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HelpTest Code LAB387 Cystine, Quantitative, Random, Urine
Additional Codes
LAB387
Performing Laboratory
St. Louis Children's Hospital
Lab Dept
Metabolic Genetics
Specimen Requirements
Specimen Type: Urine (random)
Container/Tube
Random: A clean, plastic urine container(s) with no preservative.
Acceptable: Clean, screw-cap container with no preservative.
Collection Volume: 5.0 mL (minimum of 1.0 mL)
Patient Preparation: Collect before intravenous pyelogram
Sample Rejection:
Specimens collected with acid as preservative.
Mislabeled or unlabeled specimens.
Special Instructions: See Urine Collection instructions
Logistics
Day(s) Test Set Up: Monday-Friday
Cut-off time: 0430
Turnaround Time: 1-3 days
Lab Testing Section: Metabolic Genetics
Interpretive
Reference Range:
< 30 days: ≤65 mcmol/mmol creatinine
1 mo - 6 months: ≤45 mcmol/mmol creatinine
6 months - 2 year: ≤30 mcmol/mmol creatinine
≥ 2 years: ≤10 mcmol/mmol creatinine
See See "Urine Amino Acids Reference Values"
Critical Values: None established
Limitations: NA
Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Test Classification: This test was developed and its performance characteristics determined by St. Louis Children's Hospital Clinical Laboratory. It has not been cleared or approved by the U.S. Food and Drug Administration.
Additional Information
For SLCH Laboratory use only
Lab Processing instructions: Mix specimen well and aliquot a small sample into a plastic conical vial for creatinine on chemistry analyzer. Place rest of specimen in Metabolic Genetics basket in freezer #1.
Processed Volume: 5.0 mL (minimum 1.0 mL) urine
Analyte Stability:
Ambient: NA
Refrigerated: NA
Frozen: NA
NOTES: Give the LUOCreat aliquot of specimen to chemistry bench to run Creatinine urine prior to freezing.
General Information
EPIC order name: Cystine, Urine, Quantitative, Random (EPIC Test # LAB387)
Cerner order name: Rnd Ur Cystine SLC
CPT Codes: 82131
LOINC Value: 13725-7A
Synonyms:
Last Reviewed
June 2024