Discrimination of apnea type by medical device
First Claim
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1. A method for apnea discrimination, the method comprising:
- sensing an impedance-based tidal volume signal to monitor a respiratory cycle of a patient;
detecting a reduction in tidal swing using the sensed impendence to detect an apnea event; and
when the apnea event is detected, comparing a shape of the sensed signal to a stored signal shape to determine whether the apnea event is primarily an obstructive sleep apnea (OSA) event or primarily a central sleep apnea (CSA) event.
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Abstract
Disclosed herein, among other things, are methods and apparatus related to identification of apnea type. One aspect of the present subject matter provides a method for real-time apnea discrimination. The method includes sensing an impedance-based tidal volume signal to monitor a respiratory cycle of a patient, and detecting a reduction in tidal swing using the sensed impendence to detect an apnea event. When the apnea event is detected, a shape of the sensed signal is compared to a stored signal shape to determine whether the apnea event is primarily an obstructive sleep apnea (OSA) event or primarily a central sleep apnea (CSA) event, in various embodiments.
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Citations
16 Claims
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1. A method for apnea discrimination, the method comprising:
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sensing an impedance-based tidal volume signal to monitor a respiratory cycle of a patient; detecting a reduction in tidal swing using the sensed impendence to detect an apnea event; and when the apnea event is detected, comparing a shape of the sensed signal to a stored signal shape to determine whether the apnea event is primarily an obstructive sleep apnea (OSA) event or primarily a central sleep apnea (CSA) event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device for apnea discrimination, the device comprising:
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a sensor configured to sense an impedance-based tidal volume signal to monitor a respiratory cycle of a patient; and a processor adapted to be connected to the sensor, the processor configured to detect a reduction in tidal swing using the sensed impendence to detect an apnea event and to compare a shape of the sensed signal to a stored signal shape to determine whether the detected apnea event is primarily an obstructive sleep apnea (OSA) event or primarily a central sleep apnea (CSA) event. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification