CARNITINE EVALUATION (FREE AND TOTAL)

Specimen Required
Draw blood in a green sodium or lithium heparin tube. Centrifuge, separate and send 0.5 mL plasma (0.2 mL minimum) frozen within 2 hours in a screw-capped plastic vial. CRITICAL FROZEN.

Alternate Specimen
Serum: Red-top

Rejection Criteria
Sample not frozen within 12 hours

Methodology
Tandem Mass Spectrometry

Stability
Room Temperature: Unacceptable; Refrigerated: 12 hours; Frozen: 1 month

Reference Range
By report

Performed
Tuesday-Saturday

Turnaround Time5-7 days
Test CodeCARFT
CPT-4 Code (s)
82379
LOINC Codes
Carnitine Total   14288-5  
Carnitine Ester/free ratio   40869-0  
Carnitine Esterified   14282-8  
Carnitine free   14286-9  

Warde
Medical
Laboratory