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: There is an evidence-practice gap between guidelines for diagnosing pulmonary embolism (PE) and emergency physician practice. Computed tomography (CT) scanning is being overused to exclude PE in Canadian emergency departments (EDs) and current guidelines do not fit well with the ED model of patient care. There is a lack of research on patient opinions on PE testing, and a poor physician understanding of patient-specific goals in the ED. We are addressing this by conducting patient interviews to identify patient-specific values and opinions on PE testing in the ED. These will be used to develop patient-centered educational tools which physicians and patients can use to discuss the decision to order a CT PE scan. The aim of this study is to identify patient expectations and priorities on PE testing in the ED.  Methods : This qualitative study uses constructivist grounded theory to analyze patient values and opinions on PE testing in ED patients from two hospitals. Participants are screened by monitoring the ED patient tracker. If a patient is being tested for PE, they are approached and consented by a researcher to take part in a 30-minute semi-structured interview. Each interview is transcribed verbatim and independently analyzed by four researchers using constant comparative coding. The researchers meet weekly to compare codes and agree on common coding terms. The codes are grouped into themes, and the interview script is modified to maximize information on emerging themes. From this, major themes with associated subthemes will be derived, each representing an opportunity, barrier or value which must be addressed in our new patient education tools. We have performed 23 interviews and expect to reach theme saturation at 30 interviews. Full results will be available by the 2019 CAEP conference.  Results : From the patient interviews conducted so far, we have mapped four major themes: patient satisfaction comes from addressing their primary concern (for example, their pain); patients expect individualized care; patients prefer imaging over clinical examination when testing for PE; and patients expect 100% confidence from their ED physician when given a diagnosis.  Conclusion : These four domains will be used to create a new patient-centered approach to PE testing in the ED which will include physician education, patient information and organizational changes to patient processing. This study incorporates evidence-based medicine with ethical and social implications to improve patient outcomes.

LO23: Identifying patient values and expectations for pulmonary embolism CT scanning in the emergency department