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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 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. Cases have also been reported between 1,500–2,500 metres or 4,900–8,200 feet in people who ...
Very high altitude = 3,500–5,500 metres (11,500–18,000 ft) Extreme altitude = above 5,500 metres (18,000 ft) Travel to each of these altitude regions can lead to medical problems, from the mild symptoms of acute mountain sickness to the potentially fatal high-altitude pulmonary edema and high-altitude cerebral edema .
This window can be extended to 36 hours for ascent to altitude and 48 hours for prolonged exposure to altitude following diving. [10] An alternative diagnosis should be suspected if severe symptoms begin more than six hours following decompression without an altitude exposure or if any symptom occurs more than 24 hours after surfacing. [78]
Researchers have associated aerotoxic syndrome with exposure to substances such as engine oil and hydraulic fluid. [ 2 ] [ 3 ] Although researchers have identified correlations between the aircraft occupational environment and symptoms of aerotoxic syndrome, [ 4 ] this condition is not an established medical diagnosis [ 5 ] [ 6 ] because the ...
Chronic mountain sickness (CMS) is a disease in which the proportion of blood volume that is occupied by red blood cells increases (polycythaemia) and there is an abnormally low level of oxygen in the blood . CMS typically develops after extended time living at high altitude (over 2,500 metres (8,200 ft)).
Altitude sickness – Medical condition due to rapid exposure to low oxygen at high altitude; Death zone – Altitudes above about 8,000 m (26,000 ft) Decompression (altitude) – Reduction in ambient pressure due to ascent above sea level; Decompression illness – Disorders arising from ambient pressure reduction; Effects of high altitude on ...
Treatment Table 5a: Used for treatment of gas embolism when oxygen can be used and symptoms are relieved within 15 minutes at 165 fsw (50 msw). [13] Treatment Table 6: Used for treatment of pain-only decompression sickness when oxygen can be used and symptoms are not relieved within 10 minutes at 60 fsw (18 msw). [13]