Lab Test

Acylcarnitine, Quantitative, Plasma

Quantitative Plasma Acylcarnitine, Plasma Acylcarnitine

Test Codes

EPIC: LAB5926, Beaker: XACYL, 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

  • Gross hemolysis.
  • Gross lipemia.
  • Gross icterus.

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:

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
LOINC:  14282-8

Contacts

Last Updated

11/30/2022

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