An experimental model of heat storage in working firefighters.
An experimental model of heat storage in working firefighters.
复制标题
工作消防员的蓄热实验模型。
DOI：
10.1080/10903120801907430
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Bogucki,Sandy
中科院分区：
文献类型：
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作者：
VanGelder,CarinM;Pranger,LAlex;Wiesmann,WilliamP;Stachenfeld,Nina;Bogucki,Sandy
目标。建立实验模型，研究消防员在工作状态下的不可补偿热应激。FFS在40°C和个人防护套装(PPE)或18°C和无个人防护套装(PPE)中执行连续任务之前摄入核心温度(TC)胶囊。这两个试验都是在环境舱中进行的，使用自给式呼吸器(SCBA)进行FFS。FFS高温运动和PPE运动再现了UCHS状态。对于两个试验中胶囊有效的每一个Ff，TC升高，Tcmax出现在研究方案完成后。使用PPE时，平均最高温度为38.94°C(±0.37°C)，Tcmax为40.4°C，未使用PPE时，最高温度平均为37.79°C(±0.07°C)。储热量131~1205kJ，平均578kJ(±151.47kJ)，平均210.83kJ(±21.77kJ)。建立了一个模拟室内火力攻击初始阶段的实验模型，以研究火炮内超声速射击的生理过程。热环境和个人防护装备比执行任务所需的体力消耗增加了最大的T_c和储热量，并可能减少意志性疲劳的时间。该模型将允许进行对照研究，以优化工作-休息周期、康复条件和FF的物理调节。
Objective. Develop experimental models to study uncompensable heat stress (UCHS) in working firefighters (FFs).Methods. FFs ingested core temperature (Tc) capsules prior to performing sequential tasks in 40°C andpersonal protective ensemble (PPE), or 18°C andno PPE. Both trials were conducted in an environmental chamber with FFs using self-contained breathing apparatus (SCBA).Results. FFs exercising in heat andPPE reproduced UCHS conditions. For every FF in both trials for whom the capsules worked, Tc was elevated, andTcmaxoccurred after completion of study protocol. Trials with PPE resulted in a mean maximum temperature of 38.94°C (± 0.37°C); Tcmaxreached 40.4°C. Without PPE, maximum Tc averaged 37.79°C (± 0.07°C). Heat storage values ranged from 131 to 1205 kJ, averaging 578 kJ (± 151.47kJ) with PPE and210.83 kJ (± 21.77kJ) without PPE.Conclusions. An experimental model has been developed that simulates the initial phases of an interior fire attack to study the physiology of UCHS in FF. The hot environment andPPE increase maximum Tc andheat storage over that due to the exertion required to perform the tasks andmay decrease time to volitional fatigue. This model will permit controlled studies to optimize work-rest cycles, rehab conditions, andphysical conditioning of FFs.