PRESSURE RANGE ADJUSTMENT FOR RESPIRATORY THERAPY DEVICE

A respiratory therapy system comprising:a flow generator adapted to provide pressurized gases to a patient,a sensor adapted to measure at least one characteristic capable of being used to determine one or more traits of a sleep-disordered breathing event (SDBE) of the patient, anda hardware controller configured to:in a first therapy mode, control the flow generator to deliver pressurized gases at a first pressure level for a first time period and to deliver pressurized gases at a second pressure level for a second time period;determine for each of the first time period and the second time period a sleep index based on one or more traits of the SDBE of the patient by analyzing the at least one characteristic; anddetermine a pressure window of a second therapy mode, the pressure window comprising a minimum pressure limit and a maximum pressure limit, wherein the hardware controller is configured to determine the pressure window by using a continuous function that associates a sleep index with a pressure level; anddefine the minimum pressure limit and/or the maximum pressure limit of the pressure window based the determined sleep indices,the minimum pressure limit being less than the maximum pressure limit.