Apparatus for providing a breathing gas with an overpressure and process of controlling such apparatus installation
First Claim
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1. A process of monitoring a respiratory apparatus including an electrically driven low inertia turbine exhibiting operating modes to supply gas to a patient'"'"'s airways at a determined overpressure in response to a presettable control signal applied thereto, comprising the steps of driving the turbine with a drive current supplied thereto;
- detecting variations in the drive current supplied to the turbine, thereby to detect variations in the operating mode of the turbine; and
correspondingly modifying the control signal in response to said detected variations to modulate the overpressure supplied by the turbine.
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Abstract
The turbine which generates overpressure for a breathing gas is controlled by detecting recurring variations in the operation of the turbine and correspondingly modifying the control signal which is set to a level which determines the overpressure of the turbine, thereby modulating the overpressure supplied by the turbine.
102 Citations
9 Claims
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1. A process of monitoring a respiratory apparatus including an electrically driven low inertia turbine exhibiting operating modes to supply gas to a patient'"'"'s airways at a determined overpressure in response to a presettable control signal applied thereto, comprising the steps of driving the turbine with a drive current supplied thereto;
- detecting variations in the drive current supplied to the turbine, thereby to detect variations in the operating mode of the turbine; and
correspondingly modifying the control signal in response to said detected variations to modulate the overpressure supplied by the turbine. - View Dependent Claims (2, 3, 4, 5, 6)
- detecting variations in the drive current supplied to the turbine, thereby to detect variations in the operating mode of the turbine; and
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7. Apparatus for providing to a patient'"'"'s airways a determined overpressure, comprising:
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a low inertia turbine having an outlet connectable to the patient'"'"'s airways for supplying gas thereto; an electric motor exhibiting operating modes for driving the turbine; at least one electrical power supply for supplying driving current to the motor; a source of a pressure level setting signal; control means connected to the motor for monitoring the driving current supplied thereto and thereby monitoring the overpressure supplied by the turbine in response to said pressure level setting signal; detecting means for detecting variations in the driving current monitored by said control means and thereby detecting variations in the operating mode of the motor and for generating a variation signal; and means responsive to the variation signal to modify the pressure level setting signal. - View Dependent Claims (8, 9)
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Specification