Distinguishing between central and obstructive sleep apnea
AssigneeFisher & Paykel Healthcare Limited
InventorsDavid Robin WHITING, Amol Man MALLA, Simei Gomes WYSOSKI
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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 treatment apparatus comprising:
- a blower;
- a sensor for measuring respiratory airflow;
- and
- a control system operating software that causes the control system to:
- control the blower,
- receive an output of the sensor,
- detect a presence of an apnea event based on the sensor output,
- measure one or more characteristics of at least one breath following the apnea event, and
- classify the apnea event as central sleep apnea or obstructive sleep apnea based on at least one of the characteristics.
A method performed by a controller of a respiratory treatment apparatus, the method comprising:
- controlling a blower of the respiratory treatment apparatus,
- receiving, at the controller, an output of a sensor of the respiratory treatment apparatus,
- detecting, but the controller, a presence of an apnea event based on the sensor output,
- measuring one or more characteristics of at least one breath following the apnea event, and
- classifying, by the controller, the apnea event as central sleep apnea or obstructive sleep apnea based on at least one of the characteristics.
Dependencies are inferred from the claim text.