Patent ID: 8955513
Filing Date: 2015-02-17
Classification: A61M

Abstract:
1. An apparatus for delivering pressurized gas to an airway of a subject, the apparatus comprising: a gas flow generator adapted to provide a substantially continuous positive-pressure flow of gas to an airway of a subject; a conduit operatively coupled to the gas flow; a subject interface operatively coupled to said conduit, the subject interface being adapted to communicate said conduit with the airway of the subject; one or more sensors each having a signal adapted to detect a respiratory-related characteristic of the subject leading to a respiratory event, wherein the sensor or sensors are selected from the group comprising an airflow sensor, a pressure transducer that monitors the subject's breathing, a respiratory effort sensor consisting of a belt placed around a subject's thorax or abdomen, or an expired end carbon dioxide sensor; and a processor operatively coupled to the gas flow generator and the one or more sensors, wherein the processor determines and controls the level of flow generated by the gas flow generator in response to the respiratory event through the use of wavelet-based analysis of at least the signal received from the one or more sensors to predict or determine a likelihood of the respiratory event and the wavelet analysis applies a wavelet transform to create wavelet coefficients using either a discrete stationary wavelet transform or a wavelet packet transform.