Figure 1

Quick Poll

A 44-year-old male with a history of chronic obstructive pulmonary disease and chronic periodontal infections presents with numbness and tingling of the fingers. On examination, his fingers are violaceous, mildly edematous, and cool to the touch. An arteriogram demonstrates segmental digital occlusions. He has no past history of thrombosis or atherosclerotic disease. Which of the following is the most important step in managing this patient? Image credit: @chiefmd.