초록 ▼

This invention relates to a respirator provided with a supply circuit and a utilization circuit, with a breathable gas accumulator, a distributor and a cyclic action control device. The respirator comprises an auxiliary make-up circuit for providing a make-up or complement of breathable gas, a disch

This invention relates to a respirator provided with a supply circuit and a utilization circuit, with a breathable gas accumulator, a distributor and a cyclic action control device. The respirator comprises an auxiliary make-up circuit for providing a make-up or complement of breathable gas, a discharge circuit for the breathable gas and a ventilation corrector device sensing the pressure in the utilization circuit and acting on said make-up circuit and discharge circuit to provide a complement or withdrawal of breathable gas. The invention is applicable for treatment of respiratory inadequacies performed in hospital or domestic environments.

대표청구항 ▼

In a respirator for the artificial ventilation of the pulmonary tracts of a user in accordance with a cycle of inhalation and exhalation stages of the kind comprising supply circuit means delivering a breathable gas, utilisation circuit means including an inhalation branch and an exhalation branch p

In a respirator for the artificial ventilation of the pulmonary tracts of a user in accordance with a cycle of inhalation and exhalation stages of the kind comprising supply circuit means delivering a breathable gas, utilisation circuit means including an inhalation branch and an exhalation branch provided with an exhalation valve, breathable gas accumulator means communicating with said supply and utilisation circuit means and forming a reserve buffer of said breathable gas, distributor means connected to said supply circuit means and comprising an inhalation valve in communication with said inhalation branch for selectively admitting said breathable gas thereto, an accumulator valve and a non-return valve both of which are disposed between the inhalation valve and said accumulator, a cyclic action control device which controls said inhalation valve, said exhalation valve, and said accumulator valve according to a predetermined programme and which is arranged to direct the breathable gas coming from the supply circuit means and from the accumulator means towards said inhalation branch during the inhalation stages, and to direct the breathable gas coming from said supply circuit means towards said accumulator during the exhalation stages; the improvement comprising, in combination with the foregoing, auxiliary makeup circuit means for supplying a complement of breathable gas to the utilisation circuit means, discharge circuit means for selectively withdrawing a part of the breathable gas in advance of said utilisation circuit, and ventilation corrector circuit means sensing changes in pressure in said inhalation branch and responsive to the durations of the inhalation and exhalation stages to alter such durations accordingly, with said ventilation corrector circuit means acting on said auxiliary makeup circuit means and said discharge circuit means to cause such means to make up or to withdraw said breathable air in dependence upon said changes in pressure and changes in said durations.