The nurse receives the patient's most recent blood work results. Which laboratory value is of greatest concern?
a. Sodium of 145 mEq/L
b. Calcium of 15.5 mg/dL
c. Potassium of 3.5 mEq/L
d. Chloride of 100 mEq/L
ANS: B
Normal calcium range is 8.4 to 10.5 mg/dL; therefore, a value of 15.5 mg/dL is abnormally high and of concern. The rest of the laboratory values are within their normal ranges: sodium 136 to 145 mEq/L; potassium 3.5 to 5.0 mEq/L; and chloride 98 to 106 mEq/L.
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