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Electrolyte Panel (with Sodium, Potassium, Chloride, and Bicarbonate)

Published: August 9, 2026Updated: August 16, 2026

This test measures key minerals and chemicals in your blood that help maintain balance in your body’s fluids, including sodium, potassium, chloride, and bicarbonate.

Quick summary

["This panel helps doctors check if your body’s fluid and electrolyte levels are properly balanced, which is vital for heart function, muscle activity, and other bodily processes."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
80437-7
Short code
EMPLOYERCOUNTRY
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

Your blood sample will be analyzed for four main components: sodium, potassium, chloride, and bicarbonate. These substances work together to regulate the amount of water in your body and maintain the proper balance of acids and bases.

Why It’s Done

Doctors order this test to diagnose or monitor conditions like dehydration, kidney problems, heart issues, or high blood pressure. It’s also used to check for imbalances after surgery, during illness, or if you’re taking certain medications.

Common Conditions Monitored

Imbalances in these electrolytes can cause symptoms like muscle weakness, confusion, irregular heartbeat, or even seizures. Your doctor may recommend this test if you experience these symptoms or if you have a history of conditions affecting fluid balance.

Sample Collection and Preparation

A small blood sample is taken from a vein, usually in your arm. The blood is sent to a lab where it is processed and analyzed. No special preparation is needed, but fasting may be required depending on your specific test order.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

What does my test result mean?
Results will be compared to standard ranges for your age and health status. Low or high levels of these electrolytes can indicate problems with kidney function, heart health, dehydration, or other medical conditions. Your doctor will discuss the results with you and may recommend follow-up tests or treatments if needed.
How long will it take to get my results?
Results are typically available within 24 hours, but this can vary depending on your lab’s processing times. Your doctor’s office will contact you once the results are ready.
Can I eat or drink before this test?
Some tests may require fasting, but for this electrolyte panel, you can eat and drink normally unless instructed otherwise by your doctor. Always follow their specific guidelines for your test.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy