A Novel Method to Detect Heat Illness Under Severe Conditions by Monitoring Tympanic Temperature

Yamakoshi, Takehiro; Matsumura, Kenta; Rolfe, P.; Tanaka, N.; Yamakoshi, Yasuhiro; Takahashi, Kiichi

doi:10.3357/asem.3542.2013

Cited by 11 publications

(8 citation statements)

References 12 publications

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“…This approach was further corroborated by results from Yamakoshi et al, who reported good correlation of T values measured by an in-ear customized molded IR sensor with values measured by a thermistor-based tympanic sensor ( r 2 = 0.97, p < 0.01, bias = −0.01°C) and by gastrointestinal pills ( r 2 = 0.86, p < 0.001, bias = −0.27°C) in subjects under hyperthermic conditions. The earpiece device, connected to a full-face helmet, sensor amplifier, and signal processor, was also preliminarily tested in-field on professional drivers during real racing conditions and displayed good technical functioning, although no comparison with core T were performed in this setting (Yamakoshi et al, 2013 ).…”

Section: Resultsmentioning

confidence: 99%

Hearables: New Perspectives and Pitfalls of In-Ear Devices for Physiological Monitoring. A Scoping Review

2020

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Technological advancements are opening the possibility of prolonged monitoring of physiological parameters under daily-life conditions, with potential applications in sport science and medicine, and in extreme environments. Among emerging wearable technologies, in-ear devices or hearables possess technical advantages for long-term monitoring, such as non-invasivity, unobtrusivity, good fixing, and reduced motion artifacts, as well as physiological advantages related to the proximity of the ear to the body trunk and the shared vasculature between the ear and the brain. The present scoping review was aimed at identifying and synthesizing the available evidence on the use and performance of in-ear monitoring of physiological parameters, with focus on applications in sport science, sport medicine, occupational medicine, and extreme environment settings. Pubmed, Scopus, and Web of Science electronic databases were systematically searched to identify studies conducted in the last 10 years and addressing the measurement of three main physiological parameters (temperature, heart rate, and oxygen saturation) in healthy subjects. Thirty-nine studies were identified, 24 performing temperature measurement, 12 studies on heart/pulse rate, and three studies on oxygen saturation. The collected evidence supports the premise of in-ear sensors as an innovative and unobtrusive way for physiological monitoring during daily-life and physical activity, but further research and technological advancement are necessary to ameliorate measurement accuracy especially in more challenging scenarios.

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Section: Resultsmentioning

confidence: 99%

Hearables: New Perspectives and Pitfalls of In-Ear Devices for Physiological Monitoring. A Scoping Review

2020

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“…In contrast to monotonous driving, it is of great interest to consider whether or not RBED could enhance driving performance and physiological behavior in scenarios such as motor racing. Racing drivers face extreme levels of physical, mental, and thermal stress (Matsumura et al 2011; Yamakoshi et al 2010; Yamakoshi et al 2013), which RBED could potentially alleviate, thereby helping drivers maintain better concentration. Further investigations of this scenario will therefore be needed in a driving simulator and in real racing conditions.…”

Section: Discussionmentioning

confidence: 99%

Cardiovascular hemodynamic effects of Red Bull® Energy Drink during prolonged, simulated, monotonous driving

et al. 2013

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Purpose: The purpose of this study was to investigate the cardiovascular hemodynamic effects of Red Bull® Energy Drink during prolonged, simulated, monotonous driving. Methods: This was a double-blind, within-subjects-design, crossover study. Twelve healthy volunteers (21.7 ± 0.8 years old) experienced each of three conditions at various times: 1) consumption of Red Bull® Energy Drink; 2) consumption of placebo-controlled drink; and 3) no test drink. All subjects undertook 90-min periods of simulated monotonous driving, during which physiological measurements were made. The variables recorded were cardiovascular indices, i.e., mean blood pressure (MBP), cardiac output (CO), electrocardiogram RR interval (RR), total peripheral-vascular resistance (TPR: = MBP/CO), and normalized pulse volume (NPV). Additional parameters were the standard deviation of lateral position, i.e., the weaving of the car, and subjective rating of sleepiness.Results: CO, RR, and TPR during the monotonous task were significantly different in those consuming the energy drink as compared with those receiving the placebo and as compared with no drink values. The energy drink elicited a cardiac-dominant reaction pattern, while the other conditions demonstrated the vascular-dominant reaction pattern typically observed in monotonous driving tasks. The observed differences indicate the cardiovascular system being more aroused with the energy drink. Conclusion: The effects of Red Bull® Energy Drink were reflected in cardiovascular hemodynamic phenomena especially to the heart function, and we conclude that consumption of this drink before long-distance driving in non-sleepy drivers could facilitate more physiologically active, and possibly safer, driving.

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“…Although technically possible [5,11], the regulations of this race category in Japan do not permit such measurements during races. Only permissible parameters during an actual Japanese GT race were measured in the present study.…”

Section: Limitationsmentioning

confidence: 97%

“…Core temperature might increase during summer races [5,10,11]. We postulated that the average HR would increase with increasing cabin temperatures.…”

Section: Thermal Stress and Heatstrokementioning

confidence: 97%

“…Based on a few case reports and preliminary reports, heart rate (HR) increases during car races [2][3][4][5][6]. Gravitational loading, psycho-physiological influence [2][3][4][7][8][9] and thermal stress [5,10,11] can be considered the main factors involved in increased HR. Therefore, it is hypothesized that driving at faster relative speeds and under hot condition would induce a higher average HR during professional car races.…”

Section: Introductionmentioning

confidence: 99%

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Speed ratio but cabin temperature positively correlated with increased heart rates among professional drivers during car races

Yanagida

Takahashi²,

Miura

et al. 2016

Environ Health Prev Med

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The cardiovascular system of drivers is considerably stressed at extremely high HR. This high average HR positively correlated with mean speed ratio, suggesting that faster driving speed would induce greater cardiovascular stress to professional drivers during actual races. However, contrary to our hypothesis, cabin temperature was not significantly correlated with average HR. It is speculated that direct body cooling systems used in this professional race category work well against increases in HR by thermal stress under the temperature range found herein.

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A Novel Method to Detect Heat Illness Under Severe Conditions by Monitoring Tympanic Temperature

Abstract: The new method was found to perform well in an extreme car racing setting. It has the potential to be used in other applications, including the industrial and aerospace sectors.

Cited by 11 publications

References 12 publications

Hearables: New Perspectives and Pitfalls of In-Ear Devices for Physiological Monitoring. A Scoping Review

Hearables: New Perspectives and Pitfalls of In-Ear Devices for Physiological Monitoring. A Scoping Review

Cardiovascular hemodynamic effects of Red Bull® Energy Drink during prolonged, simulated, monotonous driving

Speed ratio but cabin temperature positively correlated with increased heart rates among professional drivers during car races

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