CYSTINE, QUANTITATIVE

Specimen Required
Collect 24 hour urine, refrigerate during collection. Do not use preservative. Start collection after first morning void and collect through first morning void of the next day. Mix 24 hour collection well and send 2.0 mL urine (0.6 mL minimum) frozen in a screw-capped plastic vial. Record total volume on test requisition and specimen label.

Rejection Criteria
pH <2.0; IVP within 48 hours of collection

Methodology
Chromatography/Mass Spectrometry

Stability
Room temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 60 days

Reference Range
By report

Performed
Tuesday, Thursday

Turnaround Time6-10 days
Test CodeUCYS
CPT-4 Code (s)
82131
LOINC Codes
Date of Birth:   21112-8  
Total Volume:   2167-4  
Cystine:   13966-7  

Warde
Medical
Laboratory