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D-Dimer

Important Note

A D-Dimer can only be ordered once in a 12 hour period; additional orders within 12 hours will be canceled. Pathology approval is required to obtain subsequent levels within 12 hours. Please contact the laboratory for additional information.

eD-H Order Code

LAB313

Specimen Collection Information

Specimen Minimum Test Volume Container Special Handling
Blood 0.5 ML  

Specimen Transport Temperature

Double spin, separate, and freeze

Specimen Stability

4 hours

Additional Specimen Instructions

1.8 mL Sodium Citrate tube filled to the line.

OR

2.7 mL Sodium Citrate tube filled to the line.

 

If needed, 1mL sodium citrate tubes can be prepared by the laboratory.  These are a non-vacuum orange screw cap tube with lab prepared anticoagulant. To obtain some of these custom tubes please call the coagulation laboratory at 5-9463.

 

Blue top tubes must be filled within 10% of stated volume. A discard tube must be used if a citrate tube is to be drawn using a winged blood collection set. It is important to remove air from the blood collection set to ensure the proper blood volume is obtained in the coag tube.

 

If the patient has a known hematocrit >55%, please contact the coagulation lab for an adjusted collection tube before drawing the blood.

Reference Ranges / Critical Values

Assay Gender Age Range Normal Range Critical Values Units
D-Dimer All 0 Minutes – 15 Days   >20000 FEU ng/ml
    15 Days – 1 Months 445 -1200 >20000 FEU ng/ml
    1 Months – 6 Months 215 -878 >20000 FEU ng/ml
    6 Months – 1 Years 215 -844 >20000 FEU ng/ml
    1 Years – 6 Years 215 -780 >20000 FEU ng/ml
    6 Years – 11 Years 215 -567 >20000 FEU ng/ml
    11 Years – 18 Years 215 -580 >20000 FEU ng/ml
    18 Years – 150 Years 0 -500 >20000 FEU ng/ml
D-Dimer All 0 Minutes – 15 Days <215    
    15 Days – 1 Months <215    
    1 Months – 6 Months <215    
    6 Months – 1 Years <215    
    1 Years – 6 Years <215    
    6 Years – 11 Years <215    
    11 Years – 18 Years <215    
    18 Years – 150 Years <215    

Interpretive Data

Assay Display Interpretive Data
D-Dimer The D-Dimer assay is used to aid in the diagnosis of deep vein thrombosis and pulmonary embolism. A normal D-Dimer result (less than 500 FEU ng/ml) has a negative predictive value of approximately 95% for the exclusion of acute PE and DVT when there is low to moderate pretest probability. To use age adjusted cutoff: Age x 10 ng/ml.

Performing Lab Section

Hematology

CPT(s)

85379