Serum or plasma substance concentration (qualitative) for a specific protein or marker detected via immunoassay

What This Test Measures

This test detects a specific substance in your blood using an immunoassay method. Immunoassays are highly sensitive and can identify very small amounts of substances, such as proteins, hormones, or other markers. The test may be qualitative, meaning it only tells you if the substance is present or not, rather than providing a precise measurement.

Why It’s Done

Your healthcare provider may order this test to screen for or confirm conditions related to the substance being tested. For example, it could be used to check for infections, autoimmune diseases, or other metabolic or hormonal imbalances. The specific reason will depend on your medical history, symptoms, or other tests performed.

Sample Collection and Preparation

A blood sample is typically collected from a vein in your arm. After drawing blood, it is sent to a lab where it is processed to separate serum or plasma. The test then analyzes this sample for the presence of the target substance using an immunoassay technique.

Possible Results and Interpretation

Since this test is qualitative, the results will either indicate a positive (substance present) or negative (substance not detected) finding. Your healthcare provider will interpret the result in the context of your overall health and medical history to determine if further action is needed.