Loading metrics Open Access Peer-reviewed Research Article Magnus Ekström , Anna Engblom, Adam Ilic, Nicholas Holthius, Peter Nordström, Ivar Vaara Magnus Ekström, Anna Engblom, Adam Ilic, Nicholas Holthius, Peter Nordström, Ivar Vaara Published: April 12, 2019 https://doi.org/10.1371/journal.pone.0215413 Figures Abstract Background Arterial blood gases (ABG) are essential for assessment of patients with severe illness, but sampling is difficult in some settings and more painful than for...