Daanen Hein A M, Kohlen Veerle, Teunissen Lennart P J
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, the Netherlands.
J Therm Biol. 2023 Feb;112:103480. doi: 10.1016/j.jtherbio.2023.103480. Epub 2023 Jan 14.
Heat flux systems are increasingly used to assess core body temperature. However, validation of multiple systems is scarce. Therefore, an experiment was performed in which three commercially available heat flux systems (3 M, Medisim and Core) were compared to rectal temperature (T). Five females and four males performed exercise in a climate chamber set at 18 °C/50% relative humidity until exhaustion. Exercise duration was 36.3 ± 5.6 min (mean ± standard deviation). T in rest was 37.2 ± 0.3 °C. Medisim's-values were lower than T (36.9 ± 0.4 °C, p < 0.05); 3 M (37.2 ± 0.1 °C) and Core's (37.4 ± 0.3 °C) did not differ from T. Maximal temperatures after exercise were 38.4 ± 0.2 °C (T), 38.0 ± 0.4 °C (3 M), 38.8 ± 0.3 °C (Medisim) and 38.6 ± 0.3 °C (Core); Medisim was significantly higher than T (p < 0.05). The temperature profiles of the heat flux systems during exercise differed to varying degree from the rectal profiles; the Medisim system showed a faster increase during exercise than T (0.48 ± 0.25 °C in 20 min, p < 0.05), the Core system tended to show a systematic overestimation during the entire exercise period and the 3 M system showed large errors at the end of exercise, likely due to sweat entering the sensor. Therefore, the interpretation of heat flux sensor values as core body temperature estimates should be done with care; more research is required to elucidate the physiological significance of the generated temperature values.
热通量系统越来越多地用于评估核心体温。然而，对多种系统的验证却很少。因此，进行了一项实验，将三种市售热通量系统（3M、Medisim和Core）与直肠温度（T）进行比较。五名女性和四名男性在设置为18°C/50%相对湿度的气候室中进行运动，直至精疲力竭。运动持续时间为36.3±5.6分钟（平均值±标准差）。静息时的T为37.2±0.3°C。Medisim的值低于T（36.9±0.4°C，p<0.05）；3M（37.2±0.1°C）和Core（37.4±0.3°C）与T无差异。运动后的最高温度分别为38.4±0.2°C（T）、38.0±0.4°C（3M）、38.8±0.3°C（Medisim）和38.6±0.3°C（Core）；Medisim显著高于T（p<0.05）。运动期间热通量系统的温度曲线与直肠温度曲线在不同程度上有所不同；Medisim系统在运动期间的升高速度比T快（20分钟内升高0.48±0.25°C，p<0.05），Core系统在整个运动期间倾向于系统性高估，3M系统在运动结束时出现较大误差，可能是由于汗液进入传感器所致。因此，将热通量传感器值解释为核心体温估计值时应谨慎；需要更多研究来阐明所生成温度值的生理意义。
