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Prep4USMLE » USMLE Step 2 CK Forum » Internal Medicine Forum » Comments on ABG


 ABG  



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hs486083

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Dec 29, 2010 - 8:47 AM       #1

A patient with dyspnea came to ED, in ABG:
PO2=42mmHg PCO2=38mmHg
After O2 adminstration (8L/min) via mask in following ABG there is no obvious difference in hypoxia and PCO2 level. what is the most probable cause of hypoxia in this patient?
A. shunt
B. V/Q mismatch
C. hypoventilation
D. diffusion disorder


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mn2_200

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Dec 29, 2010 - 9:46 AM       #2

a


anunnaki

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Dec 29, 2010 - 11:24 AM       #3

A, shunt


Misrati

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Dec 29, 2010 - 8:48 PM       #4

right, A.





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