Carnitine, Plasma

Abbrev Code:CARNPM   
Order Code:LAB6781Order Name:Carnitine, Plasma
Methodology:Flow injection analysis/Tandem mass spectrometry (FIA-MS/MS)
CPT Codes: 82379 x1
Turnaround Time:Specimens are sent to reference laboratory Mon-Fri; results are reported within 2-5 days.
Special Instructions:Recommended to only order when requesting acylcarnitines (LAB429) simultaneously, otherwise please order LAB3357.
Assay must have its own separate frozen tube.

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Collection Instructions

Optimal Volume:1 mL
Minimum\Peds Volume:0.6 mL
Container:Green (sodium heparin, no gel)
Alternate Containers: Purple (EDTA)
Causes for Rejection:Collected in a gel tube.

Processing and Shipping

Specimen Processing:Centrifuge and aliquot 0.5 mL, 0.2 mL minimum. Store frozen (preferred).
Shipping Instructions:Ship on dry ice.
Stability:7 days at room temperature; 21 days refrigerated; 60 days frozen.
Test Performed at or Referral Lab Lab Sendouts  (Mayo Medical Laboratories)
Referral Lab number:CARN


Reference Range:
Age Total Carnitine (TC)
Free Carnitine (FC)

Acyclcarnitine (AC)

AF/FC Ratio

< or = 1 d 23-68 12-36 7-37 0.4-1.7
2-7 d 17-41 10-21 3-24 0.2-1.4
8-31 d 19-59 12-46 4-15 0.1-0.7
32 d - 12 mo 38-68 27-49 7-19 0.2-0.5
13 mo - 6 y 35-84 24-63 4-28 0.1-0.8
7-10 y 28-83 22-66 3-32 0.1-0.9
11-17 y 34-77 22-65 4-29 0.1-0.9
>18 y 37-78 54-58 5-30 0.1-0.8
Use:Evaluation of patients with a clinical suspicion of a wide range of conditions including organic acidemias, fatty acid oxidation disorders, and primary carnitine deficiency.

Click HERE to Report test errors or omissions.
*If no email program is associated with this computer, please contact:
[email protected] for TestID: 5115"