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9 votes
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What's the typical concentration of medical oxygen?

Medical oxygen in liquid or compressed cylinders is typically >99% O2, but it is not typically administered at full strength. Instead, patients inspire a mixture of O2 and room air. Oxygen ...
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7 votes

Does the administration of oxygen to ischaemic patients improve outcome?

A large study of ~8000 patients suggests there is no real benefit to prophylactic oxygen supplementation after acute stroke (Roffe et al., 2017). American Heart Association/American Stroke ...
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4 votes

Can CPAP devices connected with oxygen sources be used as ventilators?

The software is very different. And the capabilities of the machine. The monitoring parameters within Ventilators are much more sensitive to pressure and volume than CPAP or BIPAP machines. Below are ...
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2 votes

Can CPAP devices connected with oxygen sources be used as ventilators?

The American Academy of Sleep Medicine (AASM) is correct in what they are saying when they said that It is possible that using CPAP could increase the risk of spreading the virus to others around you....
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2 votes

Can CPAP devices connected with oxygen sources be used as ventilators?

The essence of protection is a physical barrier against air borne virus droplets splashing against your mucus membranes (eyes, nose, mouth), and against virus from being breathed in. A CPAP machine ...
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2 votes

Does oxygen supplementation in case of pneumonia cause effects other than possibly preventing hypoxemia?

Hyperoxygenation causes vasoconstriction and increased systemic vascular resistance. This can be good in some circumstances and bad in others. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3672526/ ...
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2 votes

Are there no threats and only benefits for using hyperbaric oxygen therapy?

While hyperbaric oxygen therapy does have many benefits, there are potential issues. According to John Hopkins University Hyperbaric oxygen therapy can lead to lung damage, fluid buildup in the ears ...
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1 vote

Do oxygen and carbon dioxide move with Brownian motion? And, if so, do they get trapped by N95 masks?

From what I can tell, yes, both oxygen and carbon dioxide gas particles will follow brownian dynamics as they move through the air on both sides of an N95 mask. And, yes, studies (on people wearing ...
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1 vote
Accepted

The scientific evidence of '4-7-8' breathing trick to induce sleep

There is no evidence: "Despite a potential bit of miscommunication about the technique's effect on insomnia, there’s one thing I can be certain about – there doesn’t appear to be any reliable ...
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