normal PaO2 of 60–100 mmHg and an oxygen content of FIO2 of 0.21 of room air, a normal PaO2/FIO2 ratio ranges between 300 and 500 mmHg. A PaO2/FIO2 ratio
the PaO2 by the FiO2. Example: patient who is receiving an FiO2 of .5 (i.e., 50%) with a measured PaO2 of 60 mmHg has a PaO2/FiO2 ratio of 120. In healthy
tension (normal) PaO2 – Partial pressure of oxygen at sea level (160 mmHg in the atmosphere, 21% of standard atmospheric pressure of 760 mmHg) in arterial
oxygen in the blood (hypoxemia) (PaO2) < 60 mmHg with a normal (normocapnia) or low (hypocapnia) level of carbon dioxide (PaCO2) in the blood. The fundamental
assesses PaO2 levels. Normally, PaO2 ranges from 75 to 100 mmHg, with hyperoxia generally being recognized when PaO2 exceeds 100 mmHg. In addition to PaO2 measurement