“…In the remaining 4 trials, 1,21,22,24 patients received no NGI at all. In 14 trials, the routinely placed NGI was removed "late," when first flatus passed, 1,4,19,21,25,26,30 bowel sounds returned, 3,27,31 GI functions returned, 24,32 peristalsis returned, 20 or the ileus seemed to be resolved. 2 In 3 trials, the NGI was removed after at least 24 hours 28 or after 3 days.…”