Abstract: Objective To compare the clinical application of one-man and two-men colonoscopy. Methods 1 112 patients were separately examined with the technique of one-man and two-men colonoscopy from May 2013 to May 2014. The indicators of the rate of reaching ileocecum, inserting time, colonoscopy length, pain score and polyp rate of missed diagnosis were compared. Results The rates of reaching ileocecum of the routine technique of one-man and two-men colonoscopy were 98.42% and 93.23% respectively. The average inserting times of the two methods were 5.51±3.22 min and 11.54±3.83 min respectively( P<0.05). Colonoscopy lengths of the two methods were 71±17cm and 89±22cm respectively( P<0.05). The pain scores by the NRS questionnaire of the two methods were 2.69 ±1.60 and 6.82±2.14 respectively( P<0.05). Polyp rates of missed diagnosis were 11.82% and 20.13% respectively ( P<0.05). No serious complications were observed in all examinations. Conclusion The technique of one -man colonoscopy has a high success rate. Compared with two-men colonoscopy, one-man colonoscopy has a shorter inserting time, and colonoscopy length, which reduces the patients pain, polyp rate of missed diagnosis and endoscopic loss.

Key words: colonoscopy, one-man colonoscopy, two-men colonoscopy