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In a cohort of 21 consecutive severe post\u2010COVID\u201019 survivors admitted to an inpatient rehabilitation hospital, 16 (76%) of them had at least one sonographic abnormality of diaphragm muscle structure or function. This corresponded to a significant reduction in diaphragm muscle contractility as represented by thickening ratio (muscle thickness at maximal inspiration\/end\u2010expiration) for the post\u2010COVID\u201019 compared to non\u2010COVID\u201019 cohorts. These findings may shed new light on neuromuscular respiratory dysfunction as a contributor to prolonged functional impairments after hospitalization for post\u2010COVID\u201019.<\/jats:p>","DOI":"10.1002\/acn3.51416","type":"journal-article","created":{"date-parts":[[2021,7,11]],"date-time":"2021-07-11T13:01:45Z","timestamp":1626008505000},"page":"1745-1749","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":71,"title":["Diaphragm dysfunction in severe COVID\u201019 as determined by neuromuscular ultrasound"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4989-6904","authenticated-orcid":false,"given":"Ellen","family":"Farr","sequence":"first","affiliation":[{"name":"McGaw Medical Center Northwestern University Feinberg School of Medicine Chicago IL USA"},{"name":"Shirley Ryan Ability Lab Chicago IL USA"},{"name":"Department of Physical Medicine and Rehabilitation Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexis R.","family":"Wolfe","sequence":"additional","affiliation":[{"name":"McGaw Medical Center Northwestern University Feinberg School of Medicine Chicago IL USA"},{"name":"The Division of Pulmonary and Critical Care Department of Medicine Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Swati","family":"Deshmukh","sequence":"additional","affiliation":[{"name":"Department of Radiology Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leslie","family":"Rydberg","sequence":"additional","affiliation":[{"name":"Shirley Ryan Ability Lab Chicago IL USA"},{"name":"Department of Physical Medicine and Rehabilitation Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachna","family":"Soriano","sequence":"additional","affiliation":[{"name":"Shirley Ryan Ability Lab Chicago IL USA"},{"name":"Department of Physical Medicine and Rehabilitation Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James M.","family":"Walter","sequence":"additional","affiliation":[{"name":"The Division of Pulmonary and Critical Care Department of Medicine Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea J.","family":"Boon","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation Mayo Clinic Rochester MN USA"},{"name":"Department of Neurology Mayo Clinic Rochester MN USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa F.","family":"Wolfe","sequence":"additional","affiliation":[{"name":"The Division of Pulmonary and Critical Care Department of Medicine Northwestern University Feinberg School of Medicine Chicago IL USA"},{"name":"The Ken and Ruth Davee Department of Neurology Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4546-8638","authenticated-orcid":false,"given":"Colin K.","family":"Franz","sequence":"additional","affiliation":[{"name":"Shirley Ryan Ability Lab Chicago IL USA"},{"name":"Department of Physical Medicine and Rehabilitation Northwestern University Feinberg School of Medicine Chicago IL USA"},{"name":"The Ken and Ruth Davee Department of Neurology Northwestern University Feinberg School of Medicine Chicago IL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,7,11]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.7326\/M20-5661"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1136\/thoraxjnl-2020-215818"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10072-020-04708-8"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.23702"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/mus.25429"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11606-020-06338-4"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1177\/1941874416663279"},{"issue":"5","key":"e_1_2_7_9_1","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1183\/09031936.93.04050587","article-title":"Human respiratory muscles: fibre morphology and capillary supply","volume":"4","author":"Mizuno M","year":"1991","journal-title":"Eur Respir J"},{"key":"e_1_2_7_10_1","unstructured":"KomaroffA.The tragedy of the post\u2010COVID \u201clong haulers\u201d. 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