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[Duplex sonography of the internal jugular vein].

Based on defined diagnostic criteria high-resolution Duplex sonography allows the accurate evaluation of normal and pathological jugular vein. Compared to examinations with only the B-mode the diagnostic accuracy is higher with the duplex system with additional display of venous flow signals. Normal findings and results of duplex sonography in patients with venous inflow congestion, thrombosis and aneurysm of the jugular vein are presented, and their clinical relevance of the method discussed.