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Uranium/Creatinine Ratio, Urine

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

Measures the amount of uranium in urine relative to creatinine, which helps account for differences in urine concentration.

Quick summary

["This test evaluates urinary uranium exposure while adjusting for how concentrated the urine sample is."]

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

Key facts at a glance

LOINC
110465-2
Short code
Uranium/Creat Msmt Ur
Synonyms
Uranium/Creat Msmt Ur
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

This test measures uranium in a urine sample and compares it with the amount of creatinine in the same sample. Creatinine is used as a marker of urine concentration.

Why might I need this test?

It may be used to assess exposure to uranium, including after workplace exposure or during treatment monitoring. The result can help determine whether further evaluation is needed.

How is the test performed?

A urine specimen is collected and analyzed in the laboratory. The laboratory reports the amount of uranium relative to the amount of creatinine in that specimen.

How do I prepare for the test?

Follow your clinician's instructions about collection timing and amount. If a 24-hour collection is requested, collect all urine for the specified period and record the start and end times; fasting is usually not required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urinary Uranium/Creatinine Ratio

Frequently asked questions

What does the urine uranium/creatinine ratio tell me?
It estimates urinary uranium relative to urine concentration. This makes results easier to compare when urine samples differ in how dilute or concentrated they are.
Is this the same as a 24-hour urine test?
It may be measured from a spot urine sample or from urine collected over 24 hours, depending on the order. The collection instructions from your clinician determine which method is used.
Do I need to avoid uranium before the test?
Do not change your work, medication, diet, or supplement routine unless your clinician tells you to. Tell the laboratory if you may have recently handled uranium or another material containing it.
  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