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[Center specific duplex Doppler threshold values in carotid artery stenosis]
Mehmet Yurdakul1, Muharrem Tola, Ensar Ozdemir
1Yüksek Ihtisas Hastanesi, Radyoloji Bölümü, Ankara, Turkey.
Tanisal Ve Girisimsel Radyoloji : Tibbi Goruntuleme Ve Girisimsel Radyoloji Dernegi Yayin Organi
|July 6, 2004
Summary
This study established specific duplex Doppler criteria for internal carotid artery stenosis, improving diagnostic accuracy. Centers should develop their own criteria for reliable stenosis grading.
Area of Science:
- Vascular Surgery
- Diagnostic Imaging
- Cardiovascular Medicine
Background:
- Traditional color Doppler ultrasonography (CDUS) grading for internal carotid artery stenosis lacks consistency with endarterectomy study outcomes.
- Accurate stenosis classification is crucial for determining appropriate treatment, such as carotid endarterectomy.
Purpose of the Study:
- To establish specific duplex Doppler threshold values for classifying critical internal carotid artery stenosis at our center.
- To align diagnostic criteria with findings from multicenter controlled randomized studies.
Main Methods:
- Compared CDUS and digital subtraction angiography in 147 patients undergoing carotid endarterectomy.
- Utilized receiver operating characteristic (ROC) analysis to determine optimal duplex Doppler thresholds for peak systolic velocity (PSV) and PSV ratio (PSV ICA/CCA).
Main Results:
- Identified optimal thresholds: PSV 133 cm/s (50-99% stenosis), PSV ICA/CCA 2.6 (60-99% stenosis), and PSV ICA/CCA 3.6 (70-99% stenosis).
- Achieved high diagnostic accuracy, with values like 92% sensitivity and 92% specificity for 70-99% stenosis using established duplex criteria.
Conclusions:
- The duplex criteria developed at this center demonstrate high accuracy for diagnosing internal carotid artery stenosis.
- Recommends that each medical center establish its own specific duplex criteria for consistent and accurate carotid artery stenosis diagnosis.