The method of venting the anal canal is mainly divided into two types: massage venting method and enema venting method. Massage exhaust method is mainly to let the patient lie down or adopt a more comfortable position, the massager in the hands after rubbing warm gently from the patient’s upper abdomen, into clockwise or counterclockwise continuous pressure on the abdomen. Side pressure, while instructing the patient to do deep breathing, deep inhalation, can promote the continuous peristaltic movement of gas in the intestine, so that the gas slowly from the anal canal out of the body. Enema venting is mainly done by applying lubricant to the anal tube and then slowly inserting it through the anus into the rectum. Due to the action of the local lubricant, it can promote the discharge of feces and secretions in the rectum, thus allowing the gas in the anal canal to be expelled from the body. The anal venting method is only applicable to patients with relatively low rectal and obstruction position, and this method is not applicable to patients with high obstruction.