03-21-2007, 08:01 PM
Diffusion =partial pressure diffeerence into diffusing capacity[alveolar diffusion]
Diffusing Capacity is determined by:
1. Surface area available for diffusion. Decreased in:
- Atelectesis (collapsed alveoli)
- Pulmonary embolism (blocked areas)
- Emphysima (degenerated tissue)
2. Distance. Increased in:
- Pulmonary edema.
3. Diffusion Coefficient. Affected mainly by solubility of the gas
What i did not understand is the mechanism it decreases where there is Anemia,degenration ,blockadge like emphysema,cystic fibrosis,atelectasis,
in polycythemia why will it increase ??? so is Chf and in intrapulmonar haemorrhage
ulise what did you say before ,carbon monoxide ,from where did it come from?????
Diffusing Capacity is determined by:
1. Surface area available for diffusion. Decreased in:
- Atelectesis (collapsed alveoli)
- Pulmonary embolism (blocked areas)
- Emphysima (degenerated tissue)
2. Distance. Increased in:
- Pulmonary edema.
3. Diffusion Coefficient. Affected mainly by solubility of the gas
What i did not understand is the mechanism it decreases where there is Anemia,degenration ,blockadge like emphysema,cystic fibrosis,atelectasis,
in polycythemia why will it increase ??? so is Chf and in intrapulmonar haemorrhage
ulise what did you say before ,carbon monoxide ,from where did it come from?????