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Altitude sickness, the mildest form being acute mountain sickness (AMS), is a harmful effect of high altitude, caused by rapid exposure to low amounts of oxygen at high elevation. [ 1 ] [ 2 ] [ 3 ] People's bodies can respond to high altitude in different ways.
High altitude causes decreased blood flow to the placenta, even in acclimatized women, which interferes with fetal growth. [28] Consequently, children born at high-altitudes are found to be born shorter on average than children born at sea level. [29]
By contrast, the women of long-resident, high-altitude populations are known to give birth to heavier-weight infants than women of the lowland. This is particularly true among Tibetan babies, whose average birth weight is 294–650g (~470) g heavier than the surrounding Chinese population , and their blood-oxygen level is considerably higher.
High-altitude pulmonary edema (HAPE) is a life-threatening form of non-cardiogenic pulmonary edema that occurs in otherwise healthy people at altitudes typically above 2,500 meters (8,200 ft). [2] HAPE is a severe presentation of altitude sickness .
Atmospheric pressure decreases with altitude while the O 2 fraction remains constant to about 85 km (53 mi), so PO 2 decreases with altitude as well. It is about half of its sea level value at 5,500 m (18,000 ft), the altitude of the Mount Everest base camp , and less than a third at 8,849 m (29,032 ft), the summit of Mount Everest. [ 8 ]
It is initially elevated in lowlanders who travel to high altitude, but reduces significantly over time as people acclimatize. [1] [2] In biological anthropology, HVR also refers to human adaptation to environmental stresses resulting from high altitude. [3] In mammals, HVR invokes several physiological mechanisms.
[113] [114] The efficacy of acetaminophen by itself in children with fevers has been questioned. [115] Ibuprofen is also superior to aspirin in children with fevers. [116] Additionally, aspirin is not recommended in children and young adults (those under the age of 16 or 19 depending on the country) due to the risk of Reye's syndrome. [117]
Febrile seizures are due to fevers, [12] usually those greater than 38 °C (100.4 °F). [16] The cause of the fevers is often a viral illness. [1] The likelihood of a febrile seizure is related to how high the temperature reaches. [1] [6] Some feel that the rate of increase is not important [1] while others feel the rate of increase is a risk ...