UV Room Sterilizer
UV-A: Ultraviolet bandwidths in the 320-400 nanometer range
Has no germicidal effectiveness
UV-B: Ultraviolet bandwidths in the 280-320 nanometer range
UV-C: Ultraviolet C; Ultraviolet bandwidths in the 200 – 280
UVC has a high degree of germicidal effectiveness in inactivating
bacteria, viruses, and fungi
Of the three, UV-C is the most powerful and effective when it comes
to killing pathogens in the operating room.
Test after test has conclusively determined that xenon powered
ultraviolet light is more effective and efficient at disinfecting
On average, a xenon UV robot will complete disinfection in around
10 times less the amount of time. For example, a mercury robot’s 60
minutes would be approximately 6 minutes for a xenon robot.
UV light is a reliable, well-studied antimicrobial technology.
sterilizer works primarily by destroying the DNA inside bacteria, viruses and
fungi. The high-energy portion of the UV spectrum called UV-C is
most effective. UV-C light has been used for decades to disinfect
industrial surfaces and sanitize drinking water. It is especially
advantageous for use in hospitals because it kills the
spore-forming bacterium Clostridium difficile, which is a major
source of hospital-acquired infections.
Whole-room UV disinfection
machine were first introduced to US hospitals around 2007. Since then,
popularity has surged because they sanitize practically all of the
surfaces in a room at once, with minimal labor and without
hazardous chemicals. Even companies with roots in chemical
disinfection have entered the whole-room UV disinfection market.
For instance, Clorox recently formed a partnership with UV-device
Shapes, sizes, and features of UV room disinfection devices vary.
Most are the size of a small refrigerator or office water cooler.
Some run for short periods of time while others run longer. Certain
devices run until UV sensors placed in the room measure a
particular UV dose. Some have mirrors that focus the
UV light as the beam rotates around the room. Some are controlled digitally
by touch-screens, while others are more simple analog devices. Many
have motion sensors which shut the device off automatically if a
person enters the room during treatment.
HOW ARE UV ROOM DISINFECTION DEVICES REGULATED?
The United States Environmental Protection Agency (EPA) is the
primary regulator of chemical pesticides and pesticidal devices,
though FDA and various US States also take part. EPA defines
microorganisms as pests, disinfectants as pesticides, and
disinfecting devices as pesticidal devices. Pesticidal devices are
not subject to pre-market approval by EPA, though EPA does require
data supporting efficacy to be held on file. Companies that make
ultraviolet sterilizer must register with the Agency, then report how many units are sold
each year thereafter.
EPA does not generally review or approve data supporting
performance of UV devices before they are sold, so the onus is on
infection control practitioners and hospital buyers to ensure the
machines are killing microorganisms as promised. Careful evaluation
of manufacturer claims is necessary to ensure the UV devices
deliver the real benefit: reduction of hospital-acquired