At a place I used to work, we used acceleration time as an indicator,
but more recently, especially in cases of occluded SFA or tandem
lesions,  there are prolonged accel times and monophasic waveforms
present due to distal disease processes.


 I have been using deceleration times instead. Distal to a stenosis, the
decal slope tends to prolong and has been more helpful to me in
determining during a LE study that has SFA disease as well.  This is
much like the prolonged phases you see in mitral stenosis (to compare it
to echo). 


Kelly Estes, RVT, RDCS, RDMS 


From: UVM Flownet [mailto:[log in to unmask]] On Behalf Of Kemil
Sent: Monday, May 17, 2010 9:34 AM
To: [log in to unmask]
Subject: Re: Regarding Acceleration rate in lower extremity arteries


I have used acceleration rate for a number of years and have found it
very useful at the common femoral artery level when trying to determine
the presence of significant proximal stenosis, ususally in the iliacs
either common or external.  The criteria I used was generally around
150ms for definitive.  Also useful is to note whether there is a
significant difference between both legs.  Will check my library for
reference.  Of course, it the waveform is monophasic, it trumps the


Kemil Pilotte, RVT, RDCS, BS

Cardiovascular Sonographer

On Thu, May 13, 2010 at 10:18 AM, Carla Stanley <[log in to unmask]>

Is there anyone out there that is using acceleration rate criteria in
lower extremity bypass graft/endovascular revascularization duplex
surveillance in conjunction with ABIs and velocity ratio criteria??? I
remember a couple of years ago a group was taking acceleration rates in
the common femoral artey to determine inflow disease, however I have
forgotten the standard way of doing that. Is there a protocol that would
suggest severity of disease? If anyone knows of any article pertaining
to this please send it my way! :)

Thanks and have a great weekend!
Carla Stanley, RVT
Comprehensive Vascular Care
Dalton,Ga 30103

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