Test Directory

• C18
• C18:1
• C4-Hydroxy
• C6
• C5-Dicarboxylic
• C18:2-Hydroxy
• C8
• C16
• C4
• C10:2
• C16:1
• C2
• C10:1
• C5
• C12
• C14:2
• C18:2
• C10
• C14:1
• C18-Hydroxy
• C14-Hydroxy
• C16:1-Hydroxy
• C16-Hydroxy
• C5:1
• C3-Dicarboxylic
• C18:1-Hydroxy
• C14
• C3
• C4-Dicarboxylic
• C5-Hydroxy

Used in the diagnosis and monitoring of inherited disorders of fatty acid oxidation and organic acidurias. May be used as a follow-up test to some abnormal newborn screen results.

Specimen Type: Plasma

Collection Container: Green Top (Sodium Heparin)

Desired Specimen Volume: 0.5 mL

1. Collect a green top (sodium heparin) tube via venipuncture.

1. Separate plasma from cells.
2. Transfer 0.5 mL of plasma to a LabCorp PP transpak frozen purple tube.
3. Freeze immediately. To avoid delays in turnaround time when requesting multiple tests on frozen specimens, please submit separate frozen samples for each test requested.

Transport to the laboratory frozen. 

• Specimen thawed or not frozen
• Gross hemolysis
• Specimen type other than frozen plasma

 See patient report.

False negative results can occur with acylcarnitine profiling, especially when the patient is carnitine deficient, is affected with a milder variant of a disorder, or when clinical condition or dietary supplementation causes secondary changes to the profile. Results of acylcarnitine profiling should be interpreted in the context of clinical presentation as well as other laboratory tests, which may include urine organic acid analysis and molecular testing.