Comparing Maximal and Half-maximal Suction Pressure Applied During Water Exchange in Colonoscopy

A Randomized, Controlled Trial Comparing Maximal and Half-maximal Suction Pressure Applied During Water Exchange in Colonoscopy

This prospective, randomize, controlled trial will compared maximal to half-maximal suction pressure applied during water exchange in patients undergoing minimally sedated colonoscopy. We test the hypothesis that maximal suction pressure is more efficient and causes shorter insertion time.

Inclusion Criteria:

• Patients undergoing minimally sedated colonoscopy performed by YHH

Exclusion Criteria:

• known history of obstructive lesions of the colon,
• allergy to meperidine,
• massive ascites,
• past history of partial colectomy, or
• refusal to provide written informed consent.