Abstract
Experiments were carried out to establish the technique of cryopreservation of animal blood vessel. Blood vessels taken out from rats, swine and dogs were used. Blood vessels of rats, which had been preserved in liquid nitrogen from 2 weeks to 16 months, were allografted to rats' abdominal arteries. 8 rats out of 32 survived more than a week. Observation of the grafts taken out again from these rats were in good condition without any pathological problem.
