This paper introduces a new method, bed actigraphy (BACT) for user-friendly sleep-wake monitoring. BACT provides a non-intrusive acquisition of activity data, and in particular does not require that sensors be attached to the subject's body. The system consists of four load-sensing cells supporting the bed, an A/D converter, and a microcontroller with appropriate software. The performance of BACT was compared to that of standard polysomnography (PSG) recordings and wrist-worn actigraphy (ACT). Ten normal volunteers underwent overnight PSG recordings and were examined simultaneously with BACT and ACT. An automatic scoring algorithm scored each 30-s epoch of the BACT recordings for either 'Wake' or 'Sleep.' A sleep specialist manually scored the PSG recordings, and the results were divided into 'Wake' and 'Sleep' categories. The three methods showed a significant correlation when compared with in the contingency test. The mean epoch-by-epoch agreements between the BACT and PSG, ACT and PSG, and BACT and ACT recordings were 95.2, 92.9, and 94.3%, respectively. The mean absolute differences in sleep percentage (SP) between them were 1.8 +/- 0.82, 3.4 +/- 1.45, and 1.9 +/- 1.16 %, respectively. BACT differentiation of the 'Wake' and 'Sleep' stages proved to be sufficiently robust, and its results were comparable to PSG analysis. This finding supports the experimental and clinical value of bed-activity monitoring during sleep.

译文

本文介绍了一种用于用户友好的睡眠唤醒监测的新方法,即bed actigraphy (BACT)。BACT提供了活动数据的非侵入式采集,尤其不需要将传感器连接到受试者的身体。该系统由支持床的四个负载传感单元,一个A/D转换器和一个带有适当软件的微控制器组成。将BACT的性能与标准多导睡眠图 (PSG) 记录和腕戴活动图 (ACT) 的性能进行了比较。十名正常志愿者接受了夜间PSG录音,并同时接受了BACT和ACT检查。自动评分算法对BACT录音的每个30年代进行评分,分别为 “唤醒” 或 “睡眠”。睡眠专家手动对PSG录音进行评分,结果分为 “唤醒” 和 “睡眠” 类别。与应急测试相比,这三种方法显示出显着的相关性。BACT和PSG,ACT和PSG以及BACT和ACT记录之间的平均时代协议分别是95.2,92.9和94.3%。他们之间的睡眠百分比 (SP) 的平均绝对差异分别为1.8/- 0.82,3.4/- 1.45和1.9/- 1.16%。事实证明,“觉醒” 和 “睡眠” 阶段的BACT分化足够强大,其结果与PSG分析相当。这一发现支持睡眠期间床活动监测的实验和临床价值。

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