How Do We Manage “Dose” Requirements for UV Disinfection?

Posted by Tru-D SmartUVC 06.21.17

In part 1 of our series on “Humans Managing Disinfectant Dwell Time,” Cathy Campbell, Tru-D’s Director of Program Management, shared a concept of having to manage “dwell time” of disinfectant solutions to effectively kill pathogens.  We might agree it’s difficult to maintain vigilance around “watching the solution dry” or ensuring the ES Technician’s cleaning tasks do not waver from standard protocols when you are not observing these technicians clean.

In Part 2 of this series, we will suggest eliminating the potential of human error when adding an additional intervention to manual cleaning and disinfection– UVC. Tru-D SmartUVC’s technology has the ability to manage a fully completed UVC dose without human interaction while the disinfection cycle is active.

Science has proven the peak of cell deactivation is at 254 ųW/cm2 (microwatts per centimeter squared). To irradiate a pathogen using UVC, a consistent level of energy must be emitted for a specific amount of time to equal a “dwell time or dose” of lethal radiant energy. Not all mobile UV devices emit energy at the peak of cell deactivation, nor do they have trusted and unbiased science backing their claims for disinfection. Lastly and most importantly, not all mobile devices measure the dose returning to the device; therefore, doubt exists that unseen pathogens in the room have been deactivated.

“Reflective energy” or the energy returning to smart sensor technology is measurable and the sensors calculate the time required to ensure pathogens in direct line of sight as well as in shadowed areas are neutralized.  Science enables you to trust Tru-D SmartUVC, a tested and proven “smart” device that measures dose by adjusting to the variables in each individual room without having to rely on a Technician to move the device.

Consider a UVC device capable of measuring the level of dose reaching all surfaces in the room; both direct line of site and in shadowed areas. This is very different than a device that must be placed a specific distance from the surface you want to disinfect.  Devices that rely on time require an ES Technician to stay available to move the device, often more than once, and position it correctly to ensure that unseen pathogens are flooded with energy within the distance and timeframes recommended by the manufacturer.

A fail-safe system for disinfecting unseen organisms measures where light reflects as it is flooding the room, ensuring all surfaces, seen and unseen, are touched by energy. The Anderson study referenced in Part 1 of this series was a precursor to the randomized clinical trial that proved the Tru-D UVC device would reduce the risk of patients acquiring a hospital infection by a cumulative 30% (Anderson, et all, CDC Prevention Epicenters Program. (2017). Enhanced terminal room disinfection and acquisition and infection caused by multidrug-resistant organisms and Clostridium difficile (The Benefits of Enhanced Terminal Room disinfection study). Lancet, (Feb 25;389(10071); 805-814).

In closing, it is rare that we question the efficacy of our EPA Registered disinfectants, but disinfectant labels provide us with a false sense of security when, in the end, we do not manage dwell time adherence to the manufacturer’s instructions.

The proven technology of a smart UVC device that is capable of measuring reflective dose, allows us the opportunity to layer our manual cleaning with a reliable disinfection intervention that consistently manages the dose.  It is difficult to refute the science, validating a UVC device backed by a cluster-randomized, multi-center, cross-over study.

Posted 06.21.17
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