NCLEX-PN® ExaminationPhysiological AdaptationHard
A client is experiencing severe hypokalemia with a serum potassium level of 2.8 mEq/L. The nurse knows that rapid intravenous (IV) administration of potassium is dangerous. What is the maximum recommended infusion rate for peripheral IV potassium chloride (KCl) in a non-emergent situation?
- A40 mEq/hr
- B10 mEq/hr
- C20 mEq/hr
- D5 mEq/hr
Show answer & explanationAnswer & explanation
Correct answer: B. 10 mEq/hr
Rapid IV administration of potassium can cause cardiac arrhythmias and even cardiac arrest. For peripheral IV infusion of potassium in non-emergent situations, the maximum recommended rate is typically 10 mEq/hr. Higher concentrations or faster rates are usually reserved for central line administration in critical care settings with continuous cardiac monitoring.
Why the other options are wrong
- A. 40 mEq/hr is a dangerously high rate and could cause fatal cardiac arrhythmias if administered peripherally.
- C. 20 mEq/hr is typically the maximum rate for central line administration, not peripheral.
- D. While 5 mEq/hr is safe, 10 mEq/hr is generally the maximum recommended rate for peripheral IV in non-emergent cases.
IV Potassium Administration Safety
Safe administration of intravenous potassium chloride is crucial to prevent life-threatening complications, particularly cardiac arrhythmias.
- Potassium is never given IV push (bolus).
- Always dilute potassium in IV fluids.
- Maximum peripheral IV infusion rate is typically 10 mEq/hr.
- Higher rates (up to 20 mEq/hr or more) require a central line and continuous cardiac monitoring.
- Monitor cardiac rhythm and serum potassium levels during infusion.
Memory trick: Slow K: No Push, Peripheral 10, Central 20!