ACYLCARNITINE, URINE

test app

TEST NAME: ACYLCARNITINE, URINE

LAB DEPT: Core Lab Sendouts

SPECIMEN REQUIREMENTS

Specimen Type:	Urine, random
Container/Tube
Preferred/Acceptable:	Clean, dry, plastic screw-cap urine collection container.
Collection Volume:	5.0 mL (minimum 1.0 mL)
Patient Preparation:	If clinically feasible, discontinue L-carnitine supplementation at least 72 hours before specimen collection.
Sample Rejection:	Mislabeled or unlabeled specimens.
Special Instructions:	Send patient's family history, clinical condition (asymptomatic or acute episode), diet and drug therapy information with specimen. Send to lab promptly.

LOGISTICS

Test Availability:	Daily
Turnaround Time:	3-6 days
Test set-up:	Monday, Wednesday, & Friday
Lab Testing Section:	Send-outs
Referred to:	Mayo Medical Laboratories / Mayo test code used (C5DCU; C4U; or C5OHU) will be dependent upon acylcarnitine plasma (or newborn screen) results. Consult Medical Laboratory Director for which Mayo test needs to be ordered.

INTERPRETIVE

Reference Range:	test dependent
Critical Values:	None established
Limitations:	The results of urine acylcarnitines are not informative when the patient is receiving L-carnitine supplements.
Methodology:	Flow Injection Analysis - Tandem Mass Spectrometry (FIA-MS/MS)
Test Classification:	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.

ADDITIONAL INFORMATION

For SLCH Laboratory use only

Lab Processing instructions:	Transfer specimen to a 10-mL screw-capped plastic transport vial and place in dry ice to freeze immediately.
Processed Volume:	5.0 mL (minimum 1.0 mL) urine
Transport Temperature:	Frozen
Analyte Stability:	Ambient: NA Refrigerated: 24 hours Frozen: 7 days
Notes:	1.	There are three acylcarnitine urine test available at Mayo (C5-DC; C4; and C5-OH). Which one is ordered is dependent on acylcarnitine, plasma results. Contact Med Lab Director for which test should be ordered in MayoAccess.
	2.	Include patient's family history, clinical condition (asymptomatic or acute episode), diet and drug therapy information with specimen if supplied.

GENERAL INFORMATION

EPIC order name:	Miscellaneous Lab Test
Cerner order name:	Misc Ref SLC
CPT Codes:	82017
LOINC Value:	if C5DCU: 54279-5 if C4U: 53111-1 if C5OHU: 50091-8
Synonyms:
Last Updated: 06/22
Last Reviewed: 09/24