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In light of the global pandemic of coronavirus disease 2019 (COVID\u201019), there has been growing interest in the utility of ultrasound for evaluation of respiratory symptoms including lung and diaphragm sonography. Diaphragm ultrasound can be utilized to diagnose diaphragm dysfunction, assess severity of dysfunction, and monitor disease progression. This article reviews diaphragm and phrenic nerve ultrasound and describes clinical applications in the context of COVID\u201019.<\/jats:p>","DOI":"10.1002\/jum.15706","type":"journal-article","created":{"date-parts":[[2021,3,27]],"date-time":"2021-03-27T10:57:40Z","timestamp":1616842660000},"page":"285-299","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Diaphragm and Phrenic Nerve Ultrasound in <scp>COVID<\/scp>\u201019 Patients and Beyond"],"prefix":"10.1002","volume":"41","author":[{"given":"Zaid","family":"Patel","sequence":"first","affiliation":[{"name":"AMITA Health Saint Francis Hospital  Evanston Illinois USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Colin K.","family":"Franz","sequence":"additional","affiliation":[{"name":"Shirley Ryan Ability Lab (Formerly the Rehabilitation Institute of Chicago)  Chicago Illinois USA"},{"name":"Department of Physical Medicine and Rehabilitation 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