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Acylcarnitines, Quantitative, Plasma

Quantitative Plasma Acylcarnitine, Plasma Acylcarnitine

Test Codes

EPIC: LAB712, Beaker: Acylcar Plasma, MAYO: ACRN

Department

Send Outs

Instructions

The specimen should be collected just prior to a scheduled meal or feeding.

Specimen Collection Criteria

Collect (preferred specimen): One Dark Green-top Lithium or Sodium Heparin tube.

Also acceptable: One Lavender-top EDTA tube.

Physician Office/Draw Specimen Preparation

Centrifuge to separate plasma from cells. Transport plasma to a plastic transport tube and freeze (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 0.1 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 0.04 mL)

Rejection Criteria

• Specimens not collected and processed as indicated.

In-Lab Processing

Centrifuge to separate plasma from cells. Transport plasma to a plastic transport tube and freeze (-20°C/-4°F or below).

Transport: 0.1 mL plasma, frozen (-20°C/-4°F or below). (Minimum: 0.04 mL) 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 8 days
Refrigerated (2-8°C or 36-46°F): 64 days
Frozen (-20°C/-4°F or below): 92 days

Specimen Storage in Department Prior to Disposal: 1 month

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Medical Laboratories, Rochester, MN.

Performed

Monday – Friday.
Results available in 2-5 days.

Reference Range

By report.

Test Methodology

Flow Injection Analysis-Tandem Mass Spectrometry (FIA-MS/MS).

Interpretation

By report.

Clinical Utility

This assay aids in the diagnosis of fatty acid beta-oxidation disorders and several organic acidurias. In general, more than 20 inborn errors of metabolism can be identified using this method. For most of the disorders involving fatty acid beta-oxidation, this is the most informative screening test. Quantitative acylcarnitine analysis can also be used to evaluate the treatment during follow-up of patients with these disorders.

CPT Codes

82017

Contacts

Last Updated

6/12/2025