Effect of a portable ultra-clean exponential airflow unit on the particle distribution in an operating room--颗粒学报PARTICUOLOGY

Sadrizadeh, S., & Holmberg, S. (2015). Effect of a portable ultra-clean exponential airflow unit on the particle distribution in an operating room. Particuology, 18, 170–178. https://doi.org/10.1016/j.partic.2014.06.002

Effect of a portable ultra-clean exponential airflow unit on the particle distribution in an operating room

Sasan Sadrizadeh^*, Sture Holmberg

Division of Fluid and Climate Technology, School of Architecture and the Built Environment, KTH Royal Institute of Technology, Stockholm, Sweden

10.1016/j.partic.2014.06.002

Volume 18, February 2015, Pages 170-178

Received 2 March 2014, Revised 4 June 2014, Accepted 9 June 2014, Available online 1 October 2014.

E-mail: sasan.sadrizadeh@byv.kth.se

Highlights

• Effect of local laminar ventilation on particle distribution in a clean room was investigated.

• Simulations were carried out using computational fluid dynamics.

• This ventilation scenario had ability to reduce particle concentration and deposition.

• Local ventilation system is a suitable option to reduce the contamination to an acceptable level.

Abstract

The effects of a mobile laminar airflow unit on the concentration, deposition and distribution of bacteria-carrying particles in an operating room are investigated. The exploration is carried out using numerical calculation schemes (computational fluid dynamics approach). The model validation was performed through result comparisons with published measurement data from literature. Two types of mobile screen units were evaluated as an extension of turbulent-mixing operating-room ventilation. Airborne particle concentration/sedimentation was recorded with and without a screen unit on the operating table and two instrument tables. Both active and passive air sampling were examined and the results are compared. It was found that the additional mobile ultra-clean laminar airflow unit reduces the counts of airborne bacteria and surface contamination to a level acceptable for infection-prone surgeries.

Graphical abstract

Keywords

Computational fluid dynamics; Bacteria-carrying particle; Surgical-site infection; Hospital operating room; Air quality; Active–passive air sampling

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