Whether GI hypomotility simply slows the normal release of gas and feces or results in paralytic ileus, inserting a rectal tube may relieve the discomfort of distention and flatus. Decreased motility may result from various medical or surgical conditions, certain medications (such as atropine), or even swallowed air. Conditions that contraindicate using a rectal tube include recent rectal or prostatic surgery, recent myocardial infarction, and diseases of the rectal mucosa.