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Alternative ventilation system for operating theaters: Parameter study and full-scale assessment of the performance of a local ventilation system

机译:手术室的替代通风系统:参数研究和局部通风系统性能的全面评估

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A local operating theater ventilation device to specifically ventilate the wound area has been developed and investigated. The ventilation device is combined with a blanket which lies over the patient during the operation. Two configurations were studied: Configuration 1 where HEPA-filtered air was supplied around and parallel to the wound area and Configuration 2 where HEPA-filtered air was supplied from the top surface of the blanket, perpendicular to the wound area. A similar approach is investigated in parallel for an instrument table. The objective of the study was to verify the effectiveness of the local device. Prototype solutions developed were studied experimentally (laboratory) and numerically (CFD) in a simplified setup, followed by experimental assessment in a full scale mock-up. Isothermal as well as non-isothermal conditions were analyzed. Particle concentrations obtained in proposed solutions were compared to the concentration without local ventilation. The analysis procedure followed current national guidelines for the assessment of operating theater ventilation systems, which focus on small particles (<10 mu m). The results show that the local system can provide better air quality conditions near the wound area compared to a theoretical mixing situation (proof-of-principle). It cannot yet replace the standard unidirectional downflow systems as found for ultraclean operating theater conditions. It does, however, show potential for application in temporary and emergency operating theaters. (C) 2016 Elsevier Ltd. All rights reserved.
机译:已经开发并研究了局部手术室通风设备,以专门为伤口区域通风。通风设备与毯子结合在一起,毯子在手术过程中位于患者上方。研究了两种配置:配置1,其中在伤口区域周围并与伤口区域平行地供应HEPA过滤的空气;配置2,其中从毯子的上表面垂直于伤口区域供应HEPA过滤的空气。对于仪表台,并行研究了类似的方法。该研究的目的是验证本地设备的有效性。所开发的原型解决方案在简化的设置中进行了实验(实验室)和数字(CFD)研究,然后在全面模型中进行了实验评估。分析了等温和非等温条件。将建议溶液中获得的颗粒浓度与没有局部通风的浓度进行比较。分析程序遵循当前国家评估手术室通风系统的准则,该准则侧重于小颗粒(<10微米)。结果表明,与理论混合情况(原理证明)相比,本地系统可以在伤口区域附近提供更好的空气质量条件。它不能替代超洁净手术室条件下的标准单向下降系统。但是,它确实显示了在临时和紧急手术室中应用的潜力。 (C)2016 Elsevier Ltd.保留所有权利。

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