Diagnosing DVT in the Emergency Department: Combining Clinical Predictors, D-dimer and Bedside Ultrasound

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dc.contributor.authorBlecher, Gabriel E.
dc.date.accessioned2013-04-05T13:35:15Z
dc.date.available2013-04-05T13:35:15Z
dc.date.created2013
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/10393/24003
dc.identifier.urihttp://dx.doi.org/10.20381/ruor-2910
dc.description.abstractI assessed the accuracy of two clinical prediction rules, the d-dimer blood test and point of care ultrasound for diagnosing lower limb deep vein thrombosis. Emergency physicians were trained in ultrasound and prospectively scanned emergency department patients with suspected deep vein thrombosis. Accuracy of the Wells and AMUSE rules and the ultrasound result was compared to radiology-performed ultrasound and a 90-day clinical outcome. Univariate and multivariate analyses were performed assessing which factors were associated with the outcome. The sensitivity and specificity of the Wells score for the clinical outcome was 85.7% and 68.5%; the AMUSE score 85.7% and 54.4%. Ultrasound had a sensitivity of 91.7% and specificity of 91.7% for radiology-diagnosed thrombus and 78.6% and 95.0% for clinical outcome. The odds ratio of a positive outcome with a positive ultrasound was 65.1. After receiving the ultrasound training program, emergency physicians were unable to demonstrate sufficient accuracy to replace current diagnostic strategies. 
dc.language.isoen
dc.publisherUniversité d'Ottawa / University of Ottawa
dc.subjectultrasound
dc.subjectdiagnostic accuracy
dc.subjectcohort study
dc.subjectprospective
dc.subjectdeep vein thrombosis
dc.subjectemergency department
dc.titleDiagnosing DVT in the Emergency Department: Combining Clinical Predictors, D-dimer and Bedside Ultrasound
dc.typeThesis
dc.faculty.departmentÉpidémiologie et médecine sociale / Epidemiology and Community Medicine
dc.contributor.supervisorStiell, Ian
dc.contributor.supervisorWells, George
dc.embargo.termsimmediate
dc.degree.nameMSc
dc.degree.levelmasters
dc.degree.disciplineMédecine / Medicine
thesis.degree.nameMSc
thesis.degree.levelMasters
thesis.degree.disciplineMédecine / Medicine
uottawa.departmentÉpidémiologie et médecine sociale / Epidemiology and Community Medicine
CollectionThèses, 2011 - // Theses, 2011 -

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