Devices and methods for monitoring physiological information relating to sleep with an implantable device
First Claim
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1. A method for monitoring physiological information relating to sleep comprising:
- sensing physiological information;
detecting a plurality of half waves in the sensed physiological information based on a local maximum amplitude and a subsequent local minimum amplitude, or based on a local minimum amplitude and a subsequent local maximum amplitude;
determining a duration and an amplitude of each half wave of the plurality of detected half waves;
binning each half wave into a bin of a plurality of different bins based on the determined duration and the amplitude of the half wave, wherein the determined duration is within a range of a plurality of different duration ranges and the determined amplitude of the half wave is within a range of a plurality of different amplitude ranges, each bin being characterized by a duration range having a preset minimum duration threshold and a preset maximum duration threshold and an amplitude range having a preset minimum amplitude threshold and a preset maximum amplitude threshold;
counting, for each bin of the plurality of different bins, a number of occurrences of half waves within the bin; and
determining a detection of an occurrence of at least one sleep state or stage if the number of occurrences of half waves within specified bins corresponds to the at least one sleep state or stage.
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Abstract
Described here are implantable devices and methods for monitoring physiological information relating to sleep. The implantable devices are generally designed to include at least one sensor for sensing physiological information, a processor for processing the physiological information using low computational power to detect a sleep stage, and a battery. The detected sleep stage information may then be used to indicate sleep quality, identify or monitor a medical condition, or guide treatment thereof.
26 Citations
24 Claims
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1. A method for monitoring physiological information relating to sleep comprising:
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sensing physiological information; detecting a plurality of half waves in the sensed physiological information based on a local maximum amplitude and a subsequent local minimum amplitude, or based on a local minimum amplitude and a subsequent local maximum amplitude; determining a duration and an amplitude of each half wave of the plurality of detected half waves; binning each half wave into a bin of a plurality of different bins based on the determined duration and the amplitude of the half wave, wherein the determined duration is within a range of a plurality of different duration ranges and the determined amplitude of the half wave is within a range of a plurality of different amplitude ranges, each bin being characterized by a duration range having a preset minimum duration threshold and a preset maximum duration threshold and an amplitude range having a preset minimum amplitude threshold and a preset maximum amplitude threshold; counting, for each bin of the plurality of different bins, a number of occurrences of half waves within the bin; and determining a detection of an occurrence of at least one sleep state or stage if the number of occurrences of half waves within specified bins corresponds to the at least one sleep state or stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for monitoring physiological information relating to sleep comprising:
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sensing physiological information; detecting a plurality of half waves in the sensed physiological information based on a local maximum amplitude and a subsequent local minimum amplitude, or based on a local minimum amplitude and a subsequent local maximum amplitude; determining a duration and an amplitude of each half wave of the plurality of detected half waves; determining, for each half wave, whether the duration is within a range of a plurality of different duration ranges, and whether the amplitude of the half wave exceeds an amplitude threshold based on background activity of physiological information, each different duration range having a preset minimum duration threshold and a preset maximum duration threshold, for each duration range of the plurality of different duration ranges, counting a number of occurrences of half waves within each duration range; and determining a detection of an occurrence of at least one sleep state or stage if the number of occurrences of half waves exceeding the amplitude threshold and within the specified duration ranges corresponds to the at least one sleep state or stage. - View Dependent Claims (19, 20, 21)
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22. A method for monitoring physiological information relating to sleep comprising:
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sensing physiological information; detecting a plurality of half waves in the sensed physiological information based on a local maximum amplitude and a subsequent local minimum amplitude, or based on a local minimum amplitude and a subsequent local maximum amplitude; determining a duration and an amplitude of each half wave of the plurality of detected half waves; binning each half wave into a bin of a plurality of different bins based on the determined duration and the amplitude of the half wave, wherein the determined duration is within a range of a plurality of different duration ranges and the determined amplitude of the half wave is within a range of a plurality of different amplitude ranges, each bin being characterized by a duration range having a preset minimum duration threshold and a preset maximum duration threshold and an amplitude range having a preset minimum amplitude threshold and a preset maximum amplitude threshold; counting, for each bin of the plurality of different bins, a number of occurrences of half waves within the bin; and determining a detection of an occurrence of at least one sleep state or stage based on a ratio of the number of occurrences of half waves of two specified bins corresponding to the at least one sleep state or stage. - View Dependent Claims (23, 24)
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Specification