What is the normal range for serum potassium levels?

The normal range for serum potassium levels is indeed 3.5-5.5 mEq/L. Potassium is a critical electrolyte in the body, essential for various physiological functions, including maintaining normal heart rhythm, muscle function, and nerve transmission. The highlighted range is established based on extensive clinical research and laboratory standards, ensuring that physiological processes operate effectively.

Values below 3.5 mEq/L indicate hypokalemia, which can lead to significant complications such as cardiac arrhythmias and muscle weakness. Conversely, values above 5.5 mEq/L suggest hyperkalemia, a serious condition that can also lead to life-threatening cardiac issues. Due to the narrow margin of error in potassium levels and its vital role in various bodily functions, understanding this normal range is crucial for neonatal care providers, especially when assessing infants who may be at risk for imbalances due to various factors, including medications, renal function, and underlying medical conditions.