Comparing Cap-assisted Water Exchange and Water Exchange in Colonoscopy

A Randomized, Controlled Trial Comparing Cap-assisted Water Exchange and Water Exchange in Colonoscopy

This prospective, randomize, controlled trial will compared cap-assisted water exchange with water exchange in patients undergoing sedated colonoscopy. Investigators test the hypothesis that that cap-assisted water exchange is more efficient and causes a shorter insertion time.

Inclusion Criteria:

• Patients undergoing fully sedated colonoscopy performed by the investigators

Exclusion Criteria:

• obstructive lesions of the colon
• massive ascites
• history of partial colectomy
• provide written informed consent