在温暖水中长时间浸泡期间验证人类温度调节模型
Michael P Castellani1, Timothy P Rioux2, John W Castellani2
1Oak Ridge Institute for Science and Education (ORISE), USA; Thermal and Mountain Medicine Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA, USA.
Computers in biology and medicine
|October 22, 2023
概括
六热调节模型 (SCTM) 准确预测温水浸泡中核心和皮肤温度高达10小时,但需要改进水损失和26°C的预测.
科学领域:
- 环境生理学环境生理学
- 热调节研究 热调节研究
- 人类生存建模人类生存建模
背景情况:
- 自2010年以来,美国海岸警卫队 (USCG) 使用的生存决策援助 (PSDA) 的概率依赖于六温度调节模型 (SCTM).
- 2019年USCG研讨会发现,PSDA偶尔会高估在温暖水域 (>16°C) 的生存时间,因此需要对模型进行验证.
研究的目的:
- 为了验证六温度调节模型 (SCTM) 在长时间的温水浸泡期间的性能.
- 评估SCTM对核心体温 (Tcore),平均皮肤温度 (Tsk) 和蒸发性水损失的预测的准确性.
主要方法:
- 46名受试者在18°C,22°C和26°C的水中从部到下部浸泡了长达10个小时.
- 记录了Tcore,Tsk和水损失的连续测量.
- 用SCTM预测的值与使用根平均平方偏差 (RMSD) 测量数据进行了比较.
主要成果:
- 在18°C和22°C的水中,SCTM对Tcore (RMSD:0.2-0.3°C) 和Tsk (RMSD:0.76-1.44°C) 证明了可接受的准确性.
- 该模型显著低于预测的水损失84%.
- 在26°C的水中,SCTM过度预测了Tcore和Tsk,表明在更高的温度下精度降低.
结论:
- 该SCTM提供了可接受的Tcore和Tsk预测在18°C和22°C的浸泡水中长达10小时.
- 在SCTM的水损失预测中存在重大差异.
- 需要进一步的研究和算法改进,以提高SCTM在更温暖的水域 (26°C) 的准确性,并改善水损失估计,以改善生存预测.
相关概念视频
Thermoregulation
1.0K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
1.0K
Body Temperature
976
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
976
Assessing Body Temperature - Rectal
4.4K
Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
4.4K
Assessing Body Temperature - Axilla
595
Procedural Guide for Assessing Axillary Body Temperature using a Digital Thermometer:
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
595
Assessing Body Temperature - Oral
748
Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
748
Assessing Body Temperature - Temporal Artery
560
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's...
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's...
560


