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Oxygen Dissociation Curve (Saturation Vs. Oxygen Partial Pressure)

When drawing the oxygen dissociation curve , one has to mark certain points. You can remember these approximate values :

Oxygen Partial Pressure (kPa)

Saturation %

13.5 %97% (arterial)
3.5 %50% (P50)
5.3 %75% (venous)

Reference: Steve Yentis et al. Anaesthesia & Intensive Care A - Z, II Edition. Oxford, Butterworth-Heinemann Ltd, 2000, 414.

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