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– Muktita Suhartono, at Tham Luang Cave
Why a 15% oxygen level worries rescuers
On Friday, a Thai Navy commander SEAL said that the level of water was high. oxygen in the cave of the boys was about 15%. . This is of concern because levels below 16% can cause depletion of oxygen, a condition known as hypoxia.
Under normal conditions, people breathe about 21% oxygen, 78% nitrogen, and 1% argon. carbon dioxide. When the mix changes, humans can experience a range of health effects, subtle and other.
The US Federal Aviation Administration reports that hypoxia can cause headaches, nausea, drowsiness, rapid breathing, slurred speech. among other problems. It can also result in disability or, in extreme cases, death.
Hypoxia can be a concern in high altitude regions, or when an airplane loses atmospheric pressure.
The air in the caves tends to be good Dinko Novosel, president of the European Cave Rescue Association, said that the concentration of oxygen in the cave of Tham Luang was 15% or less. network would be "really problematic" for anyone trapped inside. It would allow them to survive, but would make even basic activities difficult, he said.
Raymond Cheung, a professor of neurology at the University of Hong Kong, said the health effects would depend on a series of factors. Assuming that the 12 trapped boys and their trainer are in good health and do not exercise, "because they are near sea level and the pressure is normal, then they should be well, "says Professor Cheung
. According to him, activity in an environment so low in oxygen could cause serious problems, especially for anyone with pre-existing heart or lung problems.
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