PMID: 9164373May 26, 1997Paper

The use of D-dimer testing and impedance plethysmographic examination in patients with clinical indications of deep vein thrombosis

Archives of Internal Medicine
J GinsbergJ I Weitz

Abstract

To prospectively test the hypothesis that a diagnosis of deep vein thrombosis can be excluded in outpatients who present with clinical indications of deep vein thrombosis and whose results of D-dimer testing and impedance plethysmographic examination on the day of presentation are normal. Prospective cohort study. Four university-affiliated hospitals. Three hundred ninety-eight consecutive patients with clinical indications of deep vein thrombosis were included in the final analysis. All patients underwent an assessment of pretest probability, bedside D-dimer testing, and impedance plethysmographic examination. In most patients, if the results of D-dimer testing and impedance plethysmographic examination were negative for deep vein thrombosis, anticoagulants were withheld and patients were followed up for 3 months. If the results of one or both tests were abnormal, an examination using venous compression ultrasonography or phlebography was performed. In the majority of patients (69%), the results of D-dimer testing and impedance plethysmographic examination were normal. This combination had a negative predictive value of 98.5% (95% confidence interval, 96.3-99.6) for deep vein thrombosis. The results of the D-dimer assay and im...Continue Reading

Citations

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