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HelpTest Code DD D-Dimer
Laboratory Code
LAB313
Specimen Requirements
Submit only one of the following specimens
Specimen Type: Whole Blood
Container/Tube: Light Blue Top (3.2% Sodium Citrate)
Volume: 2.7 mL 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: 1.0 mL 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 hrs of collection.
3. Freeze the plasma in well-closed plastic tube immediately.
Specimen Stability
| Specimen Type | Plasma |
|---|---|
| Ambient | 4 hours |
| Refrigerate | 4 hours |
| Frozen | 14 days (preferred) |
Methodology
Immunoturbidimetric Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Gross Icterus | Reject |
| Gross Lipaemia | Reject |
| Others: Clotted or insufficient specimen | Reject |
Reference Interval
< 0.44 ug/mL Fibrinogen Equivalent Unit (FEU)
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.
Service Code
12416
LOINC Code Information
48067-3
Alias
D Dimer
Update
Last updated 20/03/2025