Apparatus for controlling the flow of a variable gas mixture, apparatus for correcting the flow of a variable gas mixture through a conduit, apparatus for supplying and circulating a gas composition to a medical device, method of controlling the flow of a gas mixture of varying proportions through a conduit with a regulator located therein, method for providing a medical device with a gas composition of a desired composition comprising a first gas and a second gas in controlled variable proportions, method for extracorporeal blood treatment, use of a volumetric flow meter, method for providing a medical device with a gas composition comprising xenon and oxygen in varying proportions, and apparatus for controlling the flow rate of gas through a conduit

摘要

"Apparatus for the control of the flow of a gas mixture of proportions, Apparatus for the correction of the flow of a gas mixture of variable proportions, apparatus for the provision and movement of the control of the instrumentation FROM THE FLOW OF A GAS MIX OF VARIABLE PROPORTIONS THROUGH A CONDUCT WITH A REGULATOR ALSO LOCATED, METHOD FOR PROVISION OF A MEDICAL USE DEVICE WITH A COMPOSITION DESIRED TO BE PROVIDED VARIOUS METHOD FOR EXTRACORPORAL BLOOD TREATMENT, USE OF A VOLUMETRIC FLOW METER, METHOD FOR PROVIDING A MEDICAL USE DEVICE UNDERSTANDING XENON AND OXYGEN IN PROPORTION OF THE VARIOUS VARIOUS CONTROLS " It is a volumetric flow controller (1) for controlling the flow of a gas mixture of varying proportions through a conduit (3) including a valve means (5) to regulate the gas flow through the conduit, a means (9) for operating the valve means, a volumetric flow meter (7), such as a Pelton rotor, for measuring gas flow through the conduit, which provides a return signal (29) for comparison with a setpoint signal (17) on an amplifier (15) that generates an adjustment signal (11) that is fed to the drive means. The setpoint signal is generated by a setpoint signal generation means (19) comprising a potentiometer (21) for production as input of a value corresponding to a desired flow rate and a deceleration circuit ( 23) consisting of a resistor (27) for delaying the setpoint signal change from the previous setpoint signal to the desired setpoint signal for a period of time sufficient to compensate for the inherent response delay in the meter. volumetric flow, thus providing smooth and stable control of the gas flow. Preferably, the potentiometer is a digital potentiometer (403), the voltage of which is variable by independent manipulation of rotary encoders (417).