| abstract |
Method(s) and apparatus provide a controlled release of enriched gas such as the gas produced by an oxygen concentrator (100) using adaptive triggering. Release of a bolus may be responsive to a generated trigger signal. The trigger signal may be generated by an evaluation of a trigger threshold. The trigger threshold may be derived from or calculated from a pressure signal, such as an adjusted pressure signal, from a pressure sensor. The pressure sensor may be pneumatically coupled with an airway of a user such that the pressure signal may be representative of airway pressure, or changes in airway pressure, attributable to the user. The trigger signal may be generated from a comparison between the pressure signal and the trigger threshold. The trigger threshold may be derived with an activity signal, such as one computed from the pressure signal, so as to adapt trigging sensitivity. |