To enable a continuous unobtrusive monitoring of core body temperature on ambulatory patients and exercising athletes we have designed a wireless wearable system that measures the tympanic temperature inside the ear as well as skin and environmental temperature and that allows remote monitoring of the collected measurements. In human medicine a non invasive method to accurately evaluate core body temperature is the zero heat flux zhf technology first described in 1973. An insulator patch applied to the lateral forehead and covered by an electric heater is used to stop surface convection creating an isothermic tunnel from the core body to the skin surface. Core body temperature sensor for wearable and med tech applications. However because of the potential benefits for both patients and hospitals dräger was eager to take on the challenge. The pulmonary artery catheter which measures blood temperature is considered the gold standard for measuring core temperatures.
Core body temperature is an important vital parameter to determine the health status of a person. 1 core body temperature is regulated by both peripheral and central receptors that are integrated within the hypothalamus. Hence the device chosen should combine four elements. The purpose of this study was to evaluate the accuracy of the ds in measuring tc under heat stress. The direct measurement of the temperature of the human body core while being of great significance for the evaluation of patient health is inconvenient. We conducted two human subject studies with different experimental protocols different environmental temperatures 10 c 30 c and different subjects.
Core is the first device that combines a non invasive wearable with continuous measurements of body temperature under real life conditions with great accuracy. Greenteg offers the worlds first core body temperature sensor for continuous and non invasive measurements. The dräger double sensor ds is a novel device for assessing body core temperature tc. This realization has motivated attempts to measure the core temperature indirectly for the most part at locations which do not require invasion of the body. 2 autonomic as well as behavioral responses to changes in temperature maintain homeostasis or a range of normal around 37 c. Wearable non invasive and capable of performing continuous and accurate measurements during free living conditions.
The miniaturized sensor is ideal for the integration into wearable and med tech devices with skin contact. Relevant non invasive measures to predict core body temperature under various conditions. In both studies the same non invasive measurement methods skin. Accuracy and precision of temperature measurement methods all non invasive methods to measure body temperature eg oral axillary tympanic temporal artery have accuracy and precision variances unique to each type of method when compared to core temperature methods eg rectal temperature bridges thomas 2009. The non invasive accurate measurement of core body temperature is a surprisingly complex technical challenge. D 19148 2015 tcore a new non invasive technology.