An ABG result shows the pH to be 7.56 and the HCO3- to be 23 mEq/L. Which of the following is the most likely disorder?
a. Metabolic acidosis
b. Metabolic alkalosis
c. Respiratory acidosis
d. Respiratory alkalosis
ANS: D
If HCO3– is in the normal range in the presence of alkalosis, then the alkalosis probably is of res-piratory origin.
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