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Biotech / Medical : Coronavirus - Covid 19 Information Sharing Forum -- Ignore unavailable to you. Want to Upgrade?

To: Bull RidaH who wrote (861)	11/11/2020 11:12:11 AM
From: TimF	1 Recommendation Recommended By Stock Puppy Read Replies (2) \| Respond to of 5956

Those masks are fairly thin a full of holes (which could be an argument that they are not very effective, but not so much that they drop oxygen levels too much), the demonstration in the video, is at best one test with one person and one device, and could be fraudulent. But you know I don't really think its is intentional fraud, or that the device is miscalculated. There is a bigger simpler problem. The sensor would measure the oxygen he exhales. That is gong to be lower in oxygen then what you inhale. Its typically about 16 percent oxygen (which is enough to support people BTW, plenty of people live with lower partial pressures then the equivalent of 16% at low altitude, and also its what people breathe in with mouth to mouth resuscitation). In any case 17.5% oxygen at sea level pressures doesn't cause brain damage. People live with less oxygen (not a lower percentage just thinner air) in the mountains 24/7/365 (rather then a few minutes to a few hours like people wear masks) without brain damage. People who aren't genetically adapted to high altitude also live in such places without issue. Even visitors from the lowlands who aren't adapted at all (not genetically adapted and haven't had time for their body to adjust) don't get brain damage (unless perhaps they try to live on the high peaks and even the locals rarely do that) they just have less energy and get short of breath easier. And of course you have the recent experiment caused by the fact that at least hundreds of millions and probably billions of people have worn masks occasionally, and at least tens of millions and probably hundreds of millions or very low billions have worn them frequently. And before that many millions wore them at least occasionally either as part of PPE for medical workers and workers in some other fields, or in a number of Asian countries with a culture of wearing masks any time your sick or any time there is even a mild epidemic. A subset of such people wear even more restrictive masks. N95 masks or the equivalent and medical masks that restrict even more than that, chemical protective mask in the military or in non-military HASMAT situations, improvised masks made of poorly chosen materials that don't breathe very well, etc. No sign of brain damage from wearing the masks in any of these cases, and little to no sign of damage of any type. The OSHA standard is 19.5 but they don't even say 13 percent at sea level is deadly or causes brain damage, but rather that it leaves no margin. Maybe 12 percent and certainly down in the single digits would be potentially very harmful . Or maybe 13 percent at sea level (or the equivalent partial pressure with a higher percentage but thinner air) would be.if you exert yourself or are under stress or are severely congested or have minor lung problems or any other medical issue that makes you more vulnerable. "( Federal Register, Vol. 63, p. 1159.) The rulemaking record for the Respiratory Protection Standard clearly justifies adopting the requirement that air breathed by employees must have an oxygen content of at least 19.5 percent. A lesser concentration of oxygen in employees' breathing air could endanger them physiologically and diminish their ability to cope with other hazards that may be present in the workplace. The rulemaking record also demonstrates that any workplace atmosphere controlled at or near your recommended minimal oxygen level of 100 mm of mercury at sea level (equivalent to about 13 percent oxygen at sea level) is not safe and healthful for all employees. Exposing employees to partial pressures of oxygen that approach 100 mm of mercury at sea level leaves them with no margin of safety from potentially debilitating effects" osha.gov Maybe people from the low lands hiking in the mountains or mountain climbing, or even at low altitude doing very intense and prolonged exercise esp. in hot weather shouldn't wear masks, but there is no evidence of any severe problems at more ordinary altitudes from doing things like sitting at work or walking around a grocery store. If there was to be a problem involving bacteria the mask itself becoming contaminated would be the most likely one, but if you use disposable masks and toss them every day (or maybe more if your wearing them all day and your concerned about it) that shouldn't be much of an issue either.