I don't believe the concept of "reactive hyperemia" was mentioned in
this thread. We were doing a lot of these intraoperative studies from
1990- 1994 and found many elevated flow velocities in the
endarterectomized ICAs attributed to this.
Tom Rosendahl, RN BS RVT
Cedars-Sinai Medical Center
Los Angeles, CA
-----Original Message-----
From: UVM Flownet [mailto:[log in to unmask]] On Behalf Of Norman
Paley
Sent: Thursday, July 01, 2010 6:47 PM
To: [log in to unmask]
Subject: Re: Intra operative carotid duplex velocities after
endarterectomy
The surgeon in question does usually create a patch. They generally
seem to be of the relatively "tight" variety, however. Nevertheless, it
could still affect the velocity profile.
Thank you all for the interesting replies.
Norman Paley, BS, RVT
Technical Director Vascular Laboratory
Richmond University Medical Center
Staten Island, New York
Jun 29, 2010 09:50:14 PM, [log in to unmask] wrote:
===========================================
Within the past year we have begun doing intra operative duplex
ultrasound
evaluation of the carotid artery immediately after completion of carotid
endarterectomy. Our experience has been that, although, the lumen of
the
vessel looks fine after the procedure, the peak systolic velocities have
tended to be relatively low. My thought on this is that the artery, now
stripped of its fascia and surrounding tissues, is able to dilate more
easily with each pulse of blood going through it resulting in a lower
peak
velocity at a given volume compared with its unoperated state. Does
anybody have any experience with intra operative ultrasound during
carotid
endarterectomy and, if so, do you find similar, or any differences in
the
velocities? Thank you in advance for any replies.
Norman Paley, BS, RVT
Technical Director Vascular Laboratory
Richmond University Medical Center
Staten Island, New York
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