Litholink 24-Hour Urine Cystine Profile
Also known as: Urine Cystine Panel
Use
This test is used for people with known cystinuria, cystine stone formers or patients who had a reported "positive" screen from the standard Litholink test, Litholink 24-Hour Urine, KS [910235].
Special Instructions
Not provided.
Limitations
The test was developed and its performance characteristics determined by Labcorp but has not been cleared or approved by the Food and Drug Administration. Results may be restricted by errors such as incorrect use of Litholink preservatives, samples too old (>96 hours), or collections outside the specified time range (26 hours).
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 3167-4 - Specimen vol 24h Ur
- 2179-0 - Cystine 24h Ur-mRate
- 2178-2 - Cystine Ur-mCnc
- 27378-9 - pH 24h Ur
- 2956-1 - Sodium 24h Ur-sRate
- 3096-5 - UUN 24h Ur-mRate
- 93746-6 - Protein catabolic rate 24h Ur-mRate
- 2162-6 - Creat 24h Ur-mRate
- 6874-2 - Calcium 24h Ur-mRate
- 2779-7 - Phosphate 24h Ur-mRate
- 6687-8 - Citrate 24h Ur-mRate
- 42673-4 - Ca H2 Phos dihyd 24h SatFr Ur
- 35654-3 - Creat/BW 24h Ur-RelMRat
- 77202-0 - Laboratory comment Report
- 11502-2 - Laboratory report
Result Turnaround Time
4-8 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
Two 40 mL aliquots
Minimum Volume
Two 40 mL per collection
Container
Green-top tube and orange-top tube
Collection Instructions
Collect urine over a continuous 24-hour period. Collect from the first morning void immediately and transfer 40 ml to each tube after adding Litholink preservative.
Storage Instructions
Keep at room temperature with preservative, do not refrigerate.
Causes for Rejection
Too old (>96 hours); under or over collected (26 hours); incorrect use of the Litholink preservative or the Litholink preservative not detected
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 4 days or 96 hours from end of collection |
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