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Respiratory Failure & Mechanical Ventilation

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What is the expected PaO2 of a patient with normal lung who was intubated and placed on 100% FiO2?

  • 90-100 mmHg

  • 200-300 mmHg

  • 600-650 mmHg


Mazen Kherallah
Mazen Kherallah
Jul 20, 2022

If you place someone with normal lung on 100% FiO2, the the Alevopar PO2 would close to 660 and since the A-a gradient is normal (5-10) then the arterial PO2 would be around 650 mmHg.

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