| 摘要 |
<p>1,118,816. Prosthetic heart valves. JOSEPH LUCAS (INDUSTRIES) Ltd. 15 Oct., 1965, No. 43752/65. Heading A5R. [Also in Division F2] A prosthetic heart valve comprises a ring- like part adapted when operatively in use to be secured in a heart valve orifice, a generally conical support structure carried by the ring- like part, and a plurality of flaps connected to the ring-like part and arranged on the outside of the support structure to cover a plurality of respective openings in the support structure. The flaps, which collectively have a generally conical form. are connected to the ring-like part in such a manner that a swirling motion is imparted to fluid flowing through the ring-like part when a pressure is applied to the valve to separate the flaps from the openings. As illustrated in Figures 1 and 2, ring-like part 10 is formed integrally with a hollow conical portion which is split to form four generally triangular segmental flaps 11 which are connected to the ring-like part and the flaps whereby a swirling motion is imparted to fluid flowing through the ring-like part. Situated within the flaps is a separate support structure 12 in which are four segmental openings 13 respectively covered by the flaps. The base of the support structure engages in a recess 14 in the interior surface of the ring- like part. The parts of the valve preferably are made from synthetic resinous materials, the support structure being more rigid than the remainder of the valve: the materials should be physiologically inert and non-toxic and should have a density approximating the density of blood.</p> |
