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Baseline Study of Ultra-Clean Air Change Rate, Number, and Type of Microorganisms and Level of Particles During Trauma Surgery.
HERD
January 2025
Faculty of Mechanical Engineering, Delft University of Technology, Delft, The Netherlands.
The objective of an operating room (OR) ultra-clean ventilation system is to eliminate or reduce the quantity of dust particles and colony-forming units per cubic meter of air (CFU/m). To achieve this, ultra-clean goal high air change rates per hour are required to reduce the particle load and number of CFU/m. To determine the air quality in an ultra-clean OR during surgery, in terms of the number and type of microorganism and quantity of dust particles in order to establish a benchmark.
View Article and Find Full Text PDFAddressing Challenges of Membrane Clogging in AF4-UV-ICPMS Analysis for Size Determination of Trace Elements in Acidic, Organic-Rich Peat Bog Waters.
Anal Chem
September 2024
Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2H1, Canada.
The analysis of colloid-associated trace elements (TEs) in acidic, organic-rich waters (pH 3.8-5.8) using AF4-UV-ICPMS often necessitates the use of neutral or weakly alkaline carriers (pH 7-8.
View Article and Find Full Text PDF[Ion chromatography-pulsed amperometry method for determination of trace hydrogen sulfide in air].
Se Pu
August 2024
Analysis and Testing Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China.
Hydrogen sulfide (HS) is a pervasive gaseous pollutant that emits the characteristic odor of rotten gas, even at low concentrations. It is generated during various industrial processes, including petroleum and natural gas refining, mining operations, wastewater treatment activities, and refuse disposal practices. According to statistics from the World Health Organization (WHO), over 70 occupations are exposed to HS, rendering it a key monitoring factor in occupational disease detection.
View Article and Find Full Text PDFAnalysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation.
Build Environ
May 2024
School of Chemical Engineering, University of Birmingham, Edgbaston Campus, Birmingham, B15 2TT, United Kingdom.
Ultra-Clean-Air (UCA) operating theatres aim to minimise surgical instrument contamination and wound infection through high flow rates of ultra-clean air, reducing the presence of Microbe Carrying Particles (MCPs). This study investigates the airflow patterns and ventilation characteristics of a UCA operating theatre (OT) under standard ventilation system operating conditions, considering both empty and partially occupied scenarios. Utilising a precise computational model, quasi-Direct Numerical Simulations (qDNS) were conducted to delineate flow velocity profiles, energy spectra, distributions of turbulent kinetic energy, energy dissipation rate, local Kolmogorov scales, and pressure-based coherent structures.
View Article and Find Full Text PDFOperating Room Air May Harbor Pathogens: The Role of an Ultraviolet Air Filtration Unit.
J Arthroplasty
November 2024
International Joint Center, Acibadem University Hospital, Istanbul, Turkey.
Background: One important factor for the prevention of surgical site infections is ultraclean air in the operating room (OR). Still, the direct sterilization potential of most technologies, especially in a dynamic clinical setting, is not well understood. We aimed to determine and compare the microbial presence from the inlet and outlet flow of a filtration unit with crystalline ultraviolet-C (C-UVC) light.
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