{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T04:41:58Z","timestamp":1782794518195,"version":"3.54.5"},"reference-count":22,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2017,9,20]],"date-time":"2017-09-20T00:00:00Z","timestamp":1505865600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Hand (New York, N,Y.)"],"published-print":{"date-parts":[[2019,3]]},"abstract":"<jats:p>\n                    Background: The purpose of this study was to determine the effect of concise instruction and guidance on the accuracy of measuring the cross-sectional area of the median nerve at the carpal tunnel inlet. Methods: Seven orthopedic residents and 5 hand fellows obtained serial measurements of the median nerve at the carpal tunnel inlet using a 15-6 MHz ultrasound (US) probe. After a 5-minute teaching session, all participants repeated measurements. A single cadaveric specimen was used. Measurements were compared with the measurement of a fellowship-trained hand surgeon with extensive experience in US diagnosis of carpal tunnel syndrome. This was considered the reference standard. Results: The rate of participants selecting the correct structure to measure on US was 36% before instruction and 97% after. Discarding the measurements of the incorrect structure, the average measurement was 4.8 mm\n                    <jats:sup>2<\/jats:sup>\n                    before instruction and 5.2 mm\n                    <jats:sup>2<\/jats:sup>\n                    after. The standard measurement was 6 mm\n                    <jats:sup>2<\/jats:sup>\n                    . The average deviation from the standard measurement \u2212.2 mm\n                    <jats:sup>2<\/jats:sup>\n                    before instruction and \u22120.8 mm\n                    <jats:sup>2<\/jats:sup>\n                    after. The percent of measurements (of the correct structure) that fell within 1 mm\n                    <jats:sup>2<\/jats:sup>\n                    of the standard measurement increased from 62% to 74%. Participant self-reported confidence in performing measurements elevated from 2.4\/10 before instruction to 6.5\/10 after. Conclusions: US of the median nerve cross-sectional area can be efficiently taught and results in measurements consistent with that of an experienced operator.\n                  <\/jats:p>","DOI":"10.1177\/1558944717731857","type":"journal-article","created":{"date-parts":[[2017,9,20]],"date-time":"2017-09-20T08:59:01Z","timestamp":1505897941000},"page":"155-162","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":22,"title":["Ultrasound Measurement of the Cross-Sectional Area of the Median Nerve: The Effect of Teaching on Measurement Accuracy"],"prefix":"10.1177","volume":"14","author":[{"given":"Jared A.","family":"Crasto","sequence":"first","affiliation":[{"name":"University of Pittsburgh Medical Center, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael E.","family":"Scott","sequence":"additional","affiliation":[{"name":"University of Pittsburgh Medical Center, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John R.","family":"Fowler","sequence":"additional","affiliation":[{"name":"University of Pittsburgh Medical Center, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2017,9,20]]},"reference":[{"key":"bibr1-1558944717731857","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2008.27.2.193"},{"key":"bibr2-1558944717731857","doi-asserted-by":"publisher","DOI":"10.7863\/jum.2004.23.10.1301"},{"key":"bibr3-1558944717731857","doi-asserted-by":"publisher","DOI":"10.1002\/mus.10227"},{"key":"bibr4-1558944717731857","unstructured":"Beggs I, Bianchi S, Bueno A, Musculoskeletal ultrasound technical guidelines. 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