<prompt> An adult patient with leg pain and gangrene of toe. His ankle to brachial aerial pressure ratio would be less than?10.30.50.8  <response>: 0.3 REF: Sabiston 18th ed chapter 66 ABI Symptoms 1 Normal 0.5-0.9 Intermittent claudication 0.3-0.5 Rest pain 0.3 Gangrene 