The results of transplantation survival for 70 consecutive cadaver kidneys preserved under hypothermic pulsatile perfusion at Henry Ford Hospital are reviewed. Pulsatile perfusion for up to 30 hours did not adversely alter the survival rate following transplantation. Thus, kidneys perfused for prolonged periods of time (\u3e 20 hours) can be used for transplantation, if the basic rules for organ retrieval and preservation have been followed. Hypothermic pulsatile perfusion of cadaver kidneys has been demonstrated to be an adequate system for ex-vivo preservation for transplantation