The addition of a mobile ultra-clean exponential laminar airflow screen to conventional operating room ventilation reduces bacterial contamination to operating box levels

AbstractThe purpose of this work was to evaluate the decontamination potential of the Potok system both in an experimental setting in a research Operating Room (OR) with standalone Air Decontamination Units (Potok 150-M-01) and in a clinical setting in a real operating theatre in Moscow. Our experiments showed an impact of the Potok units on the bacterial contamination of the room air according to the Swedish SIS-TS 39:2015 standard. For the initial measurements in our research OR in Weiden this could be shown by a decrease of the bacterial burden at all three different measurement points (OR table, instrumentation tray, periphery). Also the subsequently done measurements in the Moscow hospital verified this decontaminating effectivity of the Potok system. In this case the initial background contamination of the operating theatre was higher than in the research OR in Germany. This bacterial burden could be effectively decreased by the use of the installed Potok based ventilation system.

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P22.02 Estimating operating room ventilation system performance in realistic scenarios

Journal of Hospital Infection ◽

10.1016/s0195-6701(10)60215-0 ◽

2010 ◽

Vol 76 ◽

pp. S64

Author(s):

W. Zoon ◽

J. Hensen ◽

P. Zuurbier ◽

J. Treur ◽

M. Loomans

Keyword(s):

Operating Room ◽

System Performance ◽

Ventilation System ◽

Room Ventilation ◽

Room Ventilation System

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Wound Ventilation With Ultraclean Air for Prevention of Direct Airborne Contamination During Surgery

Infection Control and Hospital Epidemiology ◽

10.1086/502395 ◽

2004 ◽

Vol 25 (4) ◽

pp. 297-301 ◽

Cited By ~ 12

Author(s):

Mikael Persson ◽

Jan van der Linden

Keyword(s):

Operating Room ◽

Median Number ◽

Airborne Particles ◽

University Hospital ◽

Surgical Wound ◽

Wound Model ◽

Wound Contamination ◽

Room Ventilation ◽

Airborne Contamination ◽

Number Of Particles

AbstractBackground and Objective:Despite the novelties in operating room ventilation, airborne bacteria remain an important source of surgical wound contamination. An ultraclean airflow from the ceiling downward may convey airborne particles from the surgical team into the wound, thus increasing the risk of infection. Therefore, similar ventilation from the wound upward should be considered. We investigated the effect of wound ventilation on the concentration of airborne particles in a wound model during simulated surgery.Design:Randomized experimental study simulating surgery with a wound cavity model.Setting:An operating room of a university hospital ventilated with ultraclean air directed downward.Interventions:Particles 5 um and larger were counted with and without a 5-cm deep cavity and with and with-out the insufflation of ultraclean air.Results:With the surgeon standing upright, no airborne particles could be detected in the wound model. In contrast, during simulated operations, the median number of particles per 0.1 cu ft reached 18 (25th and 75th percentiles, 12 and 22.25) in the model with a cavity and 15.5 (25th and 75th percentiles, 14 and 21.5) without. With a cavity, wound ventilation markedly reduced the median number of particles to 1 (range, 0 to 1.25;P< .001).Conclusions:To protect a surgical wound against direct airborne contamination, air should be directed away from the wound rather than toward it. This study provides supportive evidence to earlier studies that operating room ventilation with ultraclean air is imperfect during surgical activity and that wound ventilation may be a simple complement. Further clinical trials are needed.

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Perioperative Bacterial Contamination from Patients on Contact Precaution in Operating Room Environment

Open Forum Infectious Diseases ◽

10.1093/ofid/ofaa508 ◽

2020 ◽

Author(s):

Hajime Kanamori ◽

William A Rutala ◽

Maria F Gergen ◽

David J Weber

Keyword(s):

Operating Room ◽

Bacterial Contamination ◽

Multidrug Resistant ◽

Aerobic Bacteria ◽

Contact Precaution ◽

Contact Precautions

Abstract We investigated the microbial burden on the operating room environment when patients on contact precautions for a multidrug-resistant pathogen received surgery. Our study demonstrated that the perioperative environment was contaminated with aerobic bacteria and MRSA after surgery, and that MRSA persisted environmentally even after cleaning/disinfection, highlighting the need for meticulous cleaning/disinfection in the perioperative environment.

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Influence of Gas Flows and Operating Room Ventilation on the Daily Exposure of Anesthetists to Halothane

Anesthesia & Analgesia ◽

10.1213/00000539-197211000-00035 ◽

1972 ◽

Vol 51 (6) ◽

pp. 968???974 ◽

Cited By ~ 5

Author(s):

LILIA USUBIAGA ◽

J. ANTONIO ALDRETE ◽

VERA FISEROVA-BERGEROVA

Keyword(s):

Operating Room ◽

Gas Flows ◽

Daily Exposure ◽

Room Ventilation

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The effect of type of ventilation used in the operating room and surgical site infection: A meta-analysis

Infection Control and Hospital Epidemiology ◽

10.1017/ice.2020.1316 ◽

2020 ◽

pp. 1-6

Author(s):

Jian Bao ◽

Jianhua Li

Keyword(s):

Vascular Surgery ◽

Surgical Site Infection ◽

Operating Room ◽

Hip Replacement ◽

Meta Analysis ◽

Conventional Ventilation ◽

Total Knee Arthroplasties ◽

Site Infection ◽

Room Ventilation ◽

Total Knee

Abstracts Background: The relation between type of ventilation used in the operating room and surgical site infection has drawn considerable attention with its conflicting results. A possible relationship between the type of ventilation used in the operating room and surgical site infection has been reported. This meta-analysis was performed to evaluate this relationship. Methods: A systematic literature search up to May 2020 identified 14 studies with 590,121 operations, 328,183 operations of which were performed under laminar airflow ventilation and 261,938 of which were performed operations under conventional ventilation. These articles reported relationships between type of operating-room ventilation with its different categories and surgical site infection: 10 studies were related to surgical site infection in the total hip replacement; 7 studies in total knee arthroplasties; and 3 studies in different abdominal and open vascular surgery. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated comparing surgical site infection prevalence and type of operating room ventilation using the dichotomous method with a random-effects or fixed-effects model. Results: No significant difference was found between operation performed under laminar airflow ventilation and conventional ventilation in total hip replacement (OR, 1.23; 95% CI, 0.97–1.56, P = .09), in total knee arthroplasties (OR, 1.14; 95% CI, 0.62–2.09; P = .67), and in different abdominal and open vascular surgery (OR, 0.75; 95% CI, 0.43-1.33; P = .33). The impact of the type of operating room ventilation may have no influence on surgical site infection as a tool for decreasing its occurrence. Conclusions: Based on this meta-analysis, operating under laminar airflow or conventional ventilation may have no independent relationship with the risk of surgical site infection. This relationship forces us not to recommend the use of laminar airflow ventilation because it has a much higher cost compared to conventional ventilation.

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