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X-ray of left upper limb shows a hairline nondisplaced radial head fracture. The nurse asks you to prescribe more painkillers as the patient is still in severe pain.
Physical examination: the patient is holding her left upper limb in elbow flexion, there is no arm swelling, there is tenderness from elbow down to fingers, the left forearm is cold compared to right forearm and the radial pulse is feeble.
What will be the next action?
CT Angiogram shows multiple arterial clots, the largest of which is in the left subclavian artery.
She has an urgent left arm embolectomy. A few hours later she develops severe left forearm pain worse with passive extension, left upper limb swelling and a tingling sensation.
What is the most likely diagnosis?