title: Emergency ultrasound of the gall bladder: comparison of a concentrated elective experience vs. longitudinal exposure during residency.
abstract: BACKGROUND
  It is unknown how an intensive emergency ultrasound (EUS) experience compares with comparable exposure done over the course of residency training.
  
  
  OBJECTIVE
  Our objective was to compare the accuracy of EUS of the gall bladder done by physicians after a 2-week EUS elective with similarly numbered examinations done by physicians longitudinally over several years of residency training.
  
  
  METHODS
  This was a secondary analysis of a previously reported prospective study of EUS for biliary disease. The 21(st)-40(th) examinations were compared between those who participated in an EUS elective and those who did not. The gold standard was ultrasound done by the Department of Radiology.
  
  
  RESULTS
  Mean time to complete 40 EUS examinations for biliary disease was 14 months for those participating in an EUS elective compared with 29 months for those who did not. One hundred and ninety-one examinations (49%) were done by 19 operators who did not participate in an EUS elective and 202 examinations (51%) were done by 23 operators who completed an EUS elective. There was no statistical difference between the two groups with regard to detecting the presence of gall stones, gall bladder wall thickening, pericholecystic free fluid, ductal dilation, or sludge.
  
  
  CONCLUSIONS
  Physicians who participated in a 2-week, semi-structured EUS elective demonstrated EUS accuracy for biliary disease that was comparable with those who performed the same number of examinations over a longer period of time.
authors.affiliation: Department of Emergency Medicine, David Geffen School of Medicine at UCLA, Olive View Medical Center, Sylmar, California 91342, USA.
authors.forename: Timothy B
authors.initials: TB
authors.lastname: Jang
authors.forename: Wendy
authors.initials: W
authors.lastname: Ruggeri
authors.forename: Amy H
authors.initials: AH
authors.lastname: Kaji
mesh_terms: D002764:Cholecystitis / Q000000981:diagnostic imaging*; D002769:Cholelithiasis / Q000000981:diagnostic imaging*; D002983:Clinical Competence / Q000706:statistics & numerical data; D004503:Education, Medical, Graduate / Q000379:methods*; D004636:Emergency Service, Hospital; D006801:Humans; D007396:Internship and Residency; D011446:Prospective Studies; D014465:Ultrasonics / Q000193:education; D014463:Ultrasonography