Detecting sleep events using localized blood pressure changes
AssigneeNellcor Puritan Bennett Ireland
InventorsJames Nicholas Watson, Rakesh Sethi, Paul Stanley Addison
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Abstract
Techniques for detecting sleep events are disclosed. In some embodiments, a continuous non-invasive blood pressure (“CNIBP”) monitoring system may be used to obtain blood pressure values from a subject during a sleep study. Changes in the blood pressure over time may be determined and analyzed in order to identify a sleep event. The localized blood pressure changes may be interpreted in isolation or in combination with other signals collected from the subject.
Claims17
A method for detecting sleep events, the method comprising:
- detecting, using at least one light sensor, at least one photoplethysmograph (PPG) signal based at least in part on receiving light that passed through blood perfused tissue;
- calculating, using a continuous non-invasive blood pressure (CNIBP) monitor, blood pressure based at least in part on the at least one PPG signal;
- determining, using the CNIBP monitor, changes in the blood pressure;
- analyzing, using the CNIBP monitor, the changes in the blood pressure to identify an abrupt change in the blood pressure;
- and
- identifying, using the CNIBP monitor, a sleep event based at least in part on the identified abrupt change in the blood pressure, wherein the sleep event is selected from the group consisting of sleep arousal and steep apneic event.
A continuous non-invasive blood pressure (CNIBP) system for detecting sleep events comprising:
- a light sensor capable of detecting at least one photoplethysmograph (PPG) signal based at least in part on receiving light that passed through blood perfused tissue;
- and
- a CNIBP monitor configured to:
- calculate blood pressure based at least in part on the at least one PPG signal;
- determine changes in the blood pressure;
- analyze the changes in the blood pressure to identify an abrupt change in the blood pressure;
- and
- identify a sleep event based at least in part on the identified abrupt change in the blood pressure, wherein the sleep event is selected from the group consisting of sleep arousal and steep apneic event.
Dependencies are inferred from the claim text.