Calculi Risk Assessment, Urine
Also known as: CRA
Use
The Calculi Risk Assessment, Urine test is used for assessing and monitoring kidney stone risk. It involves a panel of analytes including calcium, chloride, citric acid, creatinine, magnesium, oxalate, pH, phosphorus, potassium, sodium, and uric acid. These components help in identifying the concentrations of stone-forming substances in the urine, providing data relevant to stone formation prevention and management.
Special Instructions
Not provided.
Limitations
This profile does not include testing for magnesium ammonium phosphate (struvite) or cystine calculi. It is developed for assessment of stone-forming conditions like hypercalciuria, hyperuricosuria, and hyperoxaluria. It does not account for struvite stones associated with bacterial infections or cystine calculi linked to hereditary cystinuria, where other specific tests are recommended.
New York Approved
Methodology
Automated Analyzer
Biomarkers
LOINC Codes
- 35678-2 - Sodium ?Tm Ur-sCnc
- 35677-4 - Potassium ?Tm Ur-sCnc
- 35676-6 - Chloride ?Tm Ur-sCnc
- 35675-8 - Calcium ?Tm Ur-mCnc
- 6874-2 - Calcium 24h Ur-mRate
- 35674-1 - Creat ?Tm Ur-mCnc
- 2162-6 - Creat 24h Ur-mRate
- 30922-9 - Magnesium ?Tm Ur-mCnc
- 24447-5 - Magnesium 24h Ur-mRate
- 35673-3 - Phosphate ?Tm Ur-mCnc
- 2779-7 - Phosphate 24h Ur-mRate
- 3086-6 - Urate Ur-mCnc
- 3087-4 - Urate 24h Ur-mRate
- 6687-8 - Citrate 24h Ur-mRate
- 2128-7 - Citrate Ur-mCnc
- 2701-1 - Oxalate 24h Ur-mRate
- 27222-9 - Oxalate 24h Ur-mCnc
- 2956-1 - Sodium 24h Ur-sRate
- 2829-0 - Potassium 24h Ur-sRate
- 2079-2 - Chloride 24h Ur-sRate
- 19153-6 - Specimen vol ?Tm Ur
- 30211-7 - Specimen collect Time Spec
- 2756-5 - pH Ur
- 11502-2 - Laboratory report
Result Turnaround Time
1-7 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
24-hour urine
Minimum Volume
4 mL per aliquot
Container
Calculi Risk/Supersaturation Urine Collection Kit or alternative tubes as specified
Collection Instructions
Collect 24-hour urine, mix thoroughly, and immediately freeze in specified aliquots.
Patient Preparation
None specified, but ensure complete 24-hour collection.
Storage Instructions
Critical frozen, ensure specimens remain frozen during transport.
Causes for Rejection
No information provided.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | Unacceptable |
| Frozen | 2 weeks |
Other tests from different labs that may be relevant