Scheduled repeat endoscopy at 24 hour intervals have been used to detect and retreat any remaining stigmata11. Such a policy also subjects many patients to unnecessary endoscopy and treatment but has not been shown to improve outcome. Re-endoscopy at 24-hour intervals misses rebleeding that occurs in the interim, but repeated endoscopy at closer intervals is impractical. Some authors has suggested combining clinical endoscopic data in a scoring system to select patients for repeat endoscopic re-treatment, and demonstrated improved outcome in a small series. Others have used Doppler signals in arteries in the ulcer base to predict failures of endoscopic treatment.