Not to quibble since I may not be understanding, but isn’t the normal PaO2/FiO2 ratio typicallylessthan 500 at sea level? Assuming a PaO2 of 100 and FiO2 of 0.21, the ratio would be about 476, i.e. less than 500. Thanks,
However, we do believe that this limitation may be acceptable as routine practice is based on F iO2 titration to reach and maintain S pO2 between 95 and 97% [29–31]. Fourth, we were not able to measure FiO2, except for Venturi mask (provided by manufacturer), NIV and ...