Patient should be kept nil orally for:

for adults 6 hours for liquids and semisolids 8 hours for fried, fatty food Recommended Preoperative Fasting period for neonates and infants are 6 hours for solids/formula feeds/cow's milk 4 hours for breast milk Recommended Preoperative Fasting periods for all above 1 year of age are 2 hours for clear fluids 4 hours for breast milk 6 hours for light meal 8 hours for fried, fatty food For clear fluid new clinical Study has recommended for liberal approach and 2hrs is upgraded to 1 hr. If type of food is not specified NPO status should be 6 hrs.