Efectos Fisiológicos de Pulsos de Luz de Diodo Adicionados a una Lámpara de Trabajo para Mejorar el Estado de Alerta en Personal de Hospitales o Trabajadores por Turnos

Translated title of the contribution: Physiological effects of pulsed LED light added to a task lamp to improve alertness on employees of hospital or shift workers

C. A. Chaveznava-Treviño, S. Lee, T. Katsuura, Y. Shimomura

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this study is to investigate the effect of a continuous stream of pulses of monochromatic blue pulsed (BP) and a combination of blue and green pulsed (BGP) light-emitting diode (LED) light conditions on physiological responses. This study is an approach to clarify the most suitable LED combination and flickering frequency to evoke alertness when a continuous stream of pulsed LED light is delivered and may suggest applications of continuous pulsed light as support for task illumination for shift workers, hospital nurses, school students or office employees. Combinations were delivered by exposures of BPLED and BGPLED pulses at 100, 200, and 400 Hertz over two background light colors (BLC). Participants were exposed to 12 different light conditions in a counterbalanced procedure. By integrating measures of electroencephalogram (EEG) and pupil constriction; results suggested significant changes in responses during the interaction of BLC, LED, and EEG. Beta waves exhibited a statistically significance (p < 0.05) in arousal levels when exposed to BG light, although no active task was involved during exposure. Furthermore, pupil reacted with larger constriction towards BGPLED exposure than towards monochromatic BPLED exposure, thus demonstrating that a continuous stream of pulses can deliver the same irradiance as if delivered in a continuous flow and without affecting perception as no flickering was perceived in any of the conditions by a qualitative evaluation.

Translated title of the contributionPhysiological effects of pulsed LED light added to a task lamp to improve alertness on employees of hospital or shift workers
Original languageSpanish
Pages (from-to)29-42
Number of pages14
JournalRevista Mexicana de Ingenieria Biomedica
Volume41
Issue number1
DOIs
Publication statusPublished - Jan 2020

Bibliographical note

Publisher Copyright:
© 2020 Sociedad Mexicana de Ingenieria Biomedica. All rights reserved.

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

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