What lab value should a nurse report to the provider as concerning?

The correct choice is identified because a sodium level of 126 mEq/L indicates hyponatremia, which is a significantly low sodium concentration in the blood. Normal sodium levels typically range from 135 to 145 mEq/L. When sodium levels drop below this range, particularly under 130 mEq/L, it can lead to serious complications, including neurological issues, as sodium plays a crucial role in maintaining fluid balance and nerve function.

Hyponatremia can cause symptoms such as confusion, seizures, and even coma in severe cases. Therefore, a sodium level of 126 mEq/L is concerning and necessitates timely intervention by the healthcare provider to address the underlying cause and prevent adverse outcomes. In contrast, the other sodium levels presented are either within normal limits or only slightly below the normal range, which generally do not require immediate reporting or intervention.