Apparatus for providing a breathing gas with an overpressure and process of controlling such apparatus installation
AssigneeTaema
InventorsRoger Champain, Nourredine Kissi, Daniel Zalkin
Life of this patent
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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.
Claims9
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.
Apparatus for providing to a patient's airways a determined overpressure, comprising:
- 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.
Dependencies are inferred from the claim text.