Formulas Part 2

Question 1

PaO2 (Partial Pressure)

Answer 1

(Pb + PH2O) x FiO2 - (PcO2 x 1.25)

Ex: (760-47) x 20-80/.08 x 1.25

Question 2

PaO2 60 mmHg

Answer 2

90% saturation
Decrease beyond 60 causes rapid decrease in O2 bound to Hb.
Flat: Dissolved O2
Steep: O2 Combined with Hb

Question 3

SvO2 (Mixed Venous Oxygen Saturation)

Answer 3

Normal: 65-70%

Question 4

SaO2 (Oxygen Saturation)

Answer 4

Normal: 94-100%