Patients with phlebographically confirmed deep vein thrombosis of the calf 

For the first 6 h following surgical repair of a leaking abdomi- nal aortic aneurysm in a 70-year- old man, oliguria (total urinary output of 25 mL since the operation) has become a concern. Of most diagnostic help would be 

Following aortic reconstruction, the viability of the sigmoid colon can most reliably be evaluated by 

A 25-year-old woman presents to the emergency room complaining of redness and pain in her right foot up to the level of the midcalf. She reports that her right leg has been swollen for at least 15 years, but her left leg has been normal. On physical examination she has a temperature of 39°C (102.2°F). The left leg is normal. The right leg is not tender, but it is swollen from the inguinal ligament down and there is an obvious cellulitis of the right foot. The patient’s underlying problem is