One more "old dog" here--we videotape everything we do on the duplex system.
If there is any question about the dynamics of flow we have the "real thing"
to view.  We also hard copy for the chart--and for the most part that's all
the docs look at--but I figure if the study is done in real time it needs to
be recorded that way.  Just in case--must be the old nurse in me--"if it's
not documented it didn't happen".  So far we have kept the tapes ad
infiniti--but then I have moved to a new job about every 3 years for awhile
now so don't know how long they keep them after I leave.  (Staying put now
for while I think!!)
EJ Niemi RN RVT
The Southeastern Heart & Vascular Center
Greensboro, NC   Fax 336-954-9151