Serum or plasma concentration of a substance measured by immunoassay (tetramethylbenzidine-based)

What This Test Measures

The test detects the presence and amount of a particular substance in your blood, likely a protein or biomarker. The method used (tetramethylbenzidine-based immunoassay) is highly sensitive and accurate for detecting even small amounts. This could be related to inflammation, infection, autoimmune diseases, or other metabolic processes.

Why It Might Be Ordered

Your healthcare provider may order this test to investigate symptoms like unexplained fatigue, organ dysfunction, or to monitor chronic conditions such as kidney disease, liver issues, or certain cancers. It could also be part of routine screening or follow-up for known conditions.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The blood is processed to separate serum (liquid part after clotting) or plasma (liquid part before clotting). This sample is then analyzed in a lab using the immunoassay method to measure the target substance.

Common Conditions Monitored

Elevated or low levels of this substance may indicate underlying health issues, such as infections, inflammatory diseases, or certain cancers. For example, it could be used to monitor proteins like CRP (C-reactive protein) or other biomarkers tied to immune response or organ function.