Correlation between application of the Wells score and computed tomography angiography as predictor of pulmonary thromboembolism in adult patients hospitalized at a fourth-level university hospital over the period from January 2008 to November 2011
Correlación entre la aplicación de la escala de Wells y la angio-TAC como predictor de tromboembolismo pulmonar en pacientes adultos hospitalizados en un hospital universitario de cuarto nivel desde enero de 2008 hasta noviembre de 2011
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lntroduction: pulmonary thromboembolism is a relatively common cardiovascular emergency, whose impact is important dueto its high morbidity and mortality (up to 30%). Timely diagnosis and treatment can reduce mortality to 2%-10%; early diagnosis is therefore important because of its impact on prognosis.
Objective: to define the cut-off point on the Wells score with the greatest probability far predicting pulmonary thromboembolism in Colombia, using computed tomography angiography as gold standard.
Materials and methods: retrospective study with operatíonal characteristics, that included adult patients of a fourth-level university hospital over the period from January 2008 to November 2011, patients in whom computed tomography angiography was performed which confirmed pulmonary thromboembolism, by probability according to Wells score.
Results: the cut-off point on the Wells score with the highest yield in predicting pulmonary thromboembolism was 4,5.
Conclusions: the performance of all scores used as clinical pretests in clinical prediction is variable; variations depends on the population in which the score is applied and on the physician's expertise, taking into account that isolated signs or symptoms of pulmonary thromboembolism are unspecific and insensitive for reaching diagnosis. For this reason, we should apply our own scores or validate preexisting scores in our population.
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