Suture rings for heart valves and method of securing suture rings to heart valves
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 10, 1991
Grant Date -
N/A
app pub date -
Nov 7, 1990
filing date -
Nov 7, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A suture ring for a mechanical heart valve comprised of essentially three parts: a stiffening ring which fits over an outer surface of the heart valve; a knit fabric sewing cuff attached to the stiffening ring, and a locking ring for securing the stiffening ring to the heart valve. The preferred embodiment comprises a locking ring which is generally crescent-shaped in cross-section and has a split ring configuration. Radial expansion or contraction is a first mode of deformation for the locking ring. The stiffening ring and the valve body can be locked together because the locking ring is capable of deforming in a second mode with respect to thickness of the ring. In the case of the preferred embodiment, the locking ring deforms by a slight flattening of the cresent cross-section of the ring.
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