Duplex Ultrasound and Ocular Pneumoplethysmography Concordance in Detecting Severe Carotid Stenosis.

Publication/Presentation Date

5-1-1989

Abstract

Concordance between two independent tests should serve to increase the accuracy of diagnosis. A combination of ocular pneumoplethysmography and duplex ultrasound, which uses high-resolution B-mode imaging plus spectral analysis, was used to evaluate 289 consecutive patients prior to biplane carotid angiography. Where there was concordance, the noninvasive tests predicted the presence or absence of hemodynamically severe carotid stenosis (75% or greater cross-sectional area reduction) with a sensitivity of 96.8%, a specificity of 95.9%, an accuracy of 96.2%, and positive and negative predictive values of 91.0% and 98.6%, respectively. Of the 538 study arteries, only four (0.74%) angiographically severe lesions escaped detection by both noninvasive tests. Sources of diagnostic error for both tests were defined. We believe that the combination of duplex ultrasound and ocular pneumoplethysmography significantly improves the overall assessment of carotid atherosclerosis.

Volume

46

Issue

5

First Page

518

Last Page

522

ISSN

0003-9942

Disciplines

Medical Sciences | Medicine and Health Sciences

PubMedID

2653291

Department(s)

Department of Medicine, Department of Medicine Faculty

Document Type

Article

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