D-Dimer
- Sample Type
- Standard
- Fasting
- No
- Unit
- µg/mL FEU
D-Dimer is a fibrin degradation product, a small protein fragment present in the blood after a blood clot is degraded by fibrinolysis. In a COVID-19 panel, D-Dimer serves as a critical biomarker for coagulopathy and disease severity. COVID-19 is associated with a hypercoagulable state; significantly elevated D-Dimer levels correlate with an increased risk of venous thromboembolism (VTE), disseminated intravascular coagulation (DIC), and poor clinical outcomes.
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Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
D-Dimer has high sensitivity but low specificity. Levels naturally rise with age, pregnancy, recent surgery, trauma, liver disease, and general systemic inflammation (common in COVID-19). An elevated D-Dimer does not 'diagnose' a blood clot but rather necessitates further imaging like a CTPA or Doppler ultrasound.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for D-Dimer:
Official Sources
- D-Dimer Test - Testing.comTesting.com
- D-Dimer Test: MedlinePlus Medical TestMedlinePlus
Research & Guidelines
- PubMed: D-Dimer Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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