[A simple self prepared IMV system using original parts of Bird including alternative ventilation under CPAP and PEEP (author's transl)].

A simple self prepared IMV system (intermittant mandatory ventilation system) is described. Only original parts of Bird are used. The system is in fact a combination of the original Bird-PEEP-system with the CPAP-system described by us [1]. The function, mounting and working of the IMV system is described. With this combined system it is now possible to apply different forms of assisted or nonassisted ventilation (CPAP, PEEP, IMV) utilizing the same system making by minor modifications. The FIO2 can be exactly regulated. It is possible to pass continuously from totally controlled ventilation to full spontaneous breathing with or without CPAP. Since original parts of Bird-gears are used in many intensive care units, new developments in artificial ventilation such as IMV can be realized without great expenses. The functioning of this system is demonstrated by several cases including the documentation of recorded changes of arterial oxigenation.