| CPC A61B 5/1115 (2013.01) [A61B 5/002 (2013.01); A61B 5/0205 (2013.01); A61B 5/6889 (2013.01); A61B 5/7275 (2013.01); G16H 40/20 (2018.01); G16H 40/63 (2018.01)] | 8 Claims |
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1. A bed-leaving prediction server device connected through a digital communication network to: an information processing terminal for care staff who care for a care recipient; an environmental sensor configured to detect at least one environment value of temperature, humidity, and illuminance in a room where the care recipient stays; an infrared sensor installed to include a sleeping furniture in the room in a sensing area; and a sleeping furniture sensor configured to detect movement of the care recipient on the sleeping furniture, the bed-leaving prediction server device comprising:
a computing section configured to repeatedly compute, based on an output of the infrared sensor, a movement-amount indicator that depends on an amount of movement of the care recipient on the sleeping furniture, and configured to repeatedly compute, based on an output of the sleeping furniture sensor, a pulse rate of the care recipient, a posture indicator for discerning a posture: lying flat; sitting; or sitting up with legs outstretched, a rolling-over indicator for discerning rolling over: rolling over to left; leftward movement; rightward movement; rolling over to right; or no movement, a body movement indicator for discerning between body movement and resting states, and a sleep indicator for discerning between sleeping and waking;
a calculating section configured to calculate a bed-leaving prediction value indicative of a degree of possibility that the care recipient leaves the sleeping furniture after a second time interval has expired since a prediction calculation processing time point based on: a plurality of the environment values detected in a time period between the prediction calculation processing time point and a time point before expiration of a first time interval; and a plurality of the movement-amount indicators, a plurality of the pulse rates, a plurality of the posture indicators, a plurality of the rolling-over indicators, a plurality of the body movement indicators, and a plurality of the sleep indicators, which are computed based on outputs of the sleeping furniture sensor in the time period; and
a notification processing section configured to transmit a bed-leaving notification to the information processing terminal when the bed-leaving prediction value exceeds a threshold value, the bed-leaving notification indicating that the care recipient leaves the sleeping furniture after the second time interval expires.
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