Patent ID: 8915249

Claim:
A breathing assistance device comprising: a gas delivery system configured to supply breathable gas comprising air received from a pressurized air source and supplemental oxygen received from a supplemental oxygen source that is separate from the pressurized air source; a patient interface configured to interface with a patient for delivering the breathable gas to one or more breathing passages of the patient; a connection system configured to communicate the breathable gas supplied by the gas delivery system to the patient interface for delivery to the patient; a control system configured to control the delivery of the breathable gas to the patient, the gas delivery system being configured to deliver the breathable gas with a first average oxygen concentration during a first portion of an inhalation phase for the patient, the gas delivery system being configured deliver the breathable gas with a second average oxygen concentration during a second portion of the inhalation phase for the patient, the second average oxygen concentration being lower than the first average oxygen concentration; and a user interface connected to the control system, the use interface configured to receive characteristics of the patient from a user, the user interface configured to transmit the characteristics of the patient to the control system, the control system delivering the breathable gas to the patient during the inhalation phase based on the characteristics of the patient.