Ventilation/Perfusion
par Bindu P
1. Alveolar Ventilation Equation
2. Lung Perfusion
2.1. Apex--Least
2.2. Base--highest
3. Lung Ventilation
3.1. Highest: Base
3.2. Lowest: Apex
4. ∆Perfusion (Base to Apex)>>∆Ventilation (Base to Apex)
5. Exercise
5.1. Increased O2 demand
5.2. Increased RR
5.3. Increased CO
5.4. V/Q ratio approaches 1
5.4.1. Increase in V> Increase in Q
5.4.2. Ratio becomes more even in zones
6. Physiological Dead Space
6.1. Bohr's Equation
6.1.1. Dead space can't cause hypoxemia on its own
6.1.2. Dead space-->Hypercapnia-->increased RR