7th February 2024

Oxygen

Oxygen is carried in the blood via two methods:

This is reflected in the following formula:

Oxygen content in blood (mL of oxygen/100mL blood) = [1.34 x SpO2 x Hb (g/L)] +[0.023 x PaO2 (kPa)]

Delivery of oxygen is dependent on cardiac output.

Delivery of oxygen = Cardiac output x oxygen content in blood

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