Efficacy of CW-Doppler and Duplex System Examinations for the Evaluation of Extracranial Carotid Disease

✍ Scribed by Michael Hennerici; Hans-Joachim Freund

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 791 KB
• Volume: 12
• Category: Article
• ISSN: 0091-2751
• DOI: 10.1002/jcu.1870120307

✦ Synopsis

The efficacy of different ultrasound methods for the detection of extracranial arterial disease (EAD) was evaluated on the basis of the comparison with angiography. High-resolution B-scan imaging combined with a multigated pulsed Doppler flow pattern analysis (Duplex system) achieved the best results for the detection of morphological and hemodynamic changes of nonstenotic lesions and low grade stenosis. However, a technically unsatisfactory examination rate of 19%, the failure to differentiate between total and subtotal carotid occlusions, underestimation of significant stenosis and impracticable vertebral flow studies were disadvantages of the Duplex technique. CW-Doppler examinations proved to be more precise and more reliable for the detection of significant stenosis and occlusions. Since vertebral blood flow studies were impractical with the Duplex system, CW-Doppler provides more comprehensive information about the hemodynamics of cerebral blood supply.