Dialysis Technician Practice Exam

Which of the following values is considered the normal range for sodium?

1. 125-135 mEq/L

2. 135-146 mEq/L

3. 140-150 mEq/L

4. 145-155 mEq/L

The correct answer is: 135-146 mEq/L

The normal range for sodium in the blood is typically recognized as 135 to 145 mEq/L. This range indicates the amount of sodium that is present in the extracellular fluid, which plays a critical role in maintaining fluid balance, blood pressure, and proper nerve and muscle function. Choosing this range as the correct answer reflects an understanding of the physiological role of sodium and its significance in the body, including its contributions to homeostasis. Values falling outside of this range can lead to various health issues; for instance, low sodium (hyponatremia) can cause neurological symptoms due to increased brain cell swelling, while high sodium (hypernatremia) can lead to dehydration and complications related to fluid overload. The other ranges provided in the options either extend too low or too high, which do not reflect the accepted normal levels for sodium and can mislead regarding proper diagnosis and treatment in a clinical setting. Recognizing the correct range is essential for a dialysis technician, as it is crucial for monitoring and managing patients’ electrolyte levels accurately.