Abnormal Pulmonary Gas Exchange Flashcards
1
Q
Four abnormal states associated with hypoxaemia are:
A
- Ventilation / Perfusion imbalance - V/Q
- Diffusion impairment
- Alveolar Hypoventilation
- Shunt
2
Q
Define SHUNT
A
Blood passing from Right to Left side of Heart WITHOUT contacting ventilated alveoli
3
Q
What is alveolar hypoventilation
A
- Amount of air moved in and out of lungs
4
Q
What does hypoventilation increase?
A
PACO2, and thus increases PaCO2
- Increase in PACO2 decreases PAO2, which causes PaO2 to fall
- Fall in PaO2 due to hypoventilation is corrected by raising FIO2
