[Characterization of different IPP-ventilation systems by measuring technics].

To characterize the essential values of function and capacity for the comparison of different ventilation systems, a system of measurements is described which uses the following values: initial gas pressure and proportion of oxygen; jet tubes: flow area and jet pressure at a distance of 10 and 20 or 25 mm; ventilation volume and pressure, and oxygen content in a half-open lung model. Description of results with 8 ventilation systems which are applied in the practice of different institutions.