purpose this study was performed to determine the possible causes and mechanisms of fatalities among iranian mountaineers during climbing. methods by contacting several sources, deceased mountaineers were identified. data about the causes and mechanism of death was retrospectively obtained using a standard questionnaire for each case. results a total of 29 deaths were identified from march 2006...

Hypoxia is inconsequential for physiologically fit persons below an effective altitude of 2640 metres. At higher altitudes, the adaptation is brought about by four main factors, viz., hyperventilation, increased diffusion of oxygen across alveolar membrane, erythrocythemia and maintenance of body hydration. Carbon dioxide sensitivity is markedly elevated at high altitude, both in sojourners and...

At any point 1-5 days following ascent to altitudes ≥2500 m, individuals are at risk of developing one of three forms of acute altitude illness: acute mountain sickness, a syndrome of nonspecific symptoms including headache, lassitude, dizziness and nausea; high-altitude cerebral oedema, a potentially fatal illness characterised by ataxia, decreased consciousness and characteristic changes on m...

Anesthesia at high altitude is a challenging task for all anesthesiologists. The high-altitude intensivists are challenged by the human organism in a hypoxic environment, and the true research potentials presented by high altitude, where thebody is subjected to an essentially isolatedhypoxic challenge, are just beginning to be realized. One of the problems when talking about high altitude is th...

A population of molecular clouds with a significantly greater scale height than that of Giant Molecular Clouds has been identified by examining maps of the latitude distribution of the CO(1 − 0) emission in the first quadrant of the Galaxy. These clouds are found by identifying emission more than 2.6 times the scale-height away from the galactic midplane (centroid of CO emission) at the tangent...

This review focuses on the epidemiology, clinical description, pathophysiology, treatment, and prevention of high altitude cerebral edema (HACE). HACE is an uncommon and sometimes fatal complication of traveling too high, too fast to high altitudes. HACE is distinguished by disturbances of consciousness that may progress to deep coma, psychiatric changes of varying degree, confusion, and ataxia...

A comprehensive simulation model is established to predict the trajectory of a high-altitude zero-pressure balloon flight system with no parachute that required carry load floating at designated altitude for several hours or less. series mathematical models, including thermal dynamic, atmospheric, earth, wind, geometry, and exhaust are developed system. Based on these uncertainties launch param...