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;
determining, for each half wave, whether the duration is within a range of a plurality of different duration ranges, and whether the amplitude of said half wave is within a range of a plurality of different amplitude ranges, each different duration range having a preset minimum duration threshold and a preset maximum duration threshold, each different amplitude range having a preset minimum amplitude threshold and a preset maximum amplitude threshold;
for each duration range of the plurality of different duration ranges, counting a number of occurrences of half waves within said each duration range for each amplitude range of the plurality of different amplitude ranges; 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 amplitude ranges and specified duration ranges correspond 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.
34 Citations
22 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; determining, for each half wave, whether the duration is within a range of a plurality of different duration ranges, and whether the amplitude of said half wave is within a range of a plurality of different amplitude ranges, each different duration range having a preset minimum duration threshold and a preset maximum duration threshold, each different amplitude range having a preset minimum amplitude threshold and a preset maximum amplitude threshold; for each duration range of the plurality of different duration ranges, counting a number of occurrences of half waves within said each duration range for each amplitude range of the plurality of different amplitude ranges; 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 amplitude ranges and specified duration ranges correspond 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, 18, 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; determining, for each half wave, whether the duration and the amplitude of said half wave is within a bin of a plurality of different bins, each bin being characterized by a duration range having a preset minimum duration and a preset maximum duration and an amplitude range having a preset minimum amplitude and a preset maximum amplitude; counting, for each bin, a number of occurrences of half waves within said 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 correspond to the at least one sleep state or stage.
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Specification