This document discusses various gastrointestinal procedures including nasogastric tube insertion and removal, gastric lavage, gastric aspiration, gastric gavage, and gastrostomy. It defines each procedure, describes its purpose, necessary equipment, potential complications, nursing considerations, and more. Key points covered include how NG tubes are used to administer feedings or remove stomach contents, the types of gastric aspiration, purposes of gastric lavage and gavage, and nursing care for patients with gastrostomies.