Success rate of cecal intubation, endoscopist's difficulty, and procedure-related patient pain are still problems for beginners performing colonoscopy. New methods to aid colonoscopic insertion such as warm water instillation and oil lubrication have been proposed. The aim of this study is to evaluate the feasibility of using warm water or oil in colonoscopy.
Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University Anam Hospital, Institute of Digestive Disease and Nutrition, Korea University College of Medicine, Seongbuk-gu, Seoul, 136-705, Korea.