A - Human Necessities – 61 – H
Patent
A - Human Necessities
61
H
342/38
A61H 31/00 (2006.01) A61M 16/00 (2006.01) A61M 16/12 (2006.01) A61M 16/20 (2006.01)
Patent
CA 1158344
ABSTRACT The invention is concerned with a control device for an artificial respirator, which comprises a solenoid- controlled valve for air and a solenoid-controlled valve for oxygen, both valves being of the variable flow type as a function of the plunger travel, and discharging into a manifold, a timebase circuit for fixing both the respiratory frequency and the ratio I/E of the inhalation time to the exhalation time during each period; a mixer for fixing both the overall respiratory flow and the proportion of oxygen in the gas supplied by a regulator; and two signal gene- rators each linked to and controlling the opening of an associated solenoid-controlled valve. The timebase circuit out- put is connected to inputs of the generators in order that they may control the opening of the valves during the inhalation time, the generators being further connected to respective outputs of the mixer for receiving signals corresponding to the extent of opening of the valves during the inhalation period. The mixer is connected to the timebase circuit for receiving a signal therefrom corresponding to the ratio I/E to correspondingly adjust signals proportional to res- piratory flow and oxygen proportion. The valves are opened to an extent such that during the inhalation period, each valve allows a quantity of gas to pass which corresponds to the mean flow rate during the period.
367759
Swabey Ogilvy Renault
Synthelabo
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