A sodium blood test is used to detect abnormal concentrations of sodium, including low sodium (hyponatremia) and high sodium (hypernatremia). It is often used as part of an electrolyte panel or basic metabolic panel for a routine health checkup.
The most common form of sodium is sodium chloride, which is table salt. This test is usually done as part of an electrolyte or basic metabolic panel blood test. Your blood sodium level represents a balance between the sodium and water in the food and drinks you consume and the amount in your urine.
The normal range for blood sodium levels is 135 to 145 milliequivalents per liter (mEq/L).
