SYSTEM AND PROCESS FOR SUPPLYING RESPIRATORY GAS UNDER PRESSURE OR VOLUMETRICALLY
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Abstract
The object of the invention is a device for supplying respiratory gas to a patient according to respiratory cycles, comprising a gaseous flow rate generator provided with a turbine with low inertia and high nominal speed, a first circuit called a supply circuit for the gaseous flow toward a respiratory mask or an intubation means of the patient, means for measuring pressure and/or measuring flow rate of the gaseous flow, computation means for parameters of pressure and/or flow rate, and means for controlling the speed of rotation of the generator, characterized in that the measuring means, the computation means and the speed control means coact automatically to control the speed of rotation of the turbine as a function of the inspiration and expiration phases and as a function of patient pressure signals and/or inspiration flow rate signals.
250 Citations
39 Claims
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1-21. -21. (canceled)
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22. A system for providing breathing assistance to a user, the system comprising:
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a housing; an exhalation valve interface coupled to or defined in the housing; an exhalation flow inlet coupled to or defined in the housing and defining a portion of an exhalation flow path; and a pressure sensor inside or coupled to the housing in pressure communication with the exhalation valve interface capable of generating a pressure signal; wherein the exhalation valve interface and the pressure sensor are located along an exhalation valve control path separate from the exhalation flow path. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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23-1. A system according to claim 22, further comprising:
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a blower inside or coupled to the housing; a user inspiration flow outlet coupled to or defined in the housing and in flow communication with the blower; and a blower speed controller configured to control a speed of the blower.
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31. A system for providing breathing assistance to a user, the system comprising:
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a housing; an exhalation valve control system defining an exhalation valve control path for controlling an exhalation valve external to the housing, the exhalation valve control system including a pressure sensor located along the exhalation valve control path; and an exhalation flow conduit coupled to or defined in the housing and defining a portion of an exhalation flow path for communicating exhaled gas from the user; wherein the exhalation valve control path is separate from the exhalation flow path. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A method for providing breathing assistance to a user, the method comprising:
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measuring an exhalation flow in an exhalation flow path; controlling a flow generator based at least on the measured exhalation flow; measuring an exhalation valve control pressure in an exhalation valve control path; and controlling an exhalation valve based at least on the measured exhalation valve control pressure; wherein the exhalation flow path is separate from the exhalation valve control path.
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39. A system for providing breathing assistance to a user, the system comprising:
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a gas supply system housing; a patient circuit coupled between the gas supply system and the user; an exhalation valve control system, including; a exhalation valve control conduit; a first valve coupled to the patient circuit and remote from the gas supply system; and a second valve within or coupled to the gas supply system housing, the second valve configured to control the first valve by controlling a pressure in the exhalation valve control conduit; and an exhalation flow path for communicating exhaled gas from the user, the exhalation flow path separate from the exhalation valve control conduit.
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Specification