Buchberg H, Amstutz H C, Wright J D, Lodwig R M
Clin Orthop Relat Res. 1975 Sep(111):151-5. doi: 10.1097/00003086-197509000-00021.
Airborne micro-organisms, a suspected cause of surgical wound infection, are significantly reduced by the use of filtered unidirectional air flow (UAF) in operating rooms. A horizontal UAF system was installed at UCLA for evaluation and to determine procedures which would optimize its use. Major findings are listed: though the air flow was found to be somewhat turbulent and non-uniform in velocity downstream from the filter-bank entrance, the gross flow direction was maintained throughout the protected region; airborne particles were swept downstream with little vertical drop and no large scale recirculation; proper orientation and placement of objects in the clean air stream maximized its purging effect; correlation of non-viable with viable particle counts was not possible; better control of sources of contamination, particularly the operating team, would further reduce the potential for airborne infection; as yet there is no definitive proof that the addition of filtered UAF in a modern operating room reduces occurrences of deep wound sepsis.
空气传播的微生物是手术伤口感染的一个可疑原因，在手术室中使用过滤单向气流（UAF）可显著减少此类微生物。加州大学洛杉矶分校安装了一个水平UAF系统用于评估，并确定能优化其使用的程序。列出的主要发现如下：尽管发现气流在滤器组入口下游有些湍流且速度不均匀，但在整个保护区内总气流方向得以保持；空气中的颗粒被向下吹扫，垂直下落很小且没有大规模的再循环；在清洁气流中物体的正确定向和放置可使其吹扫效果最大化；无法将无生命颗粒计数与有生命颗粒计数相关联；更好地控制污染源，尤其是手术团队，将进一步降低空气传播感染的可能性；目前尚无确凿证据表明在现代手术室中添加过滤UAF能减少深部伤口败血症的发生。
