The nurse is assessing a patient after returning from surgery. After reviewing the patient's lab results, the nurse should notify the physician of

Potassium 3.1 mEq/L.


• The patient's potassium level is low. Even a small decline in potassium can cause serious cardiac events.

• Sodium normal range: 135–145 mEq/L
• Potassium normal range: 3.5–5.0 mEq/L
• Magnesium normal range: 1.3–2.1 mEq/L
• Phosphorus normal range: 3–4.5 mg/dL

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