초록 ▼

An apparatus for the regulation of a gas volume delivered to a patient during a respiratory cycle. The apparatus includes at least one valve (9 or 8) for discharging some of the propellant gas flowing from a propellant gas source (4) into a propellant gas chamber (18), the propellant gas chamber (18

An apparatus for the regulation of a gas volume delivered to a patient during a respiratory cycle. The apparatus includes at least one valve (9 or 8) for discharging some of the propellant gas flowing from a propellant gas source (4) into a propellant gas chamber (18), the propellant gas chamber (18) being at least partially defined by a wall (17), having a second chamber (19) on the other side thereof. The location of said wall changes as the propellant gas pressure increases in the propellant gas chamber, thus increasing the volume of the propellant gas chamber, the volume of second chamber (19) on the other side of wall (17) diminishing, thus forcing the gas being delivered to a patient to flow towards a patient (21). Thereafter, in order to perform the exhalation of a patient, the propellant gas chamber pressure is allowed to discharge through a valve (9 or 8), whereby the volume of propellant gas chamber (18) diminishes and the volume of second chamber (19) increases as a result of the displacement of the wall (17). Between the propellant gas chamber (18) and propellant gas source (4) is a pressure regulating element (6), capable of regulating the pressure of the propellant gas flowing from the propellant gas source. A method for the regulation of a propellant gas flow to be delivered into a propellant gas chamber (18) and supplied from a propellant gas source (4) by pressure regulation of the propellant gas.

대표청구항 ▼

Apparatus for regulating the volume of a breathing gas delivered to a patient during an inhalation phase of a respiratory cycle, said respiratory cycle also having an expiration phase, said apparatus employing propellant gas from a propellant gas source and comprising: a propellant gas chamber; supp

Apparatus for regulating the volume of a breathing gas delivered to a patient during an inhalation phase of a respiratory cycle, said respiratory cycle also having an expiration phase, said apparatus employing propellant gas from a propellant gas source and comprising: a propellant gas chamber; supply conduit means extending from the propellant gas source to said propellant gas chamber for providing a flow of propellant gas from the gas source to said propellant gas chamber; discharge conduit means for discharging propellant gas from said propellant gas chamber; a second gas chamber containing breathing gas and separated by a wall from said propellant gas chamber, said wall being movable responsive to the pressure of the propellant gas in said propellant gas chamber for altering the volume of said second gas chamber, said second gas chamber delivering breathing gas to the patient in the inhalation phase and receiving gas expired by the patient in the expiration phase as a result of the supply and discharge of propellant gas to and from the propellant gas chamber; a controllable pressure regulator interposed in said supply conduit means and having an input connected to the propellant gas source and an output coupled to said propellant gas chamber for discharging gas at a pressure determined by the pressure regulating action of said controllable pressure regulator; means interposed in said supply conduit means, said means sensing and responding to the flow of propellant gas through said supply conduit means for measuring a selected physical property of the flowing propellant gas indicative of the amount of gas delivered to said propellant gas chamber; and control means coupled to said controllable pressure regulator and said measuring means for operating said controllable pressure regulator responsive to the measurement of said selected physical property to regulate propellant gas pressure to establish a desired propellant gas flow magnitude to the propellant gas chamber during the inhalation phase.