Prospective Randomized Controlled Trial Comparing Water and Air Colonoscopy in a Community Based Setting

"We will turn off the air pump. The colonoscope will be inserted into the rectum and gently advanced. We will suction air pockets as scope is advanced towards the cecum. Water will be infused when encountering closed up lumen. All the infused water will be suctioned out. We will use all other techniques used with conventional air method as needed. For example abdominal pressure, shortening of scope to reduce looping, change of patient position etc.~We will turn on air pump once cecum reached, or if unsuccessful with water method to open up a close lumen or to go past a tight turn.~On withdrawal we will continue air insufflation as needed, and closely examine for polyps and remove all visualized polyps. If there is any residual fluid, it will be suctioned out as the scope is withdrawn."

Air will be infused into the colon during colonoscopy.