Oral Renal Test Panel (24-Hour Collection)
This test measures key substances in your urine over 24 hours to assess how well your kidneys filter waste and balance fluids.
["Helps diagnose kidney function and fluid/ electrolyte imbalances over a full day’s output."]
Key facts at a glance
- LOINC
- 91393-9
- Short code
- ORT panel
- Synonyms
- ORT panel
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ort
- 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 Does This Test Measure?
Your urine is collected over 24 hours to measure several substances, including electrolytes like sodium and potassium, waste products like creatinine, and sometimes protein or calcium levels. These measurements help evaluate kidney function, fluid balance, and how well your body removes waste.
Why Might Your Doctor Order This Test?
Your doctor may recommend 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 in monitoring chronic conditions like heart failure or kidney disease.
What to Expect Before the Test
You’ll start collecting your urine in a special container at home, discarding the first morning urine. Continue collecting all urine for 24 hours, including overnight. Seal the container and bring it to your lab with a timeline log of when each sample was collected.
What to Expect During the Test
No special preparation is needed beyond the 24-hour urine collection. The lab processes the sample to analyze the measured substances, which may include chemical tests or specialized equipment to quantify each component.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal results may indicate kidney problems, such as reduced filtering ability, fluid retention, or electrolyte disorders. Elevated sodium or potassium could signal dehydration or kidney dysfunction, while abnormal creatinine levels may reveal impaired kidney function. This test helps guide treatment for conditions like hypertension, heart failure, or chronic kidney disease.
Short name
24-Hour Urine Renal Panel
Frequently asked questions
How long will I need to collect urine for this test?
Can I take medications or eat normally during urine collection?
What if I miss collecting urine at certain times?
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