An array of high intensity UVC LEDs usable for in vivo reduction of patient viral load or ex vivo sterilization.

Algorithm for controlling a photon pattern generated by means of a multicolour LED lighting system and inducing by means of said photon pattern a desired response in an organism, said algorithm being in a format executable by a control system of the multicolour LED lighting system and comprising instructions to cause said control system to operate LEDs of the multicolour LED lighting system to emit at least one predetermined varying photon pattern. The instructions define at least the following group of parameters for each varying photon pattern to be emitted: target location, intensity, duty cycle and wavelength band, and variations of at least one of said parameters over time. The instructions are such that the resulting varying photon pattern generated by means of the multicolour LED lighting system induces said desired response in said organism as a result of the combination of said defined parameters and the defined variations thereof.

An ultraviolet light-emitting phosphor having excellent degradation resistance and emission intensity is provided. The ultraviolet light-emitting phosphor is a phosphor comprising yttrium element, scandium element, aluminum element and oxygen element, which is excited by irradiation of vacuum ultraviolet rays or electron beams to emit ultraviolet rays.

A method of destroying pathogens disposed upon an epidermis includes providing a hand held device including a grip and a lamp, transmitting far-UVC light via the lamp, and filtering the transmitted far-UVC light to attenuate portions of transmitted UVC light that have a wavelength known to cause damage to an epidermis of a human. The epidermis is scanned by tracing the hand held device over a localized area of the epidermis thereby illuminating the localized area with the filtered far-UVC light. The filtered far-UVC light destroys pathogens disposed upon the epidermis while not causing adverse biological damage to the epidermis.

A therapeutic endotracheal tube assembly is provided for insertion into a patient's trachea to ventilate, to maintain patency of the patient's airway, and to deliver therapeutic electromagnetic radiation (EMR) to the patient. The therapeutic endotracheal tube assembly has an endotracheal tube and an EMR delivery system. The EMR delivery system has an EMR source for emitting non-ultraviolet, therapeutic EMR having intensity sufficient to activate desired therapeutic properties within the patient and an EMR conduction line conducive to the propagation of EMR from the EMR source along the endotracheal tube. The EMR conduction line is removably insertable into the endotracheal tube. The therapeutic endotracheal tube assembly may be custom made or may be constructed by retrofitting a removably insertable EMR delivery system to an existing endotracheal tube.

Radiant energy control systems, methods, and apparatuses are provided. An example light emitting device may comprise a sensor operable to detect whether a space is occupied, and a controller in communication with the sensor and operable to cause output, via a first light emitter white light comprising a wavelength range of 380 to 420 nm, and cause output, via a second light emitter a non-white light comprising a wavelength range of 380 to 420 nm.

An antimicrobial light dressing device, system and method for a percutaneous treatment that bathes a treatment region around the percutaneous insertion with an antibacterial illumination source for preventing pathogens around the insertion from entering via the dermal puncture created by the insertion. The antimicrobial light dressing device combines a circumferential body centered around the insertion, and an arrangement of LEDs around the body that focus the light around the insertion and onto a therapeutic region of the insertion. An opening in the circumferential body has an articulated protrusion for offsetting a medicinal vessel such as an IV tube off the skin surface to avoid blocking light to an area under the vessel.

A method for inactivating medically important Gram-positive bacteria including Methicillin-resistant Staphylococcus aureus (MRSA), Coagulase-Negative Staphylococcus (CONS), Streptococcus, Enterococcus and Clostridium species, comprising exposure to visible light, and in particular light within the wavelength range 400-500 nm.

A light source device including a light emitting element for emitting a light having the following characteristics: a wavelength ranging from 435 to 520 nm, and a power density greater than 20 mW/cm.sup.2, the light source device provides an effective fluence to any contaminating and/or pathogenic agent greater than 11 J/cm2. Also, a light source assembly including a product adapted to be in contact with a support or a medium, preferably the skin or a wound and a light source device connected to the product for providing light to at least one contaminating and/or pathogenic agent present on a support or in a medium.

A method of controlling application of a dose of light energy for treatment to disinfect an area includes causing the dose of light energy to be emitted from at least one light emitting device, receiving a wavelength and intensity of light emitted from a fluorescent component within the area being disinfected by the dose of light energy, and adjusting at least one of a current, a voltage, a pulse width, and a pulse frequency applied to the at least one light emitting device based on the received wavelength and intensity of the light emitted from the fluorescent component.