MBP Researcher Explores Using UV Light to Sterilize N95 Masks
MBP scientist Dr. Lothar Lilge and his research team have applied their expertise in light propagation to explore the effectiveness of using UV light to sterilize Personal Protective Equipment (PPE) for potential reuse by medical personnel. Throughout the COVID-19 pandemic, there has been a critical shortage of PPE for front-line workers, particularly N95 masks. This research, published in a recent Journal of Biophotonics article entitled ‘Light propagation within N95 filtered face respirators: A simulation study for UVC decontamination’, aims to provide a model for effective PPE sterilization, which can ultimately help diminish shortages of vital PPE in the ongoing fight against COVID-19.
Article Abstract
'This study presents numerical simulations of UVC light propagation through seven different filtered face respirators (FFR) to determine their suitability for Ultraviolet germicidal inactivation (UVGI). UV propagation was modeled using the FullMonte program for two external light illuminations. The optical properties of the dominant three layers were determined using the inverse adding doubling method. The resulting fluence rate volume histograms and the lowest fluence rate recorded in the modeled volume, sometimes in the nW cm-2 , provide feedback on a respirator's suitability for UVGI and the required exposure time for a given light source. While UVGI can present an economical approach to extend an FFR's useable lifetime, it requires careful optimization of the illumination setup and selection of appropriate respirators.'
Read the research article.