Bacterial contamination of anesthesia machines ’ internal breathing-circuit-systems

Verena Spertini, Livia Borsoi, Jutta Berger, Alexander Blacky, Magda Dieb-Elschahawi & Ojan Assadian
Background: Bacterial contamination of anesthesia breathing machines and their potential hazard for pulmonary infection and cross-infection among anesthetized patients has been an infection control issue since the 1950s. Disposable equipment and bacterial filters have been introduced to minimize this risk. However, the machines’ internal breathing-circuit-system has been considered to be free of micro-organisms without providing adequate data supporting this view. The aim of the study was to investigate if any micro-organisms can be yielded from...