Very Long Chain Fatty Acids + Phytanic Acids
Label Mnemonic: VLCFA
Epic Lab Code: LAB4240
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Plasma
Specimen Instructions:
Patient Must not consume alchol for 24 hours before collection.
Collection Medium:
Lavender top tube 3 mL (EDTA)
Minimum:
Preferred Minimum: 1.5 mL EDTA plasma following an overnight (12-14 hour) fast
Absolute Minimum: 0.5 mL EDTA plasma following an overnight (12-14 hour) fast
Delivery Instructions:
Keep at room temperature. Do not refrigerate.
Turn Around Time:
2 weeks upon receipt at reference laboratory
Reference Range:
C22:0 < or = 96.3 umol/L C24:0 < or = 91.4 umol/L C26:0 < or = 1.30 umol/L C24:0/C22:0 ratio < or = 1.39 C26:0/C22:0 ratio < or = 0.023 Pristanic Acid 0-4 mo: < or = 0.60 umol/L 5-8 mo: < or = 0.84 umol/L 9-12 mo: < or = 0.77 umol/L 13-23 mo: < or = 1.47 umol/L > or = 24 mo: < or = 2.98 umol/L Phytatanic Acid 0-4 mo: < or = 5.28 umol/L 5-8 mo: < or = 5.70 umol/L 9-12 mo: < or = 4.40 umol/L 13-23 mo: < or = 8.62 umol/L > or = 24 mo: < or = 9.88 umol/L Pristanic/Phytanic Acid Ratio 0-4 mo: < or = 0.35 5-8 mo: < or = 0.28 9-12 mo: < or = 0.23 13-23 mo: < or = 0.24 > or = 24 mo: < or = 0.39
Comments:
Note: Patient's age is required on request form for processing. Include information regarding treatment, family history, and tentative diagnosis.
Methodology:
Capillary gas chromatography/mass spectroscopy of pentafluorobenzyl bromide fatty acid esters.
CPT Code:
82726
 
See Additional Information:
Fasting Specimen Requirements