PaO₂/FiO₂ Ratio Calculator

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PaO₂/FiO₂ Ratio
Clinical Decision Tool

Calculates the arterial oxygen tension to inspired oxygen fraction ratio.

PaO₂ Arterial partial pressure of oxygen. Accepted units mmHg Used by PaO₂/FiO₂ Ratio Clinical note Use an arterial blood-gas result obtained with a known FiO₂. Reference ARDS Definition Task Force. JAMA. 2012;307:2526–2533. Learn more →
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