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HelpTest Code DD D-Dimer
Specimen Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: Light Blue Top (3.2% Sodium Citrate)
Volume: 2.7mL Whole Blood (Tube must be full)
Collection Instructions: Send whole blood specimen to laboratory immediately.
Specimen Type: Platelet Poor Plasma
Container/Tube: Light Blue Top (3.2% Sodium Citrate)
Submission Container/Tube: Plastic Vial
Minimum Volume: 1.0mL Plasma
Collection Instructions:
1. Light blue top tube must be properly filled with whole blood.
2. Whole blood specimen should be double centrifuged and plasma separated from cells within 4 hours of collection.
3. Freeze the plasma in well-closed plastic tube immediately.
Reference Interval
< 0.44 ug/mL Fibrinogen Equivalent Unit (FEU)
Days and Times Performed
Monday through Sunday, TAT 1 day
Methodology
Immunoturbidimetric Assay
Service Code
12416
Update
Last updated 27/02/2022
Unacceptable Condition
| Haemolysis | Gross reject |
|---|---|
| Icterus | Gross reject |
| Lipaemic | Gross reject |
| Others | Clotted or insufficient reject |
Specimen Stability
**Preferred temperatures for storage prior to and during shipping to NUH**
| Specimen Type | Plasma |
|---|---|
| Ambient | 4 hours |
| Refrigerate | 4 hours |
| Frozen | 14 days |
Testing Laboratory
National University Hospital
Haematology, 67725320
Useful For
Aids in the diagnosis of disseminated intravascular coagulation. May aid in the assessment of an acute thromboembolic event. D-Dimer values <0.5 ug/mL (FEU) excludes the presence of acute venous thrombosis when there is low or moderate pretest probability. For Pulmonary Embolism, age-adjusted D-Dimer threshold can be considered.
Alias
D Dimer