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D-Dimer Test

D-Dimer is a fibrin degradation product released when blood clots are broken down. Elevated D-Dimer indicates that clot formation and breakdown (fibrinolysis) is occurring, but it is not specific to any particular condition. It is most commonly used to help rule out venous thromboembolism (DVT/PE).

Doctor's Assessment Included

Reference Ranges

Female
ug/l
Normal < 500 High

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

Check your own value

D-Dimer: what this test measures

This test measures the concentration of D-Dimer fragments in your blood. These fragments are produced when cross-linked fibrin in blood clots is broken down by plasmin.

D-Dimer: why this value matters

A negative D-Dimer result is very useful for ruling out DVT and PE in patients with low-to-moderate clinical probability. However, D-Dimer can be elevated by many conditions and naturally rises with age.

D-Dimer: when is testing worthwhile?

D-Dimer is typically ordered when DVT or PE is suspected but clinical probability is not high. It is also used to monitor DIC and assess thrombotic risk. Consult your healthcare provider for guidance.

D-Dimer: symptoms of a high or low value

Low Levels

A normal D-Dimer strongly suggests that a significant blood clot is not present. This has a high negative predictive value, particularly in younger patients.

High Levels

Elevated D-Dimer can be caused by DVT, PE, DIC, surgery, trauma, infection, inflammation, pregnancy, cancer, and advanced age. It indicates clotting activity but cannot identify the specific cause.

D-Dimer: lifestyle and this value

D-Dimer levels are influenced by underlying conditions rather than lifestyle factors directly. Maintaining cardiovascular health through regular exercise, a healthy weight, and not smoking reduces overall thrombotic risk.

D-Dimer: frequently asked questions

Does an elevated D-Dimer mean I have a blood clot?
Not necessarily. D-Dimer can be elevated by many conditions. Its main clinical value is in ruling OUT clots when the result is normal.
Why does D-Dimer increase with age?
Age-related increases in background coagulation activity cause D-Dimer to naturally rise. Age-adjusted cut-offs (age x 10 mcg/L for those over 50) improve specificity in older patients.
Can D-Dimer be elevated during pregnancy?
Yes. D-Dimer progressively rises during normal pregnancy, making standard cut-offs unreliable. Pregnancy-specific reference ranges are used.

Test Products

This marker is included in the following test panels.

Fertility & Pregnancy

IVF Blood Test (Women)

Complete female IVF intake panel: ovarian reserve, thyroid, infectious screening, immunity serology, blood group and CBC.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€425,-
Fertility & Pregnancy

IVF Blood Test Complete (Women)

Everything in the IVF panel plus full thyroid, preconception nutrients, progesterone and CMV immunity.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Free T4 (Thyroxine) Folate (Folic Acid) Vitamin B12 Ferritin Progesterone Vitamin D (25-OH) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh TPO Antibodies CMV IgG Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€495,-

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D-Dimer

€31,-