just asking what syst & dias. criteria you all use for diagnosing subclavian artery stenosis ( based on the subc. art. signal itself......in addition to the vertebral art. findings )? 

what is the normal velocity range of the subc. arteries?
what are the abnormal ranges? 

is there a standard/recommended segment of the subc. art. one should consistently sample....given the acute angle of the prox. segment of this artery?

it's easy to find ICA stenosis criteria, but not quite so for subc. art. stenosis.

thanks!

robin



 -------------- Original message ----------------------
From: Peter Richard <[log in to unmask]>
> We recently did a study evaluating this very problem. 
>  
> Journal for Vascular Ultrasound <http://mail.pvasatx.com/content/svu/jvu> , 
> Volume 31, Number 3, September 2007 , pp. 149-151
> "Using ABI alone for screening in a population with a high incidence of diabetes 
> is significantly limited because of noncompressible ankle pressures caused by 
> arterial calcification....The prevalence of PAD, detected by Doppler waveform 
> analysis in the segments with non-compressible ankle pressures, was 69%. 
> Additional modalities such as Doppler waveform analysis would further increase 
> the accuracy of screening for PAD in this population. Alternately, using the ABI 
> alone for the detection of PAD can be improved by interpreting ABIs greater than 
> 1.2 as positive results because of the high prevalence of PAD in this group."
>  
> So in a nut shell, use waveform analysis in patients with noncompressible 
> arteries. 
>  
> Peter M. Richard, BS, RVT
> Peripheral Vascular Associates
> San Antonio, Texas
> 
> ________________________________
> 
> From: UVM Flownet on behalf of Barb Lemon
> Sent: Thu 12/20/2007 2:18 PM
> To: [log in to unmask]
> Subject: Noncompressible ABI's and screening
> 
> 
> 
> For those of you that do free ABI's for screening purposes, how do you
> report those patients who are non compressible?   Is there a non
> diagnostic component to the report?  Do you also report on the Doppler
> sound ( monophasic )?  We are scheduled to screen at a diabetes fair
> soon, any help is as always greatly appreciated  Thanks Barb.
> 
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