|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
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 Solutions 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 mandatory.
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 hours|
|Link to Application and Diagnostic Use Website:||https://www.rcpa.edu.au/Library/Practising-Pathology/RCPA-Manual/Items/Pathology-Tests|
|Lab Contact:||Rebecca O'Toole|
Test Information last updated on 21/11/2016
Website last updated on 27/03/2017 08:32