<prompt> Which of the following causes Adynamic intestinal obstruction?Gall stonesBandsIntussusceptionParalytic ileus  <response>: Ans: D Paralytic ileus Ref: The Washington Manual of Surgery, 6th edition, Bailey and Loves Short Practice of Surgery 25th Edition Schwartzs Principles of Surgery, 9th EditionExplanation:Intestinal obstructionDefn: Lack of transit of intestinal contentsClassification according to pathology Dynamic: Where peristalsis is working against a mechanical obstructionAdynamic: Where there is absence of peristalsis without obstructionAbsent peristalsis eg: Paralytic ileusNon-propulsive form ef: Mesenteric vascular occlusion. Pseudo-obstructionCauses of Dynamic Intestinal ObstructionIntraluminal causesImpacted stoolsForeign bodiesBezoarsGall stonesAscariasisMeconium ileusIntramural causesAtresiaInflammatory stricture - TB, Crohns diseaseMalignant stricture - Ca Colon, GISTExtramural causesIntraperitoneal bands and adhesionsHerniaVolvulusIntussusception 