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相关概念视频

Thermal Stress01:09

Thermal Stress

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If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
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Decreased Body Temperature01:29

Decreased Body Temperature

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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

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Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.2K
Thermal Strain01:19

Thermal Strain

1.0K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
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Fractures: Bone Repair01:27

Fractures: Bone Repair

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
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Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

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In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
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相关实验视频

Updated: Jul 4, 2025

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

Published on: November 21, 2017

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在整形外科的热损伤.

Andrea N Rowland1, Oluwatodimu R Raji, David B Nelles

  • 1From the Department of Orthopaedic Surgery, San Francisco Orthopaedic Residency Program (Rowland, and Kondrashov), the Biomechanical Lab, The Taylor Collaboration (Raji), the Department of Orthopaedic Surgery, St. Mary's Medical Center, San Francisco, CA (Nelles, and Kondrashov), and the Department of Orthopaedic Surgery, Kaiser Permanente, Oakland, CA (Jang).

The Journal of the American Academy of Orthopaedic Surgeons
|February 9, 2024
PubMed
概括

在整形外科手术中了解热损伤对于最大限度地减少阴性损伤和利用热和冷治疗至关重要. 这些知识将临床前研究和临床实践联系起来,以获得更安全的患者结果.

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Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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Direct Mouse Trauma/Burn Model of Heterotopic Ossification
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相关实验视频

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科学领域:

  • 整形外科手术 整形外科手术
  • 生物医学工程 生物医学工程
  • 组织力学 组织力学

背景情况:

  • 热损伤是骨科手术的一个重要问题,来自于各种手术技术.
  • 无论是发热还是冷却,都具有治疗潜力,但也带来了造成阳性损伤的风险.
  • 了解组织的热耐受性对于安全的手术实践至关重要.

研究的目的:

  • 阐明骨科手术中热损伤的临床前机制.
  • 突出在骨科手术中热效应的双重性质 (治疗性与破坏性).
  • 强调温度调节在骨科干预中的重要性.

主要方法:

  • 热损伤的临床前机制的审查.
  • 在骨科背景下分析热量产生和冷却效应.
  • 检查组织温度公差的检查.

主要成果:

  • 骨科技术,如挖掘,钻孔,凝固和电,是热损伤的常见来源.
  • 不适当使用热或冷可以导致严重的组织损伤.
  • 了解温度变化潜力和组织耐受性是必不可少的.

结论:

  • 对热损伤机制的彻底理解对于预防阳性损伤和在骨科治疗中利用热效应至关重要.
  • 热性考虑在整形外科的所有子专业中都是直接相关的.
  • 将临床前理解与热原理的临床应用相结合,可以提高患者的安全性和外科疗效.