| Laboratory: | Clinical Biochemistry (METABOLIC) |
| Test Name: |
CYSTINE, Urine - (U)
Test Code:
AAQU
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| Clinical Information: |
Test Indications: This test is used for the diagnosis and monitoring of patients with cystinuria.
Cystinuria is an inherited disorder of amino acid transport characterized by excessive excretion of cystine, ornithine, lysine and arginine (COLA). Urolithiasis is caused by the relative insolubility of cystine in the urine which cause repeated stone formation. Symptoms often occur in childhood or early adult life, but cystinuria may become evident at any age. Cystine, ornithine, lysine and arginine are included in the urine amino acid profile offers in the Metabolic Lab. Please select "CYSTINE, U" in the urine section of the Biochemical Genetics Laboratory Requisition. Method: Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC/MS-MS) in Metabolic Lab (HSC). For questions/information: Call metabolic lab at 204-787-4530 and ask for the biochemical geneticist. |
| Collection Devices: |
Preferred Device:
Fresh random urine
No preservatives accepted. Please Note: Cystine analysis on 24 hour urine collection is not available. |
| Specimen Required: |
Urine: 10.0 mL
Pediatric Urine: 2.0 mL
Pediatric patient: If unable to get enough urine, please call the Metabolic Lab at 204-787-4530. |
| Referral: |
Send samples without delay to Metabolic Lab (HSC). Samples may be sent refrigerated if they will be received at HSC within 48 hours of collection, otherwise, urine should be sent frozen.
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| Requisition: | |
| Reference Values: | |
| Availability: |
Within 10 Days
If this analysis needs to be performed urgently, please communicate with the biochemical geneticist/ Metabolic Lab at 204-787-4530.
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| See Also: | |
| More Information: |
Keep sample refrigerated or frozen.
If you have any question, please communicate with the Metabolic Lab (HSC): 204-787-4530 |