Sleep stage determination apparatus
First Claim
1. A sleep stage determination apparatus comprising:
- respiratory-signal detection means for detecting a variation of a respiratory signal from the body of a human subject; and
sleep-stage determination means for determining a plurality of sleep stages using only said respiratory-signal variation.
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Abstract
Disclosed is a sleep stage determination apparatus which comprises respiratory-signal detection means for detecting a variation of a respiratory signal from the body of a human subject, and sleep-stage determination means for determining a plurality of sleep stages using only the respiratory-signal variation. The sleep stage determination apparatus of the present invention can eliminate the need for detecting a plurality of biological signals and have simplified sensor and circuit configurations designed to detect only the respiratory signal variation which is relatively easily detectable. This makes it possible to reduce a detection error and achieve enhanced determination accuracy or creditability.
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Citations
14 Claims
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1. A sleep stage determination apparatus comprising:
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respiratory-signal detection means for detecting a variation of a respiratory signal from the body of a human subject; and
sleep-stage determination means for determining a plurality of sleep stages using only said respiratory-signal variation. - View Dependent Claims (2, 3, 14)
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4. A sleep stage determination apparatus comprising:
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respiratory-signal detection means for detecting a variation in a respiratory signal from the body of a human subject; and
sleep-stage determination means for determining a plurality of sleep stages using only said respiratory-signal variation, said sleep-stage determination means including;
in-bed/out-of-bed determination means for determining between an in-bed state and an out-of bed state, based on said respiratory-signal variation;
body-movement determination means for determining the presence and level of a body movement, based on said respiratory-signal variation;
wake determination means and intervening-wake determination means for determining between a wake state and a sleep state, based on a determination result of said body-movement determination means;
sleep-initiation determination means for determining a sleep-initiation state having a transition from the wake state to the sleep state, based on said respiratory-signal variation, and the respective determination results of said in-bed/out-of-bed and wake determination means;
sleep determination means for determining a depth of sleep based on said respiratory-signal variation, and respective determination results of said in-bed/out-of-bed, body-movement, sleep-initiation and wake determination means; and
wake-up determination means for determining a wake-up state based on said respiratory-signal variation, and respective determination results of said in-bed/out-of-bed, body-movement, sleep-initiation, wake and sleep determination means. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification