| 摘要 |
<p>An artificial valve (5; 10; 20; 30; 50) for implantation in a body, in or adjacent to a blood vessel, comprising a casing (12; 37; 61 ) and an opening and closing mechanism, at least part of said mechanism being a moving part (11; 21, 22; 31, 32, 33; 51 ) adapted to make an opening and a closing movement to assume an open and a closed position for opening and closing, of the blood through said blood vessel, and positions between said open and closed positions, said closing movement of the moving part (11; 21, 22; 31, 32, 33; 51 ) being initiated and carried out when a threshold value is reached by a parameter of the mammal or of a device (8) used by the mammal. The opening and closing mechanism is arranged to cause the moving part (51 ) to its closing movement by means of giving the moving part kinetic energy in a plurality of steps.</p> |
