D Dimer

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Assay

D Dimer

Key Words

DDIMER, Deep Vein Thrombosis, DVT, Pulmonary Embolism, PE, Disseminated Intravascular Coagulation, DIC

Specimen Collection

3.0ml Citrate (Green lid). 1.4ml Citrate for paediatric (Green lid). Fill to mark.

Turnaround time

Less than 8 hours. Samples older than 24 hours on receipt cannot be processed.

Test indications

Investigation of Deep Vein Thrombosis/Pulmonary Embolism, and Disseminated Intravascular Coagulation (DIC).

Interferences

Pregnancy, lipaemia, haemolysis, infection and inflammation.

Reference Range

<243ng/ml. For patients aged 50 and over presenting with suspected VTE in line with NICE guidelines 2020 NG158: Please use clinical presentation, calculate the Wells score and consider an age-adjusted cut-off threshold for D Dimers (patient age x 5), instead of the stated cut-off value. Adult reference range established in-house from reagent manufacturer.

Minimum retesting interval

D Dimer requests that are made within 5 days of a previous request on a patient are intervened unless investigating DIC.