The Reliability of Ultrasound Measurements of the Median Nerve at the Carpal Tunnel Inlet

The Journal of Hand Surgery
John R FowlerKevin Kruse

Abstract

To determine the interrater and intra-rater reliability of ultrasound (US) measurement of the cross-sectional area (CSA) of the median nerve at the carpal tunnel inlet. Three examiners of varying levels of experience performed US measurements of the CSA of the median nerve at the carpal tunnel inlet of both wrists of 11 healthy volunteers. Each examiner was blinded to the measurements of the other examiners. The measurements were repeated 2 weeks later in random order to test intra-rater reliability. The Lin concordance correlation coefficient (LCCC) for interrater and intra-rater reliability was calculated. The overall inter-rater LCCC was 0.59 (95% confidence interval [CI], 0.41-0.73). Intra-rater LCCC varied based on examiner experience. The senior author had an intra-rater LCCC of 0.91 (95% CI, 0.80-0.96), the hand fellow had an intra-rater LCCC of 0.45 (95% CI, 0.17-0.66), and the first-year resident had an intra-rater LCCC of 0.78 (95% CI, 0.55-0.90). There is moderate agreement among examiners of varying levels of experience when measuring the CSA of the median nerve at the carpal tunnel inlet. Examiner experience affected intra-rater reliability of measurements; an experienced examiner had nearly perfect agreement compa...Continue Reading

References

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Citations

Oct 6, 2016·The Journal of Hand Surgery·Benson J PulikkottilJohn R Fowler
Sep 21, 2017·Hand : Official Journal of the American Association for Hand Surgery·Jared A CrastoJohn R Fowler
Oct 6, 2017·Muscle & Nerve·Rocio Garcia-SantibanezCraig M Zaidman
Dec 30, 2018·Neurology·Johan A TellemanLeo H Visser
Jul 22, 2018·Hand : Official Journal of the American Association for Hand Surgery·Gideon NkrumahJohn R Fowler
May 26, 2020·Hand : Official Journal of the American Association for Hand Surgery·Cory Demino, John R Fowler
Jul 28, 2020·Hand : Official Journal of the American Association for Hand Surgery·Timothy GaoJohn R Fowler
Jun 17, 2020·Plastic and Reconstructive Surgery. Global Open·Jacob E Tulipan, Asif M Ilyas
Sep 28, 2020·Journal of Orthopaedic Science : Official Journal of the Japanese Orthopaedic Association·Peter JørgsholmNiels O B Thomsen
Dec 12, 2020·PM & R : the Journal of Injury, Function, and Rehabilitation·Yin-Ting ChenMichael Fredericson
May 2, 2021·Ultrasound in Medicine & Biology·Raymond T FestenPeter C Amadio
Jun 11, 2021·Journal of Wrist Surgery·Trevor SimcoxRonit Wollstein
Aug 12, 2017·Musculoskeletal Science & Practice·Elena Bueno-GraciaJosé Miguel Tricás-Moreno

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