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相关概念视频

Requirements for Human Life01:26

Requirements for Human Life

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The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
8.1K
Factors Affecting Respiration01:24

Factors Affecting Respiration

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Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
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Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

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Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
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Variation of Atmospheric Pressure01:18

Variation of Atmospheric Pressure

2.2K
Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
2.2K
Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

121
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
121
Factors Affecting Body Temperature01:28

Factors Affecting Body Temperature

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As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may  include:
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相关实验视频

Updated: Jun 23, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

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高度疾病 高度疾病

Hannes Gatterer1,2, Francisco C Villafuerte3, Silvia Ulrich4

  • 1Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy. Hannes.gatterer@eurac.edu.

Nature reviews. Disease primers
|June 20, 2024
PubMed
概括
此摘要是机器生成的。

高海拔疾病 (HAIs),如AMS,HACE和HAPE,影响全球数百万人. 及时诊断,适应和医疗干预对于管理这些与高度相关的健康风险至关重要.

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Heat-sensitive Moxibustion as a Traditional Chinese Medicine Therapy for Chronic Obstructive Pulmonary Disease Combined with Insomnia
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Heat-sensitive Moxibustion as a Traditional Chinese Medicine Therapy for Chronic Obstructive Pulmonary Disease Combined with Insomnia

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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
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相关实验视频

Last Updated: Jun 23, 2025

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

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Heat-sensitive Moxibustion as a Traditional Chinese Medicine Therapy for Chronic Obstructive Pulmonary Disease Combined with Insomnia
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Heat-sensitive Moxibustion as a Traditional Chinese Medicine Therapy for Chronic Obstructive Pulmonary Disease Combined with Insomnia

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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

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科学领域:

  • 高度医学 高度医学
  • 环境生理学环境生理学
  • 人类对高度的适应

背景情况:

  • 每年有数百万人前往和居住在高海拔地区.
  • 高海拔暴露可能导致急性高海拔疾病 (HAIs),如急性山病 (AMS),高海拔脑 (HACE) 和高海拔肺 (HAPE).
  • 慢性山病 (CMS) 影响永久高山居民.

研究的目的:

  • 审查急性和慢性高海拔疾病的病理生理学,临床表现和管理.
  • 强调适应,预防和及时医疗干预的重要性.
  • 确定未来诊断和易感性研究的领域.

主要方法:

  • 对有关高海拔疾病的现有文献的综述.
  • 综合有关HAI和CMS的机制,症状和治疗方法的信息.
  • 讨论当前的预防策略和诊断挑战.

主要成果:

  • AMS通常是良性的和自我限制,与缺氧诱导的大脑变化有关.
  • HACE和HAPE是危及生命的疾病,需要立即干预,症状包括精神状态的改变,缺氧和呼吸障碍.
  • CMS的特点是过度的红细胞形成,重症病例建议搬迁.

结论:

  • 高血压感染的有效管理涉及补充氧气,下降和药物治疗.
  • 预防措施包括缓慢的登山,预适应和预防药物.
  • 未来的研究应该优先考虑客观的诊断工具,易感性识别和改进的适应策略.