What does NPO stand for, and what are the common fasting instructions prior to procedures?

• A. Nothing by mouth; no solids or liquids for a specified period pre-procedure, typically 8-12 hours, unless directed otherwise; water may be allowed in some cases.
• B. NPO means nothing by mouth only during the procedure.
• C. NPO means no food for 24 hours.
• D. NPO is a type of anemia.

Answer: (A)