Laboratory Test Information Guide

Details for Long Chain Fatty Acids,Plasma/Serum

Test Name: Long Chain Fatty Acids,Plasma/Serum
Alternate Name(s): C24/C22 Long Chain Fatty Acid Ratio
C26/C22 Long Chain Fatty Acid Ratio
C26:0 Long Chain Fatty Acid Concentration
Very Long Chain Fatty Acids
LCFA
VLCFA
Laboratory: Toxicology/Special Chemistry
Specimen Type: 4 mL K2 or K3 EDTA Lavender top Vacutainer tube
or
5 mL Gold top Vacutainer
Collection Information: Minimum volume of serum or plasma required is 1.5 mL.

Spin and aliquot serum or plasma and freeze immediately and send to the lab.

Preferably patient should be fasting.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Once a week
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
15 days
Stat
N/A
 
Reference Range: 
C24/C22 Ratio:
0-1.094
C26/C22 Ratio:
0-0.0350
C26:0 Concentration:
0-1.466 umol/L
Effective Date: 2010-01-26
Revised Date: 2012-09-28
Critical Value:  
Interpretive Comments: This is a screening test for X-linked adrenoleukodystrophy
Affected males will have elevated parameters.
Heterozygous females usually have elevated parameters,
but they are often in the upper normal range.
Other peroxisomal diseases may also be detected by this test (elevated parameters).
Special Processing:  
Comments:  
Method of Analysis: Gas Chromatography
Critical Information Required:  
Storage & Shipment: Separate and freeze. Ship frozen and do not allow time to thaw.
System Codes: 
Cerner
LCFA
 
Referred To:  

Questions? Comments? Contact Laura Gopaul