28.11.2014
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By submitting your bid, you'll be contractually committing to buy this item from the seller if you are the winning bidder. By submitting your bid, you're committing to buy this item from the seller if you're the winning bidder. By clicking Confirm, you commit to buy this item from the seller if you are the winning bidder. By clicking Confirm, you're committing to buy this item from the seller if you're the winning bidder and have read and agree to the Global Shipping Programme terms and conditions - opens in a new window or tab. By clicking 1 Click Bid, you are agreeing to buy this item from the seller if you're the winning bidder. Known as Ultraviolet Germicidal Irradiation (UVGI), this new method employs light in the ultraviolet wavelength (400nm and 10nm — shorter than visible light, longer than X-rays).
Turns out, two specific frequencies of 265nm and 185nm, do most of the damage, penetrating cellular walls and disrupting DNA replication (dimerising adjacent pairs of thymine, specifically) which in turn prevents the cell from replicating or repairing itself, rendering it harmless if not outright dead.
There are two primary means of producing UV light in these two frequencies — continuous mercury vapour UV lamps and pulse xenon UV.
In hospitals, surgical instruments and operating theatres aren’t the only vectors for disease transmission, patients are just as likely to pick up a secondary infection from something in the recovery room. In addition to copious amounts of hand sanitizer and bleach washes, hospitals are now turning to devices like the UV emitter from Xenex Healthcare Services.


At this point, UV disinfection remains a supplementary process to chemical cleaning methods, however, the market for these devices is growing and is expected to grow from $US30 million to $US80 million in the next three years. The ozone these things create is going to significantly shorten the lifespan of everything in the room!
Interesting fact, UV is actually universally effective at causing irreversible DNA degradation (against people, plants, animals). There are a few things that have been shown to make it more effective at killing what you want to kill (germs), and not what you don't (people) usually by pulsing the light at different timings - but that's really pretty much about exposing people to as little as possible, while still achieving enough exposure to kill all different germ varieties within that time range. With a son currently in an Intensive Care unit, who has been tested positive with VRE (google it), I can assure you that not all "super bugs" are just colds, flus or the like - some are bugs that can kill tiny children who don't have a chance to "get a bit dirty". The rate that these bugs can be transferred around a hospital is so scary (and I know, because I have to live with it, in hospital, every day with my son) that if there is actually an outbreak, I'd have serious, grave concerns for the health of some people. I'd prefer to have new technologies, like this UV tech, which can prevent the spread of these bugs, without having to give the patient yet another injection, or something else to digest, because sometimes the patients can't just keep being given the anti-biotics (something that actually leads to VRE). I'm still not convinced that UV emitters will ever replace chemical disinfectants, but I can see it as a great addition to the team, for those spots that often get overlooked when cleaning. Truss on Sale Sale Used New Learn 800-268-5520 Call or chat with us now!
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Import charges previously quoted are subject to change if you increase your maximum bid amount. These infections kill around 100,000 vulnerable patients and cost the American healthcare industry $US30 billion annually. UV light is present in natural sunlight and, although the most damaging wavelengths (extreme UV from 10nm to 120nm and midrange UV from 280nm to 315nm) are filtered by our ozone layer before they penetrate the atmosphere (97 per cent of UV overall), all wavelengths can alter molecular bonds and are capable of damaging biological tissue.
Many American utilities have also been using UV methods for water sterilisation (both potable and wastewater) since 1916 and the practice has garnered EPA approval. Eighty-six per cent of the light emitted by Mercury-vapour lamps shines at 254nm, near one of the germicidal peaks, however these lamps are energy intensive and filled with a toxic gas. Perhaps, just maybe, you don't realise the difference between the technologies and didn't think that this Gizmodo article may be more informed than you, or I. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. Import charges previously quoted are subject to change if you increase you maximum bid amount. To combat hyper-infectious agents, like Clostridium difficile (C-diff) or Methicillin-resistant Staphylococcus aureus (MRSA), doctors are turning to a different method of disinfection to destroy bacteria by tearing their DNA apart with UV light. The most common form of ionising damage incurred by humans is sunburn, though UV rays will burn through a cornea if given the chance. Xenon pulse lamps, flash a UV light much more energetic than what Mercury-vapour can produce, which reduces disinfection time, and utilise an intert gas instead. At least in the US, facilities are very aware how much the environment can impact risk for infections. As such, they require a clear line-of-sight unobstructed by shadows, dust or fluids preferrably in a sealed environment, which allows cycling air currents to repeatedly pass under the lights.




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