Nevada Patent of the Month – May 2021

Light is a common therapeutic and medicinal aid. For instance, blue light can be used to help inactivate Staphylococcus aureus, a bacteria responsible for staph infections. Research shows that the intensity and total energy of irradiation influences the effectiveness of treatment. However, as these factors increase, so does the chance of damaging other tissues nearby. CareWear Corp has designed a wearable system to facilitate this photo-eradication treatment in a more controlled manner.

Their wireless, wearable LED patch emits purple or blue light in pulses. This pulsed light has a peak irradiance and pulse duration strategically capped to allow the photoactive molecule to return to a ground state thereby creating an oxidation reaction. This reaction produces free radicals which can destroy the microorganisms. This pulsed light uses a lower irradiance than typical light treatments, protecting the surrounding tissue. This pulsed purple or blue light could be modified to work in other environments. For instance, rather than a patch that can be applied to skin, it could be installed inside a fridge and provide increased disinfection, killing bacteria that live on our food.

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