title: An analysis of pulse wave signals during visual display terminal operations.
abstract: In this paper, participants operated visual display terminals (VDT); the authors analyzed their pulse wave signals to develop objective indices for diagnosing and assessing VDT-induced. The experiment used 30 healthy undergraduates test subjects; each subject operated static PC for 4 hours. The pulse waves of local blood volumes in the test subjects' finger-tips were measured every 30 minutes for 2 minutes. After the experiment, the pulse wave parameters were analyzed. All test subjects exhibited signs of visual fatigue according to the fatigue scale results. There were significant differences of heart rate (HR), which clearly declined before and after the experiment (P<0.01). The indexes RMSSD, SDNN, P3, P4, P5, P6, and TP had significant differences (P<0.01) and all rose. The positions of the main and dicrotic waves advanced (P<0.01). The experiment parameters prompted significant changes; pulse wave forms changed during VDT work. Based on these results, pulse wave analysis holds promise as an effective, noninvasive technique for measuring VDT fatigue.
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wang
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Song
authors.initials: S
authors.lastname: Zhang
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Liang
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, China.
authors.forename: Jingxuan
authors.initials: J
authors.lastname: Cui
mesh_terms: D001810:Blood Volume; D016288:Computer Terminals; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D005222:Mental Fatigue / Q000175:diagnosis / Q000503:physiopathology*; D063177:Pulse Wave Analysis / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014584:User-Computer Interface; D014796:Visual Perception; D055815:Young Adult
keywords: Pulse wave; fatigue; pulse wave characteristic values; visual display terminal (VDT)