Review Question - QID 6772

Figures 42a through 42c show the clinical photographs and radiograph of a patient with diabetes mellitus who lives independently. The patient was admitted to the hospital late yesterday afternoon with clinical signs of sepsis. Parenteral antibiotic therapy resolved the sepsis, and blood glucose levels are now well controlled. The patient has no palpable pulses. The ankle-brachial index is 0.70. Laboratory studies show a WBC count of 8,500/mm³, a serum albumin of 1.9 g/dL, and a total lymphocyte count of 1,500/mm³. What treatment has the best potential to optimize his survival and independence?