It is important to be sure enough blood "hits" the valve leaflets for closure to occur.  It is hard to do that adequately with proximal compression
but a healthy augmentation distally (we use a cuff inflator) will result in enough blood to close them if they function properly.
Ann

From: UVM Flownet [mailto:[log in to unmask]] On Behalf Of Brian Stockard
Sent: Wednesday, March 25, 2009 11:13 AM
To: [log in to unmask]
Subject: Re: One question more pls

Analyzing the reflux after the release of the distal augmentation maneuver is the traditional method in deep veins.  Use the technique that applies the situation.  What is the goal of your study?   Are you looking for DVT?  Is the patient suffering a loss of lifestyle from venous pooling in the legs?   Are you answering the clinical question?  Those should be the overriding considerations.

Brian Stockard

From: subscribe uvmflownet Elizabeth Gault <[log in to unmask]>
To: [log in to unmask]
Sent: Wednesday, March 25, 2009 10:48:31 AM
Subject: Re: One question more pls

At risk of sounding ignorant (which I guess  on this I am) if you do a dist aug, the flow rushes past the transducer and then you measure the flow that goes backward as it normalizes?
     I'm a general sonographer and our RVT does prox compression sometimes holding as long as 3 seconds and then measures the 3 seconds if it refluxes. We use one second.  In my head it seems that is creating a false number.  I guess it doesn't really matter how long, just that it happened.  huh! thanks so much for the input.  E RDMS MI

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