What is the normal range for serum sodium levels?

The normal range for serum sodium levels is essential in assessing a patient's electrolyte balance and overall health. Serum sodium levels reflect the amount of sodium in the blood and are crucial for maintaining fluid balance, nerve function, and muscle contraction.

The correct range of 135-145 mEq/L is established based on extensive clinical research and is widely accepted in medical practice. Values within this range indicate that the body's sodium and fluid levels are well-regulated, contributing to normal physiological functions. Deviations from this range can lead to conditions such as hyponatremia (low sodium) or hypernatremia (high sodium), which can cause significant health issues.

In contrast, ranges such as 120-130 mEq/L, 145-150 mEq/L, and 150-160 mEq/L would indicate abnormalities. For instance, a range of 120-130 mEq/L suggests hyponatremia, which can lead to symptoms like confusion, seizures, and even coma if severe. Likewise, levels above 145 mEq/L can signify hypernatremia, which may result in increased thirst, confusion, and potential damage to body organs. Therefore, understanding and recognizing the normal sodium level range is crucial for medical technologists in interpreting