D-dimer is a specific degradation fragment of cross-linked fibrin. High plasma D-dimer is an indicator of intravascular fibrin formation and plasmin-mediated fibrinolysis. Measurement of plasma D-dimer concentration is useful to aid in the diagnosis of systemic thrombosis, including pulmonary thromboembolism (PTE) and disseminated intravascular coagulation (DIC).
Quantitative D-dimer Assays
Quantitative D-dimer assays have replaced semi-quantitative methods in medical practice. When combined with clinical criteria, the finding of low D-dimer is useful for ruling out thrombosis and PTE early in the diagnostic work-up.
The Comparative Coagulation Laboratory is now offering a quantitative D-dimer test for animals in place of a semi-quantitative test method. A specific value, rather than concentration range, provides more precise monitoring for serial assessments of patient status. Testing algorithms that incorporate quantitative D-dimer may improve diagnostic accuracy for early identification of thrombosis
Submit at least 0.5 mL of citrate plasma, shipped overnight on a cold pack.
Test Turnaround and Costs
Same day reporting: the test is run daily (M-F) with results posted on-line (and faxed by request) as soon as the assay is complete
Plasma D-dimer is detected in an automated turbidometric immunoassay, using monoclonal antibodies bound to latex beads. Results are reported as D-dimer concentration (ng/mL) compared to a same-species standard. Quantitative D-dimer assays are routinely offered for dogs, cats, and horses. Please call for information on other species.
Freyburger G, Labrouche S. Comparabilty of D-dimer assays in clinical samples. Seminars in Vasc Medicine 2005;5:328-339.
Arnout J, Sales M, Arza B et al. Clinical management study of venous thromboembolism using HemosIL D-dimer. (abstr) ISTH, August 6-12, Sydney Australia, 2005.
Hart DJ, Hutchman G, Cuthbert RJG. Evaluation of an automated latex D-dimer immunoassay in the clinical assessment of suspected venous thromboembolism. Clin. Lab. Haem. 2002;24:171-174.
Stokol T, Brooks MB, Erb HN, Mauldin GE. D-dimer concentrations in healthy dogs and dogs with disseminated intravascular coagulation Am J Vet Res 2000;61:393-398.