Your activity: 4 p.v.

Calculator: Ratio of arterial oxygen tension to fraction of inspired oxygen (PaO2/FiO2 ratio)


Calculator: Ratio of arterial oxygen tension to fraction of inspired oxygen (PaO2/FiO2 ratio)

 
Input
 
PaO2   mmHg
FiO2   fraction

 
Result
 
Important: Inputs must be complete to perform calculation.

 
 
PaO2/FiO2 ratio   mmHg
 
Decimal precision  

 

 

Interpretation

 
PaO2/FiO2 ratio (mmHg) ARDS category
>300 None
>200 and ≤300 Mild
>100 and ≤200 Moderate
≤100 Severe

 
 

 
Notes
  • The PaO2/FiO2 ratio is discussed in UpToDate topic reviews on ARDS, sepsis, multiorgan failure, mechanical ventilation, and predictive scoring systems.
  • PaO2: partial pressure (arterial) of oxygen; FiO2: fraction of inspired oxygen (entered as a decimal fraction, eg, 0.6 for 60% inspired oxygen); ARDS: acute respiratory distress syndrome.

 
Equations used
 
PaO2/FiO2 ratio = PaO2 / FiO2

 

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

Legal Notices and Disclaimer

All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.

EBMcalc is Copyright © 1998-2023 Foundation Internet Services, LLC

Topic 139613 Version 1.0