Resmed Limited

Nicola Frances Wickham

Alexander Virr

Ian Malcolm Smith

Muditha Pradeep Dantanarayana

Michael Berthon-Jones

Stanley Clark

A sub-housing received within a housing of an apparatus for supplying breathable gas, includes a gas flow path between a gas inlet and a gas outlet and an impeller in fluid communication between the gas inlet and the gas outlet. The impeller is structured and configured to be releasably engaged with a shaft associated with an electric motor that is disposed exterior to the housing, whereby rotation of the shaft causes rotation of the impeller.

Apparatus for supplying breathable gas

Methods and apparatus for detecting the occurrence of a potential or actual overpressure during assisted ventilation are described. A blower () supplies pressurized gas to a conduit (), and in turn to a patient mask () for connection with the entrance of a patient's airways. A pressure sensor () detects the delivered pressure in the mask (), which is provided to a controller (). The controller () has operation over the blower () by way of a servo () and motor (). The controller () determines a relatively longterm average of the pressure signal, and compares it against a threshold value (). If the threshold value is approached or exceeded, the controller () controls the blower () and thus the supplied pressure to the patient. The effect of the control can be to limit or reduce the supplied gas pressure. The relatively longterm average can be of the order of minutes, or taken over ten or more breaths.

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Five Dock, Australia

Nicola Frances Wickham