View clinical trials related to Body Temperature Changes.
Filter by:As the ongoing progression of climate change exposes individuals to elevated temperatures and an escalating frequency of extreme heat events, the risk of more intense and prolonged heat waves raises significant concerns for public health, particularly among vulnerable populations. The physiological response to acute heat stress involves involuntary thermolytic reactions that may strain the cardiovascular system, especially in individuals with pre-existing vulnerabilities. Heat acclimation has been identified as a potential strategy to enhance thermoregulation and mitigate the adverse effects of heat stress. While existing research primarily focuses on athletes and military, this study aims to investigate the impact of a practical heat acclimation strategy, combining passive and active heat exposure, on thermophysiological, cardiovascular and metabolic parameters in healthy overweight adults. The study targets a population at increased risk for heat-related complications, seeking to provide realistic guidelines for broader application when a heat wave appears on the weather forecast.
Cryotherapy after surgery is widely utilised and has numerous practical applications for post-operative rehabilitation. Previous research has suggested that during cold therapy, the skin temperature of the knee should be reduced to 10-15°C to maximise the therapeutic benefits of cooling while avoiding the risk of cold injuries such as nerve damage and frostbite. The temperature to which a cryocompression device should be set in order to achieve a skin temperature within the therapeutic range of 10-15°C is unknown. Furthermore, there is evidence to suggest that the temperature setting of the device does not equal that to which the skin is reduced. Therefore, it is not sufficient to assume that the temperature setting of a cryocompression device accurately reflects the achieved skin temperature. Modern cryotherapy devices mostly consist of some sort of cuff that can be wrapped around the knee, with a connecting tube to a central unit that supplies and circulates cold water to and from the cuff in order to cool the intended body part. The Hilotherm is one such device for use in this way, but its ability to reduce skin temperature to within the target therapeutic range is unknown. The aim of this study is to determine whether the Hilotherm device is capable of reducing skin temperature of the knee to within the 10-15℃ therapeutic range during a standard 30-minute treatment.
In animal models of thermoregulation (how the body regulates heat), heat-sensitive nerve cells that help regulate body temperature have been identified throughout the body (e.g. in muscles, viscera, and blood vessels, among others); however, in human thermoregulation models, only two locations are generally recognized: the core (brain) and the skin. The limited number of recognized locations in humans are likely due to the difficulty in testing these locations in humans, as these locations are typically identified in animals by sedating them, surgically opening them up, stimulating the area of interest with a hot or cold probe, and then measure thermoregulatory responses. Based on the literature, the researchers believe that by having participants run at the same energy expenditure but at three different inclines (uphill, downhill and flat) on a treadmill, the researchers can independently alter muscle temperature, while keeping core and skin temperature the same. Additionally, recent studies have suggested that temperature has a greater role at regulating blood flow through muscle tissue than previously recognized. Because of this, the researchers aim to have a second arm of the study to see whether these differences in muscle temperature result in differences in post-exercise blood flow to the muscle. Finally, downhill running is often used to study exercise-induced muscle damage, due to the greater breaking forces compared to flat land running. Because of this, a third study aim will be to examine the association between fitness level, body morphology and sex on exercise-induced muscle damage.
To evaluate the effectiveness and safety of hypothermia risk prediction combined with active warming management to reduce intraoperative hypothermia in elderly patients undergoing elective general anesthesia, improve the quality of anesthesia management, and enhance patients' awareness of the work of anesthesiologists.
Background: To maintain the body temperature of preterm newborns is one of the essential criteria for discharge from hospital. Aim: we aimed to assess the feasibility and the safety of an early weaning protocol from incubator to unheated cot at 1400 g preterm newborns. Methods: This was a randomized control trial with preterm neonates with birth weights < 1400 g conducted at King Fahad Medical City, Riyadh, Saudi Arabia. We compared newborns weaned to cot at a weight of 1400 g to newborns weaned at a weight of 1600 g. The outcome was to assess the feasibility of the protocol in terms of temperature control and average weight gain. Results: A total of 23 preterm neonates were recruited in this study. The baseline characteristics were similar except for the gestational age was higher in the newborns enrolled to 1400 g group. Early weaning was achieved in 100% of newborns without significant adverse effects on temperature stability or weight gain. Incidence of low and high temperatures per newborn and the average weight gain before and after transfer and after transfer were not different between the two groups. Conclusion: Our results showed the feasibility and safety of 1400 g weaning protocol for preterm newborns, without any adverse effects or increasing the neonatal length of hospital stay. Further investigations in larger patient groups are recommended.
The purpose of this preliminary experiment is to measure the effect of a novel ventilation system on the physiological strain during exercise in high heat load while wearing ballistic protective vest. Ten young and healthy participants will participate in the study. They will all go through a six days heat acclimation period in a heat chamber according to a valid protocol. Afterwards they will be randomly exposed to 4 conditions during four separate consecutive days.