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Test Code DDIMR D-Dimer Sensitive Quantitative, LAB2810

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred: Full blue-top (sodium citrate) 1.8mL tube-Hemolyzed or short draw specimen in not acceptable.

Specimen Volume:100 µL of sodium citrate plasma 
Stability:  Specimens are stable at 18-24°C  when stored in primary tube and tested within 24 hours of collection.  Plasma may remain in primary tube but centrifugation is recommended.

Transport:  Specimens may remain in the primary tube unspun if testing will be completed the same day.

Collection Instructions: Centrifuge immediately after draw if not forwarded promptly. If there is a delay in transport of >24 hours, spin down, remove plasma from cells and freeze immediately in plastic vial. Send specimen frozen. Specimen stability is 2 weeks when frozen at ≤-20° C.

NOTE: Patient should not be on heparin or Coumadin.

NOTE:  Patients with a hematocrit of >55% must be recollected using an altered amount of sodium citrate.

Reference Values

0 - 0.5 µg/mL FEU

Values less than or equal to 0.5 µg/mL FEU indicate that deep vein thrombosis (DVT) or pulmonary embolism (PE) is highly unlikely.

 

Critical Value: >0.5 µg/mL FEU

 

Day(s) Test Set Up

Monday through Sunday

Useful For

The D-Dimer assay aids in the diagnosis of thromboembolic events.  Elevated concentrations of D-Dimer are indicative of the presence of a clot and are found in clinical conditions such as deep venous thrombosis (DVT), pulmonary embolism (PE), and disseminated intravascular coagulation (DIC).  D-Dimer levels rise during pregnancy and high levels are associated with complications.

Methodology

Latex Turbidimetry Immunoassay

Test Classification and CPT Coding

85378

Report Available

STAT within 1 hour of receipt

Routine within 2 hours of receipt