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Review Question - QID 5485

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QID 5485 (Type "5485" in App Search)
A 49-year-old construction worker presents with pain in his small finger for 2 months. Figure A shows the Allen's test on the involved hand. An arteriogram is obtained and is shown in Figure B. Following a period of rest and activity modification, he returns 1 month later with ulceration at the tip of his small finger. At this point, a color flow doppler ultrasound image of the ulnar artery is shown in Figure C. The digital brachial index is 0.4. What is the next best step?
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