• G D T Inglis, L A Jardine, and M W Davies.
• Royal Brisbane and Women's Hospital, Grantley Stable Neonatal Unit, Butterfield Street, Herston, Brisbane, Queensland, Australia, 4029. Garry_Inglis@health.qld.gov.au
• Cochrane Db Syst Rev. 2007 Oct 17 (4): CD004697.

BackgroundUmbilical artery catheters are often used in unwell neonates. Infection related to the use of these catheters may cause significant morbidity and mortality. The use of prophylactic antibiotics has been advocated for all newborns with umbilical artery catheters in order to reduce the risk of colonisation and acquired infection. Countering this is the possibility that harm, such as the emergence of antibiotic resistant organisms, may outweigh benefit.ObjectivesThe primary objective was to assess whether prophylactic antibiotics reduce mortality and morbidity in neonates with umbilical artery catheters. Two different policies regarding the prophylactic use of antibiotics in neonates with umbilical artery catheters were reviewed: 1) a policy of prophylactic antibiotics for the duration of catheterisation (or other fixed duration of antibiotic treatment) versus placebo or no treatment among neonates with umbilical artery catheters; 2) a policy of continuing versus discontinuing prophylactic antibiotics among neonates with umbilical artery catheters who had been started on antibiotics at the time of catheterisation but whose initial cultures to rule out sepsis are negative.Search StrategyMEDLINE (January 1950 to May 2007), CINAHL (1982 to May 2007), the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 2, 2007), the Cochrane Neonatal Group Specialised Register and reference lists of articles were searched.Selection CriteriaRandomised and some non-randomised (i.e., quasi-randomised trials) controlled trials of adequate quality in which newborn infants with umbilical artery catheters are randomised to receive prophylactic antibiotics versus placebo or no treatment.Data Collection And AnalysisTwo reviewer authors independently assessed trial quality.Main ResultsTwo quasi-randomised trials have been included. However, given their poor quality, we have not pooled the results. There were no statistically significant differences in important outcomes in either study.Authors' ConclusionsThere is insufficient evidence from randomised trials to support or refute the use of prophylactic antibiotics when umbilical artery catheters are inserted in newborn infants, and no evidence to support or refute continuing antibiotics once initial cultures rule out infection in newborn infants with umbilical artery catheters.

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