Supersaturation Profile, Urine
Also known as: SUPERSAT
Use
This test is used for kidney stone risk assessment and monitoring. It provides interpretation of data related to the formation of renal calculi. The panel includes various components such as calcium, chloride, citric acid, creatinine, magnesium, oxalate, pH, phosphorous, potassium, sodium, sulfate, and uric acid. The values assessed indicate the risk associated with the particular concentrations of these analytes, helping to predict the likelihood of kidney stone formation.
Special Instructions
The test requires a 24-hour urine collection and immediate freezing of the samples after processing. Use the Calculi Risk/Supersaturation Urine Collection Kit for optimal results. If the kit is unavailable, unadjusted aliquots may be used.
Limitations
This test does not include testing for magnesium ammonium phosphate (struvite) or cystine calculi. It is designed for predicting calcium oxalate, calcium hydrogen phosphate (brushite), and uric acid calculi formation only. It relies on the proper collection and handling of urine specimens over a 24-hour period, and deviations may affect results.
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 35678-2
- 35677-4
- 35676-6
- 35675-8
- 6874-2
- 35674-1
- 2162-6
- 30922-9
- 24447-5
- 35673-3
- 2779-7
- 3086-6
- 3087-4
- 6687-8
- 2128-7
- 2701-1
- 27222-9
- 2956-1
- 2829-0
- 2079-2
- 26888-8
- 26889-6
- 42673-4
- 42678-3
- 48767-8
- 34736-9
- 19153-6
- 30211-7
- 2756-5
- 11526-1
Result Turnaround Time
1-8 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
16 mL
Minimum Volume
16 mL
Container
Sulfamic acid tube, sodium carbonate tube, unpreserved tube depending on aliquot
Collection Instructions
Collect a 24-hour urine sample. Mix the entire collection and freeze four 4 mL aliquots using the designated tubes.
Patient Preparation
Refrigerate urine during the 24-hour collection period.
Storage Instructions
Freeze immediately after preparing aliquots. Maintain in a frozen state until analysis.
Causes for Rejection
Specimens not properly frozen or with improper volume or collection time.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | Unacceptable |
| Frozen | 2 weeks |