✦ LIBER ✦

Limitations in the Accuracy of Peak Frequency Measurements in the Diagnosis of Carotid Disease

✍ Scribed by M. Lally; K. W. Johnston; PhD R. S. C. Cobbold

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 622 KB
Volume: 12
Category: Article
ISSN: 0091-2751
DOI: 10.1002/jcu.1870120705

No coin nor oath required. For personal study only.

✦ Synopsis

Peak Doppler frequency is an index of the severity of carotid stenosis. Variability in this measurement is examined through in vitro and clinical studies. In vitro studies, using a carotid flow model, show that observers locate a stenosis and interpret the peak frequency differently, and each observer uses a different probe-vessel angle. Clinical studies support these findings. Comparison of 304 carotid Doppler studies with arteriograms demonstrates 90% overall clinical accuracy. Each observer has a consistent range of peak frequency measurements, yet the description of a discrete percent stenosis is limited by observer variability.

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