Which sign is least likely to be observed in a case of arterial embolization?

The sign that is least likely to be observed in a case of arterial embolization is claudication. Claudication usually refers to pain caused by inadequate blood flow to the muscles during activities like walking or exercising and is a symptom associated with chronic arterial disease. It generally arises from gradual narrowing of the arteries rather than an acute obstruction, which is characteristic of embolization.

In contrast, arterial embolization typically leads to a sudden disruption of blood flow to the affected area, creating more acute symptoms. A sudden onset of pain is a common immediate reaction due to the rapid loss of blood supply. Blue toes (cyanosis) can occur due to compromised circulation, and pallor or white extremity is often observed when blood flow is significantly reduced or absent. These symptoms are indicative of acute limb ischemia, which directly correlates with arterial embolization events. Therefore, claudication is the least relevant symptom in the context of artery embolization.