|Alternate Names for Test:||
FIBRINOGEN DEGRADATION PRODUCTS
|Specimen Collection Requirements:|
|Phlebotomist Instructions:||All D-Dimers are handled as urgent specimens. If requester has stated that the
D-Dimer test is urgent then phlebotomy team leader must be contacted by phone
(no voice messages) so specimen can be handled as a critical specimen &
immediate transportation arranged.
1x Blue (Sodium Citrate) tube 2.7mL
|Minimum Sample Volume:||TUBE MUST BE FULL.|
|Unacceptable Samples:||Underfilled tubes and clotted samples.
|In the Lab:|
|Lab Test Code:||RFDP|
|Testing Schedule:||Analysed daily|
|Reference Interval & Interpretation:||A D-Dimer level of <500ng/mL in a patient with a low Wells score indicates a
>95% negative predictive value for PE or DVT.
This result should not be used to exclude the diagnosis in patients with a
moderate or high probability of DVT (VTE) as imaging studies in these groups is
Note that there are high rates of false positivity of D-Dimers in selected
patient groups, e.g. pregnancy, active infection, post operative patients,
cancer and the elderly. D-Dimer testing may not be appropriate in these clinical
settings as its negative predictive value is reduced.
For any interpretative queries contact the Haematologist.
|Stability Time Limit for Add-On Tests:||8 hr at room temp|
|Link to Application and Diagnostic Use Website:||http://www.rcpamanual.edu.au/index.php?option=com_pttests&view=tests&Itemid=77|
|Lab Contact:||Alex Beavis and Dr Ken Romeril|
Test Information last updated on 2/04/2012
Website last updated on 14/04/2014 14:50