Widely Used Types and Clinical Applications of D-Dimer Assay

Area of Science:

• Clinical Chemistry
• Hematology
• Diagnostic Assays

Background:

• D-dimers are degradation products of fibrin, playing a key role in fibrinolysis.
• D-dimer testing is essential for diagnosing thrombotic events such as deep vein thrombosis (DVT), pulmonary embolism (PE), and disseminated intravascular coagulation (DIC).
• Current D-dimer assays predominantly employ monoclonal antibody technology.

Purpose of the Study:

• To review the methodologies and clinical applications of D-dimer assays.
• To highlight the importance of proper interpretation and clinical application of D-dimer test results.
• To discuss the caveats and considerations necessary for accurate D-dimer analysis.

Main Methods:

• Enzyme-linked immunosorbent assay (ELISA) as the central laboratory reference method.
• Development of rapid, point-of-care (POC) D-dimer assays utilizing diverse methodologies for acute care settings.
• Review of factors influencing D-dimer assay results.

Main Results:

• ELISA, while a reference method, is time-consuming.
• Numerous rapid POC D-dimer assays are available, employing various techniques.
• Accurate interpretation necessitates considering preanalytical variables, interfering substances, patient's drug therapy, and underlying conditions.

Conclusions:

• The diversity of D-dimer assays necessitates careful interpretation in both central laboratory and POC settings.
• Clinical validation, established cut-off values, and adherence to manufacturer recommendations are crucial for reliable D-dimer testing.
• Understanding and mitigating factors that can affect D-dimer levels are vital for appropriate clinical decision-making.