[A simple apparatus for comparisons of low-pressure coff function in vitro (author's transl)]

A simple apparatus comprising basically a glass tube closed on one side, two low-pressure manometers with a range of 150 millibars, a pump with a small reservoir of compressed air as well as the necessary connections and valves allows in vitro comparisons of pressures in low-pressure cuffs whereby the introcuff-pressure can be adjusted to any value between zero and 150 milibars. One can also monitor continually the interdependence between the intracuff-pressure and the airway pressure whereby the latter can also be varied continuously.