Koven Technology Canada Inc.
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Ankle Brachial Index (ABI)

The Ankle Brachial Index (ABI) is a simple non-invasive vascular study commonly used to diagnose Peripheral Arterial Disease (PAD). The ABI uses an ultrasound Doppler to determine the ratio of the highest systolic pressure at the arm to the systolic pressure at the ankle. A lower systolic pressure ratio at the ankle may indicate the presence of PAD.

Using a noninvasive vascular Doppler, systolic pressures are taken at both arms, and at the posterior tibial and dorsalis pedis arteries on each leg by inflating pressure cuffs past the point where Doppler sounds cease, then slowly deflating the cuffs until Doppler sounds return.

The ABI is calculated by dividing the ankle pressure by the highest arm pressure. A lower systolic pressure gradient at the ankle may indicate a vascular condition.  An ABI of 1.0 - 1.4 is generally considered normal.¹

Ankle Brachial Index studies can be easily performed using any of Koven's noninvasive vascular Dopplers shown below.

Ankle Brachial Index

The ABI is calculated by dividing the ankle pressure by the highest arm pressure. A lower systolic pressure gradient at the ankle may indicate a vascular condition.  An ABI of 1.0 - 1.4 is generally considered normal.¹

Ankle Brachial Index studies can be easily performed using any of Koven's noninvasive vascular Dopplers shown below.

¹ Creager MA, et al. (2011). 2012 ACCF/AHA/ACR/SCAI/SIR/STS/SVM/SVN/SVS Key Data Elements and Definitions for Peripheral Atherosclerotic Vascular Disease: A Report of the American College of Cardiology Foundation/American Heart AssociationTask Force on Clinical Data Standards (Writing Committee to Develop Clinical Data Standards for Peripheral Atherosclerotic Vascular Disease). Circulation 2012, 125:395-467. Retrieved December 5, 2011 from http://circ.ahajournals.org/content/125/2/395.

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