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Electrolyte Panel with Sodium, Potassium, Chloride, and Bicarbonate (Serum/Plasma)

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

This blood test measures key minerals and chemicals in your blood to check how well your body is balancing fluids and maintaining normal levels of these substances.

Quick summary

["Essential for fluid balance, nerve function, and acid-base chemistry in your body."]

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

Key facts at a glance

LOINC
63267-9
Short code
ENA Jo1 Ab CSF Ql IA
Synonyms
ENA Jo1 Ab CSF Ql IA
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

Your blood sample will be tested for sodium (Na⁺), potassium (K⁺), chloride (Cl⁻), and bicarbonate (HCO₃⁻). These electrolytes help regulate how fluids move in and out of your cells, support nerve and muscle function, and maintain your body’s acid-base balance.

Why It Matters in Daily Life

Abnormal levels of these electrolytes can cause symptoms like muscle weakness, cramps, confusion, irregular heartbeat, or even more serious conditions if left untreated.

Common Causes of Abnormal Results

Changes in these levels can occur due to dehydration, kidney problems, heart conditions, certain medications, or excessive sweating. Your doctor may also check these levels if you’re experiencing symptoms like excessive thirst, fatigue, or unusual muscle twitching.

When You Might Need This Test

Your doctor may order this test to monitor fluid and electrolyte balance, check for kidney or heart issues, evaluate symptoms like nausea, confusion, or irregular heartbeat, or assess response to treatments like diuretics or IV fluids.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Basic Electrolytes

Frequently asked questions

How long does it take to get my results back?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time. Your doctor will discuss the findings with you during your follow-up visit.
Can I eat or drink anything before this test?
For most electrolyte panels, you can eat and drink normally unless your doctor specifies otherwise. Some tests may require fasting, so always follow your lab’s instructions.
What should I do if I have symptoms like nausea or dizziness before my test?
If you experience severe symptoms like extreme weakness, confusion, or irregular heartbeat, seek medical attention immediately. Mild symptoms may not affect your test results, but inform your doctor if they occur.
  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