Description
The sodium blood test measures the concentration of sodium in the blood. Sodium is an essential electrolyte that helps maintain fluid balance, supports nerve and muscle function, and regulates blood pressure. This test is used to evaluate electrolyte balance and diagnose conditions related to abnormal sodium levels, such as dehydration, kidney disease, and adrenal gland disorders. Normal blood sodium levels typically range from 135 to 145 milliequivalents per liter (mEq/L).