• J Am Coll Radiol · Aug 2019

    An Evaluation of Guideline-Discordant Ordering Behavior for CT Pulmonary Angiography in the Emergency Department.

    • Emma Simon, Isomi M Miake-Lye, Silas W Smith, Jordan L Swartz, Leora I Horwitz, Danil V Makarov, and Soterios Gyftopoulos.
    • Department of Population Health, NYU School of Medicine, New York, New York; Center for Healthcare Innovation and Delivery Science, NYU School of Medicine, New York, New York. Electronic address: emma.simon@nyumc.org.
    • J Am Coll Radiol. 2019 Aug 1; 16 (8): 1064-1072.

    PurposeThe aim of this study was to determine rates of and possible reasons for guideline-discordant ordering of CT pulmonary angiography for the evaluation of suspected pulmonary embolism (PE) in the emergency department.MethodsA retrospective review was performed of 212 consecutive encounters (January 6, 2016, to February 25, 2016) with 208 unique patients in the emergency department that resulted in CT pulmonary angiography orders. For each encounter, the revised Geneva score and two versions of the Wells criteria were calculated. Each encounter was then classified using a two-tiered risk stratification method (PE unlikely versus PE likely). Finally, the rate of and possible explanations for guideline-discordant ordering were assessed via in-depth chart review.ResultsThe frequency of guideline-discordant studies ranged from 53 (25%) to 79 (37%), depending on the scoring system used; 46 (22%) of which were guideline discordant under all three scoring systems. Of these, 18 (39%) had at least one patient-specific factor associated with increased risk for PE but not included in the risk stratification scores (eg, travel, thrombophilia).ConclusionsMany of the guideline-discordant orders were placed for patients who presented with evidence-based risk factors for PE that are not included in the risk stratification scores. Therefore, guideline-discordant ordering may indicate that in the presence of these factors, the assessment of risk made by current scoring systems may not align with clinical suspicion.Copyright © 2019 American College of Radiology. Published by Elsevier Inc. All rights reserved.

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