A nurse is preparing to administer an enteral feeding to an adolescent who has a nasogastric (NG) tube. Which of the following actions should the nurse take first?

Administering enteral nutrition requires applying the nursing process, specifically prioritizing assessment before intervention. The nurse must utilize safety protocols to ensure the nasogastric tube is correctly positioned within the stomach to prevent life-threatening complications such as pulmonary aspiration or respiratory distress. Choice A rationale Setting the administration rate is an implementation step that occurs after verifying tube placement. While necessary for the feeding process, it does not address the safety priority of ensuring the tube remains in the correct anatomical location. Choice B rationale Flushing the tube with water maintains patency and prevents clogging. However, the nurse should never instill any fluids into the tube until placement is confirmed, as misplaced tubes could deliver water directly into the patient's lungs. Choice C rationale Checking gastric pH is the priority assessment to verify placement. Gastric secretions typically have a pH ≤ 5.0. Verifying acidity ensures the tube is in the stomach before delivering formula, thus preventing accidental pulmonary aspiration. Choice D rationale Attaching the feeding bag to the NG tube is a technical step in the delivery process. This action should only be performed after the nurse has successfully verified tube placement and assessed the patency of the tube.