Q: What does blue Toe syndrome on clinical exam means?


Answer:  The blue toe with preserved pulses should raise the strong suspicion of embolic occlusion of the foot arteries, and should raise the alarm as it may be a herald symptom of more severe, future embolic events, which may threaten the whole limb. 



Reference:

Karmody AM, Powers SR, Monaco VJ, Leather RP. "Blue toe" syndrome. An indication for limb salvage surgery. Arch Surg 1976; 111:1263.