There has been a lot of interest in the development of effective and more comprehensive environmental disinfection strategies and, in the last year, attention has been focused on improving “no touch” technologies, including the use of the mobile UV-light disinfection system, which has the advantages of not requiring changes in a room’s ventilation, not leave residue after treatment, and having a broad spectrum of action and rapid exposure times. 

The germicidal effects of UVC irradiation results in cellular damage by photohydration, photosplitting, photodimerization, and photocrosslinking, thereby inhibiting cellular replication. UVC can be generated from low-pressure mercury lamps that produce continuous UVC with a peak wavelength of 254 nm, and pulsed xenon lamps that emit pulsed light at high intensity, both in the spectrum of UVC (100–280 nm) and visible (380–700 nm) radiation, with a much broader microbicidal activity spectrum [14]. 

The UV-light disinfection system must operate in unoccupied rooms, after the patient discharge and in the absence of health personnel. 

Many devices have motion sensors that shut-off the device if any movement is detected inside the room being disinfected. 

Damage to materials in the room was not reported during the use of UV-light disinfection systems, although in the Pulsed-UVC device operator manual, high pressure acrylic material may show degradation for prolonged periods of exposure to light UV (e.g., daily or weekly), therefore it is advised to cover them during the treatment.