Kontrollierte, prospektive Untersuchung zur bakteriellen Kontamination von Schlauchsystemen von Narkosegeräten bei Ausdehnung des Wechselintervallsauf 48 Stunden
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Philipps-Universität Marburg
Abstract
Introduction: Daily change of breathing circuits in the
operating theatre requires a lot of resources and is time
and labour consuming. The extended use of breathing
circuits could reduce the workload of the staff and health
care costs. The aim of the present study was to evaluate the
contamination rate of anaesthesia breathing circuits changed
after 24, 48 or 72h of use.
Materials: The study was performed as an experimental
observational study. Microbiological samples were taken
from 112 breathing systems including both parts of the
ventilator circuit (inspiration and expiration) and analysed
using microbiological standard techniques. Breathing circuits
were changed according to three different schedules.
In the 24-h group, breathing circuits were changed every
day, whereas in the 48-h group changing of the circuits
took place on Mondays, Wednesdays and Fridays. A
period of 72 h operating use was tested on weekends.
Results: A total of 112 breathing systems comprised of 224
samples from the ventilator circuit were tested for bacteria
and yeast contamination. A non-significant increase in the
contamination rate was observed with the extended use for
breathing circuits (24 h: 3.33%, 48 h: 4.35% and 72 h: 5.56%;
P for trend50.66). Similarly, no significant increase in
contamination rate could be observed with the extended
use of filters (24 h: 1.67%, 48 h: 3.26% and 72 h: 2.78%; P for
trend50.71).
Conclusion: The extended use of breathing circuits for 48
and 72 h does not increase significantly the risk of contamination,
provided that HME filters are changed separately
for every patient.
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This item has been published with the following license: In Copyright