Fisher & Paykel Healthcare Limited

Amol Man Malla

David Robin Whiting

Simei Gomes Wysoski

Apparatuses and methods for detecting sleep apnea and classifying the events as obstructive sleep apnea (OSA) and/or central sleep apnea (CSA) are disclosed herein. The apparatuses can include respiratory treatment devices that have an auto adjusting algorithm that is able to classify a sleep apnea as CSA or OSA so that an appropriate pressure can be applied to the patient depending on the type of sleep apnea detected. The apparatuses and methods can use characteristics of at least one breath preceding the apnea event in classifying the event.

Distinguishing between central and obstructive sleep apnea

A respiratory event determination system can have a controller that determines the presence of a respiratory event. The respiratory event can be a mouth puff event. The controller determines the presence as a function of a sub-window of an expiratory window of the breath. The expiratory window extends between a first time tand a second time t. The sub-window is limited to a portion of the expiratory window. The sub-window can extend between a third time tand a fourth time t. The fourth time tcan be before the second time t.

Gas therapy system

A respiratory event determination system can have a controller that determines the presence of a respiratory event. The respiratory event can be a mouth puff event. The controller determines the presence as a function of a sub-window of an expiratory window of the breath. The expiratory window extends between a first time ti and a second time t. The sub-window is limited to a portion of the expiratory window. The sub-window can extend between a third time tand a fourth time I. The fourth time U can be before the second time t

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Amol Man Malla