Classification location ■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 - location ◼ 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)