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Lab Dept:
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Coagulation
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Test Name:
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D DIMER (FAIRVIEW UNIVERSITY)
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General Information
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Lab Order Codes:
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DDUM
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Synonyms:
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Fibrin D-Dimer
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CPT Codes:
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85379 – Fibrin degradation products, D-dimer; quantitative
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Test Includes:
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Fibrin D-Dimer reported in ugFEU/mL.
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Logistics
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Test Indications:
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Test for the D-dimer fragment of fibrin in plasma. D-dimer appears in plasma of patients with disseminated intravascular coagulation, deep vein thrombosis, and acute myocardial infarction.
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Lab Testing Section:
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Coagulation - Sendouts
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Referred to:
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Fairview University Medical Center
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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Results reported within 7 days, test performed once a week
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Special Instructions:
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None
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Specimen
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Specimen Type:
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Whole blood
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Container:
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Light Blue top tube (Buffered Na Citrate 3.2%)
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Draw Volume:
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4.5 mL (Minimum volume: 2.7 mL in 3 mL tube) blood
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Processed Volume:
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Specimen will be processed by the reference lab facility.
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Collection:
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Do Not use the first 2 mL’s of blood collected. For correct anticoagulant to blood ratio, place 2.7 mL’s of blood in a 3 mL tube or 4.5 mL’s of blood in 5 mL tube. If the patient’s hematocrit is >55%, contact laboratory to obtain a special tube. Mix thoroughly by gentle inversion.
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Special Processing:
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Lab Staff: Do Not process. If more than 24 hours is required for transport, contact laboratory for processing instructions. Ship at room temperature.
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Patient Preparation:
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None
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Sample Rejection:
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Improper tube, Clotted specimens, Underfilled tubes, Overfilled tubes, Mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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0.0 – 0.50 ugFEU/mL correlates to a negative qualitative test.
A quantitative D-dimer of 0.6 – 3.0 ugFEU/mL correlates to an FDP of 10 – 30 ug/mL.
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Critical Values:
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N/A
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Limitations:
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Elevated D-dimer levels are not specific for the presence of DIC or of deep vein thrombosis. False-positive or false-negative results may occur when attempting to confirm a diagnosis of DIC.
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Methodology:
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Optical
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References:
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Fairview University Laboratory Web Page http://labguide.fairview.org/diagnostic.asp
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Updates:
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5/24/2010: Tubing patient specimens is no longer prohibited.
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