RESUMO
OBJECTIVE: To evaluate the satisfaction and performance of water colonoscopy and gas colonoscopy. METHODS: 240 continuous cases were randomly divided into two groups(gas colonoscopy group, water colonoscopy group). Record the general condition, success rate, period of performance and abdominal pain score. Investigate the degree of abdominal pain, distension and the will of receiving anesthetic colonoscopy next time in the follow-up. RESULTS: There were no significant difference between two groups in the general condition, success rate, depth of insertion, abdominal pain after examination or the will of receiving anesthetic colonoscopy next time(P>0.05). The period of insertion, period of withdrawal and period of performance in water colonoscopy group was longer than those in the gas colonoscopy group(P<0.001, P=0.013, P<0.001). The degree of abdominal distension at 1 hour after colonoscopy in water colonoscopy group was higher than those in the gas colonoscopy group(P<0.001), but no significant difference was found at6 hours after examination. CONCLUSION: Patients undergoing water colonoscopy have better outcomes with less abdominal pain and abdominal distension except for longer time of performance.