Heart and Lungs

Question 1

Oxygenation

Answer 1

• The ability of the lungs to oxygenate the blood
• The concentration of dissolved O2 in arterial blood (PaO2) is used to measure this
• Can also be done via SPO2 but this is an indirect marker

Question 2

Ventilation

Answer 2

• The movement of air in and out of the lungs, with the goal of removing CO2
• A CO2 above 50mmHg (hypercapnia) is indicative of a ventilation issue