| 摘要 |
A prosthetic heart valve includes a prosthetic valve annulus and at least one prosthetic valve leaflet member including at least one coaptation surface configured for cooperating with at least one corresponding coaptation surface of the prosthetic heart valve. At least one valve leaflet member is displaceable by blood flow between a closed position and an open position to produce, correspondingly, a contact and a separation of cooperating coaptation surfaces. In the open position the separation of the cooperating coaptation surfaces enables the blood flow through the orifice in a first direction, and in the closed position the contact of the cooperating coaptation surfaces prevents the blood flow through the orifice in a second direction, opposite to the first direction. The prosthetic heart valve includes at least one device configured for preventing at least in part the contact between cooperating coaptation surfaces, so that a blood regurgitation in the second direction is enabled, wherein the at least one device is configured for ceasing its action after a predetermined amount of time. |
| 主权项 |
1. A prosthetic heart valve including:
a prosthetic valve annulus defining an orifice for the passage of blood flow, at least one prosthetic valve leaflet member including at least one coaptation surface configured for cooperating with at least one corresponding coaptation surface of said prosthetic heart valve to regulate blood flow through said orifice, said at least one prosthetic valve leaflet member being displaceable by the blood flow between a closed position and an open position to produce, correspondingly, a contact and a separation of cooperating coaptation surfaces, wherein in the open position the separation of the cooperating coaptation surfaces enables the blood flow through said orifice in a first direction, wherein in the closed position the contact of the cooperating coaptation surfaces prevents the blood flow through said orifice in a second direction, opposite to said first direction, and at least one device configured for preventing at least in part the contact between cooperating coaptation surfaces, so that a blood regurgitation in said second direction is enabled, and in that said at least one device is configured for ceasing its action after a predetermined amount of time. |
