This study aims (1) to test the validity of a new non-invasive core thermometer, Cosinuss°, in rest and (2) during firefighting simulation tasks, against invasive temperature pill and inner-ear temperature and (3) to compare the change in core temperature of firefighters when working in two types of protective clothing (traditional turnout gear versus new concept). 11 active firefighters performed twice a selection of tasks during their periodic preventive medical examination and a fire-extinguishing task. Without correction no correlation between the Cosinuss° and thermometer pill (ICC≤0.09, p ≥ 0.154, LoA≥1.37) and a moderate correlation between Cosinuss° and inner-ear infrared (ICC = 0.40, p = 0.044, LoA±1.20) was observed. With individual correction both correlations were excellent (ICC≥0.84, p = 0.000, LoA≤0.30). However, during and after working all correlations were poor and non-significant (ICC≤0.38, p ≥ 0.091, LoA≥1.71). During firefighting tasks, the Cosinuss° is invalid for measuring the core temperature. No differences in heat development in the two types of protective clothing was proven.

中文翻译：

---

监视消防员的体温，以验证不同类型的防护服中的可穿戴式非侵入式体温计：并行体内验证。

这项研究的目的是（1）测试新的非侵入式体温计Cosinuss°在静止状态下的有效性；（2）在进行消防模拟任务时，针对侵入式温度药丸和内耳温度进行测试；以及（3）比较变化穿着两种防护服（传统的道岔防护服与新概念的防护服）一起工作时，消防员的体温会降低。11名现役消防员在进行定期预防性医学检查和灭火时，两次执行了两次选择任务。如果不进行校正，Cosinuss°和体温计药丸之间没有相关性（ICC≤0.09，p≥0.154，LoA≥1.37），Cosinuss°和耳内红外之间没有中等相关性（ICC = 0.40，p = 0.044，LoA±1.20）观测到的。通过单独校正，两个相关性均极好（ICC≥0.84，p = 0.000，LoA≤0.30）。然而，在工作期间和工作之后，所有相关性均较差且不显着（ICC≤0.38，p≥0.091，LoA≥1.71）。在消防任务中，余弦温度对测量核心温度无效。两种防护服在发热量方面均无差异。