Questions tagged [hypoxia]

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Could the cerebral hypoxia caused by voluntarily hyperventilating for an hour (“breathwork”) cause brain damage?

TL;DR hyperventilating for 60 minutes for psychedelic/meditative/therapeutic effect: is this dangerous? Hyperventilation can lead to cerebral hypoxia, as hypocapnia (reduced CO2 in blood) causes ...
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Effects of n95 respirator in-flight - from the point of view of ambient oxygen level

I have a generic question about the usage of n95/99 or higher filtration respirators in high-altitude flights. With current pandemic situation we see many government/airlines are enforcing the use of ...
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What oxygen saturation level causes fainting?

I am talking about breath hold induced hypoxic state. Basically at what point during such an exercise would you expect the risk of fainting to be significant or can it happen at any saturation level? ...