Crutchfield C D, Murphy R W, Van Ert M D
School of Health Related Professions, University of Arizona, Tucson 85719.
Am Ind Hyg Assoc J. 1991 Jun;52(6):249-51. doi: 10.1080/15298669191364677.
An automated version of a new method for quantitative respirator fit testing by controlled negative pressure was compared with a computerized aerosol fit test system. The controlled negative pressure technique eliminates many of the problems associated with aerosol and pressure decay fit test methods. A series of fixed leaks was used to compare the leak measurement capabilities of the controlled negative pressure system against a standard computerized aerosol fit test system. Negative pressure and aerosol fit factors determined for a series of fixed leaks through hypodermic needles were highly correlated with each other (r = 0.998) and with the cross-sectional areas of the leak needles (r greater than 0.995).
一种通过控制负压进行定量呼吸器适合性测试的新方法的自动化版本与计算机化气溶胶适合性测试系统进行了比较。控制负压技术消除了许多与气溶胶和压力衰减适合性测试方法相关的问题。使用一系列固定泄漏来比较控制负压系统与标准计算机化气溶胶适合性测试系统的泄漏测量能力。通过皮下注射针的一系列固定泄漏确定的负压和气溶胶适合因数彼此高度相关（r = 0.998），并且与泄漏针的横截面积高度相关（r大于0.995）。
