title: Adverse events of computed tomography colonography: an Italian National Survey.
abstract: OBJECTIVE
  To retrospectively study the frequency and magnitude of complications associated with computed tomography (CT) colonography in clinical practice.
  
  
  METHODS
  A questionnaire on complications of CT colonography was sent to Italian public radiology departments identified as practicing CT colonography with a reasonable level of training. The frequency of complications and possible risk factors were retrospectively determined. Responses were collated and row frequencies determined. A multivariate analysis of the factors causing adverse events was also performed.
  
  
  RESULTS
  40,121 examinations were performed in13 centers during the study period. No deaths were reported. Bowel perforations occurred in 0.02% (7 exams). All perforations were asymptomatic and occurred in patients undergoing manual insufflation. Five perforations (71%) occurred in procedures performed following a recent colonoscopy. There was no significant difference between perforations associated with rectal balloon (0.017%) and those that were not (0.02%). Complications related to vasovagal reaction (either with or without spasmolytic) occurred in 0.16% (63 exams). All vasovagal reactions resolved in less than 3h, without any sequelae.
  
  
  CONCLUSIONS
  Perforation rate at CT colonography in Italy is comparable with elsewhere in the world, occurring regardless of the experience of radiology centers. Although the risk is very small, it may not be negligible when compared with the risk of diagnostic colonoscopy.
authors: Department of Radiological Sciences, Oncology and Pathology, Sapienza University of Rome, Rome, Italy.
authors: Franco
authors: F
authors: Iafrate
authors: Gabriella
authors: G
authors: Iussich
authors: Loredana
authors: L
authors: Correale
authors: Cesare
authors: C
authors: Hassan
authors: Daniele
authors: D
authors: Regge
authors: Emanuele
authors: E
authors: Neri
authors: Paolo
authors: P
authors: Baldassari
authors: Maria
authors: M
authors: Ciolina
authors: Alessandro
authors: A
authors: Pichi
authors: Marcella
authors: M
authors: Iannitti
authors: Davide
authors: D
authors: Diacinti
authors: Andrea
authors: A
authors: Laghi
mesh_terms: D003106:Colon / Q000293:injuries*; D023881:Colonography, Computed Tomographic / Q000009:adverse effects* / Q000706:statistics & numerical data*; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging; D006306:Health Surveys; D006801:Humans; D007416:Intestinal Perforation / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000209:etiology*; D007558:Italy / Q000453:epidemiology; D011872:Radiology Department, Hospital / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D012307:Risk Factors; D012421:Rupture; D011795:Surveys and Questionnaires
keywords: CT colonography; Colon cancer; Perforation; Survey; Vasovagal syncope; Virtual colonoscopy