Arterial oxygen tension (PaO2) values atpulse oximetry O2 saturation (SpO2) value of90, 92, 94, and 95%. The inspired O2 concentration(FiO2) was adjusted until the desired steady-stateSpO2 value was achieved. The solid horizontal linerepresents the mean PaO2 value obtained for eachSpO2 target. The closed and open circles represent valuesobtained in black and white patients, respectively. In whitepatients, anSpO2 target of 92% resulted in a satisfactory level ofoxygenation, whereas a higher SpO2 target, 95%, wasrequired in black patients. Published with permission .