a graft body; a membranae tectoria and a trifoliate bioprosthetic valve body; the membranae tectoria wraps the graft body, the trifoliate bioprosthetic valve body is arranged in the graft body and proivded with three valve leaflets and two reinforced protrusions, wherein each valve leaflet is provided with a valve leaflet main body and a reinforced suture part, each valve leaflet main body is shaped like a quasi semiellipse and is provided with a large curved edge, a small curved edge, and a first end and a second end which are located at the joint of the large curved edge and the small curved edge, each first end and the second end of the adjacent valve leaflet main body are overlapped and sutured together, and each reinforced suture part is overlapped and sutured on the corresponding large curved edge, and sutured on a stent skeleton and the membranae tectoria; the two reinforced protrusions are connected to the ends of the adjacent large curved edges of the two valve leaflets on the outermost sides respectively, and the two reinforced protrusions are mutually overlapped and then sutured on the stent skeleton and the membranae tectoria; the three valve leaflet main bodies and two reinforced protrusions are integrally cut, and the graft is formed.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a durability-enhanced three-leaf biological valve graft and a preparation method thereof. Background technique [0002] Valvular heart disease is a group of diseases characterized by structural damage, fibrosis, adhesion, shortening, myxomatous degeneration, ischemic necrosis, calcinosis, or congenital malformation of heart valves (including leaflets, chordae, and papillary muscles). disease. Aortic valve degenerative stenosis is the most common primary degenerative valvular disease. The disease has a high incidence, insidious onset, rapid progression, and extremely poor prognosis. Among people over 75 years old, the incidence of aortic valve stenosis was 4.6%, and the incidence of moderate to severe stenosis was as high as 2.8%. There are no obvious clinical manifestations in the early stage of the disease. However, in the advanced stage of the disease, once symptoms appear, th...

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Problems solved by technology

However, as our country enters an aging society, for example, the average life expectancy of the population in Shanghai is as high as 82 years old, and the age requirement for this type of surgery is ≥70 years old, so the durability of the existing aortic valve stents is far from meeting the survival needs of the population

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