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HelpTest Code LAB429 Acylcarnitines, Quantitative, Plasma
Reference Values
Reference Range: See Acylcarnitine Reference Values
Critical Values: None established
Performing Laboratory
St. Louis Children's Hospital - Metabolic Genetics
Specimen Requirements
Patient Preparation: None
Container/Tube
Preferred: Mint green-top Lithium heparin (MNTGRN LiHep) tube
Acceptable: Green-top (Lithium Heparin) microtainer, Gold SST gel tube, Plain red-top tube, or DARK green-top (sodium heparin) tube
Collection Volume: 3.0 mL (minimum 0.6 mL) whole blood
If collected in microtainer, container MUST be full.
Submission Container/Tube: If specimen is coming from an outside facility, process specimen within 1 hour. Aliquot plasma/serum into a screw cap plastic vial and label with specimen type. Freeze aliquot and send on dry ice to keep frozen.
Special Instructions: Send to lab promptly.
Logistics
Day(s) Test Set Up: Monday-Friday
Cut-off time: Varies; batched once per day in a.m.
Turnaround Time: 3-5 days
Methodology
Electrospray Tandem Mass Spectrometry (ESI-MS/MS)
Additional Information
For SLCH Laboratory use only
Lab Processing Instructions: Centrifuge specimen to separate, aliquot sample into a plastic aliquot tube and freeze. Label aliquot with specimen type.
Processed Volume: 1.0 mL (minimum 0.3 mL) plasma/serum
Analyte Stability:
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood (unprocessed) | Ambient | 1 hour |
| Plasma/Serum (processed) | Refrigerated | NA |
| Ambient | 1 hour | |
| Frozen (preferred) | Indefinitely |
NOTES: None
Limitations
- NA
Last Reviewed
08/25
Sample Rejection
Mislabeled or unlabeled specimens
Test Classification and CPT Coding
82017
Test Classifcation: This test was developed and its performance characteristics determined by St. Louis Children's Hospital Clinical Laboratory. It has not been cleared or approved by the U.S. Food and Drug Administration.
LOINC
43433-2