A stomach pump, also known as gastric lavage, is a medical procedure used to remove the contents of the stomach. It is often performed in cases of poisoning or overdose, where the ingested substance could be harmful. A tube is inserted through the mouth or nose into the stomach, and saline solution is used to flush out the stomach's contents. This procedure is typically done in a hospital setting by trained medical professionals. While it can be life-saving, it is not always appropriate for every situation, and its use depends on factors such as the type of substance ingested and the time elapsed since ingestion.