scholarly journals Effect of human movement on airborne disease transmission in an airplane cabin: study using numerical modeling and quantitative risk analysis

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Zhuyang Han ◽  
Gin Nam Sze To ◽  
Sau Chung Fu ◽  
Christopher Yu-Hang Chao ◽  
Wenguo Weng ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Risk Analysis ◽  
Disease Transmission ◽  
Human Movement ◽  
Quantitative Risk Analysis ◽  
Airborne Disease

scholarly journals Splatters and Aerosols Contamination in Dental Aerosol Generating Procedures

2021 ◽  
Vol 11 (4) ◽  
pp. 1914
Author(s):  
Pingping Han ◽  
Honghui Li ◽  
Laurence J. Walsh ◽  
Sašo Ivanovski
Keyword(s):  
Particle Size ◽  
Disease Transmission ◽  
High Speed ◽  
Low Speed ◽  
Dental Procedures ◽  
Dental Equipment ◽  
Produce Contamination ◽  
Fluorescein Dye ◽  
Filter Papers ◽  
Airborne Disease

Dental aerosol-generating procedures produce a large amount of splatters and aerosols that create a major concern for airborne disease transmission, such as COVID-19. This study established a method to visualise splatter and aerosol contamination by common dental instrumentation, namely ultrasonic scaling, air-water spray, high-speed and low-speed handpieces. Mock dental procedures were performed on a mannequin model, containing teeth in a typodont and a phantom head, using irrigation water containing fluorescein dye as a tracer. Filter papers were placed in 10 different locations to collect splatters and aerosols, at distances ranging from 20 to 120 cm from the source. All four types of dental equipment produced contamination from splatters and aerosols. At 120 cm away from the source, the high-speed handpiece generated the greatest amount and size (656 ± 551 μm) of splatter particles, while the triplex syringe generated the largest amount of aerosols (particle size: 1.73 ± 2.23 μm). Of note, the low-speed handpiece produced the least amount and size (260 ± 142 μm) of splatter particles and the least amount of aerosols (particle size: 4.47 ± 5.92 μm) at 120 cm. All four dental AGPs produce contamination from droplets and aerosols, with different patterns of distribution. This simple model provides a method to test various preventive strategies to reduce risks from splatter and aerosols.

scholarly journals Extended Lifetime of Respiratory Droplets in a Turbulent Vapor Puff and Its Implications on Airborne Disease Transmission

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Kai Leong Chong ◽  
Chong Shen Ng ◽  
Naoki Hori ◽  
Rui Yang ◽  
Roberto Verzicco ◽  
...  
Keyword(s):  
Disease Transmission ◽  
Airborne Disease ◽  
Respiratory Droplets

scholarly journals Quantitative Risk Analysis for N-Methyl Pyrrolidone Using Physiologically Based Pharmacokinetic and Benchmark Dose Modeling

2009 ◽  
Vol 113 (2) ◽  
pp. 468-482 ◽  
Author(s):  
Torka S. Poet ◽  
Chris R. Kirman ◽  
Michael Bader ◽  
Christoph van Thriel ◽  
Michael L. Gargas ◽  
...  
Keyword(s):  
Risk Analysis ◽  
Benchmark Dose ◽  
Quantitative Risk Analysis ◽  
Physiologically Based Pharmacokinetic ◽  
Physiologically Based ◽  
Methyl Pyrrolidone

scholarly journals Quantitative risk analysis for road tunnels complying with EU regulations

2010 ◽  
Vol 13 (8) ◽  
pp. 1027-1041 ◽  
Author(s):  
Konstantinos A. Kirytopoulos ◽  
Athanasios A. Rentizelas ◽  
Ilias P. Tatsiopoulos ◽  
George Papadopoulos
Keyword(s):  
Risk Analysis ◽  
Quantitative Risk Analysis ◽  
Road Tunnels
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