The client with heart disease is scheduled to receive a daily morning dose of furosemide (Lasix). The nurse would report which of the following serum potassium levels to the health care provider before administering the daily dose?
1. 5.1 mEq/L
2. 4.2 mEq/L
3. 3.8 mEq/L
4. 3.0 mEq/L
4
Rationale: The normal serum potassium level in the adult is 3.5 to 5.1 mEq/L ("5.1 mEq/L," "4.2 mEq/L," and "3.8 mEq/L"). "3.0 mEq/L" indicates a low value. Administering furosemide to a client with a low potassium level and a history of cardiovascular disease could precipitate cardiac dysrhythmias in the client. The normal levels do not require withholding the dose or notifying the physician.
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