ARUP's Laboratory Test Directory

Carnitine, Free : 0080065

Mnemonic: CARN

Methodology: Tandem Mass Spectrometry
Performed: Tue-Sat
Reported: 1-4 days
Specimen Required: Collect: Green (sodium or lithium heparin). Also acceptable: Plain red.

Specimen Preparation: Separate serum or plasma from cells and freeze ASAP or within 2 hours of collection. Transfer 0.5 mL serum or plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.2 mL) Avoid hemolysis.

Storage/Transport Temperature: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions: Room temperature specimens. Specimens that have been refrigerated for greater than 12 hours.

Stability (collection to initiation of testing): After separation from cells: Ambient: Unacceptable; Refrigerated: 12 hours; Frozen: 1 month (avoid repeated freeze/thaw cycles)
Reference Interval:
Effective May 16, 2011
 
Age Free Carnitine
1-31 days 15-55 µmol/L
32 days-12 months 29-61 µmol/L
13 months-6 years 25-55 µmol/L
7 years-20 years 22-63 µmol/L
21 years or older 25-60 µmol/L

CPT Code(s): 83789
Cross References: L-Carnitine Free (Carnitine, Free)
 
 

 

 

 
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