What will be the PA O2 when FiO2 is 0.5?
FiO2 = fraction of O2 in inspired = 50% Pressure at sea level = 760 mm Hg According to law to paial pressures of gases, Pressures exeed by a gas in a mixture is propoional : if 50% of air is O2 PAO2 = 50 % of 760 = 380 mm Hg.
>100
>150
>250
.>500
DNB 2018