View Test

Laboratory:

Clinical Biochemistry (METABOLIC)

Test Name:

FATTY ACID PROFILE, ESSENTIAL, SERUM - (P) (S)

Test Code: FAP

Clinical Information:

Test Indications: This test is used for:
- 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).

* Patient's age is required. Include information regarding treatment, family history and tentative diagnosis.

Restricted to: Manitoba Home Nutrition Program. Other requests need an approval - click here for Biochemistry Approval for Test Referral (F260-11-02).

Method: Gaz Chromatography Mass Spectrometry (GC-MS) Stable Isotope Dilution Analysis

Test performed: by Mayo Clinic Laboratories

For questions/information: Call Metabolic Lab at 204-787-4530 and ask for the Biochemical Geneticist.

Patient Preparation Instructions:
1) For nutritional assessment, patient should fast overnight (12-14 hours); for patients with a suspected fatty acid oxidation disorder, collect prior to next feeding as fasting is contraindicated.

In the case of a patient on total parenteral nutrition (TPN), specimen can be collected as normal.

2) Patient must not consume any alcohol for 24 hours before the specimen is collected.

Collection Devices:

Preferred Device:	1 - Li Heparin Plasma Separator Tube(s) - Full Tube Collection Li Heparin Plasma Separator Tube(s) - Full Tube Collection Manufacturer: BD (Becton Dickinson) Catalogue #: 367962
Alternate Device:	1 - Serum Separator (SST) Tube(s) - Full Tube Collection Serum Separator (SST) Tube(s) - Full Tube Collection Manufacturer: Becton Dickinson Catalogue #: 367986

Sodium Heparin, Lavender EDTA, Red top tube are also accepted.

Specimen Required:

Serum: 0.5 mL

Pediatric Serum: 0.5 mL

Pediatric: 0.5 mL (minimum 0.15 mL)
Centrifuge and aliquot into plastic vial. Store and keep frozen.

Stability: see below

Referral:

Centrifuge and aliquot into plastic vial. Store and send sample frozen to Metabolic Lab (HSC).
Send the requisition (or a clear copy) with the sample.
Stability: see below.

Requisition:

_SH Biochemistry Hematology Requisition (R250-10-92)

_SH Hospital Biochemistry Hematology Non Winnipeg Brandon (R250-10-91)

_SH Winnipeg Brandon Biochemistry Hematology Requisition (R250-10-94)

_SH Winnipeg Brandon Hospital Biochemistry Hematology Requisition (R250-10-93)

Reference Values:

An interpretative report will be sent.

Availability:

Within 2 Weeks

Available to Manitoba Home Nutrition Program Staff. Other requests need chemist approval.