NPO is a medical term for "nothing but oral" also know as "mouth". When undergoing anesthesia, it is very important that you child follow the fasting guidelines established by the American Society of Anesthesiologists. If your child does not follow NPO guidelines, their procedure will be postponed or canceled.
Your child cannot eat after midnight (12am), because if their stomach is not empty, your child may vomit and some of their stomach contents may get into their lungs. Please ensure your child also avoids hard candy and chewing gum.