Methodology
Gass Chromatography/Tandem Mass Spectrometer
Synonyms
Fatty Acid; VLCFA; Peroxisomal Disorders; Phytanic Acid; X-ALD
Specimen Type
Serum
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB01304
Lab Test Days
Monday and Thursday
Standard TAT
4-8 Days
Collection Information
Specimen Required
1-2 mL Blood
Container Type
Red Top (No Additive)
Collection Instructions
Fasting Required (overnight fast). No alcohol consumption for 24 hours prior to draw. For pediatric patients, fasting is not required, but sample collection should occur prior to the next meal or scheduled feeding.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK
Specimen Stability
Room Temp: Unacceptable; Refrigerated: 7 Days; Frozen: 30 Days
Rejection Criteria
Hemolysis; Lipemic; Non-fasting samples; Serum separator tube (SST)
Test Volume Required
1 mL Serum
Minimum Test Volume
0.2 mL Serum
Included Tests
Phytanic Acid, Pristanic Acid, Docosanoic C22:0, Tetracosanoic C24:0, Hexacosanoic C26:0; Ratio C24/C22, Ratio C26/C22, Ratio Pristanic/Phytanic and Interpretation.
CPT Codes
82726
Revised
07-17-19
Initials
SL