Готові списки джерел за темами / Altitude exposure

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Добірка наукової літератури з теми "Altitude exposure"

Автор: Grafiati
Опубліковано: 10 січня 2023
Оновлено: 28 січня 2023

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Статті в журналах з теми "Altitude exposure"

1

Hsieh, David T., Graham I. Warden, Jay M. Butler, Erika Nakanishi, and Yuri Asano. "Multiple Sclerosis Exacerbation Associated With High-Altitude Climbing Exposure." Military Medicine 185, no. 7-8 (December 11, 2019): e1322-e1325. http://dx.doi.org/10.1093/milmed/usz421.

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Abstract The spectrum of the neurological effects of high-altitude exposure can range from high-altitude headache and acute mountain sickness, to the more severe end of the spectrum with high-altitude cerebral edema. In general, patients with known unstable preexisting neurological conditions and those patients with residual neurological deficits from a preexisting neurological condition are discouraged from climbing to high altitudes because of the risk of exacerbation or worsening of symptoms. Although multiple sclerosis exacerbations can be triggered by environmental factors, high-altitude exposure has not been reported as a potential trigger. We are reporting the case of a multiple sclerosis exacerbation presenting in an active duty U.S. Air Force serviceman upon ascending and descending Mt. Fuji within the same day.
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2

Hodkinson, P. "Acute Exposure to Altitude." Journal of the Royal Army Medical Corps 157, no. 1 (March 1, 2011): 85–91. http://dx.doi.org/10.1136/jramc-157-01-15.

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3

Dillard, Thomas A., Allan P. Rosenberg, and Benjamin W. Berg. "Hypoxemia During Altitude Exposure." Chest 103, no. 2 (February 1993): 422–25. http://dx.doi.org/10.1378/chest.103.2.422.

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4

Li, Yuan, Mei-Yi Wang, Meng Xu, Wen-Ting Xie, Yu-Ming Zhang, Xi-Yue Yang, Zhi-Xin Wang, et al. "High-Altitude Exposure and Time Interval Perception of Chinese Migrants in Tibet." Brain Sciences 12, no. 5 (April 29, 2022): 585. http://dx.doi.org/10.3390/brainsci12050585.

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High-altitude exposure can negatively impact one’s ability to accurately perceive time. This study focuses on Chinese migrants who have traveled to the Tibetan plateau and explores the effects of high-altitude exposure on their time interval judgment abilities based on three separate studies. In Study 1, it was found that exposure to high altitudes negatively impacted the time interval judgment functions of the migrants compared with a low-altitude control group; they exhibited a prolonged response time (540 ms: p = 0.006, 95% CI (−1.70 −0.32)) and reduced accuracy (1080 ms: p = 0.032, 95% CI (0.06 1.26)) in certain behavioral tasks. In Study 2, the results showed that high-altitude exposure and sleepiness had an interactive effect on time interval judgment (1080 ms) (p < 0.05, 95% CI (−0.83 −0.40)). To further verify our interaction hypothesis, in Study 3, we investigated the time interval judgment of interactions between acute high-altitude exposure and sleepiness level. The results revealed that the adaptation effect disappeared and sleepiness significantly exacerbated the negative effects of high-altitude exposure on time interval judgment (p < 0.001, 95% CI (−0.85 −0.34)). This study is the first to examine the effects of high-altitude exposure on time interval judgment processing functions and the effects of sleep-related factors on individual time interval judgment.
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5

Foss, Joshua L., Keren Constantini, Timothy D. Mickleborough, and Robert F. Chapman. "Short-term arrival strategies for endurance exercise performance at moderate altitude." Journal of Applied Physiology 123, no. 5 (November 1, 2017): 1258–65. http://dx.doi.org/10.1152/japplphysiol.00314.2017.

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For sea level-based endurance athletes who compete at moderate and high altitudes, many are not logistically able to arrive at altitude weeks before the event to fully acclimatize. For those who can only arrive at altitude the night before competition, we asked if there is a physiological and performance advantage in reducing altitude exposure time to 2 h before competition. On three separate visits, 10 cyclists completed overnight laboratory exposures of: 1) a 14-h exposure to normobaric hypoxia (16.2% O2, simulating 2,500 m; 14H), 2) a 12-h exposure to normoxia, then a 2-h hypoxic exposure (2H), and 3) a 14-h exposure to normoxia (CON). Immediately following each exposure, subjects completed a 20-km cycle ergometry time trial in normoxia (CON) or 16.2% O2 (14H and 2H). Measures of plasma volume changes, sleep quality, ventilatory acclimatization, perceived exertion, oxygen uptake, and 20-km time were collected. No significant differences were observed in performance measures or perceived exertion between hypoxic trials. Plasma volume loss was significantly greater during 14H than 2H and CON. No differences in ventilatory acclimatization or sleep quality were observed between trials. Although some divergent 20-km performance responses were observed between 14H and 2H, they were not explained by the physiological measures completed. The data suggest that endurance athletes who are logistically restricted from arriving at altitude more than the evening before competition would not gain an advantage by delaying their arrival until a few hours before the competition, although unique individual responses may ultimately influence optimal arrival strategy. NEW & NOTEWORTHY For athletes who cannot arrive at altitude multiple days before an endurance competition to properly acclimatize, this study asked if shortening hypoxic exposure time to 2 h before a competition was more advantageous than arrival at altitude the evening before competition. Our data suggest that athletes who cannot arrive at altitude with adequate time for complete acclimatization can choose the short-term arrival strategy that best fits with the logistics of their travel.
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Chen, Xin, Aibao Zhou, Junle Li, Bing Chen, Xin Zhou, Hailin Ma, Chunming Lu, and Xuchu Weng. "Effects of Long-Term Exposure to 2260 m Altitude on Working Memory and Resting-State Activity in the Prefrontal Cortex: A Large-Sample Cross-Sectional Study." Brain Sciences 12, no. 9 (August 28, 2022): 1148. http://dx.doi.org/10.3390/brainsci12091148.

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It has been well established that very-high-altitude (>4000 m) environments can affect human cognitive function and brain activity. However, the effects of long-term exposure to moderate altitudes (2000–3000 m) on cognitive function and brain activity are not well understood. In the present cross-sectional study, we utilized an N-back working memory task and resting-state functional near-infrared spectroscopy to examine the effects of two years of exposure to 2260 m altitude on working memory and resting-state brain activity in 208 college students, compared with a control group at the sea level. The results showed that there was no significant change in spatial working memory performance after two years of exposure to 2260 m altitude. In contrast, the analysis of resting-state brain activity revealed changes in functional connectivity patterns in the prefrontal cortex (PFC), with the global efficiency increased and the local efficiency decreased after two years of exposure to 2260 m altitude. These results suggest that long-term exposure to moderate altitudes has no observable effect on spatial working memory performance, while significant changes in functional connectivity and brain network properties could possibly occur to compensate for the effects of mild hypoxic environments. To our knowledge, this study is the first to examine the resting state activity in the PFC associated with working memory in people exposed to moderate altitudes.
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7

Huang, Hsien-Hao, Chih-Ly Han, Horng-Chin Yan, Woei-Yau Kao, Chu-Dang Tsai, David Hung-Tsang Yen, Chun-I. Huang, and Wei-Teing Chen. "Oxidative stress and erythropoietin response in altitude exposure." Clinical & Investigative Medicine 31, no. 6 (December 1, 2008): 380. http://dx.doi.org/10.25011/cim.v31i6.4925.

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Purpose: Oxidative stress and erythropoietin (EPO) levels are increased following high altitude exposure. We hypothesized that the altitude-oxidative stress and EPO response would be associated with the presence or absence of acute mountain sickness (AMS) in subjects exposed at high altitude. Methods: The study enrolled 29 healthy volunteers exposed at altitudes without strenuous physical exercise. Oxidative stress was determined by the spectrophotometric measurement of the colour occurring during the reaction of malondialdehyde (MDA) with thiobarbituric acid (TBA) on blood samples. Ferritin and EPO were also measured simultaneously. Results: During a rise in altitude at 2000 and 3000 m, there were no changes in plasma ferritin level in either of the 2 groups with or without AMS. In contrast, EPO increased at an altitude of 3000 m and after returning to sea level (28.2±2.7, 26.9±3.3 vs 12.2±1.4 and 17.1±1.6, P < 0.05, in group without AMS; 29.3±4.5, 22.8±2.7 vs 10.6±1.0 and 16.1±1.5, # P < 0.05, in group with AMS; compared with the baseline level and at the height of 2000 meters). At a height of 3000 m, plasma MDA level was elevated compared with that at the altitude of baseline and 2000 m in both groups of subjects with and without AMS (3.77±0.29 vs 1.14±0.17, and 1.64±0.22, P < 0.001, in subjects with AMS; 3.65±0.39 vs 1.71±0.21, and 1.73±0.21, P < 0.001, in subjects without AMS) . After returning to sea level, subjects without AMS had lower MDA oxidative stress compared with those with AMS (2.58±0.26 vs 3.51±0.24, P = 0.0223). Along with a rise in altitude, the oxidative stress in these both groups was not correlated with the changes in EPO (r2 = 0.0728, P = 0.1096). Conclusion: High altitude-induced oxidative stress, detected by MDA assay, is not different between the two groups of subjects with and without AMS. Upon return to sea level, subjects without AMS had lower MDA oxidative stress burden and higher EPO level than those with AMS. Whether the subjects with altitude illness had delayed recovery from oxidative stress merits further investigation.
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Bhaumik, Gopinath, Deepak Dass, Dishari Ghosh, Kishan Singh, and Maram Prasanna Kumar Reddy. "Effect of intermittent normobaric hypoxia exposure on acclimatization to high altitude by air induction." Asian Journal of Medical Sciences 12, no. 10 (October 1, 2021): 58–63. http://dx.doi.org/10.3126/ajms.v12i10.38266.

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Background: In emergency like condition, defence personnel are deployed to high altitude without proper acclimatization. Maladaption at high altitude leads to high altitude illness like acute mountain sickness (AMS), high altitude pulmonary edema (HAPE) and high-altitude cerebral edema (HACE) which hampers the operational capabilities. Aims and Objectives: The aim of the present study was to assess the effect of intermittent normobaric hypoxia exposure (IHE) at sea level on different physiological responses during initial days of acclimatization at 3500m and 4000m altitudes in acute induction. Materials and Methods: The IHE subjects were exposed to 12% FIO2 (equivalent altitude 14500 ft) for 4 hrs/day for 4 consecutive days at sea level and 5th day they were inducted by air to 3500m altitude. Baseline recording of different physiological parameters like cardiovascular, respiratory, oxygen saturation and AMS score were measured at sea level as well as 3500m altitude on daily basis for 6 days to assess acclimatization status. To confirm acclimatization status at 3500m, on fifth day the IHE group subjects were transported by road to 4000m and again measured different basal physiological parameters (like cardiovascular, oxygen saturation and AMS score) for four consecutive days. Results: Different physiological parameters of IHE treated group were stabilized by day 4 of air induction at 3500m altitude. Whereas, at 4000m altitude, these parameters were stabilized by day 2 of induction. Conclusion: Acclimatization schedules of four days at 3500m and two days at 4000m are essential to avoid malacclimatization/or high-altitude illness.
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Weinstein, Y., M. H. Bernstein, P. E. Bickler, D. V. Gonzales, F. C. Samaniego, and M. A. Escobedo. "Blood respiratory properties in pigeons at high altitudes: effects of acclimation." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 249, no. 6 (December 1, 1985): R765—R775. http://dx.doi.org/10.1152/ajpregu.1985.249.6.r765.

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Many birds thrive at high altitudes where environmental temperatures are low. Previous studies have shown that tolerance of and acclimation to hypoxia involve cardiopulmonary and hematological adaptations. We investigated blood respiratory properties during exposure to simulated high altitude (hypobaric hypoxia) and low temperature in unanesthetized resting pigeons (Columbia livia, mean mass 0.38 kg). A control group (C) and a group acclimated to 7 km above sea level (ASL) in a hypobaric chamber at 25 degrees C (HA group) were used. All were acutely exposed to altitudes through 9 km ASL at 5 or 25 degrees C. Arterial and mixed venous blood gas tensions and O2 and CO2 content during steady state decreased with increased altitude, whereas blood lactate increased in both groups at both temperatures. Acute high-altitude exposure did not affect hematocrit, hemoglobin concentrations, or O2 carrying capacity, but at any altitude these were all greater in HA than in C birds. At 5 degrees C blood pH increased with altitude in controls but remained unchanged in HA birds. At 25 degrees C in both groups mean intracellular pH did not change, averaging 6.97, whereas extracellular (venous) pH increased with altitude. At the highest altitudes tissue O2 extraction was virtually complete in both groups. Acclimation changed blood O2 and CO2 combining properties in ways likely to improve gas transport at high altitudes. The previously unreported shifts in blood respiratory and acid-base properties with acclimation indicate that innate extrapulmonary adaptations contribute to avian hypoxia tolerance.
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Dünnwald, Tobias, Roland Kienast, David Niederseer, and Martin Burtscher. "The Use of Pulse Oximetry in the Assessment of Acclimatization to High Altitude." Sensors 21, no. 4 (February 10, 2021): 1263. http://dx.doi.org/10.3390/s21041263.

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Background: Finger pulse oximeters are widely used to monitor physiological responses to high-altitude exposure, the progress of acclimatization, and/or the potential development of high-altitude related diseases. Although there is increasing evidence for its invaluable support at high altitude, some controversy remains, largely due to differences in individual preconditions, evaluation purposes, measurement methods, the use of different devices, and the lacking ability to interpret data correctly. Therefore, this review is aimed at providing information on the functioning of pulse oximeters, appropriate measurement methods and published time courses of pulse oximetry data (peripheral oxygen saturation, (SpO2) and heart rate (HR), recorded at rest and submaximal exercise during exposure to various altitudes. Results: The presented findings from the literature review confirm rather large variations of pulse oximetry measures (SpO2 and HR) during acute exposure and acclimatization to high altitude, related to the varying conditions between studies mentioned above. It turned out that particularly SpO2 levels decrease with acute altitude/hypoxia exposure and partly recover during acclimatization, with an opposite trend of HR. Moreover, the development of acute mountain sickness (AMS) was consistently associated with lower SpO2 values compared to individuals free from AMS. Conclusions: The use of finger pulse oximetry at high altitude is considered as a valuable tool in the evaluation of individual acclimatization to high altitude but also to monitor AMS progression and treatment efficacy.
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Дисертації з теми "Altitude exposure"

1

Baldwin, Chris. "THE EFFECT OF ALTITUDE EXPOSURE: VIA REBREATHING ON INTERVAL PERFORMANCE." Miami University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1304693881.

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2

Turner, Gareth. "Hypoxic exposure to optimise altitude training adaptations in elite endurance athletes." Thesis, University of Brighton, 2016. https://research.brighton.ac.uk/en/studentTheses/c252120d-e576-43d7-9627-214769c99ec1.

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The purpose of this thesis was to examine the physiological and haematological responses to altitude training and hypoxic exposures. Furthermore to investigate if additional hypoxic exposure around a “live high-train high” altitude training camp could maximise adaptations. Study one provided a detailed insight into the current practices and perceptions of elite British endurance athletes and coaches to altitude training. A survey found that the athletes and support staff’s concerns included maintaining training load at altitude, reducing the acclimatisation period, maximising haematological adaptations and when to compete on return to sea level. These challenges were prioritised and investigated further in the thesis. Confidence in the optimised carbon monoxide (CO) rebreathing method (oCOR-method) is paramount when assessing haematological adaptations. Study two found that Radiometer ABL80 hemoximeter provided a more valid and reliable determination of percent carboxyhaemoglobin (%HbCO) with a minimum of three replicate blood samples to obtain an error of ≤1%. Study three found that administering different boluses of CO produced significantly different haemoglobin mass (tHbmass) results (0.6 mL·kg−1 = 791 ± 149 g; 1.0 mL·kg−1 = 788 ± 149 g; and 1.4 mL·kg−1 = 776 ± 148 g). A bolus of 0.6 to 1.0 mL·kg−1 provided sufficient precision and safety to determine %HbCO with the ABL80 hemoximeter. Additional hypoxic exposures have been identified as a strategy to maintain altitude haematological adaptations gained from altitude training camps. Study four investigated the time course of erythropoietin (EPO) and inflammatory markers after acute (2 h passive rest) hypoxic exposures (FiO2: 0.135, 0.125, 0.115, and 0.209). [EPO] increased in all hypoxic conditions 2 h post-exposure, being maintained until 4 h post-exposure, however, the largest increase came from the FiO2: 0.115 condition increasing by ~50% (P < 0.001). There were no differences found between hypoxic exposures in IL-6 or TNFα. Study five investigated the effect of acute hypoxia as a priming tool, by measuring the effect of increased circulating EPO on endurance performance. A 10 min pre-loaded treadmill running time trial (TT10) was preceded by 2 h normobaric hypoxia (HYPO; FiO2: 0.115), hyperoxia (HYPER; FiO2: 0.395) or normoxia (CON; FiO2: 0.209) 3.5 h prior to the TT10. No differences (P = 0.082) were found in distance covered during TT10 (HYPO: 2726 ± 277 vs. CON: 2724 ± 279 vs. HYPER: 2742 ± 281 m). Study six monitored physiological and haematological variables of elite endurance runners completing four weeks of live high-training high (LHTH; ~2,300 m) altitude training (ALT) compared to a control group (CON). A hypoxic sensitivity test (HST) was completed pre (PRE) and post-altitude (POST-2), alongside a treadmill test and oCOR-method. From PRE to POST-2 a difference in average lactate threshold (LT) (6.1 ± 4.6% vs. 1.8 ± 4.5%) and lactate turnpoint (LTP) (5.4 ± 3.8% vs. 1.1 ± 3.2%) was found within ALT, but not CON. Mean V̇O2max increased by 2.7 ± 3.5% in ALT, and decreased by 3.3 ± 6.3% in the CON group (P = 0.042). Total Hbmass increased by 1.9 ± 2.9% and 0.1 ± 3.3% (P > 0.05) from PRE to POST-2 in the ALT and CON group, respectively. No changes were found in mean tHbmass post-LHTH; however, EPO was lower at POST-1. The HST revealed desaturation at rest and hypoxic ventilatory response at exercise predicted individual changes in tHbmass and hypoxic cardiac response at rest predicted changes in V̇O2max. The evidence reported supports the notion that additional hypoxic exposures around an altitude training camp can maximise physiological and haematological adaptation via a prior understanding of an athlete’s response to hypoxia and therefore the optimisation the athlete’s altitude training needs.
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Winterhalder, Ralph Martinelli Michele. "Muscle degenerative and regenerative changes with high altitude exposure in humans /." Bern, 1989. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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4

Babcock, Carmen J. "The effect of intermittent simulated altitude exposure via re-breathing on cycling performance." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1179856789.

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5

Boake, Elliott. "The evaluation of a mobile device to measure ataxia with high altitude exposure." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60197.

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To our knowledge, no study has used an assessment of ataxia and a finger-tapping task on a mobile device to monitor acclimatization to hypoxia. This research evaluated the utility of this tool in assessing human acclimatization to hypoxia while monitoring the development of acute mountain sickness (AMS). This study used a single-blinded repeated-measures randomized crossover design. Subjects experienced a familiarization trial at a simulated altitude of 2000m, a high altitude simulating 4200m and a sham condition simulating 250m. Measurements of AMS, pulse oxygen saturation and performance of the finger-tapping task were completed immediately prior to, and 5 minutes, 4 hours, and 12 hours following entrance to the chamber. Fifteen healthy male and female subjects were recruited form the Vancouver area. Subjects were between the ages of 19 and 25 years old. Subjects had not traveled to an altitude of 3000m or higher in the 3 months prior to testing. Subjects were excluded if they had any cardiovascular or pulmonary conditions. A repeated-measures ANOVA was performed to analyze if significant results were found for reaction time and accuracy of the finger-tapping task. Accuracy of the finger-tapping task worsened over the exposure to hypoxia, however, error rate and response time were not affected based on this simulated altitude alone. All other measures, including symptom questionnaires and pulse oxygen saturation suggest that these subjects had normal responses to altitude. Based on these findings, it appears that these finger-tapping tasks that focus on measures may be useful while monitoring acclimatization to hypoxia.
Education, Faculty of
Graduate
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6

Möller, Thomas [Verfasser]. "Measurement of the Radiation Exposure for High Altitude Flights in the Polar Region / Thomas Möller." Kiel : Universitätsbibliothek Kiel, 2013. http://d-nb.info/1045604003/34.

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7

Desilets, Darin Maurice. "Cosmogenic nuclides as a surface exposure dating tool: improved altitude/latitude scaling factors for production rates." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1125%5F1%5Fm.pdf&type=application/pdf.

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8

Hinckson, Erica A. "Effect of simulated altitude exposure on sea level performance a thesis submitted to Auckland University of Technology in fulfilment of the degree of Doctor of Philosophy, July 2004." Full thesis. Abstract, 2004.

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9

Nybäck, Linn. "Spirometry before high altitude exposure: a way to predict an individual risk of developing acute mountain sickness." Thesis, Mittuniversitetet, Institutionen för hälsovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22182.

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Wood, Matthew R. "Effects of altitude exposure combined with sea level training on sea level performance a thesis submitted to Auckland University of Technology for the degree of Master of Health Science, Faculty of Health Sciences, September 2003." Full thesis. Abstract, 2003. http://puka2.aut.ac.nz/ait/theses/WoodM.pdf.

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Книги з теми "Altitude exposure"

1

Bryson, Elizabeth P. Bibliography on altitude exposure. [S.l.]: [CFHT], 1995.

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2

Wilson, J. W. Radiation safety issues in high altitude commercial aircraft. [Washington, D.C: National Aeronautics and Space Administration, 1995.

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3

National Council on Radiation Protection and Measurements., ed. Radiation exposure and high altitude flight. Bethesda, Md: National Council on Radiation Protection and Measurements, 1995.

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4

Hematological changes in response to exposure to moderate altitudes. 1985.

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5

Actual and Perceived Cognitive Performance during Acute Altitude Exposure. Storming Media, 2001.

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6

Nussbaumer-Ochsner, Yvonne, and Konrad E. Bloch. Sleep at high altitude and during space travel. Edited by Sudhansu Chokroverty, Luigi Ferini-Strambi, and Christopher Kennard. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199682003.003.0054.

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This chapter summarizes data on sleep–wake disturbances in humans at high altitude and in space. High altitude exposure is associated with periodic breathing and a trend toward reduced slow-wave sleep and sleep efficiency in healthy individuals. Some subjects are affected by altitude-related illness (eg, acute and chronic mountain sickness, high-altitude cerebral and pulmonary edema). Several drugs are available to prevent and treat these conditions. Data about the effects of microgravity on sleep are limited and do not allow the drawing of firm conclusions. Microgravity and physical and psychological factors are responsible for sleep–wake disturbances during space travel. Space missions are associated with sleep restriction and disruption and circadian rhythm disturbances encouraging use of sleep medication. An unexplained and unexpected finding is the improvement in upper airway obstructive breathing events and snoring during space flight.
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Ellam, Rob. 8. Scratching the surface with cosmogenic isotopes. Oxford University Press, 2016. http://dx.doi.org/10.1093/actrade/9780198723622.003.0008.

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‘Scratching the surface with cosmogenic isotopes’ explains spallation—when a high energy cosmic ray particle removes several nucleons from an atom. Spallation produces 10Be from 16O in the atmosphere and rock surfaces, while spallation of silicon produces another cosmogenic isotope, 26Al. Cosmogenic isotope production is about four times greater at the poles than at the equator and is also greater at higher altitudes. To calculate a cosmogenic isotope exposure age, the latitude and altitude at which the sample was exposed needs to be known. Using ‘exposure’ and ‘burial’ methodologies, cosmogenic isotopes can be used to address various scientific problems such as recreating the seismic histories of tectonically active areas.
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1945-, Pandolf Kent B., Burr R. E, and United States. Dept. of the Army. Office of the Surgeon General., eds. Medical aspects of harsh environments. Falls Church, Va: Office of the Surgeon General, United States Army, 2001.

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9

Medical Aspects of Harsh Environments, Volume 1 (Textbooks of Military Medicine). Dept. of the Army, 2002.

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(Editor), Kent B. Pandoff, Robert E. Burr (Editor), and Walter Reed Army Medical Center Borden Institute (Producer), eds. Medical Aspects of Harsh Environments, Volume 2 (Textbooks of Military Medicine). Dept. of the Army, 2002.

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Частини книг з теми "Altitude exposure"

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Howald, H., H. Hoppeler, H. Ciaassen, S. Kayar, E. Kleinert, C. Schlegel, R. Winterhaider, et al. "Muscle Structure and Function after Exposure to High Altitude Hypoxia." In The Dynamic State of Muscle Fibers, edited by Dirk Pette, 629–38. Berlin, Boston: De Gruyter, 1990. http://dx.doi.org/10.1515/9783110884784-049.

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Sander, Mikael. "Does the Sympathetic Nervous System Adapt to Chronic Altitude Exposure?" In Advances in Experimental Medicine and Biology, 375–93. Boston, MA: Springer US, 2016. http://dx.doi.org/10.1007/978-1-4899-7678-9_25.

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Huch, R. "Chronic and Temporary Exposure to Altitude: Effect on Fertility and Pregnancy Outcome." In Gynecology and Obstetrics, 93–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70559-5_28.

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Radak, Zsolt, Zoltan Acs, Zoltan Bori, Albert W. Taylor, and Hu Yang. "The Effects of High-Altitude Exposure on Reactive Oxygen and Nitrogen Species." In Systems Biology of Free Radicals and Antioxidants, 407–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-30018-9_28.

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Deuber, H. J. "Drug Therapy of Patients with Coronary Heart Disease During Exposure to Moderate Altitude." In Travel Medicine, 461–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-73772-5_101.

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Dahai, Xue, Yang Fengxiang, and Denise Bee. "Modification of the Rabbit Carotid Body Type I Cell Mitochondria by High Altitude Exposure and the Effects of Dracocephalum Heterophyllum." In Advances in Experimental Medicine and Biology, 357–60. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2572-1_66.

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Beck, Peter. "Aircraft Crew Radiation Exposure in Aviation Altitudes During Quiet and Solar Storm Periods." In Astrophysics and Space Science Library, 241–67. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/1-4020-5446-7_22.

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"Chronic high-altitude exposure." In Pulmonary Circulation, 474–88. CRC Press, 2016. http://dx.doi.org/10.1201/9781315382753-53.

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Albert, Tyler, Erik R. Swenson, Andrew J. Pollard, Buddha Basnyat, and David R. Murdoch. "Diseases of high terrestrial altitudes." In Oxford Textbook of Medicine, edited by Jon G. Ayres, 1701–9. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0209.

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Анотація:
Ascent to altitudes above 2,500 m leads to exposure to hypobaric hypoxia. This affects performance on first arrival at high altitude and disturbs sleep, but physiological changes occur over time to defend arterial and tissue oxygenation and allow the individual to adjust. This process of acclimatization includes (1) an increase in the rate and depth of breathing; and (2) an increase in red cell mass, and in red cell 2,3-diphosphoglycerate. Acclimatization is no longer possible at extreme altitude (>5,800 m) and the exposed individual will gradually deteriorate. Altitude illness results from a failure to adjust to hypobaric hypoxia at altitude. Risk is increased by ascent to higher altitudes, by more rapid gain in altitude, and (in some people) genetic predisposition; the condition may be avoided in most cases by slow, graded ascent.
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"Metabolic Response of Lowlanders to High-Altitude Exposure: Malnutrition Versus the Effect of Hypoxia." In High Altitude, 591–621. CRC Press, 2001. http://dx.doi.org/10.3109/9780203908044-21.

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Тези доповідей конференцій з теми "Altitude exposure"

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Schwarz, Esther I., Tsogyal D. Latshang, Michael Furian, Deborah Flück, Sebastian Segitz, Séverine Müller-Mottet, Silvia Ulrich-Somaini, Konrad E. Bloch, and Malcolm Kohler. "Blood pressure response to altitude exposure in patients with COPD." In Annual Congress 2015. European Respiratory Society, 2015. http://dx.doi.org/10.1183/13993003.congress-2015.pa2309.

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Furian, Michael, Sara E. Hartmann, Lara Muralt, Mona Lichtblau, Patrick R. Bader, Jean M. Rawling, Silvia Ulrich, Marc J. Poulin, and Konrad E. Bloch. "Effect of repeated altitude exposure on nocturnal breathing disturbances in lowlanders." In ERS International Congress 2017 abstracts. European Respiratory Society, 2017. http://dx.doi.org/10.1183/1393003.congress-2017.pa2980.

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Makarov, A. F., and V. Yu Tkachuk. "ARTIFICIAL HYPOBIOSIS AS METHOD OF ACUTE ALTITUDE ILLNESS NEGATIVE IMPACT REDUCTION." In The 4th «OCCUPATION and HEALTH» International Youth Forum (OHIYF-2022). FSBSI «IRIOH», 2022. http://dx.doi.org/10.31089/978-5-6042929-6-9-2022-1-152-155.

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Introduction: While reaching ever new heights mankind met an altitude illness. A critical stage of altitude sickness, manifesting by loss of consciousness, convulsions, apnea and subsequent death, develops at above 7 km altitudes. Pilots, alpinists and extreme sportsmen are the main risk group. Acute oxygen starvation of body while significant hypobaric hypoxia is the main mechanism of altitude illness. It is proposed to reduce the level of metabolism (artificial hypobiosis) to prevent the negative impact of acute hypobaric hypoxia. The study goal to assess the efficiency of organism negative impact prevention with metabolic rate reduction while acute hypobaric hypoxia. Materials and methods: Syrian hamsters, 90–110 g weight were used in the study. 2 groups, 8 animals in each. Experimental group of animals had intramuscular injections of 1 ml 0.9% NaCl containing 1 g/kg Methyldop (CAS Number 555-30-6) in 0.3 ml/kg dimethyl sulfoxide (DMSO) suspension. Control group of animals had 1 ml 0.9% NaCl containing 0.3 ml/kg DMSO. 3 hours later animals had been placed in hypobaric chamber. 20 kPa under pressure was created, speed – 1.25 kPa/s. Continuous chamber air flow was made to avoid CO2 accumulation. Continuous visual observation carried out. Consciousness, posture maintenance time, convulsive seizures, agonal breathing, and apnea were registered. Results: Control group: since start of exposure the average animal posture maintenance time was 3 s (standard error (SE) – 4 s). First convulsion time – 20 s (SE – 8 s), second convulsion – 56 s (SE – 14 s), agonal breath type start (6 animals) – 52 s (SE – 20 s), apnea – 1 min 54 s (SE – 1 min 8 s). It was consciousness absence in all animal. Experimental group: none of registered parameters were observed. All animals had consciousness, actively restored their position, while chamber was tilted. The exposure lasted for 20 minutes. Conclusions: Metabolic rate reduction has high efficiency for organism negative impact prevention while acute hypobaric hypoxia.
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Stoewhas, Anne-Christin, Tsogyal D. Latshang, Christian M. Lo Cascio, Katrin Stadelmann, Noemi Tesler, Reto Huber, Peter Achermann, Konrad E. Bloch, and Malcolm Kohler. "Effects Of Acute Exposure To Moderate Altitude On Vascular Function And Metabolism." In American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California. American Thoracic Society, 2012. http://dx.doi.org/10.1164/ajrccm-conference.2012.185.1_meetingabstracts.a6383.

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Meszaros, Martina, Tsogayl D. Latshang, Sayaka Aeschbacher, Fabienne Huber, Deborah Flueck, Mona Lichtblau, Stefanie Ulrich, et al. "Effect of oxygen on blood pressure response to altitude exposure in COPD." In ERS International Congress 2021 abstracts. European Respiratory Society, 2021. http://dx.doi.org/10.1183/13993003.congress-2021.pa406.

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Williamson, James, Thomas Quatieri, Adam Lammert, Katherine Mitchell, Katherine Finkelstein, Nicole Ekon, Caitlin Dillon, Robert Kenefick, and Kristin Heaton. "The Effect of Exposure to High Altitude and Heat on Speech Articulatory Coordination." In Interspeech 2018. ISCA: ISCA, 2018. http://dx.doi.org/10.21437/interspeech.2018-2372.

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José, Méndez. "1143 Health evaluation for occupational high-altitude exposure: results from a chilean copper mine during 2016." In 32nd Triennial Congress of the International Commission on Occupational Health (ICOH), Dublin, Ireland, 29th April to 4th May 2018. BMJ Publishing Group Ltd, 2018. http://dx.doi.org/10.1136/oemed-2018-icohabstracts.709.

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Wang, Haiying, and Songtao Hu. "Effect of Moderate Altitude Exposure on Human Thermal Physiological Parameters and Heat Losses in different activities." In 2016 International Forum on Energy, Environment and Sustainable Development. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ifeesd-16.2016.3.

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Schneider, S. R., M. Lichtblau, M. Furian, L. Mayer, J. Müller, S. Saxer, K. Bloch, and S. Ulrich. "Cardiorespiratory adaptation whilst breathing normobaric hypoxia vs. short-term exposure to altitude in patients with pulmonary hypertension." In ERS International Congress 2022 abstracts. European Respiratory Society, 2022. http://dx.doi.org/10.1183/13993003.congress-2022.3647.

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Lichtblau, Mona, Patrick Raphael Bader, Michael Furian, Lara Muralt, Sara E. Hartmann, Jean M. Rawling, Marc J. Poulin, Konrad E. Bloch, and Silvia Ulrich. "Effect of acute and subacute exposure and reexposure to high altitude on pulmonary artery pressure in healthy lowlanders." In ERS International Congress 2017 abstracts. European Respiratory Society, 2017. http://dx.doi.org/10.1183/1393003.congress-2017.pa2397.

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Звіти організацій з теми "Altitude exposure"

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Mader, Thomas, and Christopher L. Blanton. Refractive Changes during Prolonged Exposure to Altitude Following Refractive Surgery. Fort Belvoir, VA: Defense Technical Information Center, October 1994. http://dx.doi.org/10.21236/ada290263.

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Pilmanis, Andrew A., James T. Webb, and Ulf Balldin. The Impact of High Levels of Nitrogen in the Breathing Gas and In-Flight Denitrogenation on the Risk of Decompression Sickness (DCS) During Simulated Altitude Exposure. Fort Belvoir, VA: Defense Technical Information Center, April 2005. http://dx.doi.org/10.21236/ada435103.

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Beidleman, Beth A., Stephen R. Muza, Charles S. Fulco, Allen Cymerman, and Daniel T. Ditzler. Effects of Intermittent Altitude Exposures on Acclimatization of 4,300 M. Fort Belvoir, VA: Defense Technical Information Center, November 2001. http://dx.doi.org/10.21236/ada398658.

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Beidleman, B. A., S. R. Muza, C. S. Fulco, A. Cymerman, M. N. Sawka, S. F. Lewis, and G. S. Skrinar. Seven Days of Intermittent Altitude Exposures Improve Endurance Performance at 4300 M. Fort Belvoir, VA: Defense Technical Information Center, April 2006. http://dx.doi.org/10.21236/ada449833.

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