Ammuratestoneql
This test detects the presence of ammonium urate in kidney or urinary stones to help determine stone composition and guide treatment.
{"Ammonium urate is a rare component of kidney stones","This test analyzes passed or surgically removed stones","Results help doctors recommend appropriate dietary and medical treatment","Stone analysis is typically ordered after a stone is expelled or removed","Knowing stone type helps prevent future stone formation"}
Key facts at a glance
- LOINC
- 44865-4
- Short code
- Amm Urate Stone Ql
- Synonyms
- Amm Urate Stone Ql
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 3.5
- Ref high
- 7.2
- 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 is this test?
The Ammonium Urate Stone Analysis test identifies whether ammonium urate is present in a kidney stone or urinary stone. Ammonium urate is a less common type of uric acid stone that forms when uric acid combines with ammonium, usually in urine that is unusually acidic. This test is performed on a actual stone sample that has been passed naturally or removed during a medical procedure.
How is the sample collected?
If you pass a stone naturally, it should be collected and stored in a clean container. If the stone is removed during surgery (such as ureteroscopy or lithotripsy), it will be sent to a laboratory for analysis. Your doctor will provide specific instructions on how to collect and transport the stone.
What do the results mean?
A positive result means ammonium urate was detected in your stone. This information helps your healthcare provider understand what type of stone you have formed, which is essential for recommending the right treatment and prevention strategies. Different stone types require different approaches to prevention and treatment.
How to prepare for this test?
There is no special preparation needed for the test itself. However, if you pass a stone at home, it is important to strain your urine to catch the stone for analysis. Drink plenty of water to help flush out any remaining stone fragments. Follow your doctor's instructions on how to preserve and deliver the stone sample.
Reference range
NCBI: Uric Acid Male 3.5-7.2 mg/dL; Female 2.5-6.8 mg/dLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Is this test painful?
Why is knowing the stone type important?
Can stone analysis prevent future stones?
How long does it take to get results?
What if my stone contains multiple types of crystals?
Sources
- 1
- 2
- 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 17, 2026. · Read our editorial policy