Patent ID: 6032665
Filing Date: 2000-03-07
Classification: A61M,F16K

Abstract:
A dosing device comprising:a connection adapted to place said dosing device in communication with an inspiratory line of a breathing assist device in proximity to a subject;a constant-volume dosing chamber having a volume less than or equal to a volume of a dosage to be added to the breathing gas during one inspiratory phase;a source of additive fluid;an inlet to said dosing chamber and a first valve disposed in said inlet, said inlet connected to said source of additive fluid at a predetermined, constant, positive pressure;an outlet from said dosing chamber and communicating with said connection for conveying a dosage consisting exclusively of said additive fluid from said dosing chamber to said connection, and a second valve disposed in said outlet;operating means for opening and closing each of said first end second valves; andcontrol means for controlling said operating means for opening at least said second valve for at least one interval during said inspiratory phase.