Effect of Insufficient Environmental Brightness on Musculoskeletal System of Human Care Workers

环境亮度不足对护理人员肌肉骨骼系统的影响

• 批准号: 10670342
• 负责人: SEO Akihiko
• 金额: $ 2.05万
• 依托单位: Fukui Medical University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10670342/
• 关键词: Environmental brightness; Working posture; Work space; Human care work; Musculoskeletal system; 照度; 腰痛

The effect of brightness on work style was studied to assess the working conditions of human care workers who often work under insufficient brightness in night.1. To record the relative position of a subject in a work place, a software that controls the electromagnetic position measuring apparatus was developed.2. Using the developed system, a baggage handling work was measured at the environmental brightness of 1, 10, 40 and 150 Lx. Ten subjects brought 8 boxes between the low and high tables for three times. Total work time was increased in the darker condition. The postural variation indicated by the standard deviation of the trunk inclination was also increased. The subjective complaint of difficulty for working was remarkable at 1 Lx. The effect of brightness was clear in mental stress, not in physical stress.3. The effect of environmental brightness on a model work of human care was studied at 1, 10, 40 and 400 Lx. Four subjects attended the experiment as both workers and patients. The worker transferred the patient from the bed to wheelchair by manual. It consists of three steps; (1) preparation step to make the patient to sit on the bed, (2) transfer step, and (3) settlement step to set the feet of the patient on the foot steps of wheelchair. The workers tended to keep more distance from the bed at the preparation step in the darker condition. At the settlement step, workers tended to keep their face near to the foot steps. No positional and postural differences were observed at the transfer step. The subjective complaint of increase in mental stress and uncertainty of footstep was clear when working darker condition.

研究了亮度对工作方式的影响，以评估经常在夜间亮度不足的情况下工作的人类护理人员的工作条件。为了记录工作场所中物体的相对位置，开发了电磁位置测量仪的控制软件.使用开发的系统，行李处理工作进行了测量，在环境亮度为1，10，40和150 Lx。10名受试者将8个盒子放在高低桌之间，共3次。在较暗的条件下，总工作时间增加。躯干倾斜度的标准差所表示的姿势变化也增加了。在1 Lx时，工作困难的主观抱怨是显著的。亮度对心理应激的影响明显，而对生理应激的影响不明显.在1、10、40和400 Lx下研究了环境亮度对人类护理模型工作的影响。四名受试者以工人和病人的身份参加了实验。工作人员用手将病人从床上转移到轮椅上。它包括三个步骤;（1）准备步骤，使患者坐在床上;（2）转移步骤，以及（3）安置步骤，将患者的脚放置在轮椅的脚踏板上。在黑暗条件下，工人在准备阶段倾向于与床保持更大的距离。在安置步骤，工人倾向于保持他们的脸靠近脚下的步骤。在转移步骤中未观察到位置和姿势差异。在较暗的环境下工作时，心理压力增加和脚步不确定感的主观主诉明显。