Hypoxemia rather than Hypercarbia in Interstitial Lung Diseases? - USMLE Forums
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Old 04-21-2012
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Lungs Hypoxemia rather than Hypercarbia in Interstitial Lung Diseases?

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Restrictive lung diseases are more likely to cause hypoxemia than hypercarbia. The PaC02 in Interstitial Pulmonary Fibrosis is usually low until end-stage disease occurs.
Cant get it...anyone?
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Old 04-21-2012
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I think alveoli are effected by infiltration in restrictive lung disease so diffusion of oxygen is low when compared to co2 which is 200times more diffusible than oxygen...so hypoxia than hypercarbia. Please correct me if i am wrong.
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Old 04-21-2012
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I agree

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Originally Posted by confident View Post
I think alveoli are effected by infiltration in restrictive lung disease so diffusion of oxygen is low when compared to co2 which is 200times more diffusible than oxygen...so hypoxia than hypercarbia. Please correct me if i am wrong.
Yes, I agree, it's because Carbon Dioxide more diffusible.
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Old 04-21-2012
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In other words, the breaths are shallow, so there is not enough time for oxygen to get in. However, since co2 crosses so much more quickly, there is plenty of time for it to get out.
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Pathology-, Physiology-, Pulmonology-, Respiratory-

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