System for discriminating sleep state

Details System for discriminating sleep state System for discriminating sleep state

1991-07-12

1992-04-07

Kamm, William E.

Surgery

Truss

Pad

128716, 600 26, A61M 2100, A61B 5024

Patent

active

051018314

ABSTRACT:
A system for discriminating sleep state of human body provides variation indexes representing variation of the biological signal on the basis of first variation amount denoting a tendency of increment in time series of measured biological signal from the starting time of the measurement and second variation amount denoting the temporal variation of the biological signal, and discriminates different sleep state on the basis of distribution density of the variation indexes exceeding a predetermined threshold, whereby NREM and REM sleep periods in particular can be reliably discriminated, to be sufficiently contributive to a transmission of sleep information that ensures a comfortable awakening.

REFERENCES:
patent: 4228806 (1980-10-01), Lidow
patent: 4725824 (1988-02-01), Yoshioka
patent: 4757825 (1988-07-01), Diamond
patent: 4776345 (1988-10-01), Cohen et al.

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