MEDNAX Neonatal Nurse Practitioner (NNP) Practice Exam

Hyperkalemia is defined as a serum potassium greater than which value?

6.5 mEq/L 7.0 mEq/L 7.5 mEq/L 8.0 mEq/L

Correct Answer:

7.0 mEq/L

Explanation:

Potassium above the upper limit of normal defines hyperkalemia. While normal potassium is roughly 3.5–5.0 mEq/L, exam conventions for this item set the definitional threshold at seven mEq/L. Reaching or exceeding this level signals a high risk of serious cardiac effects and typically prompts urgent evaluation and treatment. A value like 6.5 mEq/L is elevated and important clinically, but the defined cutoff here is seven; higher values such as 7.5 or 8.0 indicate even more severe hyperkalemia with greater risk.

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