An 84-year-old man is admitted to hospital for a 2-day history of severe generalized abdominal pain. He has long-standing type II diabetes managed with insulin. He is afebrile. Pulse is 100. Blood pressure is 110/75. Abdominal examination shows mild, diffuse tenderness to palpation. Serum studies show:
Sodium 140 mEq/L
Potassium 4.2 mEq/L
Bicarbonate 20 mEq/L
Abdominal CT shows thickening of the wall of the small bowel.
Which of the following is the next best step in management?
Colonoscopy
Dopamine
Heparin
Mesenteric angiography
Operative management
