Why the test is performed
To detect fragments produced when cross-linked fibrin clots are broken down.
World time
Laboratory Testing Online / Hematology
D-dimer
To detect fragments produced when cross-linked fibrin clots are broken down.Test profileHED-dimer
Test and specimen
What is being examined?
- Test
- D-dimer
- Department
- Hematology
- Typical sample or measurement
- Citrate plasma
Before the test
No special preparation is usually required. Urgent symptoms such as chest pain or severe breathlessness require emergency assessment, not online testing.
Clinical interpretation
Laboratory results should be interpreted by a qualified professional using the correct reference interval, method, symptoms, history and other findings. A normal or abnormal value rarely confirms or excludes a condition by itself.
What the test is used for
Mainly to help rule out venous thromboembolism in people with an appropriate low or intermediate clinical probability; it is not a stand-alone diagnosis.
How the test is performed
An immunoassay measures D-dimer in plasma. Results are interpreted with clinical prediction tools and assay-specific thresholds.
Conditions and diseases considered
Used in pathways for suspected deep-vein thrombosis or pulmonary embolism; levels may also rise with infection, inflammation, pregnancy, cancer, trauma or surgery.
Recommended further tests
Compression ultrasound, CT pulmonary angiography or other imaging when the clinical pathway requires it.
Primary public reference
Continue with the official patient guide.
COHSEW has summarised this information for navigation and awareness. Follow the source and your healthcare provider’s current instructions for the complete context.
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