Test Overview
Test Methodology

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

Test Usage

Evaluation of patients with clinical suspiccion of a wide range of inborn errors of metabolism, especially organic acidemias and fatty acid oxidation disorders including primary carnitine deficiency.

Reference Range *

Free Carnitine: 77 - 214 nmol/g creatinine; Total Carnitine: 180 - 412 nmol/g creatinine; Ratio (Acyl to Free): 0.7 - 3.4. Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Increased values are obtained after carnitine implementation or meat consumption. It is recommended that plasma concentrations be determined concurrently with urine collection.

Test Details
Days Set Up
Tuesday
Analytic Time

4 - 10 days

Soft Order Code
CARNU
MiChart Code
Carnitine, Urine (Mayo)
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo CARNU (81123)
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Collect random urine (no preservative) and freeze.

    Normal Volume
    1.5 ml random urine
    Minimum Volume
    0.5 ml random urine
    Additional Information

    Includes total, free, and ratio. Test sent to Mayo Medical Laboratories

    Billing
    CPT Code
    82379
    Fee Code
    AA237
    NY State Approved
    No