Wilkes A R, Benbough J E, Speight S E, Harmer M
Department of Anasthetics and Intensive Care Medicine, University of Wales College of Medicine, Cardiff CF14 4XN, UK.
Anaesthesia. 2000 May;55(5):458-65. doi: 10.1046/j.1365-2044.2000.01327.x.
The bacterial and viral filtration performance of 12 breathing system filters was determined using test methods specified in the draft European standard for breathing system filters, BS EN 13328-1. All the filters were of two types, either pleated hydrophobic or electrostatic, and these two types differed in their filtration performance. The filtration performance is expressed in terms of the microbial penetration value, defined as the number of microbes passing through the filter per 10 million microbes in the challenge. The geometric mean (95% confidence limits) microbial penetration value was 1.0 (0.5, 3.5) and 2390 (617, 10 000) for the pleated hydrophobic and electrostatic filters, respectively, for the bacterial challenge, and 87 (48, 212) and 32 600 (10 900, 84 900), respectively, for the viral challenge. In general, there was little change in the microbial penetration values following 24 h simulated use. It is concluded that results from the tests specified in the draft standard will allow comparisons to be made between different manufacturers' products enabling an informed choice to be made.
采用欧洲呼吸过滤器标准草案BS EN 13328-1中规定的测试方法，测定了12种呼吸过滤器的细菌和病毒过滤性能。所有过滤器均为两种类型，即褶状疏水型或静电型，这两种类型的过滤性能有所不同。过滤性能以微生物穿透值表示，定义为每1000万个挑战微生物中通过过滤器的微生物数量。对于细菌挑战，褶状疏水型和静电型过滤器的几何平均（95%置信限）微生物穿透值分别为1.0（0.5，3.5）和2390（617，10000）；对于病毒挑战，分别为87（48，212）和32600（10900，84900）。一般来说，经过24小时模拟使用后，微生物穿透值变化不大。得出的结论是，标准草案中规定的测试结果将有助于比较不同制造商的产品，从而做出明智的选择。
