Patent ID: 8834363
Filing Date: 2014-09-16
Classification: A61B,A61M

Abstract:
1. A sleep depth determining device for determining an object person's depth of sleep using a sensitivity threshold which is a minimum stimulus intensity that can be sensed by the object person in a sleep state with a predetermined depth of sleep and which maintains the object person's depth of sleep at an intermediate level lower than a maximum level, comprising: a stimulus giving unit that gives the object person a first stimulus with a first stimulus intensity and a second stimulus with a second stimulus intensity greater than the first stimulus intensity; a sense detecting unit that detects whether the object person senses the first stimulus and the second stimulus; a sleep depth determining unit that determines that the object person's depth of sleep is a depth of sleep corresponding to a sensitivity threshold between the first stimulus intensity and the second stimulus intensity when the sense detecting unit detects that the object person does not sense the first stimulus but senses the second stimulus; and a maintenance control unit that determines a condition of a maintenance stimulus to be given to the object person on the basis of the sensitivity threshold in the depth of sleep of the intermediate level so as to maintain the object person's depth of sleep at the intermediate level and causes the stimulus giving unit to give the object person the maintenance stimulus on the basis of the determined condition, after the sleep depth determining unit determines that the object person's depth of sleep is the depth of sleep of the intermediate level.