A client is admitted to the emergency department with tachycardia, hypotension, and a serum sodium level of 115 mEq/L. What does the client's serum sodium level indicate?
a. Normal serum sodium value
b. Hyponatremia
c. Hypernatremia
d. Hypocalcemia
ANS: B
Hyponatremia occurs when serum sodium levels fall below 135 mEq/L.
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