The severity of SARS-CoV-2 patients is difficult to quickly assess in the ED.
The ABG test is a quick and easy tool that can help identify more severe patients.
CT cannot be used on all suspected SARS-CoV-2 infected patients admitted in ED.
The CT volumetry correlates well with the values of severity reported by the ABG test.
Keywords: Arterail blood gas; COVID-19; COVID-19 pneumonia; CT volumetry; Emergency department; Emergency medicine; SARS-CoV-2.