Lectures on respiratory physiology Pulmonary Gas Exchange I.

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Presentation transcript:

Lectures on respiratory physiology Pulmonary Gas Exchange I

Perfect Lung PO 2 cascade in a hypothetical perfect lung

Effect of hypoventilation

All the expired CO2 comes from the alveolar gas

Alveolar Ventilation Equation using PCO 2

Alveolar Gas Equation

Using the Alveolar Gas Equation

Alveolar gas equation for hypoventilation

What inspired O 2 concentration is required to return the alveolar PO 2 to normal?

Causes of hypoventilation

PO 2 cascade showing a diffusion step

Time courses for PO 2 in the capillary

Thickened blood-gas barrier

PO 2 cascade showing addition of shunt

O 2 concentrations with a shunt

Deriving the shunt equation

The shunt equation

Shunt causes a low arterial PO 2 with 100% O 2

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