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HelpTest ID NBLD0400 Cystinuria Profile, Quantitative, 24 Hour, Urine
Useful For
Diagnosis of cystinuria using 24-hour urine collections
Specimen Type
UrineNecessary Information
1. 24-Hour volume (in milliliters) is required.
2. Patient's age is required.
3. Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information.
Specimen Required
-Urine Tubes, 10 mL (T068)
-Diazolidinyl Urea (Germall) 5.0 mL (T822)
Specimen Volume: 5 mL
Collection Instructions:
1. Collect before intravenous pyelogram.
2. Add 5 g of diazolidinyl urea (Germall) as preservative at start of collection. If preservative is not available, refrigerate during collection.
3. Collect urine for 24 hours.
4. Mix well before taking 5-mL aliquot.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
24-Hour Urine Collection Instructions English
24-Hour Urine Collection Instructions Spanish
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 70 days | |
| Refrigerated | 14 days |
Day(s) Performed
Monday through Friday
Report Available
3 to 5 daysMethod Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82136
Reporting Name
Cystinuria Profile, QN, 24 hourReference Values
Cystine
3-15 years: ≤53 mcmol/24 h
≥16 years: ≤115 mcmol/24 h
Lysine
3-15 years: ≤140 mcmol/24 h
≥16 years: ≤290 mcmol/24 h
Ornithine
3-15 years: ≤16 mcmol/24 h
≥16 years: ≤70 mcmol/24 h
Arginine
3-15 years: ≤25 mcmol/24 h
≥16 years: ≤64 mcmol/24 h
Conversion Formulas:
Result in mcmol/24 hours x 0.24 =result in mg/24 h
Result in mg/24 hours x 4.17 =result in mcmol/24 h
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.Forms
If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.
Special Instructions
SANFORD LABORATORY INTERFACE BUILD INFORMATION
| Result Code | Result Code Description |
|---|---|
| 13449 | Collection Duration |
| 13450 | Urine Volume |
| 13456 | Cystine |
| 13457 | Lysine |
| 13458 | Ornithine |
| 13459 | Argininge |
| 13461 | Reviewed By |