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KMID : 1130620140100040348
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Journal of Clinical Neurology
2014 Volume.10 No. 4 p.348 ~ p.353
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Correlation between Ultrasonography Findings and Electrodiagnostic Severity in Carpal Tunnel Syndrome: 3D Ultrasonography
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Kwon Hee-Kyu
Kang Hyo-Jung
Byun Chan-Woo
Yoon Joon-Shik
Kang Chang-Ho
Pyun Sung-Bum
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Abstract
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Background and Purpose: To determine the correlation between the cross-sectional area (CSA) of the median nerve measured at the wrist using three-dimensional (3D) ultrasonography (US) and the electrophysiological severity of carpal tunnel syndrome (CTS).
Methods: We prospectively examined 102 wrists of 51 patients with clinical CTS, which were classified into 3 groups according to the electrodiagnostic (EDX) findings. Median nerve CSAs were measured using 3D US at the carpal tunnel inlet and at the level of maximal swelling.
Results: Ten wrists were negative for CTS. Of the 92 CTS-positive wrists, 23, 30, and 39 were classified as having mild, moderate, and severe CTS, respectively. The median nerve CSA differed significantly between the severe- and moderate-CTS groups (p=0.0007 at the carpal tunnel inlet and p<0.0001 at the maximal swelling site). There was a correlation between median nerve CSA and EDX parameters among those wrists with severe and mild CTS (p<0.0001 at both sites).
Conclusions: The median nerve CSA as measured by 3D US could provide additional information about the severity of CTS, as indicated by the strong correlation with standard EDX findings.
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KEYWORD
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three-dimensional ultrasonography, carpal tunnel syndrome, cross-sectional area, electrophysiological severity, median nerve
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