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Functional analysis of cryopreserved veins. Preliminary report
K G Brockbank1, T J Donovan, S T Ruby
1CryoLife, Inc., Marietta, GA 30067.
Journal of Vascular Surgery
|January 1, 1990
Summary
Cryopreserved canine veins maintain cellular and tissue functions after thawing, showing promise for vascular tissue engineering and arterial grafting. These findings suggest cryopreservation is a viable method for preserving vein grafts for surgical use.
Area of Science:
- Vascular Biology
- Tissue Engineering
- Cryopreservation
Background:
- Cryopreservation of vascular tissues is crucial for creating tissue banks.
- Understanding the functional integrity of cryopreserved veins is essential for their clinical application.
Purpose of the Study:
- To compare the function of cryopreserved and fresh canine veins.
- To evaluate the suitability of cryopreserved veins as arterial substitutes.
Main Methods:
- Functional assays of endothelium, smooth muscle, and connective tissue.
- Morphometric analysis and cell culture.
- Isometric tension measurements and 3H-proline incorporation.
- In vivo assessment of cryopreserved vein arterial grafts.
Main Results:
- Cryopreservation did not significantly impair endothelial integrity or intimal cell clonogenicity.
- Smooth muscle function remained largely intact, with dose-dependent responses to vasoactive agents.
- Connective tissue retained approximately 43.5% of fresh vein collagen synthesis capacity.
- Cryopreserved vein grafts demonstrated patency and appropriate in vivo histological changes.
Conclusions:
- Cryopreserved veins retain significant cellular and tissue functions post-thaw.
- Cryopreservation does not alter the histological sequence of autologous vein grafting.
- Cryopreserved veins are a viable option for arterial substitution.