Muscle echogenicity ratio can indicate severity of carpal tunnel syndrome

Dong Yoon Park, Seok Kang, Jin Seok Jeong, Joon Shik Yoon

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    Introduction: The purpose of this study was to investigate the usefulness of the echogenicity (EI) ratio of the thenar to hypothenar muscle measured using ultrasonography in assessing the severity of carpal tunnel syndrome (CTS). Methods: Fifty-nine hands of 30 patients electrodiagnostically confirmed as having CTS were classified into 3 subgroups (mild, moderate, and severe). The EI of the thenar and hypothenar muscles was measured with ultrasonography, and the EI ratio was calculated in the patients and 13 normal participants (26 hands). Results: The average EI ratio was higher in the CTS group than in the control group. We also found a positive correlation between the severity of CTS and a high EI ratio measured with ultrasonography. Discussion: The EI ratio of the thenar to hypothenar muscle is a useful parameter that can indicate the severity of CTS. Muscle Nerve 58: 304–306, 2018.

    Original languageEnglish
    Pages (from-to)304-306
    Number of pages3
    JournalMuscle and Nerve
    Issue number2
    Publication statusPublished - 2018 Aug

    Bibliographical note

    Publisher Copyright:
    © 2018 Wiley Periodicals, Inc.


    • carpal tunnel syndrome
    • denervation
    • echogenicity ratio
    • parameter
    • severity
    • ultrasonography

    ASJC Scopus subject areas

    • Physiology
    • Clinical Neurology
    • Cellular and Molecular Neuroscience
    • Physiology (medical)


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