Toyota Saori, Kogure Takamasa, Kondo Eitaro, Yasuda Ken-Ichi, Ishiuji Yozo, Ebata Toshiya
Paramount Bed Sleep Research Laboratory, PARAMOUNT BED CO., LTD, Tokyo, Japan.
Department of Dermatology, The Jikei University School of Medicine, Tokyo, Japan.
Acta Derm Venereol. 2025 Jan 26;105:adv41414. doi: 10.2340/actadv.v105.41414.
Itching tends to worsen at night in patients with itchy skin diseases, such as atopic dermatitis. Unconscious scratching during sleep can exacerbate symptoms, cause sleep disturbances, or reduce quality of life. Therefore, evaluating nocturnal scratching behaviour is important for better patient care. However, no report exists on the specific detection of overnight scratching behaviour of patients with atopic dermatitis using a non-wearable sensor. A novel algorithm was developed to specifically detect scratching behaviour using a non-wearable sheet-shaped body vibrometer placed under the mattress. To evaluate the algorithm, the sleep of 7 patients with atopic dermatitis and 3 healthy participants was simultaneously measured using an infrared camera and the sheet-shaped body vibrometer. Scratching time was then used as the gold standard, which was determined visually from the infrared video. The proposed method of detecting vibration was compared with the conventional method using the activity score measured by a sheet-shaped body vibrometer. Spearman's correlation coefficients of the conventional and proposed methods were 0.72 and 0.89, respectively. The Bland-Altman plot results confirmed that the proposed method avoided overestimation of scratching time in patients with short scratching times because it excluded activities other than scratching behaviour, such as turning over.
对于患有瘙痒性皮肤病（如特应性皮炎）的患者，瘙痒往往在夜间加重。睡眠期间无意识的搔抓会加重症状、导致睡眠障碍或降低生活质量。因此，评估夜间搔抓行为对于更好地护理患者很重要。然而，尚无关于使用非穿戴式传感器特异性检测特应性皮炎患者夜间搔抓行为的报告。开发了一种新算法，使用放置在床垫下的非穿戴式片状身体振动计特异性检测搔抓行为。为了评估该算法，使用红外摄像机和片状身体振动计同时测量了7名特应性皮炎患者和3名健康参与者的睡眠情况。然后将搔抓时间用作金标准，通过红外视频目视确定。将所提出的检测振动的方法与使用片状身体振动计测量的活动评分的传统方法进行了比较。传统方法和所提出方法的斯皮尔曼相关系数分别为0.72和0.89。布兰德-奥特曼图结果证实，所提出的方法避免了对搔抓时间较短的患者的搔抓时间进行高估，因为它排除了搔抓行为以外的活动，如翻身。
