In less than 2 months a patient has a difference in his ABI of >.2, waveforms
look the same from both exams, has anyone else run into this scenerio?
on 10-22-96 BP's R = 146/60 L= Fistula
amplitude 13 mm 25 mm
ankle Pressures 115 134
ABI 0.79 0.92
on 1-9-97 BP's R = 190/80 L = Fistula
amplitude 12 mm 26 mm
ankle Pressures 112 128
ABI 0.59 0.67
I explained that the difference in the index is due to the increase of
brachial artery pressure by 44mmHg for the January exam. It was explained to
me that this is not the reason, as the arm and the leg blood pressures are
relational and does not account for this. (This was by the tech and one of
So, now I am utterly confused..........................if the formula has an
increase in the brachial artery this will decrease the ABI if the ankle
pressure stays the same. I was just going on simple math. How else would
you explain this???????????????
Carol Gallupe RVT RCT
Vascular & Thoracic Assoc.