Patent ID: 7066175
Filing Date: 2006-06-27
Classification: A61M

Abstract:
1. In a pneumatically controlled continuous positive airway pressure apparatus for supplying breathable gas from a pressurized source to an individual's breathing appliance, which appliance has an inlet for receiving the gas and an inhalation/exhalation valve for routing the gas to the individual's lungs and the exhaled air to the atmosphere, the apparatus comprising: a demand valve assembly having a supply inlet port adapted to be fluidly connected to the pressurized source, an outlet port adapted to be fluidly connected to the appliance's inlet, a reference chamber and a control assembly responsive to a pressure differential between a reference chamber pressure and an outlet port pressure for fluidly connecting and disconnecting the inlet port to and from the outlet port; and at least one adjustable back pressure regulator fluidly connected to the pressurized source and the reference chamber for setting the pressure in the reference chamber at a selected level above atmospheric pressure, wherein wherein