How do you verify Gastric tube placement?

Gastric tube placement can be verified through several methods, including auscultation, pH testing of aspirated gastric contents, and imaging techniques like X-rays. Auscultation involves injecting air through the tube while listening for a rush of air in the stomach. pH testing can confirm gastric placement by checking that the aspirated contents have a pH of 4 or lower. For the most accurate verification, an X-ray can be performed to visually confirm the tube's position.