D-Dimer

Laboratory Information

Test Name D-Dimer
Synonyms d dimer
External Price (excl. GST) $28.17

Specimen Collection

Patient Specimen Waikato and Thames - 2.7 mL sodium citrate tube (light blue)
Paediatric Specimen 1.8 mL paediatric sodium citrate tube (light blue)
Minimum Volume 500uL platelet poor plasma

Test Information

Department Haematology
Test Availability Mon - Sun, 24hrs
Laboratory Testing Time 1 hour
Method Innovance D-Dimer (Waikato), AQT D-Dimer (Taumarunui, Te Kuiti, Tokoroa). Reported as Fibrinogen Equivalent Units (FEU)
Reference Interval

DDimer cut off values

Age D-Dimer cut-off values
<50 years <500
>50 years Age x 10
Diagnostic Use Or Instructions

Laboratory Testing Guidelines recommendation:

D-dimer has limited specificity and will be positive in many hospitalised patients without VTE.

We recommend that testing should be restricted to those patients with a high enough clinical suspicion of VTE to merit further investigation, not to rule out the remote possibility of VTE:

Do a D-dimer only in patients with low to intermediate probability VTE (DVT/PE) where there is a high enough suspicion to justify further investigation for VTE by imaging.

Do not do a D-dimer in post-operative patients.

Electronic Information

Registration Code DIMER
HL7Mapping Code $DIMER
LOINC Code 30240-6