Lung Physiologies - compliance, surface tension... Flashcards
1
Q
Decreased Compliance in conditions that
A
Scar lung tissue
Cause fluid build up
Produce surfactant deficiency
Impede lung expansion
2
Q
Surface tension
A
Causes alveoli to be as small as possible
Surfactant reduces surface tension
ST accounts for 2/3 of elastic recoil
3
Q
Airflow equation
A
Airflow = P(A)- Patmosphere/resistance
4
Q
Obstructive diseases
A
Increase resistance so more pressure required to maintain airflow
5
Q
Which diffusion occurs quicker out of the blood
A
CO2 faster than O2
Therefore when diffusion is slower than normal (emphysema/PO), hypoxia occurs before hypercapnia
6
Q
Things that shift oxygen haemoglobin saturation curve to the right
A
Acidity
Increased temperature
High levels of 2,3 DPG
Partial pressure of CO2
