Mechanics of ventilation Flashcards
1
Q
What is Boyle’s Law?
A
P1 x V1 = P2 x P2
Pressure-volume relationships of gases
2
Q
What is airflow directly proportional to?
A
The pressure difference between 2 points
3
Q
What is airflow inversely proportional to?
A
Resistance created by the airways
4
Q
In relation to the respiratory system, what 2 factors are viscosity affected by?
A
Humidity and concentration of air
5
Q
What is the main factor affecting resistance in the respiratory system?
A
Airway radius
6
Q
What is surfactant and what does it do?
A
Surfactant contains proteins that disrupt the forces between water molecules and the result is a reduction in the surface tension of the alveolar walls.
This means:
Alveolar spaces are less prone to collapsing
The lung is more compliant and is inflated easier
