Plant, preferably for anaesthesia

Claim 1

Apparatus for the administration of anaesthetics comprising a closed system including a mask, inlet means, carbon dioxide absorption means, rubber bag, at least one check valve, inlet means, a branched pipe, a flowmeter, a regulating valve and a vacuum means, said inlet means provided for the introduction of anaesthetic gas from a rotameter metering means into said system and communicated to said carbon dioxide absorption means; said carbon dioxide absorption means for the absorption of carbon dioxide of the expiratory air and communicated to said branched pipe; said branched pipe communicated to said rubber bag and said vacuum means for contrOlled suction and substantially continuous, uninterrupted exhaust of at least a portion of said anaesthetic gas from said system; said vacuum means comprising a T-shaped ejector suction unit including an inlet and outlet means, a source of pressurized gas and an exhaust means communicated to said branched pipe of said system, said inlet and outlet means disposed from each other and containing therebetween a first and second truncated cone jet bodies spaced apart from each other, their narrow ends facing each other, said first cone contained in said inlet means and positioned such that the narrow end thereof extends over said exhaust means, said second cone contained in said outlet means, the distance between the narrow ends of said first and second cones being about equal to the inside diameter of said exhaust means, and said outlet means communicated from the operating room to a venting channel, wherein the pressurized gas passes between said first and second cones thereby creating suction and removing the anaesthetic gas from said exhaust means; said flowmeter and regulating valve communicated to said branched pipe and communicated and attached to said exhaust means of said vacuum means, the downstream portion of said flowmeter defining said exhaust means; said rubber bag for controlled administration of the anaesthetic gas to and communicated with said mask; said check valve provided for one-way flow between and communicated with said rubber bag and said mask; said mask for administration of the anaesthetic gas to the patient and communicated to said inlet means; an additional check valve provided for one-way flow between and communicated with said rubber bag and said inlet means; the entire system being closed such that at least a portion of the return anaesthetic gas leaving said mask is substantially continuously exhausted away from the area in which said apparatus is operated.