title: Abdominal CT scanning for trauma: how low can we go?
abstract: OBJECTIVE
  computed tomography (CT) of the abdomen is an established, albeit expensive and perhaps overused, diagnostic modality for the evaluation of the injured patient. We developed a practice management guideline for blunt abdominal trauma intended to reduce the percentage of negative CT scans, yet minimize delayed recognition of injury and non-therapeutic laparotomy.
  
  
  METHODS
  between April 1996 and March 1997, 1147 adult patients at risk for blunt abdominal injury were admitted to our Level I trauma centre and underwent abdominal evaluation according to the practice management guideline.
  
  
  RESULTS
  abdominal CT was performed in 522 patients (45%), and 441 scans were negative (85%). Delayed recognition of injury and non-therapeutic laparotomy rates were low, 4% and 1.6%, respectively.
  
  
  CONCLUSIONS
  abdominal CT scanning in trauma patients can achieve low non-therapeutic laparotomy and delayed recognition of injury rates but at the expense of high negative CT scan rates. Greater reliance on the physical examination and perhaps abdominal ultrasound may reduce negative CT scan rates and yet preserve low non-therapeutic laparotomy and delayed recognition of injury rates.
authors.affiliation: Department of Surgery and Emergency Medicine, Carolinas Medical Center, P.O. Box 32861, Charlotte, NC 28232-2861, USA. djacobs@carolinas.org
authors.forename: D G
authors.initials: DG
authors.lastname: Jacobs
authors.forename: J L
authors.initials: JL
authors.lastname: Sarafin
authors.forename: J A
authors.initials: JA
authors.lastname: Marx
mesh_terms: D000007:Abdominal Injuries / Q000000981:diagnostic imaging*; D000328:Adult; D000465:Algorithms; D006801:Humans; D017410:Practice Guidelines as Topic; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000706:statistics & numerical data; D019564:Unnecessary Procedures; D014949:Wounds, Nonpenetrating / Q000000981:diagnostic imaging*