A patient has an anion gap of 21 mEq/L. Based on this information, what can you conclude?
1. There is an abnormal excess of unmeasured anions in the plasma.
2. The patient probably has metabolic acidosis.
3. The concentration of fixed acids is decreased.
a. 2 only
b. 1 and 2 only
c. 1 and 3 only
d. 3 only
ANS: B
An increased anion gap (>14 mEq/L) is caused by metabolic acidosis in which fixed acids accu-mulate in the body.
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