Total Sodium (Na), Serum
The test determines the sodium level — one of the main blood electrolytes involved in maintaining water-electrolyte and acid-base balance, as well as normal heart, muscle, and nervous system function.
Mechanism of abnormalities: elevation or decrease in sodium concentration indicates water-salt metabolism disorder, kidney, liver, or endocrine system function disorder.
Recommended for:
- people with chronic kidney or liver diseases
- with arterial hypertension or swelling
- for monitoring diuretic or other electrolyte-affecting medication therapy
Biomaterial: Venous blood
- Submit fasting (8-12 hours without food)
- Do not drink water
- Avoid medications affecting water-electrolyte balance for 24 hours (with doctor's approval)
- Avoid intense physical exertion and stress
Medications: if taking diuretics or electrolyte-affecting medications — inform the doctor
- Suspected water-electrolyte balance disorders
- Swelling or arterial hypertension
- Chronic kidney, liver, or heart diseases
- Monitoring diuretic therapy
Normal — sodium level within reference values
Abnormality — requires physician assessment to determine the cause and prescribe correct treatment
Which doctor to consult:
For test abnormalities, consultation with a general practitioner or nephrologist is recommended. The doctor evaluates laboratory results, clarifies clinical symptoms, and if needed prescribes treatment or adjusts therapy.
Self-treatment is not recommended!
