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
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 criteria.
Kemil Pilotte, RVT, RDCS, BS
On Thu, May 13, 2010 at 10:18 AM, Carla Stanley <[log in to unmask]> wrote:
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
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