NEW METHODS FOR QUANTITATIVE RESPIRATOR FIT TESTING

在工作场所进行呼吸器适合性测试， 适合佩戴者面部特征的呼吸器，从而， 确保对空气传播危险的最低保护。的目的 研究是研究空气和气溶胶渗透的基本机制 通过面密封泄漏和过滤材料，并制定从 这一知识的定量适合测试，是容易和廉价的， 表演。 本文将研究两种常用的制冷机：1.一次性 主要或全部由轮廓滤波组成的滤波器 材料2.具有空气净化功能的半面罩式和全面罩式空调器 药筒连接到橡胶或硅树脂的不渗透体上。 一种新的尺寸分级气溶胶发生器，通过优先赠款开发 将用于确定表面密封和过滤器渗透 几种类型的一次性消毒器的特点。测试将 在人体模型和人体受试者上进行屏气和循环 呼吸模式由此，将推荐一种简化的测试， 评估工业气溶胶的广泛尺寸范围。对于一半和 全面罩呼吸器，将开发呼吸器完整性测试 并进一步简化和测试压力测试。实地研究 将进行评估新的拟合测试作为工作的预测因素 地方保护。

Respirator fit testing is performed in the workplace in order to find a respirator that fits the facial features of the wearer and, thereby, ensures a minimum of protection against airborne hazards. The aim of this research is to study the basic mechanisms of air and aerosol penetration through face seal leaks and the filtering materials, and to develop from this knowledge quantitative fit tests that are easy and inexpensive to perform. Two types of respirators in common use will be studied: 1. Disposable respirators which consist mostly or entirely of contoured filtering material. 2. Half and full face piece respirators which have air-purifying cartridges attached to an impermeable body of rubber or silicone. A new size fractionating aerosol generator, developed through prior grant support, will be used to determine the faceseal and filter penetration characteristics of several types of disposable respirators. Tests will be performed on mannequins and human subjects in the breath holding and cyclic breathing modes. From this, a simplified test will be recommended and evaluated for a broad size range of industrial aerosols. For the half and full face piece respirators, a respirator integrity test will be developed and the pressure test will be further simplified and tested. Field studies will be performed to evaluate the new fit tests as predictors for work place protection.