METHOD FOR EVALUATING EFFECTIVENESS OF SURGICAL MASKS
METHOD FOR EVALUATING EFFECTIVENESS OF SURGICAL MASKS
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DOI：
10.1128/jb.83.3.663-667.1962
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发表时间：
1962-01-01
影响因子：
3.2
通讯作者：
VESLEY, D
中科院分区：
文献类型：
--
作者：
GREENE, VW;VESLEY, D
便携式隔离盒配有过滤空气供应和供试者头部进入的方式，将其连接到Andersen采样器上，并用于在掩蔽前后测量口腔排出的细菌污染物。这种技术产生了更详细的定量信息比通过沉降板或安德森采样在一个开放的空间。在谈话期间，未设盲的受试者每5 ft 3排出超过5000个细菌污染物; 7.2%的污染物与直径小于4 [mu]的颗粒相关。戴口罩的受试者平均排出19种污染物/5 ft 3; 63%的污染物直径小于4 [mu]。掩模效率根据污染物的颗粒尺寸而变化。该技术适用于对个人对环境污染贡献的常规评估。
A portable isolation box, provided with a filtered air supply and a means of access for a test subject''s head, was attached to an Andersen Sampler and used to measure orally expelled bacterial contaminants before and after masking. This technique yielded more detailed quantitative information than was obtained by either sedimentation plates or Andersen sampling in an unconfined space. During talking, unmasked subjects expelled more than 5000 bacterial contaminants per 5 ft3; 7.2% of the contaminants were associated with particles less than 4 [mu] in diameter. Masked subjects expelled an average of 19 contaminants /5 ft3; 63% were less than 4 [mu] in diameter. Mask efficiencies varied according to particle size of the contaminants. This technique is adaptable for routine evaluation of an individual''s contribution to environmental contamination.