Which serum potassium value reflects mild hyperkalemia in a 40-year-old man?
A. 2.8 mEq/L
B. 4.8 mEq/L
C. 5.8 mEq/L
D. 6.8 mEq/L
C
The normal range for serum potassium in adults is 3.5 to 5.0 mEq/L. Both 5.8 and 6.8 mEq/L are higher than normal. A potassium level of 6.8 mEq/L is more serious and does not represent mild hyperkalemia.
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