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Altitude illness

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https://www.readbyqxmd.com/read/29784570/research-gaps-in-wilderness-medicine
#1
Daniel Tritz, Kody Dormire, Travis Brachtenbach, Joshua Gordon, Donald Sanders, David Gearheart, Julia Crawford, Matt Vassar
INTRODUCTION: Wilderness medicine involves the treatment of individuals in remote, austere environments. Given the high potential for injuries as well as the unique treatment modalities required in wilderness medicine, evidence-based clinical practice guidelines are necessary to provide optimal care. In this study, we identify evidence gaps from low-quality recommendations in wilderness medicine clinical practice guidelines and identify new/ongoing research addressing them. METHODS: We included relevant clinical practice guidelines from the Wilderness Medical Society and obtained all 1C or 2C level recommendations...
May 18, 2018: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/29763853/text-mining-and-network-analysis-to-find-functional-associations-of-genes-in-high-altitude-diseases
#2
Balu Bhasuran, Devika Subramanian, Jeyakumar Natarajan
BACKGROUND AND OBJECTIVES: Travel to elevations above 2500 m is associated with the risk of developing one or more forms of acute altitude illness such as acute mountain sickness (AMS), high altitude cerebral edema (HACE) or high altitude pulmonary edema (HAPE). Our work aims to identify the functional association of genes involved in high altitude diseases. METHOD: In this work we identified the gene networks responsible for high altitude diseases by using the principle of gene co-occurrence statistics from literature and network analysis...
May 2, 2018: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/29745294/prevalence-of-chronic-obstructive-pulmonary-disease-county-level-risk-factors-based-on-the-social-ecological-model
#3
J T McDaniel
AIMS: Chronic obstructive pulmonary disease (COPD) was the third leading cause of death among Americans in 2014. Multiple factors, ranging from proximal (i.e. biological characteristics and behaviors) to distal (i.e. environmental characteristics and policies), have been shown to predict COPD outcomes. The Social Ecological Model (SEM), which specifies that five levels of influence (i.e. intrapersonal, interpersonal, institutional, community, and public policy factors) are implicated in the development of ill health, has not been used in epidemiological studies of COPD prevalence...
May 1, 2018: Perspectives in Public Health
https://www.readbyqxmd.com/read/29698652/diagnosis-and-prophylaxis-for-high-altitude-acclimatization-adherence-to-molecular-rationale-to-evade-high-altitude-illnesses
#4
REVIEW
Subhojit Paul, Anamika Gangwar, Kalpana Bhargava, Yasmin Ahmad
Lack of zero side-effect, prescription-less prophylactics and diagnostic markers of acclimatization status lead to many suffering from high altitude illnesses. Although not fully translated to the clinical setting, many strategies and interventions are being developed that are aimed at providing an objective and tangible answer regarding the acclimatization status of an individual as well as zero side-effect prophylaxis that is cost-effective and does not require medical supervision. This short review brings together the twin problems associated with high-altitude acclimatization, i...
April 23, 2018: Life Sciences
https://www.readbyqxmd.com/read/29606672/critical-care-performance-in-a-simulated-military-aircraft-cabin-environment
#5
Margaret M McNeill
BACKGROUND: Critical Care Air Transport Teams care for 5% to 10% of injured patients who are transported on military aircraft to definitive treatment facilities. Little is known about how the aeromedical evacuation environment affects care. OBJECTIVES: To determine the effects of 2 stressors of flight, altitude-induced hypoxia and aircraft noise, and to examine the contributions of fatigue and clinical experience on cognitive and physiological performance of the Critical Care Air Transport Team...
April 2018: Critical Care Nurse
https://www.readbyqxmd.com/read/29571702/competing-trends-of-ros-and-rns-mediated-protein-modifications-during-hypoxia-as-an-alternate-mechanism-of-no-benefits
#6
Anamika Gangwar, Subhojit Paul, Yasmin Ahmad, Kalpana Bhargava
Hypoxia, especially altitude associated hypoxia is known to cause severe physiological alterations and life-threatening conditions. Impaired redox balance along with oxidative stress, protein carbonylation and instigation of apoptotic events are common sub-cellular events that follow the hypoxic insult. The role of nitric oxide (NO) is very dynamic and versatile in preventing the ill effects of hypoxia vis-a-vis reacting with oxidative species and causing protein nitrosylation. Although several mechanisms of NO-mediated cytoprotection are known during hypoxic insult, limited evidences are available to support the relationship between two downstream events of oxidative stress, protein carbonylation (caused by carbonyl; CO radical) and protein nitrosylation/nitration (caused by NO/peroxynitrite; ONOO radical)...
March 20, 2018: Biochimie
https://www.readbyqxmd.com/read/29529715/interventions-for-preventing-high-altitude-illness-part-2-less-commonly-used-drugs
#7
REVIEW
Alejandro Gonzalez Garay, Daniel Molano Franco, Víctor H Nieto Estrada, Arturo J Martí-Carvajal, Ingrid Arevalo-Rodriguez
BACKGROUND: High altitude illness (HAI) is a term used to describe a group of mainly cerebral and pulmonary syndromes that can occur during travel to elevations above 2500 metres (˜ 8200 feet). Acute mountain sickness (AMS), high altitude cerebral oedema (HACE) and high altitude pulmonary oedema (HAPE) are reported as potential medical problems associated with high altitude ascent. In this second review, in a series of three about preventive strategies for HAI, we assessed the effectiveness of five of the less commonly used classes of pharmacological interventions...
March 12, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29470103/an-approach-to-children-with-pulmonary-edema-at-high-altitude
#8
Deborah R Liptzin, Steven H Abman, Ann Giesenhagen, D Dunbar Ivy
Liptzin, Deborah R., Steven H. Abman, Ann Giesenhagen, and D. Dunbar Ivy. An approach to children with pulmonary edema at high altitude. High Alt Med Biol. 19:91-98, 2018. INTRODUCTION: Diagnosis of high-altitude illness can be more challenging in children, especially those who are preverbal. Families often travel to high elevations for family vacations, either for skiing, hiking, and/or camping. They may present to their primary care providers looking for anticipatory guidance before travel or may follow-up after developing high-altitude illness...
March 2018: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29431548/impact-of-energy-availability-health-and-sex-on-hemoglobin-mass-responses-following-lhth-altitude-training-in-elite-female-and-male-distance-athletes
#9
Ida A Heikura, Louise M Burke, Dan Bergland, Arja L T Uusitalo, Antti A Mero, Trent Stellingwerff
BACKGROUND: We investigated the effects of sex, energy availability (EA), and health status on the change in hemoglobin mass (ΔHbmass) in elite endurance athletes over ~3 to 4 weeks of Live-High/Train-High altitude training (Flagstaff, AZ, 2135m; n=27 females; n=21 males; 27% 2016 Olympians). METHODS: Pre- and post-camp Hbmass (optimized CO re-breathing method) and iron status were measured, EA was estimated via food and training logs and Low Energy Availability in Females Questionnaire (LEAF-Q) and a general injury/illness questionnaire was completed...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29386711/endothelial-markers-in-high-altitude-induced-systemic-hypertension-hash-at-moderate-high-altitude
#10
Uday Yanamandra, S P Singh, Sushma Yanamandra, Deepak Mulajkar, R S Grewal, Shashibala Singh, M Z Ashraf, Prasanna Reddy, Velu Nair
Background: Chronic intermittent hypoxia is known to induce systemic arterial hypertension whereas chronic hypoxia causes pulmonary arterial hypertension. High altitude (HA) induced systemic hypertension (HASH) in previously normotensive lowlanders following acclimatisation and prolonged stay at moderate HA is a commonly encountered medical problem. HASH has been attributed to increased sympathetic discharge. Endothelial dysfunction (ED) is implicated in hypertension in the plains hence this study was conducted in HA...
October 2017: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/29366758/transcriptomic-profiling-reveals-gene-expression-kinetics-in-patients-with-hypoxia-and-high-altitude-pulmonary-edema
#11
Li Yuhong, Wuren Tana, Bai Zhengzhong, Tang Feng, Ga Qin, Yang Yingzhong, Guan Wei, Wang Yaping, Charles Langelier, Matthew T Rondina, Ri-Li Ge
OBJECTIVE: High altitude pulmonary edema (HAPE) is a life threatening condition occurring in otherwise healthy individuals who rapidly ascend to high altitude. However, the molecular mechanisms of its pathophysiology are not well understood. The objective of this study is to evaluate differential gene expression in patients with HAPE during acute illness and subsequent recovery. METHODS: Twenty-one individuals who ascended to an altitude of 3780 m were studied, including 12 patients who developed HAPE and 9 matched controls without HAPE...
April 20, 2018: Gene
https://www.readbyqxmd.com/read/29341860/risk-management-of-free-radicals-involved-in-air-travel-syndromes-by-antioxidants
#12
Jeum-Nam Kim, Byung-Mu Lee
Frequent air travelers and airplane pilots may develop various types of illnesses. The environmental risk factors associated with air travel syndromes (ATS) or air travel-related adverse health outcomes raised concerns and need to be assessed in the context of risk management and public health. Accordingly, the aim of the present review was to determine ATS, risk factors, and mechanisms underlying ATS using scientific data and information obtained from Medline, Toxline, and regulatory agencies. Additional information was also extracted from websites of organizations, such as the International Air Transport Association (IATA), International Association for Medical Assistance to Travelers (IAMAT), and International Civil Aviation Organization (ICAO)...
January 17, 2018: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/29334635/the-effect-of-altitude-and-climate-on-the-suicide-rates-in-turkey
#13
Mahmut Asirdizer, Erhan Kartal, Yasin Etli, Ertugrul Tatlisumak, Orhan Gumus, Yavuz Hekimoglu, Sıddık Keskin
Suicide is one of the most important public health problems. There was an association between suicide and several factors such as psychiatric diseases and psychological characteristics, somatic illness, cultural, socioeconomic, familial, occupational and individual risk factors. Also, high altitude and climatic factors including high temperature, cloudiness, more sunshine and low rainfalls were defined as some of these risk factors in the literature. In this study, we aimed to investigate correlation between suicide rates and altitudes of all cities in Turkey and between suicide rates and climatic factors including Rainfall Activity Index, Winter Mean Temperatures, Summer Mean Temperatures and Temperature Difference between January and July previously defined by several authors in the broad series in Turkey...
February 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29332784/air-transport-of-a-patient-with-impending-cerebral-herniation-from-tension-pneumocephalus
#14
Etzer Augustin, Michael Karsy, Jim Bryan, Jian Guan, Richard H Schmidt
Tension pneumocephalus is a rare but dangerous complication of craniotomy, sinus surgery, and traumatic cranial injury. Compared with simple pneumocephalus, which often resolves spontaneously over the course of a few days, tension pneumocephalus tends to increase with ongoing cerebrospinal fluid leak and requires immediate neurosurgical treatment to prevent cerebral herniation. Air transport of patients with tension pneumocephalus for neurosurgical care entails a risk of neurologic worsening because of changes in ambient air pressure with altitude and cabin pressurization...
January 2018: Air Medical Journal
https://www.readbyqxmd.com/read/29296771/red-blood-cells-in-hemorrhagic-shock-a-critical-role-for-glutaminolysis-in-fueling-alanine-transamination-in-rats
#15
Julie A Reisz, Anne L Slaughter, Rachel Culp-Hill, Ernest E Moore, Christopher C Silliman, Miguel Fragoso, Erik D Peltz, Kirk C Hansen, Anirban Banerjee, Angelo D'Alessandro
Red blood cells (RBCs) are the most abundant host cell in the human body and play a critical role in oxygen transport and systemic metabolic homeostasis. Hypoxic metabolic reprogramming of RBCs in response to high-altitude hypoxia or anaerobic storage in the blood bank has been extensively described. However, little is known about the RBC metabolism following hemorrhagic shock (HS), the most common preventable cause of death in trauma, the global leading cause of total life-years lost. Metabolomics analyses were performed through ultra-high pressure liquid chromatography-mass spectrometry on RBCs from Sprague-Dawley rats undergoing HS (mean arterial pressure [MAP], <30 mm Hg) in comparison with sham rats (MAP, >80 mm Hg)...
July 25, 2017: Blood Advances
https://www.readbyqxmd.com/read/29202898/isolated-psychosis-during-exposure-to-very-high-and-extreme-altitude-characterisation-of-a-new-medical-entity
#16
Katharina Hüfner, Hermann Brugger, Eva Kuster, Franziska Dünsser, Agnieszka E Stawinoga, Rachel Turner, Iztok Tomazin, Barbara Sperner-Unterweger
BACKGROUND: Psychotic episodes during exposure to very high or extreme altitude have been frequently reported in mountain literature, but not systematically analysed and acknowledged as a distinct clinical entity. METHODS: Episodes reported above 3500 m altitude with possible psychosis were collected from the lay literature and provide the basis for this observational study. Dimensional criteria of the Diagnostic and Statistical Manual of Mental Disorders were used for psychosis, and the Lake Louise Scoring criteria for acute mountain sickness and high-altitude cerebral oedema (HACE)...
December 5, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/29183280/using-a-monitoring-and-evaluation-framework-to-improve-study-efficiency-and-quality-during-a-prospective-cohort-study-in-infants-receiving-rotavirus-vaccination-in-el-alto-bolivia-the-infant-nutrition-inflammation-and-diarrheal-illness-nidi-study
#17
Anna M Aceituno, Kaitlyn K Stanhope, Paulina A Rebolledo, Rachel M Burke, Rita Revollo, Volga Iñiguez, Parminder S Suchdev, Juan S Leon
BACKGROUND: Implementing rigorous epidemiologic studies in low-resource settings involves challenges in participant recruitment and follow-up (e.g., mobile populations, distrust), biological sample collection (e.g., cold-chain, laboratory equipment scarcity) and data collection (e.g., literacy, staff training, and infrastructure). This article describes the use of a monitoring and evaluation (M&E) framework to improve study efficiency and quality during participant engagement, and biological sample and data collection in a longitudinal cohort study of Bolivian infants...
November 28, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29177389/-between-the-acclimatization-to-high-altitude-the-medical-anthropology-and-the-civilizing-utopia-mapping-of-the-evolution-of-thought-of-carlos-monge-medrano-on-the-health-illness-process-of-andean-populations
#18
Juan P Murillo
The main objective of this study is to describe how the ideas of Carlos Monge respect to high altitude sickness developed and how these were being deployed in the framework of the discussions on the living conditions of indigenous populations in the period 1928-1963. I postulate that the form how the Monge's paradigm was proposed, the tensions produced by various alternative movements and the way these contradictions were resolved were central, both for the subsequent development of different scientific disciplines and for their different institutional expressions in Peru...
April 2017: Revista Peruana de Medicina Experimental y Salud Pública
https://www.readbyqxmd.com/read/29157337/simulated-high-altitude-helium-oxygen-diving
#19
Lu Shi, Yan-Meng Zhang, Katsuura Tetsuo, Zhong-Yuan Shi, Yi-Qun Fang, Petar J Denoble, Yang-Yang Li
BACKGROUND: Experience with commercial heliox diving at high altitude is limited. The purpose of this study was to evaluate the effects of acute high-altitude exposure on fitness to dive and the safety of decompression after heliox diving while using U.S. Navy heliox decompression tables with Cross correction. METHOD: Four professional male divers were consecutively decompressed in a hypo- and hyperbaric chamber to altitudes of 3000 m (9842.5 ft), 4000 m (13,123...
December 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29095325/charcot-marie-tooth-disease-1x-simulating-paraparetic-guillain-barre-syndrome
#20
Dimitrios Parissis, Panagiotis Ioannidis, Georgios Papadopoulos, Dimitrios Karacostas
X-linked Charcot-Marie-Tooth disease (CMT 1X) is the second most common form of inherited demyelinating neuropathy. It is established that patients suffering from CMT 1X can have episodes of hemiparesis, paraparesis, quadriparesis, ataxia, aphasia, and dysarthria, which can be fully reversible, and 'trigger' factors for these episodes are usually febrile illness, high altitudes, hyperventilation, and physical activity. We describe a 22-year-old patient with a history of viral infection and sleep deprivation who presented to our department because of acute difficulty in walking and neurophysiological findings suggesting Guillain-Barre syndrome...
November 2017: Neurologist
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