Abstract
CPAP (Continuous Positive Airway Pressure) for SAS patients is intended to continue to send the air of a constant pressure from the mouth and nose with a mask during sleep. Treatment in this way, and feel uncomfortable, such as stifling patients by positive pressure, it takes a long time to get used to the sleeping environment. It was considered possible to provide a comfortable sleep, than conventional breathing assistance device to SAS patients by applying the ventilator due to the pressure fluctuation is oscillatory flow instead of to conventional breathing assistance device. Experimental apparatus are composed by ventilation equipment, OSAS patient's upper airway obstruction model, and lung model with lung compliance. Half-life and pressure in the lung model were measured. As a result, in the upper airway it was a successful to be ventilated about the same half-life as released within airway. The higher frequency of the oscillatory flow, or tidal volume are applied, the shorter the ventilation time become. Lung model can be certainly ventilated by oscillatory flow, around in atmospheric pressure. Therefore, it will be more comfortable than CPAP.
