Patent ID: 8991392
Filing Date: 2015-03-31
Classification: A61B,A61M

Abstract:
1. An apparatus comprising: a gases flow source configured to supply gases to a patient in use; a sensor configured to sense pressure or flow or both, supplied by the flow source or supplied to the patient; and a controller configured to receive output from the sensor, determine apneas, non-flow limited hypopneas, and flow limited breaths based on the output from the sensor, and control an output pressure of the flow source according to a pressure adjusting algorithm wherein: the controller is configured to respond to a series of apneas by increasing the output pressure by a predetermined amount in response to each non-isolated apnea preceded by another apnea within a defined time period subject to a maximum system pressure; the controller is configured to enter a pause state when a total number of non-isolated apneas less nominal periods of normal breathing exceeds a threshold, wherein the pause state has a predefined duration; and during the pause state, the controller does not increase the output pressure in response to apneas.