Non-invasive and wearable thermometer for continuous monitoring of core body temperature under various convective conditions

Matsunaga, Daichi; Tanaka, Yujiro; Seyama, Michiko; Nagashima, Kei

doi:10.1109/embc44109.2020.9176403

Cited by 11 publications

(14 citation statements)

References 8 publications

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“…Wearable systems have shown promise in measuring physiological parameters that can be impacted by heat stress such as heart rate, respiratory rate, cardiac function, and core temperature [ 10 , 13 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], which are valuable predictors of acclimatization to the hot environment. While several of these monitoring systems include multiple technologies built into a shirt or vest, the Slate Safety wearable sensor is attached via an elastic band on the upper arm, and allows for the simultaneous monitoring of estimated core temperature, heart rate, and exertion levels.…”

Section: Discussionmentioning

confidence: 99%

“…Body temperature sensing technologies frequently utilize either photoconductivity, infrared, thermistor, thermoelectric effects, or photodetector technologies to collect the raw data [ 24 , 25 ]. Utilizing these technologies, the estimation of the core temperature based on the skin temperature and perfusion to the skin was shown to be highly accurate (MAE 0.297, MSE 0.133) [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Slate Safety Wearable Device to Ingestible Pill and Wearable Heart Rate Monitor

Callihan

Cole

Stokley

et al. 2023

Sensors

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Background: With the increase in concern for deaths and illness related to the increase in temperature globally, there is a growing need for real-time monitoring of workers for heat stress indicators. The purpose of this study was to determine the usability of the Slate Safety (SS) wearable physiological monitoring system. Methods: Twenty nurses performed a common task in a moderate or hot environment while wearing the SS device, the Polar 10 monitor, and having taken the e-Celsius ingestible pill. Data from each device was compared for correlation and accuracy. Results: High correlation was determined between the SS wearable device and the Polar 10 system (0.926) and the ingestible pill (0.595). The SS was comfortable to wear and easily monitored multiple participants from a distance. Conclusions: The Slate Safety wearable device demonstrated accuracy in measuring core temperature and heart rate while not restricting the motion of the worker, and provided a remote monitoring platform for physiological parameters.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Slate Safety Wearable Device to Ingestible Pill and Wearable Heart Rate Monitor

Callihan

Cole

Stokley

et al. 2023

Sensors

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“…Recently, wearable or attachable biosensing and analytical software advances have provided considerable possibilities to evaluate and estimate physiological information using data obtained from the body surface at medical, healthcare, and sports facilities. For example, parameters including glucose (Karpova et al, 2019; Kudva et al, 2018; Nesaei et al, 2018; Wiorek et al, 2020), cortisol (Parlak et al, 2018), endurance performance (Shiraishi et al, 2018), core body temperature (Matsunaga et al, 2020), and nutrition level (Zhao et al, 2021) can be evaluated. Of the various biomarkers targeted for biosensing, sweat is a preferable choice because sweat is readily accessible and contains important electrolytes, metabolites, amino acids, proteins, and hormones.…”

Section: Introductionmentioning

confidence: 99%

“…performance (Shiraishi et al, 2018), core body temperature (Matsunaga et al, 2020), and nutrition level (Zhao et al, 2021) can be evaluated. Of the various biomarkers targeted for biosensing, sweat is a preferable choice because sweat is readily accessible and contains important electrolytes, metabolites, amino acids, proteins, and hormones.…”

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confidence: 99%

Kinetic changes in sweat lactate following fatigue during constant workload exercise

Okawara

Sawada

Nakashima

et al. 2022

Physiological Reports

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It is useful to investigate various physiological responses induced by fatigue in athletes. Moreover, wearable noninvasive sensors, including sweat sensors, are compatible with fatigue evaluation because of their ease of use, and ability to measure repeatedly and continual data. This cross‐sectional study aimed to clarify how sweat lactate elimination curves obtained during constant workload exercise changed following fatigue. Seventeen recreationally trained males (average age, 20.6 ± 0.8 years) completed two consecutive constant workload exercise tests (at 25% peak power) with rest intervals; the participants were encouraged to perform Test 1 until exhaustion and Test 2 only for 10 min. Subjective fatigue (numerical rating scale with face rating scale), sweat lactate, and sweat rate were measured for 10 min in each test. Subjective fatigue was compared using the Wilcoxon signed‐rank test and time to each constant value between Tests 1 and 2 was compared using paired t‐test. Subjective fatigue significantly increased during Test 2 compared with that during Test 1. After Test 1, the sweat lactate elimination curve demonstrated a leftward shift, as proved by the significantly sooner observation of the peak and constant values of sweat lactate (2, 3, and 4 μA) (p < 0.01). Our preliminary results suggest that the sweat lactate elimination curve is different in the fatigue state. Further research may provide insight in the application of this curve to the evaluation for fatigue.

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“…The advantage was that the probe can measure accurately even when there was a temperature change. Meanwhile, the weakness was that there was still an error in the estimation of readings caused by convective changes (temperature fluctuations) [18]. Based on the description of the results of the literature study that has been described, several things need to be resolved through a new study, namely finding and using an accurate and efficient system in the sense of being stable for the measurement results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Temperature Stability and Accuracy on the Design of Thermometer Calibrator Based on Fuzzy Logic And On/Off Control

Pujiastuti

Pudji

Setiawan

et al. 2022

j.electron.electromedical.eng.med.inform

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A thermometer is a medical device used to measure body temperature. To maintain the accuracy of the thermometer measurement results, periodic calibration is required. Calibration is an activity to determine the conventional correctness of the indicator values of measuring instruments and measuring materials by comparing them with measurement standards that can be traced to national and international standards for units of measure and/or international and certified reference materials. Based on the results of the identification of chronological problems that have been observed, a body thermometer that measures body temperature is needed so and a calibrator is needed to maintain the accuracy of the thermometer. The purpose of this study was to analyze the Temperature Stability and Accuracy of the Body Thermometer Calibrator Based on on-Off Control and Fuzzy Logic Control. The contribution of this research to this tool will use the development of a fuzzy logic control method to produce temperature stability in the Body Thermometer Calibrator (Digital). The method used in this study used fuzzy control and on-off control. The results of this study from the suitability test obtained a maximum error of 0.2% in the fuzzy control and 0.6% in the On-Off control. The average rise time difference for the two controls was 13.53 Seconds. The average settling time difference is 130.46 seconds. The results of this study can be concluded that the Fuzzy System is better than the On / Off system so the Fuzzy system is more suitable for thermometer calibration media.

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Non-invasive and wearable thermometer for continuous monitoring of core body temperature under various convective conditions

Cited by 11 publications

References 8 publications

Comparison of Slate Safety Wearable Device to Ingestible Pill and Wearable Heart Rate Monitor

Comparison of Slate Safety Wearable Device to Ingestible Pill and Wearable Heart Rate Monitor

Kinetic changes in sweat lactate following fatigue during constant workload exercise

Analysis of Temperature Stability and Accuracy on the Design of Thermometer Calibrator Based on Fuzzy Logic And On/Off Control

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