What is the primary use of a nasogastric (NG) tube?

The primary use of a nasogastric (NG) tube is to provide nutrition or medication directly to the stomach. This tube is inserted through the nose, down the esophagus, and into the stomach, allowing healthcare providers to deliver essential nutrients and medications directly to patients who may be unable to eat by mouth. This is particularly beneficial for patients recovering from surgery, those with swallowing difficulties, or individuals with certain medical conditions that impair their ability to ingest food normally. The direct delivery of nutrition helps in maintaining the patient's nutritional status and aids in their overall recovery process.

The other options are unrelated to the purpose of an NG tube. An NG tube does not facilitate oxygen delivery, administer anesthesia, or monitor heart rates; these functions are served by other medical devices and methods.