Apparatus and method for monitoring for disordered breathing
First Claim
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1. A method of detecting disordered breathing in an implantable medical device in a patient, comprising:
- monitoring a physiologic characteristic of a patient that is a direct indicator of heart rate with at least one implantable sensor that provides an output signal indicative of the heart rate;
identifying a cyclical variation of the heart rate, the cyclical variation comprising a first period corresponding to a first heart rate alternating with a second period corresponding to a second heart rate greater than the first heart rate;
comparing said cyclical variation to threshold criteria indicative of a sleep disordered breathing event; and
declaring the presence of the disordered breathing episode in the event that there is a positive correlation between the comparison of the cyclical variation and the threshold.
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Abstract
The present invention relates to a device and method for monitoring for sleep disordered breathing or other types of disordered breathing such as Cheyne-Stokes breathing. More specifically, a device and method for detecting disordered breathing is provided that monitors a physiological parameter, which becomes cyclical due to apnea-hyperpnea (or arousal) alternation and provides the basis for the determination of a number of breathing disorder metrics.
125 Citations
18 Claims
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1. A method of detecting disordered breathing in an implantable medical device in a patient, comprising:
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monitoring a physiologic characteristic of a patient that is a direct indicator of heart rate with at least one implantable sensor that provides an output signal indicative of the heart rate; identifying a cyclical variation of the heart rate, the cyclical variation comprising a first period corresponding to a first heart rate alternating with a second period corresponding to a second heart rate greater than the first heart rate; comparing said cyclical variation to threshold criteria indicative of a sleep disordered breathing event; and declaring the presence of the disordered breathing episode in the event that there is a positive correlation between the comparison of the cyclical variation and the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable device for detecting, and optionally, providing a therapy for disordered breathing, comprising:
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means for sensing a physiologic parameter that is a direct indicator of heart rate with an implantable sensor; means for detecting a cyclical variation in the sensed physiologic parameter of a patient, wherein said cyclical variation of the heart rate occurs during an episode of disordered breathing, the cyclical variation comprising a first period corresponding to a first heart rate alternating with a second period corresponding to a second heart rate greater than the first heart rate; means for comparing said cyclical variation to a threshold criteria; and means for setting a disordered-breathing-detected marker in the event that said cyclical variation exceeds the threshold criteria. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification