How useful are microbial filters in respiratory apparatus ?
Following an outbreak of hepatitis C in surgical patients in Australia, it has been suggested that transmission can take place as a result of contaminated anaesthetic circuits.
It has therefore been recommended that filters should be placed between patients and breathing systems with a new filter being used for each patient.
Although nosocomial pneumonia is a major manifestation of hospital-acquired infection, it is unclear whether contamination of ventilator circuits is implicated in the aetiology of this condition.
Some data suggest that bacteria cannot survive well in anaesthetic circuits and several studies have failed to demonstrate significant contamination of circuits in clinical situation.
Several outbreaks of pneumonia related to contaminated anaesthetic equipment have been described, but many of these were controlled by appropriate decontamination of the respiratory equipment.
Although ventilator filters are used by the majority of intensive care units and filters do have the ability to filter bacteria and viruses, there are few data suggesting that the use of filters reduce the rate of pulmonary infections in long-term ventilated patients.
Furthermore, to change filters between operations would have significant financial implications, and there is no conclusive evidence that they would reduce cross infection. (...)
Mots-clés Pascal : Ventilation artificielle, Contamination biologique, Bactérie, Circuit anesthésie, Prévention, Filtre bactériologique, Méthode, Pneumonie, Infection nosocomiale, Risque, Coût, Homme, Hôpital, Hygiène, Economie santé, Appareil respiratoire pathologie, Poumon pathologie
Mots-clés Pascal anglais : Artificial ventilation, Biological contamination, Bacteria, Anesthetic circuit, Prevention, Bacteriological filter, Method, Pneumonia, Nosocomial infection, Risk, Costs, Human, Hospital, Hygiene, Health economy, Respiratory disease, Lung disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0079229
Code Inist : 002B27A01. Création : 14/05/1998.