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Serum/plasma electrolytes and renal function panel (with creatinine and electrolytes)

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

This blood test measures key substances that help assess how well your kidneys are functioning and whether your body’s electrolyte balance is stable.

Quick summary

["Check kidney health and electrolyte levels in your blood."]

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

Key facts at a glance

LOINC
64339-5
Short code
HOMEDIALYSISPATIENTSWHORECOVEREDKIDNEYFUNCTION
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 tested for several important substances, including electrolytes like sodium, potassium, chloride, and bicarbonate, as well as creatinine—a waste product filtered by the kidneys. These measurements help determine how well your kidneys are removing waste and balancing fluids and minerals in your body.

Why It Matters for Home Dialysis Patients

For patients on home dialysis who have recovered kidney function, these tests are critical. They help monitor whether your kidneys are working effectively to maintain electrolyte balance and remove waste products, even after dialysis. Changes in these levels can signal potential issues that need attention.

How the Test Works

Blood is drawn from a vein, typically in your arm. The sample is then analyzed in a lab to measure the concentration of electrolytes and creatinine. Results are compared to standard ranges to identify any imbalances or kidney function concerns.

What the Results Mean

High or low levels of electrolytes (such as sodium, potassium, or chloride) or elevated creatinine can indicate kidney problems, dehydration, or other health issues. Your doctor will interpret the results in the context of your overall health and treatment plan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance for Recovery and Monitoring

Short name

Electrolytes & Kidney Function Panel

Frequently asked questions

How often should I expect this test?
The frequency depends on your kidney recovery progress and your doctor’s recommendations. Typically, it may be done more often at first to track changes, then less frequently as your kidneys stabilize. Follow your healthcare provider’s instructions for timing and scheduling.
What do abnormal results mean for my recovery?
Abnormal results may signal that your kidneys still need support or that electrolyte imbalances are developing. Your doctor will discuss next steps, which could include adjustments to your diet, medications, or dialysis schedule to help stabilize your levels.
Can I prepare for this test differently than a regular blood draw?
No special preparation is usually needed, but avoid heavy meals or strenuous activity before the test. If you’re on dialysis, ensure your last session was completed as scheduled to avoid fluid overload. Always follow your lab’s specific instructions.
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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