Published ahead of print on April 7, 2006, doi:10.1164/rccm.200505-820OC
American Journal of Respiratory and Critical Care Medicine Vol 173. pp. 1348-1355, (2006)
© 2006 American Thoracic Society
doi: 10.1164/rccm.200505-820OC
Oral Decontamination with Chlorhexidine Reduces the Incidence of Ventilator-associated Pneumonia
Mirelle Koeman,
Andre J. A. M. van der Ven,
Eelko Hak,
Hans C. A. Joore,
Karin Kaasjager,
Annemarie G. A. de Smet,
Graham Ramsay,
Tom P. J. Dormans,
Leon P. H. J. Aarts,
Ernst E. de Bel,
Willem N. M. Hustinx,
Ingeborg van der Tweel,
Andy M. Hoepelman and
Marc J. M. Bonten
Division of Medicine, Infectious Diseases, and Geriatrics, Department of Internal Medicine and Dermatology; Julius Center for Health Sciences and Primary Care; Department of Perioperative Care and Emergency Medicine; Center for Biostatistics; Eijkman Winkler Institute for Microbiology, Inflammation, and Infectious Diseases, University Medical Centre Utrecht; Department of Intensive Care Medicine, Diakonessenhuis Utrecht, Utrecht; Department of Infectious Diseases, University Medical Centre Nijmegen, Nijmegen; Department of Internal Medicine and Intensive Care Medicine, Rijnstate Hospital Arnhem, Arnhem; Hospital Board, Atrium Medical Center; Department of Intensive Care Medicine, Atrium Hospital Heerlen, Heerlen; and Department of Anesthesiology and Intensive Care Medicine, Antonius Hospital Nieuwegein, Nieuwegein, The Netherlands
Correspondence and requests for reprints should be addressed to Mirelle Koeman, M.D., University Medical Center Utrecht, Department of Emergency Medicine and Infectious Diseases (F02.126), Heidelberglaan 100, 3884CX Utrecht, The Netherlands. E-mail: groenendijk-koeman{at}wanadoo.nl
Rationale: Ventilator-associated pneumonia (VAP) is the most frequently occurring nosocomial infection associated with increased morbidity and mortality. Although oral decontamination with antibiotics reduces incidences of VAP, it is not recommended because of potential selection of antibiotic-resistant pathogens. We hypothesized that oral decontamination with either chlorhexidine (CHX, 2%) or CHX/colistin (CHX/COL, 2%/2%) would reduce and postpone development of VAP, and oral and endotracheal colonization.
Objectives: To determine the effect of oral decontamination with CHX or CHX/COL on VAP incidence and time to development of VAP.
Methods: Consecutive patients needing mechanical ventilation for 48 h or more were enrolled in a randomized, double-blind, placebo-controlled trial with three arms: CHX, CHX/COL, and placebo (PLAC). Trial medication was applied every 6 h into the buccal cavity. Oropharyngeal swabs were obtained daily and quantitatively analyzed for gram-positive and gram-negative microorganisms. Endotracheal colonization was monitored twice weekly.
Results: Of 385 patients included, 130 received PLAC, 127 CHX and 128 CHX/COL. Baseline characteristics were comparable. The daily risk of VAP was reduced in both treatment groups compared with PLAC: 65% (hazard ratio [HR] = 0.352; 95% confidence interval [CI], 0.160, 0. 791; p = 0.012) for CHX and 55% (HR = 0.454; 95% CI, 0.224, 0. 925; p = 0.030) for CHX/COL. CHX/COL provided significant reduction in oropharyngeal colonization with both gram-negative and gram-positive microorganisms, whereas CHX mostly affected gram-positive microorganisms. Endotracheal colonization was reduced for CHX/COL patients and to a lesser extent for CHX patients. No differences in duration of mechanical ventilation, intensive care unit stay, or intensive care unit survival could be demonstrated.
Conclusions: Topical oral decontamination with CHX or CHX/COL reduces the incidence of VAP.
Key Words: chlorhexidine • ventilator-associated pneumonia • prevention
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