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Test Catalog

Test ID: ACRN    
Acylcarnitines, Quantitative, Plasma

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Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Specimen Type: Plasma

Collection Container/Tube:

Preferred: Green top (sodium heparin)

Acceptable: Lavender top (EDTA) or lithium heparin

Submission Container/Tube: Plastic vial

Specimen Volume: 0.1 mL

Collection Instructions: Draw specimen just prior to a scheduled meal or feeding.

Additional Information:

1. Patient's age is required.

2. Include family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information.

Forms: If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Biochemical Genetics Request Form (Supply T439)

Neurology Test Request Form (T732) (

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

0.04 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected


Mild OK; Gross OK


Mild OK; Gross OK


Mild OK; Gross OK



Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
VariesFrozen (preferred)92 days
 Refrigerated 64 days
 Ambient 8 days