Patent ID: 8616208

Claim:
A method applied in an oral appliance, for automatic controlling negative pressure supplied to a user's oral cavity, the oral appliance comprising: a sensing unit, a physiological status extraction unit, a negative pressure source, an oral interface, and a negative pressure control unit, and the method comprising: sensing a physiological signal from a user and outputting the physiological signal by the sensing unit; providing a negative pressure to an oral interface interfacing with the user's oral cavity by the negative pressure source; and extracting a physiological status based on the physiological signal by the physiological status extraction unit; automatically controlling the negative pressure provided to the user's oral cavity based on the physiological status by the negative pressure control unit; wherein the method further comprising: determining a breath phase of the user in exhalation or in inhalation, and automatically turning on or increasing the negative pressure in inhalation phase, and automatically maintaining or turning off or decreasing the negative pressure in exhalation phase.