We do not measure segmental pressures when the ABI is normal, provided
that the ipsilateral tibial Doppler waveform is normal.  In my
experience, a normal ABI in conjunction with an abnormal waveform
suggests an element of wall stiffening, (likely with an ABI >1.4 or when
an ankle systolic pressure is >60mmHg above the higher brachial.)  Also,
if requiring only to determine if PAOD affecting the lower extremity
is/is not present, it is not necessary to exercise a patient who has an
ABI <0.8.

 

Terry N.

 

Terry Needham

Heart & Vascular

Erlanger Health System

423-778-5839

PLEASE  NOTE MY NEW EMAIL ADDRESS

[log in to unmask]

 

-----Original Message-----
From: UVM Flownet [mailto:[log in to unmask]] On Behalf Of Laura
Sikkenga
Sent: Thursday, October 13, 2005 12:39 AM
To: [log in to unmask]
Subject: ABI questions from curious student

 

Hello, I am a vascular ultrasound student. Our class is having a
discussion about ABIs and segmental waveforms/pressures. We understand
that many labs start with just ABIs and stop if they are normal. If they
are abnormal, they will continue on to complete segmental waveforms and
pressures.

I am wondering what the consensus is among professionals, about these
questions: Is there an advantage, for the patient (or the lab,) to
perform the segmental pressures if the ABIs are normal? Or, what is the
rationale/justification for only using ABIs when they are normal? Are
normal ABIs going to be definitive in every instance?

Thank you for your consideration,

Laura Sikkenga
Jackson Community College
-- 
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