CARNITINE, FREE AND TOTAL, URINE

Specimen Required
Collect random urine. Send 5.0 mL urine (2.0 mL minimum) frozen in a screw-capped plastic vial. CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Rejection Criteria
Refrigerated or room temperature specimens

Methodology
Tandem Mass Spectrometry

Stability
Room temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month

Reference Range
By report

Performed
Tuesday

Turnaround Time4-11 days
Test CodeCFTU
CPT-4 Code (s)
82379
LOINC Codes
Carnitine, Free, Urine:   17867-3  
Carnitine, Total, Urine:   17866-5  
Carnitine, Esterified, Urine:   28589-0  
Carnitine, E/F Ratio, Urine:   54442-9  

Warde
Medical
Laboratory