<prompt> Duodenal blow out following Billroth gastrectomy most commonly occurs on which day:2nd day4th day6th day12th day  <response>: Ans. b4th dayRef: Shackelford 7th Edition, Page 930, 944 Most common on 4th to 7th postoperative day. No need to do surgery immediately. Only USG-guided drainage is enough. Most of them settle by maximum 1 month. 