Currently, mainly due to the lack of subjects willing to be researched in extreme conditions, but also the lack of working conditions, specialized knowledge, information, publications in the field are quite few, most of them being from American literature, the USA. being one of the countries with a tradition in mountaineering, nature offering enough possibilities for practicing this sport. For this reason, I tried to contribute to the completion of current knowledge in this field. Due to the increase in the number of people going to altitude, it is necessary that the specialists who can offer advice or treatment be as well trained as possible, preventing the occurrence of seasickness as much as possible altitude: acute mountain sickness - AMR, high-altitude pulmonary edema - EPMA and high-altitude cerebral edema - ECMA, which are caused by reduced blood oxygen levels. Prevention can be done with specific drugs (Dexamethasone, Ibuprofen) and by descending to a lower altitude. These diseases are very rare below 2.500 m, and from 3.000 m up, they occur in 75% of those who are not acclimatized, they can appear even after 24 - 48 hours, the descent having an important role in their involution, the return can last between 2 - 5 days.
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