MELNIKOV, ALEXANDR PETROVICH,MELNIKOV, DENIS ALEXANDROVICH
申请号：
EP06844001
公开号：
EP1946724A4
申请日:
2006.12.08
申请国别(地区):
EP
年份:
2012
代理人:
摘要：
This invention covers the field of medicine and is used in cardiosurgery in operations on replacement of affected natural heart valves. The prosthesis (1) includes a ring-shaped valve body (2), leaflets (3) with the possibility of turning and forming of a main zone of the flow area at the centre of the opening of the valve body (2) installed in the valve body (2) and the turning stops (18) of leaflets (3). The turning stops (18) of leaflets (3) represent two pairs of prominences (4, 5) located on the end surface (6) of the valve body (2) directed to the downstream flow of blood. The first pair of prominences (4) has the internal surface (7), at least a part of which is made flat and has a possibility to interact with flat sections (14) of leaflets (3) for restriction of the return flow of blood in the closed position. The prominences (4) on the opposite lateral sides (16) have guiding surfaces (8) interacting with bearing surfaces (9) of the lateral surface (11) of leaflets (3) by their turning. The generating lines of the guiding surface are inclined angularly to their internal surface and have a shape corresponding to the turning trajectory of the bearing surfaces of the leaflets (3) determining the axes of their turning by opening and closing of the prosthesis (1). Each prominence (5) of the second pair is located opposite a part of the lateral surface (11) of the corresponding leaflet (3) the most distant from the central surface (10) and is able to interact with its internal surface (15) with the mentioned part of the lateral surface (11) of the leaflet (3) during opening of the heart valve prosthesis. The turning limit stops (18) of the leaflets (3) are equipped with at least two rests (12) interacting with the external surface (13) of the leaflet (3) directed to the downstream flow of blood in its open position determining the turning angle of the leaflets. A design version of a tri-leaflet valve and execution variant of turning stops are disclosed.
