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Acylcarnitine Profile

Item Value
Approval req'd? No
Available Stat? No
Test code ACYLP
Performed by Lucille-Packard Children's Hospital
Sendout? Yes
Method Stable Isotope Dilution LC-MS/MS
Container type Dark Green (Na-Heparin)
Amount to Collect 1 mL blood
Sample type Heparinized Plasma
Preferred volume 0.5 mL plasma
Min. Volume 0.3 mL plasma
Processing notes Freeze plasma at -20C. Order Acylcarnitine profile. Ship on dry ice Monday-Friday only by Stanford Courier to: Stanford University Medical Center Biochemical Genetics Laboratory
Normal range see table
Synonyms Acyl-carnitine; C14:1 Carnitine; ; Long chain fatty acid oxidation defect;
Turn around times Testing is batched, twice weekly. Turnaround time 1 week.
Additional information For possible fatty acid oxidation abnormalities undetected by urinary organic acid analysis. Note that reference ranges differ for plasma vs. serum. Note that no analytic standards are yet available for hydroxylic and dicarboxylic acylcarnitines; for these analytes (marked with a *), response ratios to internal standards are given instead. Urine acylcarnitine profiles are of no predictive values and will not be run unless approved by the reference laboratory director. Elevation of C14:1- and to a lesser extent of C16:1- and C18:1-carnitine esters is characteristic of deficient activity of long-chain acyl-coenzyme A dehydrogenase.
CPT coding 82017-90
LOINC code 43433-2
Last Updated 10/2/2010 11:51:14 AM
Entry Number 11
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