title: Diagnostic accuracy of emergency physician performed graded compression ultrasound study in acute appendicitis: a prospective study.
abstract: OBJECTIVE
  Accurate early diagnosis of appendicitis can decrease its complications and minimize the mortality, morbidity and costs. This prospective study evaluates the accuracy of bedside emergency physician performed ultrasound study diagnosis in acute appendicitis.
  
  
  METHODS
  Patients who were suspicious to have appendicitis based on their clinical findings were included and underwent emergency physician performed ultrasound study. Then they were followed up until the recognition of final diagnosis based on pathology report or identification of an alternative diagnosis. Ultrasound studies were done by post-graduate year three emergency medicine residents or emergency medicine attending physicians who were attended in a 4 h didactic and practical course and with 7.5 MHz linear probe both in longitudinal and axial axes.
  
  
  RESULTS
  Ninety-seven patients were included and analyzed. 27 (27.8 %) of patients had appendicitis according to the results of emergency physicians performed ultrasound studies. 19 (70.37 %) of them had appendicitis according to their pathologic reports too. Forty-three (44.3 %) of patients had appendicitis according to pathology reports. Only 19 (44.18 %) of them were diagnosed by emergency physicians. Emergency physician performed ultrasound study had a sensitivity of 44.18 %, specificity of 85.18 %, positive predictive value of 70.37 %, negative predictive value of 65.71 % and overall accuracy of 67.01 % in diagnosing appendicitis in patients clinically suspicious to have acute appendicitis.
  
  
  CONCLUSIONS
  Emergency physician performed bedside ultrasound has an acceptable overall accuracy but its sensitivity is low thus it can help emergency physicians to diagnose the acute appendicitis when used in conjunction with other clinical and para-clinical evaluations but not per se.
authors.affiliation: Rasoul Akram Hospital, Iran University of Medical Sciences, Niyayesh St, Sattarkhan Ave, 14456 Tehran, Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Fathi
authors.affiliation: Emergency Medicine Department, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Seyyed Abbas
authors.initials: SA
authors.lastname: Hasani
authors.affiliation: Emergency Medicine Department, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad Amin
authors.initials: MA
authors.lastname: Zare
authors.affiliation: Emergency Medicine Resident, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Marzieh
authors.initials: M
authors.lastname: Daadpey
authors.affiliation: Emergency Medicine Resident, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Nader
authors.initials: N
authors.lastname: Hojati Firoozabadi
authors.affiliation: Emergency Medicine Resident, Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Daniyal
authors.initials: D
authors.lastname: Lotfi
keywords: Accuracy; Appendicitis; Diagnosis; Emergency physician performed ultrasound