66 y.o. male had sigmoid resection for carcinoma @ 3:00 pm. He was fed immediately for 17 hours via a double lumen, nasoduodenal catheter @ 100 kcal/hr. At 8:00 am the tube was removed, and BaSO4 swallowed. Serial X-rays indicate normal motility. 12:00 noon – 4 hour motility study, 21 hours after surgery.