[The Kontron ABT 4000 respirator. Description, working mechanism and evaluation]

The ABT 4000 ventilator is aimed at being used in operating theatres, as it can be used in an open or a closed circuit, as well as for short periods of artificial ventilation with room air with or without added oxygen. This paper gives a description of the apparatus easy to understand, as well as an analysis of the workings of this constant volume ventilator controlled by microprocessor.