Measuring core body temperature with a non-invasive sensor

Mazgaoker, Savyon; Ketko, Itay; Yanovich, Ran; Heled, Yuval; Epstein, Yoram

doi:10.1016/j.jtherbio.2017.03.007

Cited by 44 publications

(38 citation statements)

References 19 publications

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“…In order to measure the body core temperature in the laboratory conditions, most authors use some of invasive methods, mostly measured in anus, which is considered to be the "golden" standard [14,21]. Values measured by direct methods are considered little reliable as they can show striking differences against values acquired by invasive methods [21,22].…”

Section: Discussionmentioning

confidence: 99%

“…Promising results are from works which calculate the body core temperature from physiological indicators easily measurable in non-rest conditions [14][15][16]23]. However, these methods require scanning the monitored parameters directly from the surface of the monitored person, which might be related with higher or lower level of discomfort and primarily may be the cause of faults and failures of the early warning system.…”

Section: Discussionmentioning

confidence: 99%

“…Its direct measurement in terrain conditions is not possible. The only mini-invasive system for remote monitoring of t c is a thermometer pill, although its routine use is limited due to high costs and results may be influenced by water and food intake [14]. This is the reason to search for methods that would be accurate enough (better than ±0.5°C) to determine the body core temperature from physiological indicators well-measured on the body surface under non-rest conditions.…”

Section: Introductionmentioning

confidence: 99%

“…This is the reason to search for methods that would be accurate enough (better than ±0.5°C) to determine the body core temperature from physiological indicators well-measured on the body surface under non-rest conditions. In the past methods were published to have been based on prediction of the body core temperature from temperature measured at selected places on the skin, thermal flow on the skin and heart rate [14][15][16] or only from the heart rate [17].…”

Section: Introductionmentioning

confidence: 99%

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Verification of electronic device technology for measurement and evaluation of thermal exposure of fire fighters and members of rescue teams

Bernatíková

Tomášková

Bužga

et al. 2017

Med Pr

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Background: The work of members of rescue teams could be associated with very high physical and thermal loads. If not timely interrupted, any extreme labour-thermal load may lead to a failure of the body and fatal collapse. This risk may be significantly reduced by devices that monitor the response of the body during the intervention and inform rescuers about the need to interrupt the exposure when the critical value of the reference indicator is achieved. The aim of the study was to test the correlation between the data of the newly developed device for signaling the strain of rescuers and the indicators of physiological response of the body. Material and Methods: The tests were performed on 2 physically fit fire fighters dressed in a protective rescue suit and using insulating breathing apparatus, over a wide range of heat load under a model load on a bicycle ergometer in a climatic chamber. Results: The study provided a significant correlation between the body temperature measured in the ear canal and the temperature under the suit sensed by the tested device -the Safety Ambient Monitor (SAM) (R = 0.9007). The temperature under the suit also correlated with the temperature of the chest skin (R = 0.8928) and heart rate (R = 0.8613). Conclusions: A statistically significant correlation was proven between the temperature sensed by the SAM and the body temperature. The technical solution of sensing the temperature under the suit using the verified SAM technology does not affect or limit fire fighters in their work and minimizes the possibility of damage to the sensor and signaling failures. Med Pr 2018;69(1):1-11

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Verification of electronic device technology for measurement and evaluation of thermal exposure of fire fighters and members of rescue teams

Bernatíková

Tomášková

Bužga

et al. 2017

Med Pr

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“…Sensors applied to the skin are of great importance as they are part of non-invasive diagnostic techniques [8,9]. New sensors applicable to the skin are currently being developed to determine its thermal conductivity [10] and also to determine the core temperature of the human body [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Method to Determine Human Skin Heat Capacity Using a Non-Invasive Calorimetric Sensor

Rivera

Socorro

Rivera

et al. 2020

Sensors

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A calorimetric sensor has been designed to measure the heat flow dissipated by a 2 × 2 cm2 skin surface. In this work, a non-invasive method is proposed to determine the heat capacity and thermal conductance of the area of skin where the measurement is made. The method consists of programming a linear variation of the temperature of the sensor thermostat during its application to the skin. The sensor is modelled as a two-inputs and two-outputs system. The inputs are (1) the power dissipated by the skin and transmitted by conduction to the sensor, and (2) the power dissipated in the sensor thermostat to maintain the programmed temperature. The outputs are (1) the calorimetric signal and (2) the thermostat temperature. The proposed method consists of a sensor modelling that allows the heat capacity of the element where dissipation takes place (the skin) to be identified, and the transfer functions (TF) that link the inputs and outputs are constructed from its value. These TFs allow the determination of the heat flow dissipated by the surface of the human body as a function of the temperature of the sensor thermostat. Furthermore, as this variation in heat flow is linear, we define and determine an equivalent thermal resistance of the skin in the measured area. The method is validated with a simulation and with experimental measurements on the surface of the human body.

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