What is the recommended minimum flush volume for an adult nasoenteric tube before and after feeds and after medication administration?

• A. 30-50 mL
• B. 10-15 mL
• C. 60-100 mL
• D. 5-10 mL

Answer: (A)

Maintaining the tube’s patency relies on flushing with enough liquid to clear the lumen of residues and to push any remaining feed or medication into the stomach or intestine. For an adult nasoenteric tube, the minimum amount used before starting a feed, after finishing a feed, and after administering medications is typically around 30 mL of water, with many practices allowing up to 50 mL. This range is enough to reliably clear the tube and reduce clogging risk without overloading the patient with fluid. Using only 5–10 mL or 10–15 mL is usually insufficient to clear the lumen and protects against occlusion, while flushing 60–100 mL is more than necessary for a routine flush and could pose unnecessary fluid overload in some patients. Therefore, 30–50 mL is the standard recommended range.