What is the maximum rate of potassium IV infusion in adults?

The maximum rate of potassium IV infusion in adults without cardiac monitoring is generally not exceeding 10 mEq/hour. This guideline is primarily based on safety considerations to prevent hyperkalemia and associated complications such as cardiac arrhythmias. Infusing potassium too rapidly can lead to a dangerous increase in serum potassium levels, particularly affecting cardiac function.

When potassium is administered intravenously, there is a significant risk that elevated potassium concentrations can lead to life-threatening cardiac conditions, including ventricular tachycardia and fibrillation. Thus, the recommendation to keep the infusion rate at or below 10 mEq/hour safeguards against these risks in patients who are not under continuous cardiac monitoring.

In contrast, higher rates of infusion, such as 20 mEq/hour, typically require continuous cardiac monitoring to watch for any adverse cardiac effects. This protocol ensures that healthcare providers can promptly respond to any changes in the patient's heart rhythm. Therefore, while higher rates may be permissible under strict guidelines and monitoring, the safest limit for potassium infusion without cardiac monitoring remains at 10 mEq/hour.