DE2435855A1 - METHOD AND EQUIPMENT FOR SUPPLYING GAS, IN PARTICULAR FOR LUNG RESPIRATORY DGL. EQUIPMENT - Google Patents

Description

PATENT LAWYERS

DIPL.-IN6.DR.IUR. DIPU-ING.

VOLKER BUSSE DIETRICH BUSSE

45 OSNABRÜCK ,? A. July 197 * 1

MDSERSTRASSE 2Ο / 24 L / Th

H.G. EAST & COMPANY LIMITED

Sandy Lane West, Littlemore, Oxford, England

Method and device for supplying gas, in particular for lung ventilation and similar devices

The invention relates to a method for supplying gas in a gas supply device, in particular for lung ventilation and the like. Devices, with a control valve with an inlet and outlet line connected to it, and aims a improved control of the gas supply.

According to the invention, this is achieved in a method of the specified type in that a gas-actuated flow medium logic element used to control the valve and the gas from the logic gate with an over the atmospheric Pressure lying pressure is passed into the inlet line.

The invention also relates to a device for exercising the. Process suitable gas supply device, which according to the invention is characterized by an inlet conduit 'which is connected by a valve to an outlet conduit, a the

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Valve-controlling flow medium logic element, a ^{supply line to 1} supply of gas under high pressure to the logic element and a manifold which is connected to the inlet line and which receives the gas from the logic element with a pressure above atmospheric pressure.

Further features and advantages of the invention emerge from the claims and the following description of an exemplary embodiment of the subject matter of the invention in conjunction with FIG Drawing, in the sole figure of which a lung ventilator using a logical flow medium control system is illustrated schematically.

The lung ventilator has a feed device 10 Supply of breathing gas to a patient and a gas-operated logic device or element as the flow medium logic device Timer 11 for controlling the operation of the breathing gas supply device 10.

The breathing gas supply device 10 has an inlet line 13 for supplying breathing gas through a measuring or metering device 14 to a valve 15, from which an outlet line 16 to a conventional breathing mask for a patient leads. A return line 17 from the patient's breathing mask promotes the exhaled Gases from the patient through the valve 15 and out of the supply device 10 through a discharge line 18.

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The valve 15 thus connects the patient either to the inlet line 13 or to the discharge line 18.

The actuation of the valve 15 at the corresponding points in The patient's breathing cycle is performed by the fluid logic timer 11, which as such is a commercially available facility. The control medium for the timer or switch 11 is the high pressure breathing gas supplied to the timer 11 through an inlet line 20. Instead of the gas from the timer 11 to the environment, as is normally the case with flow medium logic devices, this is Gas at a pressure higher than atmospheric pressure is collected and passed through a line 21 to the inlet line 13 of the supply device 10 supplied.

The pressure in the line 21 is of course important, since it must be sufficient to ensure the flow of gas into the line 13 while not interfering with the operation of the timer 11, i. H. the pressure in line 21 is between the pressure of the breathing gas in line 13 and the pressure in line 20.

In this way, use is made of the fact that breathing gas is available at high pressure, while on the other hand it is ensured that no gas losses occur. The gases fed to the line 13 and the line 20 can come from the same source, the pressure for the line 13 being customary

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Pressure reducing devices can be adjusted accordingly.

Although the embodiment described relates to a lung ventilator, the invention is applicable to any Applicable fluid supply devices, which are accessible to a control by flow medium logic elements or organs.

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Claims (1)

Patent claims: Method for supplying gas in a gas supply device, in particular for lung ventilation and similar devices a control valve with an inlet and outlet line connected to it, characterized in that a gas-operated flow medium logic element used to control the valve and the gas from the logic element ^ with one above the atmospheric Pressure lying pressure is passed into the inlet line. 2. Gas supply device, especially for lung ventilation. The like. Apparatus for carrying out the method according to claim 1, characterized by an inlet line (13) which is connected to an outlet line (16) by a valve (15), a flow medium logic element (11) controlling the valve (15), a supply line (20) for supplying gas under high pressure to the logic element and a manifold line (21) which receives the gas from the logic element at a pressure above atmospheric pressure and which is connected to the inlet line. 3. Device according to claim 2, characterized in that the flow medium logic element (11) is formed by a timer. M. Device according to claim 2 or 3 »characterized by, a further inlet line (17) and a discharge line (18), the 409886/1094 -G- are interconnected by the valve (15), the valve being operable in such a way that either the inlet conduit (13) and the outlet line (16) or the further inlet line (17) and the discharge line (18) are connected to one another. 5. Device according to one of claims 2 to H, characterized in that the gas flow in the inlet line (13) can be regulated by means of a metering device (14). 6. Device according to one of claims 2 to 5, characterized in that a common high pressure gas source for the Supply line (20) and the inlet line (13) are provided and the latter is assigned a pressure reducing device. 409886/1094