BACKGROUND Large imaging systems in hybrid operating rooms are used increasingly. However, the effect of these ceiling-mounted imaging systems on air quality during surgical procedures has not been studied to date. AIM To evaluate the level of colony-forming units (cfu)/m3 near the surgical wound and near the instrument table during surgery. METHODS Measurements were performed in four hybrid operating rooms at four different hospitals. During surgical procedures, at least three samples were taken with active slit air samplers. At the end of the day's surgical schedule, simulations involving movement of the ceiling-mounted system were also performed. The threshold value for the average cfu level during a surgical procedure was set at ≤10 cfu/m3, and for individual samples was set at ≤30 cfu/m3. RESULTS The median value near the surgical wound was 1 cfu/m3 and at the instrument table was 2 cfu/m3. However, in one hybrid operating room (two procedures out of 16) where the instrument table was not positioned directly under the unidirectional flow (UDF) system, the threshold value for the average cfu level at the instrument table was exceeded. For one of these procedures, the maximum value for an individual sample was also exceeded. CONCLUSIONS A ceiling-mounted imaging system in combination with a UDF system can result in cfu levels near the surgical wound and at the instrument table that are well below the threshold value of 10 cfu/m3 during surgery. If the instrument table is not positioned directly under the UDF system, the cfu level is higher.

中文翻译：

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在混合手术室中使用天花板安装式系统进行成像对手术期间菌落形成单位水平的影响。

背景技术在混合手术室中越来越多地使用大型成像系统。但是，迄今为止，尚未研究这些吊顶成像系统对手术过程中空气质量的影响。目的评估手术过程中靠近手术伤口和器械台附近的菌落形成单位（cfu）/ m3的水平。方法在四家不同医院的四个混合手术室中进行测量。在外科手术过程中，至少要用主动缝隙空气采样器采集三个样本。在一天的手术计划结束时，还进行了涉及吊顶系统运动的模拟。手术过程中平均cfu水平的阈值设置为≤10cfu / m3，单个样品的阈值设置为≤30cfu / m3。结果手术伤口附近的中位值为1 cfu / m3，器械台处的中位值为2 cfu / m3。但是，在仪表台未直接位于单向流（UDF）系统下方的一个混合手术室（16个程序中的两个程序）中，超过了仪表台平均cfu水平的阈值。对于这些程序之一，单个样本的最大值也被超过。结论与UDF系统结合的吊顶成像系统可能导致手术伤口附近和器械台的cfu水平远低于手术过程中10 cfu / m3的阈值。如果仪表台未直接放置在UDF系统下方，则cfu级别会更高。在一个仪表台未直接位于单向流（UDF）系统下方的混合手术室（16个程序中的两个程序）中，超过了仪表台平均cfu水平的阈值。对于这些程序之一，单个样本的最大值也被超过。结论与UDF系统结合的吊顶成像系统可能导致手术伤口附近和器械台的cfu水平远低于手术过程中10 cfu / m3的阈值。如果仪表台未直接放置在UDF系统下方，则cfu级别会更高。在一个仪表台未直接位于单向流（UDF）系统下方的混合手术室（16个程序中的两个程序）中，超过了仪表台平均cfu水平的阈值。对于这些程序之一，单个样本的最大值也被超过。结论与UDF系统结合的吊顶成像系统可能导致手术伤口附近和器械台的cfu水平远低于手术过程中10 cfu / m3的阈值。如果仪表台未直接放置在UDF系统下方，则cfu级别会更高。超出了仪器表上的平均cfu级别的阈值。对于这些程序之一，单个样本的最大值也被超过。结论与UDF系统结合的吊顶成像系统可能导致手术伤口附近和器械台的cfu水平远低于手术过程中10 cfu / m3的阈值。如果仪表台未直接放置在UDF系统下方，则cfu级别会更高。超出了仪器表上的平均cfu级别的阈值。对于这些程序之一，单个样本的最大值也被超过。结论与UDF系统结合的吊顶成像系统可能导致手术伤口附近和器械台的cfu水平远低于手术过程中10 cfu / m3的阈值。如果仪表台未直接放置在UDF系统下方，则cfu级别会更高。