Proposal of Optimization of the Irradiance Pattern Emitted by the Medical Assistance Device Rapha®

Abstract

The diabetes mellitus (DM) is one of the most complex health problems worldwide, presenting high mortality and morbidity rates, in which, one of its most frequent pathologies is the diabetic foot. The diabetic foot occurs due to a metabolic disorder, leading wounds to take longer healing periods than expected, in most cases, resulting in ulcers and then to non-traumatic amputations. In this context, to support defective wound healing processes, the phototherapy assistance device RaphaⓇ is introduced, inducing—by means of photostimulation—the tissue neoformation and angiogenesis. This device applies a LED (Light-Emitting Diode with wavelengths of approximately 680 nm) matrix for low light intensity treatment, emitting luminous energy to injured regions. Furthermore, aiming a proper and efficient therapy, it is necessary to evaluate the LEDs distribution layout and the influence of different matrix dimensions in the output luminous emission. Therefore, an algorithm for simulation is implemented, using the software MATLAB® 2015a, The MathWorks, Inc., Natick, MA, applying the Lambert Law equation—that describes the light behavior in different materials. In sum, two different layouts are analyzed—the current rectangular form and a new hexagonal suggested arrangement, aiming an improved LED matrix layout with an optimized irradiance emission pattern.