Specimen

Plasma or Whole Blood

Collection Medium:

Alternate
Collection Media:

Lavender top tube (EDTA), Green top tube (Na Heparin)

Minimum:

Minimum: EDTA plasma or 1-3 mL whole blood EDTA following an overnight 
(12-14 hour) fast. Patient must not consume any alcohol for 24 hours 
before the specimen is drawn.

Delivery Instructions:

Keep at room temperature.  Do not refrigerate.

Analytic Time:

2 weeks

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