Al-Otaibi and Hardman developed a simple equation for estimating the PaO2 after making a change in the FIO2. The authors are from the University of Nottingham.
Parameters:
(1) previous PaO2 in kPa
(2) previous FIO2
(3) new FIO2
predicted PaO2 with the new FIO2 =
= A * B
A =
= (new FIO2) * (previous PaO2) / (previous FIO2)
B =
= 1 – (((old FIO2 – (new FIO2)) / 2)
Performance:
• The 95% limits of agreement was 0.11 (2.0) kPa.
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