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''Ankle Brachial Pressure Index''
divide ankle BP by arm BP at rest and at exersize
used to evaluate those with suspected PAD and to check for PAD pre venous ulcer compression bandage Rx

 >1.2 - calcified stiff arteries - advanced age or PAD
normal = 1 - 1.2 but 0.9-1 is acceptable
 <0.9 - PAD likely
 <0.5 - PAD severe and needs urgent referral
 >0.8 - considered safe for compression bandaging

If >1.3 - artefactual (calcified arteries - diabetes, CKD, elderly) - use toe brachial or other index

''note''
''thromboangiitis obliterans'' - young men smoke jewish - cold periphery, ischaemic ulcers in digits, superficial migratory thrombophlebitis
''Takayasu's arteritis'' - occulsive polyarteritis - young females, asian - neck bruits, absent arm pulses, TIA, visual disturbances