Normal value for A-a Gradient (Alveolar-Arterial) Gradient - USMLE Forums
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Old 03-16-2012
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Lungs Normal value for A-a Gradient (Alveolar-Arterial) Gradient

According to Kaplan n UW the normal (acceptable) A-a of oxygen is about 10-15mm Hg. but Goljan says its 30!! what shud I follow?? i guess 10-15 right?? I don't know why people are so head over heels for Goljan if its got soo many mistakes
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Old 03-16-2012
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I always thought it was 10
At least that's what Kaplan taught me.
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Old 06-22-2013
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Quote:
Originally Posted by numbndumb View Post
According to Kaplan n UW the normal (acceptable) A-a of oxygen is about 10-15mm Hg. but Goljan says its 30!! what shud I follow?? i guess 10-15 right?? I don't know why people are so head over heels for Goljan if its got soo many mistakes

A-a gradient = (Age/4) + 4

But if Fio2 rises then normal A-a gradient is even higher
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