4.07.2013

Calculating and Interpreting ABI

http://www.strokescaninc.com/abi.htm
First things first...
What does ABI stand for? 

Ankle-Brachial Index

What arteries are you examining?

Brachial and Dorsalis pedis

How do calculate ABI?

R ABI = highest avg ankle pressure (R dorsalis pedis)/ highest avg arm pressure (either arm)
L ABI = highest avg ankle pressure (L dorsalis pedis)/ highest avg arm pressure (either arm)




http://www.mayoclinic.com/health/medical/IM04412
How do you interpret the #s?

ABI                     Interpretation
>0.90                   Normal LE flow
<0.89 - >0.60      Mild PAD
<0.59 - >0.40      Moderate PAD

<0.39                   Severe PAD

















See more about the technique of gathering ABI data in an older ABI post of mine...



Source: Bates Pocket Guide of Physical Examination 6th Ed

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