Femoral artery thrombosis
Known case of peripheral vascular occlusive disease.
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Diffuse calcification of all the lower limb arterial tree. Spectral broadening with biphasic pattern in the common femoral artery. Complete occlusion of the proximal 2/3 of superficial femoral artery.
Distal third reformed weakly by deep femoral artery collaterals.
Monophasic low velocity flow seen in the popliteal and all infrapopliteal vessels.
This case demonstrates a long segment thrombotic occlusion of the proximal 2/3 of the superficial femoral artery. Deep femoral arterial collaterals always tend to reform at the terminal third of femoral artery. The alteration in pattern to monophasic flow confirms a significant proximal occlusion.