Used in biomedical research to quantitatively measure heparin cofactor II levels in human plasma or serum samples. This assay helps assess thrombotic risk and monitor coagulation disorders. Widely applied in studies related to cardiovascular diseases, deep vein thrombosis, and anticoagulant therapy. Supports research on endothelial function and hemostasis regulation. Suitable for use in clinical laboratories and research settings where precise detection of HCII concentration is required.