PatientsVisitorsLocations & ServicesAbout the RegionJoin Our TeamPhysicians
Find:  Locations | Services
Pathology and Laboratory Medicine HomeTest and Services CatalogueTransfusion Medicine Product CataloguePolicy and ProcedureJob AidsSpecimen Collection and TransportRequisitionsAntibiogramsGenetic Testing and Molecular GeneticsMicrobiology EssentialsTransfusion EssentialsReference RangesLaboratory SuppliesAcute Care SCM GuidelinesContact InformationPhysician Access to Patient ResultsNew Clinic or Provider Information Changes
Pathology and Laboratory Medicine
Test Catalogue

Fatty Acid Profile, Essential


​​Ordering Recommendation
  • ​​Fasting overnight (12-14 hours)
  • Patient must not consume any alcohol for 24 hours before the specimen is collected
  • Fasting Acid Profiles ordered via the SCM ordering system (RUH) require the Acute Care Phlebotomy Requisition Form #101062

​Specimen Requirements​

  • ​Serum
​Collection Procedure
  • ​​Centrifuge within 45 minutes of collection
  • Must be frozen within 24 hours of collection
​Required Volume
  • ​Optimal Volume: 4.5 mL Full collection tube
  • Minimum Volume: 0.15 mL
    (Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
Grounds for Rejection​

Testing Information​ ​

  • ​Shipped weekly on Tuesdays
Testing Site​
  • ​Referred out by St. Paul’s Hospital Laboratory
Results Reporting​

  • One week turn around time by testing laboratory

​Clinical Interpretation
  • Evaluating the nutritional intake and intestinal absorption of essential fatty acids
  • Identifying deficiency of essential and other nutritionally beneficial fatty acids
  • Monitoring treatment of patients with essential fatty acid deficiencies who are receiving linoleic acid (C18:2w6) and alpha-linolenic acid (C18:3w3)

Alternate Test Names​
  • ​Essential fatty acid profile
SHR LIS Test Code​
  • ​FAPES (For Laboratory Use Only)
​ ​Test Ordering Requirements
​Preferred Specimen Collection
  • Refer patient to a Laboratory Health Services Centre or a Hospital Test Centre able to process specimens within required time frame 
​Forms Required


​If you choose to print this information, it is valid only on date of print.

Laboratory Controlled Document LSM-646 v5

Last Modified: Wednesday, November 27, 2019 |
Questions or feedback about this page?