drplacebo
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A term eonate born after difficult delivery, has APGAR 3.Arterial blood drawn after 3min. & showed
PO2 is 10 & PCo2 is 27 mmHg
pH is 7.09
What's the best interpretation?
a)Markedly dec. PCo2 suggesting hyperventilation
b)Markedly dec pH >>> acidosis
c)Markedly dec. PO2>>>resp failure
d)Markedly inc. pH suggesting alkalosis
e)Within normal limits
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| me007
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http://www.prep4usmle.com/forum/thread/44685
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| drplacebo
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Sorry have'nt come across that post.
Anyway here's the detailed explanation for it
Ans is E !!
This is a trick Q,
We have 2 kno the Biochem of neonates; esp in 1st few min.s-hrs of life, which is a lot different from adults
-Normal range of pH @ birth 7.11-7.36
-Normal PO2 strikingly low as 8-24 mmHg
-Normal PCo is 27-40 mmHg
pH vary broadly in 1st few hours from 7.09 to 7.50, who later do well.
 
Edited by drplacebo on 03/25/07 - 05:00 AM
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| mytimenow
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E
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