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Test Code FAPMTSO Fatty Acid Profile, Mitochondrial (C8-C18), Serum

Additional Codes

Mayo Test Code: FAPM

Reporting Name

Fatty Acid Profile, Mitochondrial,S

Useful For

Biochemical diagnosis of inborn errors of mitochondrial fatty acid oxidation, including deficiencies of medium-chain acyl-Co-A dehydrogenase, long-chain 3-hydroxyacyl-Co-A dehydrogenase, very long-chain acyl-Co-A dehydrogenase, and glutaric acidemia type 2

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Necessary Information


1. Patient's age is required.

2. Include information regarding treatment, family history, and tentative diagnosis.



Specimen Required


Patient Preparation:

1. Fasting:

    a. For nutritional assessment: 12 hours, required

    b. For patients with a suspected fatty acid oxidation disorder, prolonged fasting is contraindicated. Collect as close to the patient's next scheduled meal/feeding as possible.

2. Patient must not consume any alcohol for 24 hours before the specimen collection.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred:  Serum gel

Acceptable:  Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

0.15 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Frozen (preferred) 92 days
  Refrigerated  72 hours

Reference Values

Octanoic Acid, C8:0

<1 year: 7-63 nmol/mL

1-17 years: 9-41 nmol/mL

≥18 years: 8-47 nmol/mL

 

Decenoic Acid, C10:1

<1 year: 0.8-4.8 nmol/mL

1-17 years: 1.6-6.6 nmol/mL

≥18 years: 1.8-5.0 nmol/mL

 

Decanoic Acid, C10:0

<1 year: 2-62 nmol/mL

1-17 years: 3-25 nmol/mL

≥18 years: 2-18 nmol/mL

 

Lauroleic Acid, C12:1

<1 year: 0.6-4.8 nmol/mL

1-17 years: 1.3-5.8 nmol/mL

≥18 years: 1.4-6.6 nmol/mL

 

Lauric Acid, C12:0

<1 year: 6-190 nmol/mL

1-17 years: 5-80 nmol/mL

≥18 years: 6-90 nmol/mL

 

Tetradecadienoic Acid, C14:2

<1 year: 0.3-6.5 nmol/mL

1-17 years: 0.2-5.8 nmol/mL

≥18 years: 0.8-5.0 nmol/mL

 

Myristoleic Acid, C14:1

<1 year: 1-46 nmol/mL

1-17 years: 1-31 nmol/mL

≥18 years: 3-64 nmol/mL

 

Myristic Acid, C14:0

<1 year: 30-320 nmol/mL

1-17 years: 40-290 nmol/mL

≥18 years: 30-450 nmol/mL

 

Hexadecadienoic Acid, C16:2

<1 year: 4-27 nmol/mL

1-17 years: 3-29 nmol/mL

≥18 years: 10-48 nmol/mL

 

Palmitoleic Acid, C16:1w7

<1 year: 20-1,020 nmol/mL

1-17 years: 100-670 nmol/mL

≥18 years: 110-1,130 nmol/mL

 

Palmitic Acid, C16:0

<1 year: 720-3,120 nmol/mL

1-17 years: 960-3,460 nmol/mL

≥18 years: 1,480-3,730 nmol/mL

 

Linoleic Acid, C18:2w6

≤31 days: 350-2,660 nmol/mL

32 days-11 months: 1,000-3,300 nmol/mL

1-17 years: 1,600-3,500 nmol/mL

≥18 years: 2,270-3,850 nmol/mL

 

Oleic Acid, C18:1w9

<1 year: 250-3,500 nmol/mL

1-17 years: 350-3,500 nmol/mL

≥18 years: 650-3,500 nmol/mL

 

Stearic Acid, C18:0

<1 year: 270-1,140 nmol/mL

1-17 years: 280-1,170 nmol/mL

≥18 years: 590-1,170 nmol/mL

Day(s) Performed

Monday through Friday

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82725

LOINC Code Information

Test ID Test Order Name Order LOINC Value
FAPM Fatty Acid Profile, Mitochondrial,S 43675-8

 

Result ID Test Result Name Result LOINC Value
17007 Octanoic Acid, C8:0 35145-2
17008 Decenoic Acid, C10:1 35147-8
17009 Decanoic Acid, C10:0 35146-0
17010 Lauroleic Acid, C12:1 35151-0
17011 Lauric Acid, C12:0 35150-2
17012 Tetradecadienoic Acid, C14:2 35148-6
17013 Myristoleic Acid, C14:1 35158-5
17014 Myristic Acid, C14:0 35157-7
17015 Hexadecadienoic Acid, C16:2 35154-4
17016 Palmitoleic Acid, C16:1w7 35162-7
17017 Palmitic Acid, C16:0 35161-9
17018 Linoleic Acid, C18:2w6 35165-0
17019 Oleic Acid, C18:1w9 35166-8
17020 Stearic Acid, C18:0 35149-4
17055 Interpretation 59462-2

Cautions

For nutritional assessment, a 12- to 14-hour fast is required; however, patients suspected of having a fatty acid oxidation disorder should not fast before testing due to the possibility of acute metabolic decompensation. Instead, collect the specimen after the longest fast possible, just before feeding. In the case of a patient on total parenteral nutrition, specimen can be collected as normal.

Report Available

3 to 5 days

Specimen Retention Time

2 months

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Method Name

Gas Chromatography Mass Spectrometry (GC-MS) Stable Isotope Dilution

Testing Algorithm

For more information see Epilepsy: Unexplained Refractory and/or Familial Testing Algorithm