Test Overview
Test Methodology
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Test Usage
Evaluation of cystinuria.
Reference Range *
CYSTINE: 3-15 years: 11 - 53 mcmol/24 hours; >=16 years: 28 - 115 µmol/24 hours. LYSINE: 3-15 years: 19 - 140 mcmol/24 hours; >=16 years: 32 - 290 mcmol/24 hours. ORNITHINE: 3-15 years: 3 - 16 mcmol/24 hours; >=16 years: 5 - 70 mcmol/24 hours. ARGININE: 3-15 years: 10 - 25 mcmol/24 hours; >=16 years: 13 - 64 mcmol/24 hours.
Test Details
Days Set Up
Monday - Friday
Analytic Time
4 - 6 days
Soft Order Code
CYSQN
MiChart Code
Cystinuria Profile, 24 HR Urine
Synonyms
- Arginine, Quantitative, Urine
- Cystine, Quantitative, Urine
- Lysine, Quantitative, Urine
- Ornithine, Quantitative, Urine
- CQN-ARGIN
- CQN-LYSINE
- CQN-ORNITH
- CQN-QUAL
- CQN-QUANT
- CYSTINE-Q
- ARGININE
- LYSINE
- ORNITHINE
- QUALITATIVE CYSTINE
- QUANTITATIVE CYSTINE
Laboratory
Sendout
Reference Laboratory
Mayo CYSQN (8376)
Section
Special Testing
Specimen Requirements
Collection Instructions
Collect 24 hour urine. Add 20 ml toluene as a preservative at the start of collection or refrigerate during collection and send frozen. Record total 24 hour urine volume and collection dates/times on request form.
Normal Volume
5 mL aliquot from 24 hour urine collection.
Minimum Volume
1 mL aliquot from 24 hour urine collection.
Additional Information
Test sent to Mayo Medical Laboratories.
Billing
CPT Code
82136
Fee Code
20463
NY State Approved
No