Does the ratio of the carpal tunnel inlet and outlet cross-sectional areas in the median nerve reflect carpal tunnel syndrome severity?

Neural Regeneration Research
Li ZhangLin Chen

Abstract

Although ultrasound measurements have been used in previous studies on carpal tunnel syndrome to visualize injury to the median nerve, whether such ultrasound data can indicate the severity of carpal tunnel syndrome remains controversial. The cross-sectional areas of the median nerve at the tunnel inlet and outlet can show swelling and compression of the nerve at the carpal. We hypothesized that the ratio of the cross-sectional areas of the median nerve at the carpal tunnel inlet to outlet accurately reflects the severity of carpal tunnel syndrome. To test this, high-resolution ultrasound with a linear array transducer at 5-17 MHz was used to assess 77 patients with carpal tunnel syndrome. The results showed that the cut-off point for the inlet-to-outlet ratio was 1.14. Significant differences in the inlet-to-outlet ratio were found among patients with mild, moderate, and severe carpal tunnel syndrome. The cut-off point in the ratio of cross-sectional areas of the median nerve was 1.29 between mild and more severe (moderate and severe) carpal tunnel syndrome patients with 64.7% sensitivity and 72.7% specificity. The cut-off point in the ratio of cross-sectional areas of the median nerve was 1.52 between the moderate and severe ...Continue Reading

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Citations

Mar 18, 2017·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Hala R El HabashyAya S Ahmed
Sep 30, 2017·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Dražen AžmanVida Demarin
Feb 29, 2020·Journal of Biomechanical Engineering·Rakshit Shah, Zong-Ming Li
Dec 20, 2019·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Amr Mohamed GamilAhmed Mohamed El Deeb
Sep 20, 2020·European Journal of Radiology·Dinesh ManoharanMohd Tahir Ansari
Mar 2, 2021·Der Radiologe·Jennifer Kollmer, Martin Bendszus

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