Dodecenoyl carnitine concentration (Carnitine acyl ester)

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms of a metabolic disorder, such as unexplained muscle weakness, fatigue, or developmental delays in children. It could also be part of a broader evaluation for conditions affecting fatty acid metabolism, such as carnitine palmitoyltransferase (CPT) deficiencies.

What to Expect Before the Test

No special preparation is typically required, but you may be asked to fast for a few hours before the blood draw if the test involves serum or plasma. Always follow your provider’s instructions.

How the Test Is Performed

A small sample of blood is taken from a vein in your arm using a needle. The sample is then sent to a lab for analysis using high-performance liquid chromatography (HPLC) to measure the concentration of dodecenoyl carnitine.

What the Results Mean

Results are usually reported as a concentration value (e.g., micromoles per liter). Elevated levels may suggest an inability to metabolize certain fatty acids properly, while lower levels could indicate other metabolic issues. Your provider will interpret the results in the context of your symptoms and overall health.