在高温天气下,环卫工人患与热有关的疾病的风险很高。然而,一些众所周知的热应力指标在实际应用中存在局限性。本文旨在建立一种新的指标——综合生理指数(CPI)来评价生理安全性。
首先,通过熵值法获得生理参数的实时权重。其次,新的指数-CPI是根据测量值和理想解决方案之间的距离通过与理想解决方案相似度(TOPSIS)的偏好顺序技术建立的。然后验证了CPI的合理性。最后,确定CPI的安全范围。
平均皮肤温度(MST),环卫工人的收缩压(SBP)和舒张压(DBP)受高温影响较大。MST的重量范围,鼓室温度,SBP,DBP和心率分别为0.155-0.274、0.146-0.200、0.173-0.399、0.150-0.298和0.146-0.200。MST的重量,SBP和DBP占比较大,范围从60.1%到70.9%。CPI的危险范围为(0,0.6],而CPI的安全范围为(0.6,1.0]。
CPI可以提供简单且易于测量的生理状态的实时监测。它有可能成为保证夏季环卫工人职业健康的实用指标。
Sanitation workers are at high-risk of suffering from heat-related illnesses in high temperature weather. However, some well-known heat stress indexes have limitations in practical application. This paper aims to establish a new index-comprehensive physiological index (CPI) for evaluating physiological safety.
Firstly, the real-time weights of physiological parameters are obtained by entropy method. Secondly, the new index- CPI is established based on the distance between the measured values and the ideal solutions by the technique for order of preference by similarity to ideal solution (TOPSIS). Then the reasonability of CPI is verified. Finally, the safety range of the CPI is determined.
The mean skin temperature (MST), systolic blood pressure (SBP) and diastolic blood pressure (DBP) of the sanitation workers are greatly affected by the high temperature. The weight range of the MST, tympanic temperature, SBP, DBP and heart rate is 0.155-0.274, 0.146-0.200, 0.173-0.399, 0.150-0.298 and 0.146-0.200, respectively. And the weights of MST, SBP and DBP account for a relatively large proportion, ranging from 60.1% to 70.9%. The danger range of the CPI is (0, 0.6] while the safety range of the CPI is (0.6, 1.0].
The CPI can provide simple and easily-measured real-time monitoring of the physiological status. It has the potential to be a practical index for guaranteeing occupational health for sanitation workers in summer.