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Updated: Jun 9, 2025
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A Preclinical Model of Exertional Heat Stroke in Mice
Published on: July 1, 2021
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不同热环境中的热应变 野外徒步旅行 消防服装
Nathan E Bartman1, Hayden W Hess1, Deanna Colburn2
1Center for Research and Education in Special Environments (CRESE), Department of Exercise and Nutrition Sciences, University at Buffalo, Buffalo NY 14214, USA.
概括
高湿度增加了野地消防员的热量应变,即使在相同的热量暴露水平. 防护装备加剧了这种情况,需要在潮湿的条件下采取额外的高温减缓策略.
科学领域:
- 环境生理学环境生理学
- 职业健康 职业健康 职业健康
- 野地消防安全 野地消防安全
背景情况:
- 野地消防员在炎热的环境中承受高强度的工作,冒着高热应变的风险.
- 湿度等环境因素可以影响热应变,而不依赖于环境温度.
- 了解这些细微差别对于消防员的安全和绩效至关重要.
研究的目的:
- 为了比较野地消防员在干燥和潮湿条件下的热应变,在等效的湿球温度 (WBGT) 下.
- 评估湿度对模拟消防工作期间生理和感知反应的影响.
- 为在各种环境条件下工作的野地消防员提供安全协议的信息.
主要方法:
- 12名参与者在三个条件下进行模拟的消防工作 (在40-50%的最大有氧能力下行走):干燥 (40°C,20%的RH),中等湿度 (34°C,50%的RH) 和高湿度 (29°C,90%的RH) 在相当于28°C的WBGT.
- 参与者穿着标准的防火防护装备.
- 测量了核心温度,心率,出汗率,感知到的劳动力和生理上的压力.
主要成果:
- 与干燥条件相比,在中度和高湿度条件下,核心峰值温度显著更高.
- 平均净热量增益在潮湿条件下更大.
- 心率峰值,生理应变指数,感知劳动力和感知应变指数在高湿度和干燥条件之间没有显著差异.
- 全身出汗率和热感也没有在各种条件中显著不同.
结论:
- 潮湿的条件,即使是相当于WBGT,也会导致与干燥的条件相比,穿着防护装备的野地消防员的运动热应变更大.
- 消防员在高湿度环境中工作时应实施增强的超热减轻策略.
- 这项研究强调了湿度在热应变评估中对职业安全的关键作用.
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