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KMID : 1140920180420040601
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Annals of Rehabilitation Medicine
2018 Volume.42 No. 4 p.601 ~ p.608
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Investigation of the Diagnostic Value of Ultrasonography for Radial Neuropathy Located at the Spiral Groove
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Song Seo-Jin
Yoo Yeon-Ji
Won Sun-Jae
Park Hye-Jung
Rhee Won-Ihl
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Abstract
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Objective: To determine a diagnostic cut-off value for the cross-sectional area (CSA) of the radial nerve using ultrasonography for radial neuropathy located at the spiral groove (SG).
Methods: Seventeen patients with electrodiagnostic evidence of radial neuropathy at the SG and 30 healthy controls underwent ultrasonography of the radial nerve at the SG . The CSAs at the SG were compared in the patient and control groups. The CSA at the SG between the symptomatic and asymptomatic sides (ΔSx?Asx and Sx/Asx, respectively) were analyzed to obtain the optimal cut-off value. The relationship between the electrophysiological severity of radial neuropathy and CSA was also evaluated.
Results: Among the variables examined, there were statistically significant differences in the CSA between the patient and control groups, ΔSx?Asx, and Sx/Asx at the SG. In a receiver operating characteristics analysis, the cut-off CSA was 5.75 mm2 at the SG (sensitivity 52.9%, specificity 90%), 1.75 mm2 for ΔSx?Asx (sensitivity 58.8%, specificity 100%), and 1.22 mm2 for Sx/Asx (sensitivity 70.6%, specificity 93.3%) in diagnosing radial neuropathy at the SG. There was no significant correlation between CSA and electrophysiological severity score for either patient group.
Conclusion: The reference value obtained for CSA of the radial nerve at the SG may facilitate investigation of radial nerve pathologies at the SG.
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KEYWORD
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Radial neuropathy, Diagnostic imaging
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