Johnson B R, Bjork K A, Weed J B
TSI Incorporated, St. Paul, MN 55164.
Am Ind Hyg Assoc J. 1992 Dec;53(12):776-9. doi: 10.1080/15298669291360535.
A new, in-mask sampling technique has been developed that enhances current quantitative respirator fit test methods. This new sampling technique eliminates the need for a permanently modified (probed) respirator for conducting fit tests. With this new technique, a sample was drawn from the breathing zone inside the respirator by means of a sampling adapter, which was temporarily attached between one of the air-purifying filters and the facepiece before a fit test was performed. To ensure that the performance of the respirator was not altered, the sampling adapter was designed so that all major functional aspects of the respirator were unchanged. This new sampling technique was evaluated on human test subjects by simultaneous sampling from a probed respirator by using two quantitative respirator fit test instruments. One instrument sampled through a conventional respirator probe; the other used the new method. Test results show that equivalent fit test data were obtained with both sampling techniques.
一种新的面罩内采样技术已经研发出来，它改进了当前的定量呼吸器适合性测试方法。这种新的采样技术消除了进行适合性测试时对永久改造（探测式）呼吸器的需求。采用这种新技术时，在进行适合性测试前，通过一个采样适配器从呼吸器内部的呼吸区域抽取样本，该采样适配器临时连接在一个空气净化过滤器和面罩之间。为确保呼吸器的性能不受影响，采样适配器的设计使得呼吸器的所有主要功能方面都保持不变。通过使用两种定量呼吸器适合性测试仪器，同时从一个探测式呼吸器采样，在人体测试对象上对这种新的采样技术进行了评估。一种仪器通过传统的呼吸器探头采样；另一种则采用新方法。测试结果表明，两种采样技术都获得了等效的适合性测试数据。
