Posted on 04/29/2020 1:46:14 PM PDT by SJackson
Applications of ultraviolet germicidal irradiation disinfection in health care facilities: Effective adjunct, but not standalone technology
INTRODUCTION Ultraviolet germicidal irradiation (UVGI) has been used to ‘‘scrub’’ the air in health care facilities and laboratories for many decades. UVGI is known to be efficacious to varying degrees in controlling the circulation of airborne infectious particles. Approximately 60% of all UVGI air disinfection systems are installed in health care facilities.
According to Kowalski and Bahnfleth, this equates to 41% in hospitals and 19% in clinics. Until recently, most of the experimental data that led to the development of UVGI systems were decades old. Aside from anecdotal observations, little information about the actual performance of these systems in hospital rooms was available. Although UV light is known to inactivate microorganisms, limiting their ability to grow and multiply when inhaled or picked up on surfaces, there is insufficient evidence on which to base a decision to rely solely on UVGI as an engineering control for preventing health careassociated tuberculosis (TB) transmission.
Numerous laboratory studies, dating back to the 1930s, have been conducted to analyze the efficacy of UVGI for various microorganisms in a range of temperature and humidity conditions; few studies have evaluated the practical application of UVGI in health care buildings, however.
Most of the existing evidence comes from laboratory investigations conducted under simulated conditions. Our search revealed only one study that has been conducted in a physically realistic setting under controlled conditions.
That study served as the basis for the 2009 National Institute for Occupational Safety and Health (NIOSH) technical guidance document on the use of UVGI systems to protect health care providers from occupational TB infection.
This review examines the gaps in existing evidence and highlights design and operational factors that can significantly impact the efficacy of UVGI systems.
(Excerpt) Read more at orf.od.nih.gov ...
There are Freepers who can provide insight on most topics. UV, I've had it used by my dentist, for bacteria not adhesive, and dermatologist. I've used UV water purifiers. To kill the bad guys. I've been told it's been used to kill bacteria and virus' in the air of medical facilities since the early 90s. No, not the only solution. And I've been told it's used in cruise line and airline ventilation systems. And that the upper room air technology is relatively inexpensive and could be easily be used in non medical situations. I heard on Laura Ingram that a 3,200 sq ft facility requires less than $1,000 in equipment. My HVAC contractor, I suspect it would cost considerably more. But I'm curious what real live info Freepers might have to provide. The link is kind of interesting, but old.
I have a old bag vacuum that has a UV light under it for cleaning carpets to kill the germs as you vacuum
I know I could have bought the UV light option in my HVAC system when I bought my house as another way to clean the air that circulates.
I remember the goggles cabinet in wood shop had a UV light in it to disinfect the goggles between shop classes.
This isn’t new technology, its been around forever.
Tertiary treatment of recycled waste water going back into the drinking water pipeline has UV treatment, IIRC.
…there are many marketing claims suggesting that such systems, as well as mobile systems, will protect occupants against emerging diseases such as SARS CoV, influenza, M tuberculosis, and bioterrorism agents. These claims have not been substantiated by the existing data, however, and must be weighed against the many variables discussed in this literature review. For TB, there is ample laboratory and reasonable evidence from animal studies, but the key question remains the relative role of UVGI in the context of the hierarchy of controls to prevent health care-associated TB.The authors point out room air changes (with room air mixing top and bottom) with HEPA filters is the primary control of pathogens.
Look for “UC-C disinfection” products on Amazon. There are MANY these days because of the wide availability of cheap LEDs optimized to deliver narrow-band UV-C radiation. You can buy UV-C robots to travel around at night disinfecting your house. You can buy small boxes to disinfect your phone and other small articles. You can buy overhead devices that look like single blade fans to disinfect the unoccupied room. Lots of companies trying to get rich.
The History of Ultraviolet Germicidal Irradiation for Air Disinfection, by Nicholas G. Reed
Just swallow the apparatus with a glass of water.
Yes, reading it it’s not a one size fits all. But has been used in medical facilities for years. And I found the room air concept interesting. Far from a foolish comment made by the President. There are other threads on the possible IV use which is another issue. As to all the Amazon things, my shepards would finish off a UV-C robot instantly, unless it’s an R2D2 size thing which would take longer. Thanks for the info though, I’ve not seen the info on some of the things you mention. I never trusted the water purifiers, I preferred a filter, but have drank water they were used on (through straws?) and I’m still here.
In 1994 or so I worked as a travel nurse @ a world-renowned center for treating Multi-drug resistant TB and other Mycobacterial illnesses.
Over the beds in the negative pressure rooms were UV lights. We only used them for the TB patients, but they were protocol for that time to protect us against TB. Seemed pretty fancy to me.
That hospital and research center has since been folded into the University of Colorado Medical Center system. Back then it was National Jewish Center for Immunology and Respiratory Medicine. They did a ton of research there. Cool place to work, very interesting.
Mrs. AV
President Trump was brainstorming and speaking in Trump speak. The President in theory was exactly right in the premise of cleaning and purifying blood from a virus. Compare that to the left that brainstorms how to kill Americans by all means especially babies and those who support the President.
Old barber shops used to have an open ended box with a UV light in it to disinfect combs and scissors. We’re talking the 50-60’s.
Don’t bother posting this on You tube. They will remove it for violating its community guidelines.
Orange man bad.
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