is sao2 and pao2 the same?
Oxygen saturation (SaO2) is a measurement of the percentage of how much hemoglobin is saturated with oxygen. ... The relationship between oxygen saturation (SaO2) and partial pressure O2 (PaO2) is referred to as the oxyhemoglobin (HbO2) dissociation curve. SaO2 of about 90% is associated with PaO2 of about 60 mmHg.