GIÁ TRỊ CỦA DẤU HIỆU PREVEDELLO TRÊN CỘNG HƯỞNG TỪ TRONG CHẨN ĐOÁN CO GIẬT NỬA MẶT NGUYÊN PHÁT

Abstract

Objectives: To evaluate the value of the Prevedello sign on 3D T2W and 3D TOF magnetic resonance imaging (MRI) sequences in the diagnosis of neurovascular conflict of the hemifacial spasm. Methods: A cross-sectional descriptive study on 64 patients diagnosed with idiopathic hemifacial spasm who underwent microvascular decompression surgery at Viet Duc Hospital from January 2022 to January 2024. Prevedello sign were evaluated on MRI to analyze the diagnostic value of neurovascular conflicts. Results: Among the 64 patients, the majority were female (75.4%), with a mean age of 51.94. The most common neurovascular conflict was AICA (64.6%), followed by PICA (18.5%) and VA (15.4%). There were 64 neurovascular conflicts detected, among which 58 cases were correctly diagnosed on the same side as the symptoms, with a sensitivity of 90.62%, specificity of 93.75%, positive predictive value of 99.64%, and accuracy of 90.78%. Conclusion: Prevedello sign are very helpful in identifying neurovascular conflicts in patients with hemifacial spasms. When these signs are present, combined with clinical information and routine evaluation, they increase MRI sensitivity to over 90% without increasing the risk of harm to the patient or additional costs.