phys #5.txt

What gases are diffusion limited?

CO, O₂
What gases are perfusion limited?
- Niitrous oxide (N₂0), O₂(more common pefusion than diffusion)
What causes O₂ to switch from perfusion to diffusion-mediated?
- Diffusion capacity decreases
- Fibrosis causes thickness to increase, so less oxygen can get through and the time to get through increases
- Partial Pressure is maintained throughout capillary
If the molecular weight drops and solubility increases, what happens to Diffusion coefficient?
- It will increase
- **This means that the specific gas will be more readily absorbed
What does body size, gender and age do to diffusion capacity (D_L)?
- Body size = increase
- Gender = Male = increase
- Age = decrease
What are the three methods of gases being used in the body?
- Dissolved: Nitrogen
- Bound : O₂ to Hgb
- Modified: CO₂ to HCO₃^-

Author

kepling

71865

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phys #5.txt

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phys #5

Updated

2011-03-09T21:08:01Z

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