Abstract: A sanitary, disposable, gastric lavage closed system is disclosed that quickly and effectively flushes material from a patient's stomach. The system includes an elevated, plastic reservoir bag connected through a feed line having a specified bore range, to a T-connection. A gastric tube is fitted to the T-connection and is adapted for insertion into the patient's stomach. A fixed volume of liquid from the reservoir bag is admitted to the patient by pump or by hand control of the feed line over a short, measured period of time.Material in the patient's stomach is then quickly removed into a disposable container that forms a closed system with the rest of the components.An injection syringe may be employed to inject treatment materials into the stomach, remove test samples, and maintain the system free of clogged material.An attachment for colonic irrigation and enemas may be employed to replace and/or by-pass the gastric tube.