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 resp alkalosis in restrictive dis  

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hello everyone..i was doing pathology restrictive lung diseases in goljan.he says that in the Rdiseases and ARDS there is respiratory alkalosis...How is that possible if there is fibrosis there must be less diffusion of Co2 from blood into alveoli and hence it must cause acidosis rgt? cAN someone explain why its alkalosis?



You have to increase your respiratory rate in order to keep an acceptable blood oxygen level. If you look at the diffusion coefficients you will realize that this leads to a hyperventilation of carbondioxide which of course gives respiratory alkalosis. Compare this to the child with acute asthma. He will not initially retain carbon-dioxide but is still struggling with his breathing.

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