Patent ID: 8683999
Filing Date: 2014-04-01
Classification: A61B,A61M

Abstract:
1. A method for controlling bi-level delivery of pressurized air to a patient comprising the steps of: capturing a signal representing the patient's respiratory cycle, delivering pressurized air based on said respiratory cycle and a pressure-time template encompassing a first treatment pressure and a second treatment pressure, determining the extent of any leak, determining the presence of any flow flattening in the patient's respiratory cycle, determining the presence of any apnea or hypopnea, adjusting said first treatment pressure based on the extent of said leak and the presence of apnea or hypopnea; and adjusting said second treatment pressure, separately from adjusting said first treatment pressure, based on the presence of any flow flattening in the patient's respiratory cycle; wherein said method is implemented by a bi-level ventilation device comprised of a controller, blower, and flow sensor.