PMC6565917_01
Doppler ultrasound on the ulnar artery. It was found to be dilated, with thickened walls, although with flow present, in the middle third of the forearm (A), while in the distal third (B) there was echogenic material inside the vessel (thrombus) and absence of flow.
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fig1
Distally to the thrombus in the palmar region, flow in the caudal-cranial direction was noted, probably relating to collateral circulation (Fig. 1).
T1-weighted NMR sequences (A), T2 sequences with fat suppression (B), and after injection of contrast medium (C), showing a dilated ulnar artery with high T1 and T2 signal, representing thrombus, and parietal highlighting by means of the contrast, relating to the post-traumatic inflammatory process.
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T1, hypersignal in T2 and parietal highlighting after injection of paramagnetic contrast medium. The ulnar artery was around 5 cm long, with a diameter of 1 cm (Fig. 2).