“…The timing and the type of surgical procedure are of paramount importance, and depend not only on the nature and extent of the disorder necessitating hospitalization, but also on the surgeon's clinical astuteness and judgment. Foldes (62) classifies operations into four groups according to the urgency entailed: (a) true emergency operations such as those for uncontrollable hemorrhage or embolus, (b) early operations, after initial corrective treatment, such as those for acute cholecystitis (63) or intestinal obstruction (64, 65), (c) necessary operations (no emergency) such as those for malignancy, and (d) elective operations, such as those for hernia. Only the last three types are under consideration here.…”