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Temperature-controlled airflow ventilation in operating rooms compared with laminar airflow and turbulent mixed airflow

Artikel i vetenskaplig tidskrift
Författare M. Alsved
A. Civilis
P. Ekolind
A. Tammelin
Annette Erichsen Andersson
J. Jakobsson
T. Svensson
M. Ramstorp
S. Sadrizadeh
P. A. Larsson
M. Bohgard
T. Šantl-Temkiv
J. Löndahl
Publicerad i Journal of Hospital Infection
Volym 98
Nummer/häfte 2
Sidor 181-190
ISSN 0195-6701
Publiceringsår 2018
Publicerad vid Institutionen för vårdvetenskap och hälsa
Sidor 181-190
Språk en
Länkar https://doi.org/10.1016/j.jhin.2017...
Ämnesord Air sampling, BioTrak, Energy efficiency, Fluorescence, Surgical site infection, Temperature-controlled ventilation
Ämneskategorier Hälsovetenskaper, Annan medicin och hälsovetenskap

Sammanfattning

© 2017 The Authors. Aim: To evaluate three types of ventilation systems for operating rooms with respect to air cleanliness [in colony-forming units (cfu/m 3 )], energy consumption and comfort of working environment (noise and draught) as reported by surgical team members. Methods: Two commonly used ventilation systems, vertical laminar airflow (LAF) and turbulent mixed airflow (TMA), were compared with a newly developed ventilation technique, temperature-controlled airflow (T c AF). The cfu concentrations were measured at three locations in an operating room during 45 orthopae dic procedures: close to the wound ( < 40cm), at the instrument table and peripherally in the room. The operating team evaluated the comfort of the working environment by answering a questionnaire. Findings: LAF and T c AF, but not TMA, resulted in less than 10cfu/m 3 at all measurement locations in the room during surgery. Median values of cfu/m 3 close to the wound (250 samples) were 0 for LAF, 1 for T c AF and 10 for TMA. Peripherally in the room, the cfu concentrations were lowest for T c AF. The cfu concentrations did not scale proportionally with airflow rates. Compared with LAF, the power consumption of T c AF was 28% lower and there was significantly less disturbance from noise and draught. Conclusion: T c AF and LAF remove bacteria more efficiently from the air than TMA, especially close to the wound and at the instrument table. Like LAF, the new T c AF ventilation system maintained very low levels of cfu in the air, but T c AF used substantially less energy and provided a more comfortable working environment than LAF. This enables energy savings with preserved air quality.

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