Sodium (Na) in blood.
Measurement of sodium levels in the blood allows assessment of the body's fluid and electrolyte balance and helps identify disorders related to fluid and electrolyte metabolism. Sodium is one of the principal minerals of the extracellular fluid and plays a vital role in maintaining the normal function of cells, the nervous system, and muscle tissue.
Sodium is involved in the regulation of blood pressure, maintenance of acid-base balance, transmission of nerve impulses, and muscle contraction. Changes in blood sodium concentration may occur in kidney diseases, cardiovascular disorders, endocrine abnormalities, dehydration, or excessive fluid intake.
The test is recommended for patients experiencing general weakness, muscle cramps, impaired consciousness, changes in blood pressure, or edema, as well as for monitoring individuals with kidney, heart, or endocrine disorders. It may also be used to monitor ongoing therapy and evaluate treatment effectiveness.
The analysis is performed using a venous blood sample examined by high-precision chromatography. The results help physicians assess the body's electrolyte balance and identify possible causes of metabolic disturbances.
Preparation requirements are determined by the recommendations of the attending physician or laboratory. Blood collection is usually performed after fasting. Interpretation of the results should be carried out by a healthcare professional, taking into account the clinical presentation and findings of other laboratory tests.