Serum/plasma electrolytes and renal function profile (with creatinine clearance calculation)
This test measures key blood and urine chemistry values to assess your electrolyte balance, kidney function, and overall fluid status.
It helps doctors check how well your kidneys work and if your body has the right balance of fluids and minerals.
Key facts at a glance
- LOINC
- 64309-8
- Short code
- FULLTIMEREGISTEREDNURSESTAFFPOSITIONSVACANTATENDOFPERIOD
- 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
This panel typically includes measurements of electrolytes like sodium, potassium, chloride, and bicarbonate, which are critical for nerve and muscle function. It also evaluates kidney function through tests like blood urea nitrogen (BUN) and creatinine levels. Some versions may include a calculated creatinine clearance to estimate kidney function based on urine and blood samples.
Common Components
Electrolytes (e.g., sodium, potassium, chloride) are measured in serum or plasma to ensure proper fluid balance and cell function. Kidney function indicators (e.g., creatinine, BUN) assess how well your kidneys filter waste from your blood. Fluid balance markers may also be included to evaluate hydration status.
How It’s Performed
Blood is drawn from a vein, usually in your arm, and sent to a lab for analysis. Urine may also be collected for creatinine clearance calculations, depending on the specific test order.
When You Might Need It
Your doctor may order this test if you have symptoms like fatigue, swelling, confusion, or irregular heartbeat, or if you’re at risk for kidney issues, dehydration, or electrolyte imbalances.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal results can indicate conditions like dehydration, kidney disease, heart problems, or metabolic disorders. High or low electrolyte levels may cause muscle weakness, seizures, or heart rhythm issues. Early detection helps guide treatment to restore balance and protect your health.
Short name
None
Frequently asked questions
Why might my doctor ask for this test?
What does a ‘normal’ result mean?
How soon will I get my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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