title: A prospective study assessing the efficacy of abdominal computed tomography scan without bowel preparation in diagnosing intestinal wall and luminal lesions in patients presenting to the emergency room with abdominal complaints.
abstract: OBJECTIVE
  To evaluate the positive predictive value of abdominal non-prepared computed tomography (CT) for diagnosing intestinal lumen or wall lesions in patients presenting to the emergency room (ER) with abdominal complaints.
  
  
  METHODS
  For 1-year we prospectively evaluated all ER patients hospitalized after abdominal CT scan detected either intraluminal or intestinal wall lesions. These patients underwent colonoscopy serving as gold standard. Patients with prior abdominal pathology or CT findings of appendicitis or diverticulitis were excluded.
  
  
  RESULTS
  Five hundred and sixty-eight abdominopelvic CT scans were performed in the ER, 96 had positive colonic findings. Sixty-two patients were excluded, 46 because of diverticulitis or appendicitis, 16 because of prior abdominal pathology. Of the remaining 34 patients, 14 did not undergo colonoscopy during hospitalization. Twenty eligible patients were included in the study. The positive predictive value of the CT scans performed in the ER was calculated to be 45% (95% CI 25-67).
  
  
  CONCLUSIONS
  CT findings correlated with colonoscopic findings only in approximately half of the cases. Relying on non-prepared CT scan findings in planning patient management and colonoscopy may lead to unnecessary diagnostic work-ups.
authors.affiliation: Gastroenterology Unit, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.
authors.forename: Michal
authors.initials: M
authors.lastname: Mizrahi
authors.forename: Yoav
authors.initials: Y
authors.lastname: Mintz
authors.forename: Avraham
authors.initials: A
authors.lastname: Rivkind
authors.forename: David
authors.initials: D
authors.lastname: Kisselgoff
authors.forename: Eugene
authors.initials: E
authors.lastname: Libson
authors.forename: Mayer
authors.initials: M
authors.lastname: Brezis
authors.forename: Eran
authors.initials: E
authors.lastname: Goldin
authors.forename: Oren
authors.initials: O
authors.lastname: Shibolet
mesh_terms: D000005:Abdomen; D015746:Abdominal Pain / Q000000981:diagnostic imaging*; D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy; D004632:Emergency Medical Services / Q000379:methods*; D005260:Female; D006801:Humans; D007410:Intestinal Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed