Fatty Acid Profile, Essential, Serum
Order Name
FAPEP
Test Number: 6907817
Revision Date 01/29/2026
Test Number: 6907817
Revision Date 01/29/2026
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Fatty Acid Profile, Essential, Serum
|
Quantitative Gas Chromatography-Mass Spectrometry |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 0.5 mL (0.3 mL) | Serum | Clot Activator (SST or Red No-Gel) | Frozen |
| Alternate 1 | 0.5 mL (0.3 mL) | Plasma | EDTA (Lavender Top) | Frozen |
| Instructions | Specimen Type: Red Top tube or Serum Separator (SST), Lavender-top (EDTA) tube Specimen Storage and Transport: FREEZE (NOTE: The minimum volume 0.3mL does not allow for repeat testing) Centrifuge, transfer serum or plasma to a plastic transport tube and Freeze Immediately. Preferred: Plastic tube containing frozen serum Acceptable: Plastic tube containing: frozen serum obtained from gel-separated (SST) tube, frozen plasma obtained from EDTA lavender top Stability: Frozen <-10 C' 31 days. Patient Preparation: Patients should fast overnight (12-14 hours). Please note: Infants and individuals suspected of having a fatty acid oxidation disorder should not fast prior to testing because of the risk of acute metabolic decompensation. For these patients, collect the specimen immediately before feeding. If the patient is receiving total parenteral nutrition (TPN), the specimen can be collected under normal conditions. Patients must not consume any alcohol for 24 hours prior to collecting. Patient age is required as well as information regarding treatment, family history and tentative diagnosis. ?Cause for Rejection: Specimen thawed or not frozen; grossly lipemic or grossly hemolyzed specimen. |
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| GENERAL INFORMATION | |
|---|---|
| Expected TAT | 9 - 13 days |
| Clinical Use | Identification of patients with essential fatty acid deficiency, evaluation of nutritional status, and diet monitoring. |
| CPT Code(s) | 82542 |
| Internal Comments | JK 1/29/26 changing LCA from 821279 to 070325 Specimen Type: Red Top tube or Serum Separator(SST), Lavender-top (EDTA) tube, or Green top heparin tube Specimen Storage: FREEZE Specimen Collection: Patient must fast overnight for 12-14 hours. Patient must not consume any alcohol for 24 hours prior to collection. Patient age is required on the test request form. Include information regarding treatment, family history, and tentative diagnosis. Serum or plasma must be separated from cells within 45 minutes of venipuncture. Send serum or plasma in a plastic transfer tube. Special Instructions: Testing referred to ARUP Laboratories, Inc TC 2013518 Specimen Stability: Ambient: 48 hours, Refrigerated : 1 week, Frozen: 3 months |
| Service Provided By |  |
| Lab Section | Reference Lab |