Key result
Doppler examination of 356 carotid bifurcations yielded 50 diagnostic errors, with a higher error rate for occlusion (30 false vs 31 true) than for significant stenosis (20 false vs 89 true).
Why the study?
What are the sources and frequencies of error in Doppler diagnosis of carotid occlusive disease?
Population
356 carotid bifurcations examined for carotid occlusive disease
Design
Cross-sectional
Authors
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May warrant caution interpreting Doppler for carotid occlusion; leaves open whether adjunct techniques reduce errors in this Level 4 analysis.
Observational (n=356)
What are the sources and frequencies of error in Doppler diagnosis of carotid occlusive disease?
Doppler examination has a higher error rate in diagnosing carotid occlusion compared to stenosis, which could potentially be mitigated by using additional noninvasive techniques.
Zwiebel et al. (1981) conducted an observational in Carotid occlusive disease (n=356). Doppler examination was evaluated on Diagnostic errors (false-positive or false-negative). Doppler examination of 356 carotid bifurcations yielded 50 diagnostic errors, with a higher error rate for occlusion (30 false vs 31 true) than for significant stenosis (20 false vs 89 true).
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