Sorry to read about your condition and thanks for bringing up this matter. Quite an interesting read.
One thing i would actually worry about is over using this kind of technology though. If you grow up in a sterile environment you are likely to get sick with about anything if you wander into the ‘real world’… But of course it would be a big improvement for a lot of such applications. I hope it starts to get deployed in hospitals soon.
Do you think that your idea and implementation is something that makers of UVC packages for hospitals have not thought of?
Seems like companies such as www.americanultraviolet.com would have all of the answers and knowledge that you are seeking.
Yes they make UVC lamps for hospitals. But they are probably working around 254 nm. This is dangerous to people. My understanding is that 207 use is not yet approved by the FDA.
One problem with using light to sterilize is, it can’t get everywhere.
That is indeed true.
However, a significant factor in preventing surgical infection is the fact that the UVC will blow things out of the air.
In a surgical situation, most (if not all) of the tools and materials being used have been sterilized. More UV can’t hurt, and could improve the results. But a major element of contamination is airborne. Even with air filtration and sterilization protocols. Or a few contaminates from someone’s hair, nose, shoes, fingernails, breathing, and on and on. All these things can be a useful attack vector for UVC (207 nm).
The other application is to provide a localized source to protect the patient from pathogenic crap to be imported by nurses, family visits, food delivery persons, stethoscopes, the bed linen, water cups, blood pressure cuffs, IV insertions, not always really effectively washing hands, unfiltered air in the room, contagion of linen (e.g., would you like a blanket?), bed pans, just touching the bed or tray, and any other material effectively exposed to the surgical site. The potential contamination from just a few little tiny microbes can kill you. The personnel, equipment, the environment are simply not suitably disinfected.
Thinking how to create a completely sterile environment can hurt your head. But it is unlikely will you will figure out and block everything that is trying to kill the patient. And a hospital room simply cannot protect you.
You should consider 222nm lamps for a variety of reasons. We are working towards FDA approval for cornea disinfection.
Also show 99.99% air disinfection “kill-on-the-fly” single pass in an HVAC unit. UVC get’s less than 1%.
Good luck.
Just a note. As noted by Far-UV, I believe 222nm is going to be the target. I have not seen any useful semiconductor products at that frequency That certainly does not mean there are none. Or won’t be. The technology seems to be plasma discharge. This requires high voltage power supplies.
Far-UV. I am curious why the 222 nm radiation has to be approved for such a specific use. From what I have seen there is quite enough research to validate that the 222 nm radiation causes no harm to human surfaces. There are commercial devices outside the US. Why should it have to be approved for each human part in the US?
I am so excited about this technology. Here is a company claiming to have UVC LED capable of emitting any “single wavelength”. optical bypass filters can also be used to narrow wavelength to the desired frequency long as it emittes uv within the range one is looking for. The other factor to control is the intensity of the UVC.
Hi. I have been unable to get my computers to actually work for the last month and a half. One working. Go Microsoft; or simply be sent to Hell.
I am not sure if you are talking about another source or what I have posted. If you have new information; please post a link.
There have been multiple situations with hospitals hiding the fact that dangerous biologics are loose in hospitals (secure treatment areas, simple hospitalization and homes). Bad air is a significant component of spreading the diseases. No satisfactory methods are available for protecting patients, visitors, bed components, room contamination, nurses and other workers marching through the room touching everything. It goes on.
We are activity causing the propagation of human death so pigs and chickens can get big and inexpensive.
Was googling for affordable 222nm bulbs. Most are 254 nm and the search landed me at this forum.
Wan’t going to reply because I need to create a new account.
Then I realized that you did reply to a 2018 thread in 2020.
Anyway, I created the account so that I could reply with this link:
They have a 222nm uvc lamp, but I think their business is to sell expensive products, so it would be costly.
Hope it might be helpful, and hope your health is better now.
Still searching for 222nm products that I can DIY. The 254 nm ones are quite affordable, but I have to be out of the room to be safe.
I’m also interested in this, given recent events.
It seems like lasers and optical frequency doubling may be one way to do it. I’m not familiar with optics, need to spend more time learning.
I know this is an old thread, but I saw the discussion about Far UV-C lighting.
Here is a company who is starting to build these devices.
I just happened to send them an email earlier today with an inquiry into purchasing options.
I doubt that any products can be had immediately, but this was the most promising company I have seen for the Excimer bulbs which fit within the range you mentioned.
Good luck with your medical situation.
UV light is only line kill of sight except 185nm uv which also creates ozone as well as corona discharge units and ozone gas will find its way into every crevice. Ozone levels max are .8ppm and 5ppm is considered immediately dangerous So you can use ozone only if no living thing is is the room that can be harmed [includes plants] and you are willing to wait for the ozone levels to dissapate [1/2 life if 20 to 30 minutes]. an alternative is a Hydroxyl generator of OH generator which uses a UVC light with titantium dioxide coated filter or zinc coated mesh with moist air. Nanoparticle TiO2 and ZnO provide the greatest surface area and both metal are photocatalytic especially with humid air. UV light striking the metals produce OH ions aka Hydroxyl ions which float around in the air and destroy smoke and bacteria, etc. While there is some discussion that some VOCs can be broken down into equally hazardous byproducts, Hydroxyl generators are considered far safer than ozone generators and are used my many restoration companies that need to be working while the air is being decontaminated.
As far as the 207 to 222 nm uv being safe for human skin and eyes, this is true though counterintuitive since 222nm is a shorter wavelength than 254 uvc lamps so 222 would be more energetic and one would assume for it to be more damaging, but research has shown multiple times for Far uv of 297 to 222 to be safe. the researcher has suggested it might find use in surgeries to keep open wound from being infected by aerosol pathogens but not sure he has studied direct effects on tissue other than skin and eyes
You did not mention the company making these uvc leds? Most of the 60 watt uvc leds on amazon are fake, they just juse light blue leds to look like uvc but several utubes are out there with guys that have UV meters and these register no uvc no uvb or uva, too bad
While the use of Colloidal Silver as therapeutic medicine may be challenged as quack medicine [it is not going to cure your corona virus], It may well however kill the virus on surfaces since , the biocidal properties of Silver and many other metals is well researched, documented and proven. One can clean a pool or a pond with silver and copper electrodes When i was born, they put drops of Silver Nitrate into the eyes of every new born.
Below i pasted a researchgate article and i just read another comparing 9 metals for their biocidal properties but this one below used silver and silver worked better than all the other metals. One of the reasons utensils were made of Silver. Copper plated hospital surfaces often kill bacteria in 10 or 15 minutes and even the corona virus can not last longer than 3 or 4 hours on copper.rticlePDF Available
None of ushio care 22 uv bulbs are for sale, only oem manufacturers have access until the end of 2020 according to their website
Hi lightbringer,
Funny story, i once saw a man on the today show who had blue skin from drinking copious amounts of colloidal silver for a month or two. Apparently some sort of cyanotic reaction, not enough oxygen. That extreme case aside, While i would not expect Colloidal silver to knock out a Corona Virus infection, i personally have used Colloidal silver for sore throats and for mouth or gum infections or for rinsing wounds. Silver ions certainly have micro-biocidal activity, and this has been clearly demonstrated in the scientific literature. I posted one artice above and i will post another here. I myself use copper hydroxide (a fungicide in latex paint in the bottom of pots to stop root circling, copper sulfate is use to kill tree roots is sewer lines. I have use copper pipes as electrodes to kill algae in a pool. There are studies now on the superiority of copper plating over stainless steel for hospital surfaces. Nickel and Tin can also kill plant roots on contact
The oligodynamic effect (from Greek oligos "few", and dynamis "force") is a biocidal effect of metals, especially heavy metals, that occurs even in low concentrations.
In modern times, the effect was observed by Karl Wilhelm von Nägeli, although he did not identify the cause.[1] Scholarly texts from ancient India promoted the use of brass and silver in ritual cleansing practice as well as in consumption of food and drink. The ancient Indian medical text Sushruta Samhita promoted the use of specific metals in surgical procedures as a measure to prevent infection. Brass doorknobs and silverware both exhibit this effect to an extent.
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It is now common knowledge that a variety of metal ions are toxic to bacteria (Nies, 1999; Harrison et al., 2004). Overall, the metals that are being increasingly considered for antimicrobial agents are typically within the transition metals of the d‐block, (V, Ti, Cr, Co, Ni, Cu, Zn, Tb, W, Ag, Cd, Au, Hg) and a few other metals and metalloids from groups 13–16 of the periodic table (Al, Ga, Ge, As, Se, Sn, Sb, Te, Pb and Bi). An interesting discovery made over 10 years ago that metals have strong efficacy against microbes growing as a biofilm (Teitzel and Parsek, 2003; Harrison et al., 2004). This was significant as a quintessential phenotype of biofilms is their antimicrobial resistance (Stewart and Costerton, 2001). Furthermore, metals have shown some efficacy on persister cells, the dormant variants of regular cells that were impervious to antibiotics (Harrison et al., 2005a,b).
Here is a nice picture
In this string, I don’t believe that anyone actually claims to have obtained 222 nm using an LED. At present the lowest wavelength available from an LED is 235 nm, and at this time that’s considered to be basic research rather than something available for consumer use. Anyone who does claim to be selling LED’s that emit in the range 207-222 nm is a fraud.
