| 摘要 |
This invention is a pre-trimmed, cryo-preserved homografts and other non-stent bio-prosthetic heart valves having natural tissue sewing rings (14A) formed thereon. The sewing ring (14A) may be formed of a strip of pericardium or other suitable tissue. Material may be captured between the natural tissue sewing ring, and a sub-valvular lip formed on the valve to impart a desired size or shape to the sewing ring. In the case of cryo-preserved embodiments of the invention (e.g., cryo-preserved human homografts) the sewing ring (14A) is attached to the valve by way of a natural tissue suture (34), biological glue or other attachment component that is capable of undergoing cryo-preservation without breaking, excessive weakening, or other changes that prevent it from performing its attachment function.
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