You receive a physician's order to change a patient's IV from D5½ NS with 40 mEq KCl/L to D5NS with 20 mEq KCl/L. Which serum laboratory values on this same patient best support the rationale for this IV order change?
A. Sodium 136 mEq/L, potassium 4.5 mEq/L
B. Sodium 145 mEq/L, potassium 4.8 mEq/L
C. Sodium 135 mEq/L, potassium 3.6 mEq/L
D. Sodium 144 mEq/L, potassium 3.7 mEq/L
Answer: A. Sodium 136 mEq/L, potassium 4.5 mEq/L
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