Nephrology-guided kidney function profile with 24-hour urine collection
This test evaluates how well your kidneys filter waste and balance fluids over a full day by analyzing urine and blood markers.
["Assesses kidney health and fluid balance through urine and blood measurements over 24 hours."]
Key facts at a glance
- LOINC
- 36772-2
- Short code
- CT Guided Kidney NT place
- Synonyms
- CT Guided Kidney NT place
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- 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
The test includes measurements of electrolytes (like sodium and potassium), creatinine clearance—a key indicator of kidney function—and other substances that help assess how well your kidneys are processing waste and fluids. It also evaluates urine volume and concentration, which can reveal imbalances or kidney-related conditions.
Why It’s Done
Your doctor may order this test if you have symptoms like swelling, frequent urination, fatigue, or if they suspect kidney disease, fluid overload, or electrolyte imbalances. It’s also used to monitor chronic conditions like diabetes or heart failure.
Sample Collection Process
You’ll collect all urine for 24 hours in a special container, starting and ending with your first morning urine. Blood may also be drawn to measure certain markers. Follow your healthcare provider’s instructions precisely to ensure accurate results.
Common Conditions Monitored
This test helps diagnose or manage conditions like chronic kidney disease, kidney stones, fluid retention, or electrolyte disorders. It can also assess how well medications are affecting kidney function.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Elevated creatinine clearance or abnormal urine electrolytes may indicate kidney dysfunction, dehydration, or overhydration. Low urine volume or high sodium/potassium levels could signal kidney disease or other metabolic issues. Results guide treatment adjustments for conditions like heart failure or diabetes.
Short name
Kidney Function Profile (24-hour urine)
Frequently asked questions
How long will I need to collect urine for this test?
What if I miss a urine sample or have an accident?
Can I take medications or eat normally during urine collection?
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