|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:||Clotted samples.
|In the Lab:|
|Lab Solutions Code:||RFDP|
|Testing Schedule:||Analysed daily|
|Reference Interval & Interpretation:||Patient up to 50 years, the reference range will be <500 ng/mL
Patient 51 years and over, the reference range will be <(patientsí age x 10) e.g.
if patient is 55 years, the reference range will be <550.
When used for DVT/PE exclusion, the Innovance D-dimer assay has an age related
cut-off value and must be used in conjunction with a validated pretest probability
score (the modified Wells score is recommended).
It is only useful in patients assigned to the 'low probability' group in whom a
negative D-dimer essentially excludes DVT or PE.
An elevated D-dimer result is non-specific: it can occur in DIC, infection, post
surgery, during normal pregnancy, in malignancy and the cutoff increases with age
in normal persons.
|Stability Time Limit for Add-On Tests:||4 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 06/06/2017
Website last updated on 15/01/2018 07:29