I think it's important to know whether the criteria that you are
requesting is from studies that have used the "NASCET" percent luminal
reduction or the "bulb" method, sometimes referred to as European
carotid Surgery Trial or ECST. The former uses the ICA diameter distal
to disease at the denominator, the latter uses the estimated diameter at
the point of max stenosis. A 60 percent stenosis via NASCET is quite
different from a 60 percent stenosis measured with the bulb method. For
example the old "Bluth" criteria used PSV >125 cm/sec for a 60% ICA
stenosis "bulb method"). Moneta's criteria for 60% stenosis (via the
distal ICA method) is PSV > 270 cm/s & EDV >70 cm/s.
From: nnnn Landa M. Basham [SMTP:[log in to unmask]]
Sent: Wednesday, April 26, 2000 11:27 PM
To: Robd; UVMFLOWNET
Subject: Carotid Stenosis Criteria
Our lab is discussing new criteria for reading and categorizing stenosis
extracranial studies (in effect velocity vs ICA/CCA ratios).
My medical director wanted to post this question: What criteria are
labs using to identify 60% stenosis in the ICA, 70% stenosis, and 80%
stenosis? Any input would be greatly appreciated.
By the way, the lab is accredited and has been recently reaccredited...we
just have new readers wanting to bring in new diagnostic criterion.
Landa M. Basham