ARTIFICIAL VALVE FOR A BLOOD VESSEL

摘要

An artificial valve for a vessel (100) containing blood (104) flowing in a given preferential direction (103). The valve comprises an oblong body (2) with a cross-section that may be expanded from one end (3) to the other end (4), means (5) for attaching a point (34) on the oblong body to a point (106) on the vessel wall (101) so that one end (3) is located upstream (102) in the direction of blood flow relative to the other end (4), and means for causing an increase, should a backflow of blood occur, in the value of a cross-sectional projection of the expandable end (4) of the oblong body (2) onto a plane (6) substantially perpendicular to the longitudinal axis, until said projection is substantially the same as the cross-section of the vessel. The valve may be used as a prosthetic valve in veins.