Distinguishing between central and obstructive sleep apnea
AssigneeFisher & Paykel Healthcare Limited
InventorsDavid Robin Whiting, Amol Man Malla, Simei Gomes Wysoski
Life of this patent
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Abstract
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.
Claims20
A respiratory apparatus comprising:
- a pressure or flow sensor for detecting a sensed breath, and
- a control system configured to:
- analyze one or more apnea features to make a determination whether a detected apnea event is obstructive sleep apnea or central sleep apnea,
- wherein the one or more apnea features is derived from the sensed breath by calculating one or more statistical metrics of one or more breath features within one or more predefined breath-windows, each comprising a number of breaths preceding the detected apnea event.
A method of determining if an apnea is an obstructive sleep apnea or a central sleep apnea, the method comprising:
- detecting a sensed breath using a pressure or flow sensor,
- deriving one or more apnea features from the sensed breath by calculating one or more statistical metrics of one or more breath features within one or more predefined breath-windows, each comprising a number of breaths preceding the detected apnea event, and
- analyzing the one or more apnea features to make a determination whether a detected apnea event is obstructive sleep apnea or central sleep apnea.
Dependencies are inferred from the claim text.