Laboratory Test Information Guide

Details for D-Dimer

Test Name: D-Dimer
Alternate Name(s):  
Laboratory: Core
Specimen Type: 2.7 mL Blue (3.2% Sodium Citrate) top Vacutainer

1.8 mL Blue (3.2% Sodium Citrate)
*In cases where access is difficult, a 0.9 mL Blue top tube is acceptable
Collection Information:  
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
4 hours
1 hour
Reference Range: See Interpretive Comments on report
Effective Date: 2010-06-02
Revised Date: 2017-11-28
Critical Value:  
Interpretive Comments: Caution:

D-Dimer: when used in patients with a low clinical probability of DVT or PE, a value of ≥500 g/L FEU (previously reported in DDU) is considered positive. In overt DIC, values over 3000 g/L are common. A D-Dimer result should never be used in isolation for the diagnosis of DVT or PE and must be interpreted in combination with the clinical probability.
Special Processing:  
Comments: Inpatient D-Dimer requests will not be performed routinely. These requests must be authorized by a Hematologist.

During regular working hours 0900-1700 contact Dr. M. Kovacs (pager 15182). After 1700 contact the on call Hematologist (pager 12222).

All other D-Dimer requests will be processed including Emergency departments, Outpatient Clinics, private Physician's Office and referring Institutions.
Method of Analysis: Turbidimetric Assay
Critical Information Required:  
Storage & Shipment: Blue (Sodium Citrate) top specimens are kept at 18-24 degrees Celsius.

Blue (Sodium Citrate) top specimens should be centrifuged and tested within 4 hours from the time of specimen collection.

Samples are discarded after 4 hours.
System Codes: 
Referred To:  

Questions? Comments? Contact Laura Gopaul