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Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
Decompression sickness (DCS; also called divers' disease, the bends, aerobullosis, and caisson disease) is a medical condition caused by dissolved gases emerging from solution as bubbles inside the body tissues during decompression.
Down syndrome is one such syndrome. In this chromosomal abnormality, several features combine to make the presence of obstructive sleep apnea more likely. The specific features of Down syndrome that predispose to obstructive sleep apnea include relatively low muscle tone, narrow nasopharynx, and large tongue. Obesity and enlarged tonsils and ...
Natural gas prices are down nearly 40% year to date amid a glut in supply and a milder-than-expected winter. But analysts see an upside for the commodity going into the end of the year — in part ...
Rising natural gas production in the United States could be the life preserver that the floundering global shipping industry needs. Due to the Great Recession, shippers are suffering from ...
Since bumping up against support at 2.75 in mid-September, liquified natural gas price have jumped 18 percent, hitting a high above $3.20 for the first time since February. Prompting this is news ...
Helium may be added to reduce the amount of nitrogen and oxygen in the gas mixture when diving deeper, to reduce the effects of narcosis and to avoid the risk of oxygen toxicity. This is complicated at depths beyond about 150 metres (500 ft), because a helium–oxygen mixture then causes high pressure nervous syndrome. [1]
The second is OHS primarily due to "sleep hypoventilation syndrome"; this requires a rise of CO 2 levels by 10 mmHg (1.3 kPa) after sleep compared to awake measurements and overnight drops in oxygen levels without simultaneous apnea or hypopnea. [4] [11] Overall, 90% of all people with OHS fall into the first category, and 10% in the second. [5]