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Reference values (gas exchange)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The blood gas figures for normal gas exchange are:

  • PIO2 20
  • PaO2 13.3 (12-14)
  • PaCO2 5.3 (5-6)
  • (PaO2 + PaCO2) 18.6
  • PIO2 - (PaO2+PaCO2) 1.4 (less than 2.5)

Check with local laboratory reference values.

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