March 1, 1984Journal of Clinical Ultrasound
Efficacy of CW‐Doppler and Duplex System Examinations for the Evaluation of Extracranial Carotid Disease
Why the study?
How do CW-Doppler and Duplex system examinations compare to angiography for the evaluation of extracranial carotid disease?
Population
Patients evaluated for extracranial arterial disease (EAD)
Comparison
CW-Doppler and Duplex system examinations vs Angiography
Design
Cross-sectional
Authors
Discussion
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Implication
May support CW-Doppler for significant carotid stenosis detection; hypothesis-generating for modality selection pending prospective validation.
Structured PICO
How do CW-Doppler and Duplex system examinations compare to angiography for the evaluation of extracranial carotid disease?
P
Population
Patients evaluated for extracranial arterial disease (EAD)
I
Intervention
CW-Doppler and Duplex system (high-resolution B-scan imaging combined with multigated pulsed Doppler flow pattern analysis) examinations
C
Comparator
Angiography
O
Outcome
Detection of extracranial arterial disease (EAD) including morphological and hemodynamic changessurrogate
While Duplex ultrasound is superior for detecting early nonstenotic carotid lesions, CW-Doppler remains more reliable for identifying significant stenosis and occlusions.
Limitations
- Technically unsatisfactory examination rate of 19% for Duplex
- Failure of Duplex to differentiate between total and subtotal carotid occlusions
- Underestimation of significant stenosis by Duplex
- Impracticable vertebral flow studies with Duplex
Cite This Study
Hennerici et al. (1984) studied this question.