Closed enteral nutrition formulas have a specified hang time after opening; the statement 'closed EN formulas can be safely used for 24-48 hours after opening, depending on manufacturer guidelines' is true.

• A. Not true
• B. Only valid for pediatric formulas
• C. Only valid if refrigerated
• D. This statement is correct

Answer: (D)

Hang time for opened closed enteral formulas is set by the manufacturer and depends on how the product is stored. Once a closed formula is opened, its risk for microbial contamination increases, so using it within the time window specified by the manufacturer is essential for safety. The statement is correct because many closed formulas specify a usable window of about 24 to 48 hours after opening, with the exact duration varying by product and storage conditions (refrigerated vs. room temperature). This is not limited to pediatric formulas, and it’s not solely about refrigeration—some products are acceptable for 24 hours at room temperature, others up to 48 hours when refrigerated. Always follow the specific product guidelines to determine the correct hang time.