Serum or plasma substance concentration (unspecified analyte) measured by immunoassay (e.g., clia or fia)

What This Test Measures

This test measures the presence and concentration of a particular substance in your blood, such as antibodies, hormones, or proteins. The method used ensures highly accurate detection, often used to screen or confirm conditions like infections, autoimmune diseases, or hormonal imbalances.

Common Uses

Tests like this are commonly used to diagnose or monitor conditions such as infections (e.g., viral or bacterial), autoimmune disorders (e.g., lupus, rheumatoid arthritis), or to check for specific proteins that may indicate certain health risks or diseases.

How the Test Works

Your blood sample is processed to separate serum or plasma. The immunoassay method detects the target substance by binding to specific antibodies or probes, producing a measurable signal. This signal is then analyzed to determine the concentration of the substance.

Preparation for the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours if your test involves certain substances (e.g., hormones). Avoid smoking or consuming alcohol for a few hours before your blood draw.