DETECTING MOUTH-BREATHING IN EARLY PHASE EXPIRATION

摘要

Mouth-breathing can be detected in early phase expiration during respiratory treatments involving a pressure support device. In accordance with some embodiments, an output signal is received from a sensor that conveys information relating to one or more parameters of the pressurized flow of breathable gas as it is delivered to an air-way of a subject. Transitions are estimated between inspiratory phases and expiratory phases of respiration by the subject based on the one or more determined parameters. A local extreme is identified in a level of a first parameter during a given expiratory phase of respiration by the subject. The level of the first parameter is analyzed as a function of time within a sampling window to determine whether the subject is breathing by mouth during the given expiratory phase. The sampling window begins at or proximate to the identified local extreme in the level of the first parameter.

主权项

1. A system configured for detecting mouth-breathing in early phase expiration during respiratory treatments involving a pressure support device, the system comprising:
a pressure generator configured to generate a pressurized flow of breathable gas for delivery to the airway of a subject; a sensor configured to provide an output signal conveying information relating to one or more parameters of the pressurized flow of breathable gas as it is delivered to the airway of the subject; and one or more processors configured to execute computer program modules, the computer program modules comprising:
a parameter module configured to determine one or more parameters of the pressurized flow of breathable gas as it is delivered to the airway of the subject based on the output signal, the one or more parameters comprising a first parameter;a breath delineation module configured to estimate transitions between inspiratory phases and expiratory phases of respiration by the subject based on the one or more parameters determined by the parameter module;a parameter extrema module configured to identify a local extreme in a level of the first parameter during a given expiratory phase of respiration by the subject; anda mouth-breathing detection module configured to determine whether the subject is breathing by mouth during the given expiratory phase by analyzing the shape of the level of the first parameter as a function of time within a sampling window, the sampling window beginning at or proximate to the identified local extreme in the level of the first parameter.