Classification ■Colonic obstruction ■Dilated colon only Dilated small bowel (incompetent ileo-cecal valve) Gas-fluid levels distal to hepatic flexure (fluid is normal in cecum and ascending colon) Cecum most dilated portion (>10cm will be critical) Classification ◼ Colonic obstruction ◼ Dilated colon only ◼ Dilated small bowel (incompetent ileo-cecal valve) ◼ Gas-fluid levels distal to hepatic flexure (fluid is normal in cecum and ascending colon) ◼ Cecum most dilated portion (>10cm will be critical)