High altitude retinopathy (HAR) is a common ocular disorder that occurs on ascent to high altitude. There are many clinical symptoms, retinal vascular dilatation, retinal edema and hemorrhage are common. These usually do not or slightly affect vision; rarely, severe cases develop serious or permanent vision loss. At present, the research progress of HAR mainly focuses on hemodynamic changes, blood-retinal barrier damage, oxidative stress and inflammatory response. Although the related studies on HAR are limited, it shows that HAR still belongs to hypoxia, and hypobaric hypoxia plays an aggravating role in promoting the development of the disease. Various studies have demonstrated the correlation of HAR with acute mountain sickness (AMS) and high-altitude cerebral edema (HACE), so a deeper understanding of HAR is important. The slow ascent rates and ascent altitude are the key to preventing any altitude sickness. Research on traditional chinese medicine (TCM) and western medicine has been gradually carried out. Further exploration of the pathogenesis and prevention strategies of HAR will provide better guidance for doctors and high-altitude travelers.
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http://dx.doi.org/10.1016/j.tmaid.2024.102689 | DOI Listing |
Digit Health
December 2024
Department of Sport Science, University of Innsbruck, Innsbruck, Austria.
We read with interest the paper on "Smartwatch measurement of blood oxygen saturation for predicting acute mountain sickness: Diagnostic accuracy and reliability" recently published by Zeng and colleagues in Digital Health. This study demonstrated good reliability and high precision for measuring peripheral oxygen saturation (SpO) using Huawei smartwatches during a 1-wk high altitude exposure. In addition, SpO values recorded during the ascent to high altitude were predictive for the development of acute mountain sickness (AMS).
View Article and Find Full Text PDFIntroduction: Managing cognitive demand is critical for aviation safety. Yet, accurately assessing pilot workload during complex flight maneuvers remains challenging. This study evaluated an integrated methodology combining real-time cognitive engagement indicators to provide a comprehensive assessment and assess the reliability of physiological and subjective measures for monitoring operator state.
View Article and Find Full Text PDFAerosp Med Hum Perform
November 2024
Background: Ejection seats are designed to be a lifesaving device for aircrew in emergencies. Modern ejection seats are widely prevalent in fighter and bomber aircraft and are occasionally associated with acceleration injury from axial loading (Gz) during the catapult phase of ejection, limb flail injury due to windblast, or parachute landing fall, especially if the ejection is outside of the seat's performance envelope.
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View Article and Find Full Text PDFWaste Manag
December 2024
Cooperative Program for Resources Engineering, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
The proliferation of space debris poses a significant challenge in modern space exploration, with potential repercussions for the future space environment and activities. Various research and technological developments have addressed these concerns, including estimating the number of space debris orbiting the Earth and its efficient removal. This paper proposes a novel resource-oriented perspective on space debris and focuses on the composition and resource potential of space debris.
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