Thanks, I have pulled this article and added it to my venous insufficiency file.

I do mean file, this topic has been bounced around for a long long time.


Jack I.  Siegel, BA RVT
Technical  Director
Vascular Surgery
Dartmouth  Hitchcock Medical Center,  NH
Veterans Administration Medical  Center,   VT

--- You wrote:
The issue of reflux time has been around for decades.  I have seen 1 sec, 2 sec and 3 sec used as a cutoff time for normal, but little in the formal research arena.  
This reference might help; 
Labropoulos N, Tiongson J, Pryor L, et al.  Definition of Venous Reflux in Lower Extremity Veins.  J Vasc Surg. 2003; 38: 793-798.  Their cutoff values for "normal" subjects were <500 ms in superficial veins and calf veins, <350 ms for perforators, and <1000 ms for femoropopliteal veins. Longer duration of reflux was observed in supine subjects than standing subjects.  
If you are going to use this reference, I would strongly suggest reading the entire article.  
And of course, if the Valsalva maneuver or manual compression is not adequate, reflux measurements are pretty useless.
Bill Johnson, RVT, FSVU


From: UVM Flownet on behalf of Lygia Waters
Sent: Wed 1/30/2008 9:45 AM
To: [log in to unmask]
Subject: Venous insufficiency

Help!  We started doing venous insufficiency exams along with a normal venous doppler,(e.g. we scan the patient's GSV, LSV and for perforaters while they are standing)
What we can't find is any definite grading scale for venous reflux.   At a previous job, the vascular surgeon used >2sec of reflux = significant reflux.  However, i can't find that published anywhere, or any other table or literature that grades the severity of the reflux as found on ultrasound.
Can anyone helP?
Thanks!  L. Waters, RVT
P.S. I love this forum!!!! So useful!


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