Sign in →

Test Code C5DCU C5-DC Acylcarnitine, Quantitative, Random, Urine

Important Note

SAMPLE ONLY HAS 7 DAYS STABILITY TO REACH MAYO LABORATORIES.
Do not collect specimen on Fridays through Sundays, eve of public holidays and public holidays.

Additional Codes

Epic Ordering Code LAB3041444
NBS code LBC03371
Service code 36968

Reporting Name

C5-DC Acylcarnitine, QN, U

Specimen Type

Urine


Ordering Guidance


This second-tier test is used specifically to evaluate a newborn screening elevation of glutarylcarnitine and must not be ordered with either C4U / C4 Acylcarnitine, Quantitative, Random, Urine or C5OHU / C5-OH Acylcarnitine, Quantitative, Random, Urine.

 

For general screening for metabolic disorders, see OAU / Organic Acids Screen, Random, Urine; ACRN / Acylcarnitines, Quantitative, Plasma; and AAQP / Amino Acids, Quantitative, Plasma.



Necessary Information


Patient's age, family history, clinical condition (asymptomatic or acute episode), diet, and drug therapy information is requested but not required.



Specimen Required


Patient Preparation: If clinically feasible, discontinue L-carnitine supplementation at least 72 hours before specimen collection.

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 10-mL urine tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. Freeze specimen immediately.


National University Hospital-Singapore Note:

NUH Outreach Laboratories:
Specimen Requirements
Submit the following immediately:
Container: Random Urine Container without preservatives
For NUH Patients:
Place specimen on ice and send to the lab immediately.
For non-NUH Patients: 
Place specimen on ice and send to the lab immediately. Specimen should arrive at NUH lab within 24 hours after collection. Otherwise, freeze the specimen immediately. Deliver to NUH lab on dry ice. 
Processing Requirements
Aliquot urine into Mayo urine tube and freeze immediately.
Specimen type: Urine
Volume: 5 mL
Storage/transport requirements: Frozen

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Frozen (preferred) 7 days
  Refrigerated  24 hours

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Method Name

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

Day(s) Performed

Monday, Wednesday, Friday

Report Available

2 to 5 days
National University Hospital-Singapore Note:

Please note that this is a referral test requiring transport to the external testing facility and an additional 3-5 days is required.

Reference Values

<1.54 millimoles/mole creatinine

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Evaluation of patients with an abnormal newborn screen showing elevations of glutarylcarnitine

 

Diagnosis of glutaric aciduria type 1 deficiency

CPT Code Information

82017

LOINC Code Information

Test ID Test Order Name Order LOINC Value
C5DCU C5-DC Acylcarnitine, QN, U 54279-5

 

Result ID Test Result Name Result LOINC Value
88831 C5-DC Acylcarnitine, QN, U 54279-5
28126 C5-DC Interpretation 59462-2
34470 Reviewed By 18771-6

Secondary ID

88831

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.
National University Hospital-Singapore Additional Information:

Last updated 06/07/2026