title: Association between transfusion of stored blood and bacterial infective complications after biliary operations.
abstract: OBJECTIVE
  To examine the association between blood transfusion and infective complications after biliary operations.
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  District hospital.
  
  
  METHODS
  875 consecutive patients who required biliary operations.
  
  
  METHODS
  Postoperative infective morbidity in hospital.
  
  
  RESULTS
  73 patients (8%) developed postoperative infections in hospital. Univariate analysis showed that the development of infections was significantly associated with blood transfusion (p < 0.001), stones in the common bile duct (p < 0.001), operations on the common bile duct (p < 0.001), T-tube drainage (p < 0.001), duration of operation (p = 0.008), and age (p = 0.03). Multivariate logistic regression analysis showed that only blood transfusion and stones in the common bile duct were independent predictors of infection. The corrected odds ratios for infection were 4.7 (95% confidence interval (CI) 2.4 to 9.3) when 1-3 units of blood were given and 5.6 (95% CI 2.3 to 13.6) when more than three units were given.
  
  
  CONCLUSIONS
  Transfusion is an independent risk factor in the development of postoperative infection in hospital in patients who have had biliary operations.
authors.affiliation: Department of Surgery, Innherred Hospital, Levanger, Norway.
authors.forename: T H
authors.initials: TH
authors.lastname: Edna
authors.forename: T
authors.initials: T
authors.lastname: Bjerkeset
authors.forename: M
authors.initials: M
authors.lastname: Svinsås
authors.forename: J O
authors.initials: JO
authors.lastname: Drogset
authors.forename: K
authors.initials: K
authors.lastname: Skreden
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001424:Bacterial Infections / Q000209:etiology*; D001660:Biliary Tract Diseases / Q000601:surgery*; D001793:Blood Preservation; D001803:Blood Transfusion; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012189:Retrospective Studies