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From the Departments of Clinical Neurophysiology (Drs. Kele, Bittermann, and Reimers) and Neurosurgery (Dr. Verheggen), University of Göttingen, Germany.
Address correspondence and reprint requests to Dr. H. Kele, Dept. of Clinical Neurophysiology, University of Göttingen, Robert-Koch-Str. 40, D-37075 Göttingen, Germany; e-mail: hkele{at}gwdg.de
The authors compared ultrasonography with electrophysiology for the diagnosis of carpal tunnel syndrome (CTS) on 110 clinically affected wrists. An increased cross sectional area in the proximal carpal tunnel larger than 0.11 cm2 in combination with compression signs on longitudinal scans proved to be highly predictive for CTS (sensitivity, 89.1%; specificity, 98.0%). Ultrasound was comparable to electrophysiology in the diagnosis of CTS, and in 35% of cases changes in morphology suggested a specific therapeutic strategy.
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