Numerical Study of Bacterial Influences Caused by Patient Breathing

Abstract

This research aims two major objectives: first, the influence of respiration on the particles concentration is investigated numerically in a cleanroom with a specified geometry and second, the respiration and the manner of particles diffusion are simulated. Generally, in many hospital cleanrooms such as the open-heart surgery, organ transplantation and neurosurgery rooms, reduction of the pollutant particles is important as a factor that can lead to capillary clogging during operation. In addition, the significance of reducing the concentration of large particles reveals more according to the fact that dust particles may act as a means for various pathogenic bacteria and viruses. Every bacterium has a dimension between 0.5 and 5 micrometers and the dimension of each virus is between 20 and 300 nanometers. Thus, it is evident that at least 1 bacterium and 15 viruses can fit on a 5-micrometer particle.

Experimental Study of the Ventilation Arrangement’s Effect on Particle Concentration in a Surgery Room

“…In many studies particles' diameter which can carry bacteria are considered between 5 to 10 μm in which gravity and buoyancy force have a huge influence on the particles [7]. In this study, concentration of particles in the air for different dimensions, with the complete internal room layout, for different arrangement of inlet gates is investigated.…”

Numerical Study of Patient Respiration Effect on Bacterial Dispersion in a Surgery Room

“…Many numerical studies focus on determining the effective parameters such as the particle distribution in a cleanroom, since considering these parameters is crucial in the design and fabrication process. For accurate assessment of the condition of the flow circulation, it is essential to determine the particle concentration distribution [9,10].…”