COVID-19 is a global pandemic with significant case fatality, often due to respiratory failure. Few treatments have improved morbidity, and the only pharmacologic intervention reported to improve survival is use of glucocorticoids in hospitalized COVID-19 patients requiring supplemental oxygen. The National Institutes of Health recommends maintaining oxygen saturation levels at 92%-96 for COVID-19 patients. COVID-19 patients often have unrecognized hypoxemia …