Method for cryopreserving heart valves
US4890457A · kind A · utility
26Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1987 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Jan 2, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/27
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of freezing, storing and thawing collagen-rich tissue, such as heart valves. The method includes a freezing profile for freezing the tissue down to the temperature of liquid nitrogen with minimal tissue damage due to ice crystal formation. Heart valves cryopreserved according to the present process exhibit a high cell viability when thawed and are suitable for implanting in human patients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.