School of Kinesiology, Lakehead University, Thunder Bay, ON, Canada.
Centre for Research in Occupational Safety and Health, Laurentian University, Sudbury, ON, Canada.
Appl Physiol Nutr Metab. 2023 Dec 1;48(12):946-953. doi: 10.1139/apnm-2023-0149. Epub 2023 Aug 11.
The present study assessed agreement between a wireless sweat rate monitor (KuduSmart® device) and the ventilated capsule (VC) technique for measuring: (i) minute-averaged local sweat rate (LSR), (ii) sweating onset, (iii) sudomotor thermosensitivity, and (iv) steady-state LSR, during passive heat stress and exercise. It was hypothesized that acceptable agreement with no bias would be observed between techniques for all assessed sweating characteristics. On two separate occasions for each intervention, participants were either passively heated by recirculating hot water (49 °C) through a tube-lined garment until rectal temperature increased 1 °C over baseline ( = 8), or a 60 min treadmill march at a fixed rate of heat production (∼500 W, = 9). LSR of the forearm was concurrently measured with a VC and the KuduSmart® device secured within ∼2 cm. Using a ratio scale Bland-Altman analysis with the VC as the reference, the KuduSmart® device demonstrated systematic bias and not acceptable agreement for minute-averaged LSR (1.17 [1.09, 1.27], CV = 44.5%), systematic bias and acceptable agreement for steady-state LSR (1.16 [1.09,1.23], CV = 19.5%), no bias and acceptable agreement for thermosensitivity (1.07 [0.99, 1.16], CV = 23.2%), and no bias and good agreement for sweating onset (1.00 [1.00, 1.00], CV = 11.1%). In total, ≥73% of all minute-averaged LSR observations with the KuduSmart device ( = 2743) were within an absolute error of <0.2 mg/cm/min to the VC, the reference minimum detectable change in measurement error of a VC on the forearm. Collectively, the KuduSmart device may be a satisfactory solution for assessing the sweating response to heat stress where a VC is impractical.
本研究评估了无线汗液率监测仪（KuduSmart® 装置）与通风胶囊（VC）技术在测量以下方面的一致性：（i）分钟平均局部汗液率（LSR），（ii）出汗开始，（iii）出汗热敏性，以及（iv）稳定状态 LSR，在被动热应激和运动期间。假设在评估的所有出汗特征方面，两种技术之间将观察到可接受的无偏差一致性。对于每种干预措施，参与者在两次单独的场合中，要么通过使热水（49°C）在管衬服装中循环来被动加热，直到直肠温度比基线升高 1°C（= 8），要么以固定的产热速率（约 500 W，= 9）进行 60 分钟的跑步机行军。前臂的 LSR 同时用 VC 和固定在约 2 cm 内的 KuduSmart® 装置进行测量。使用比率标度 Bland-Altman 分析，以 VC 作为参考，KuduSmart® 装置显示出系统偏差和不可接受的平均 LSR 一致性（1.17 [1.09，1.27]，CV = 44.5%），系统偏差和稳态 LSR 可接受的一致性（1.16 [1.09，1.23]，CV = 19.5%），热敏性无偏差和可接受的一致性（1.07 [0.99，1.16]，CV = 23.2%），以及出汗开始无偏差和良好的一致性（1.00 [1.00，1.00]，CV = 11.1%）。总的来说，KuduSmart 设备的所有平均 LSR 观察值中，有≥73%（= 2743）的观察值与 VC 的绝对误差<0.2 mg/cm/min，这是 VC 在前臂上的测量误差的最小可检测变化。总体而言，在 VC 不切实际的情况下，KuduSmart 设备可能是评估热应激出汗反应的令人满意的解决方案。
