Rationale: Treatment with noninvasive ventilation (NIV) in coronavirus disease (COVID-19) is frequent. Shortage of intensive care unit (ICU) beds led clinicians to deliver NIV also outside ICUs. Data about the use of NIV in COVID-19 is limited. Objectives: To describe the prevalence and clinical characteristics of patients with COVID-19 treated with NIV outside the ICUs. To investigate the factors associated with NIV failure (need for intubation or death). Methods: In this prospective, single-day observational study, we enrolled adult patients with COVID-19 who were treated with NIV outside the ICU from 31 hospitals in Lombardy, Italy. Results: We collected data on demographic and clinical characteristics, ventilatory management, and patient outcomes. Of 8,753 patients with COVID-19 present in the hospitals on the study day, 909 (10%) were receiving NIV outside the ICU. A majority of patients (778/909; 85%) patients were treated with continuous positive airway pressure (CPAP), which was delivered by helmet in 617 (68%) patients. NIV failed in 300 patients (37.6%), whereas 498 (62.4%) patients were discharged alive without intubation. Overall mortality was 25%. NIV failure occurred in 152/284 (53%) patients with an arterial oxygen pressure (Pa O 2 )/fraction of inspired oxygen (F i O 2 ) ratio <150 mm Hg. Higher C-reactive protein and lower Pa O 2 /F i O 2 and platelet counts were independently associated with increased risk of NIV failure. Conclusions: The use of NIV outside the ICUs was common in COVID-19, with a predominant use of helmet CPAP, with a rate of success >60% and close to 75% in full-treatment patients. C-reactive protein, Pa O 2 /F i O 2 , and platelet counts were independently associated with increased risk of NIV failure. Clinical trial registered with ClinicalTrials.gov (NCT04382235).

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A 40-year-old woman with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection developed neurologic manifestations (confusion, agitation, seizures, dyskinesias, and parkinsonism) few weeks after SARS onset. Magnetic resonance imaging (MRI) and cerebrospinal fluid (CSF) analyses were unremarkable, but an 18F-Fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) showed limbic and extra-limbic hypermetabolism. A full recovery, alongside FDG normalization in previously hypermetabolic areas, was observed after intravenous immunoglobulin (IVIg) administration.