Journals / Tanısal ve Girişimsel Radyoloji (Yeni Adı: Dİagnostic & Intervent. Radiol) / 2004 / Cilt: 10 - Sayı: 2

Center specific duplex Doppler threshold values in carotid artery stenosis

Karotid arter stenozlarında merkeze özgü dupleks Doppler eşik değerleri

Pages
167–172
DOI
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⚡ TL;DR(Too Long; Didn't Read)

The purpose of this study was to determine duplex Doppler threshold values specific to our center for classification of critical internal carotid artery stenosis which is determined according to the results obtained from multi-center clinical studies.

📌 3 Key Takeaways

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Objective & Hypothesis:PURPOSE: The traditional categorizations of color Doppler ultrasonography (CDUS) used for grading internal carotid artery stenosis are not consistent with the multicenter controlled randomized studies of carotid artery endarterectomy.
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Key Findings & Data:MATERIALS AND METHODS: CDUS and digital subtraction angiography examinations were performed in 147 patients who were considered suitable for carotid endarterectomy.
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Conclusion & Impact:The purpose of this study was to determine duplex Doppler threshold values specific to our center for classification of critical internal carotid artery stenosis which is determined according to the results obtained from multi-center clinical studies.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Anjiyografi · dijital subtraksiyon · Karotis arterleri

Abstract

PURPOSE: The traditional categorizations of color Doppler ultrasonography (CDUS) used for grading internal carotid artery stenosis are not consistent with the multicenter controlled randomized studies of carotid artery endarterectomy. The purpose of this study was to determine duplex Doppler threshold values specific to our center for classification of critical internal carotid artery stenosis which is determined according to the results obtained from multi-center clinical studies. MATERIALS AND METHODS: CDUS and digital subtraction angiography examinations were performed in 147 patients who were considered suitable for carotid endarterectomy. Using the values of peak systolic velocity (PSV), end diastolic velocity and peak systolic velocity ratio (PSV ICA/CCA), the optimum duplex Doppler threshold values were determined for internal artery carotid stenoses by ROC (receiver operating characteristics) analysis. RESULTS: The most accurate threshold levels for detection of ICA stenoses were found to be a PSV 133 cm/s for 50-99% stenosis, PSV ICA/CCA 2.6 for 60-99% stenosis and PSV ICA/CCA 3.6 for 70-99% stenosis. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy estimated using optimal duplex criteria for identification of ICA stenoses were 88%, 85% 78%, 91%, 86% for 50-69%, 94%, 87%, 71%, 98%, 89% for 60-99% stenosis, 92%, 92%, 65%, 99%, 92% for 70-99% stenosis, respectively. CONCLUSION: The duplex criteria established in our center have high accuracy. Every center should establish its own duplex criteria for the diagnosis of carotid artery stenosis.

Özet

AMAÇ Renkli Doppler ultrasonografinin (RDUS) internal karotid arter stenozu derecelendirilmesinde kullanılan geleneksel kategorizasyonlar, karotid arter endarterektomisi ile ilgili yapılan çok merkezli kontrollü randomize çalışmalarla uygunluk göstermemektedir. Bu çalışmanın amacı çok merkezli klinik çalışmalardan elde edilen sonuçlara göre belirlenmiş olan kritik internal karotid arter stenozu dereceleri için merkezimize özel dupleks Doppler eşik değerlerini belirlemektir. GEREÇ VE YÖNTEM Karotid endarterektomi yapılması düşünülen 147 hastaya RDUS ve dijital substraksiyon anjiyografi incelemeleri yapıldı. RDUS incelemelerinden elde edilen pik sistolik hız (PSV), diastol sonu hız ve piksistolik hız oranı (PSV ICA/CCA) değerleri kullanılarak %50-99, %60-99 ve %70-99 internal karotid arter stenozları için ROC (receiver operating charasteristic) eğrisi analizi yapılarak optimum dupleks Doppler eşik değerleri belirlendi. BULGULAR %50-99 stenoz için 133 cm/sn PSV, %60-99 stenoz için 2,6 PSV ICA/CCA , %70-99 stenoz için 3.6 PSV ICA/CCA, eşik değerleri en yüksek doğruluğa sahipti. Bu eşik değerler için sensitivite, spesifisite, pozitif prediktif değer, negatif prediktif değer ve doğruluk oranları sırası ile %50-99 stenoz için %88, %85, %78, %91, %86; %60-99 stenoz için %94, %87, %71, %98, %89; %70-99 stenoz için %92, %92, %65, %99, %92 olarak bulundu. SONUÇ Bölümümüzde oluşturduğumuz dupleks kriterleri yüksek doğruluğa sahiptir. Her merkez karotid arter stenozu tanısı için kendi dupleks kriterlerini oluşturmalıdır.

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Cite This Article

YURDAKUL, M., TOLA, M., ÖZDEMİR, E., ÖZBÜLBÜL, I. N., CUMHUR, T. (2004). Center specific duplex Doppler threshold values in carotid artery stenosis. Tanısal ve Girişimsel Radyoloji (Yeni Adı: Dİagnostic & Intervent. Radiol), Cilt: 10 - Sayı: 2, 167–172. https://ajindex.com/articles/363183

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