Serum or plasma substance concentration (unspecified analyte) by immunoassay

What This Test Measures

An immunoassay detects and quantifies a specific substance in your blood. This method uses antibodies to identify and bind to the target molecule, allowing for precise measurement. The test may be used to screen for, confirm, or monitor conditions related to abnormal levels of proteins, hormones, or other biomarkers.

Common Uses

This type of test is often used in screening, diagnosing, or managing conditions such as infections, autoimmune diseases, hormonal imbalances, or certain cancers. It may also be part of routine monitoring for chronic illnesses.

Sample Collection and Preparation

Blood is drawn from a vein, typically in your arm. The sample is processed to separate serum (liquid part after clotting) or plasma (liquid part after anticoagulant use) for testing. The test may require fasting or specific timing instructions depending on the analyte.

Test Results Interpretation

Results are compared to reference ranges specific to the measured substance. Elevated or low levels may indicate underlying health issues, but interpretation depends on clinical context, including symptoms and other test results.