The patient with least risk of pulmonary aspiration of gastric contents during induction of anesthesia is:-
Markedly obese and NPO for eight hours
Fed coffee four hours before elective surgery
Scheduled for elective cesarean delivery and NPO for 20 hours
NPO for four hours after a full meal
NPO is same for obese and normal. NPO guidelines - 6hrs for liquid and semisolid, 2 hours NPO for clear fluids. Subset of patients who are at high risk for aspiration - pregnant women, morbidly obese (rapid sequence induction), full fatty meal - 8 hours NPO.
JIPMER 2019