為改善依據美國職業安全衛生署建議密合度測試程序所產生備用過多款式拋棄式N95口罩之管理困擾，研究提出測試程序落實措施，要求受測者對特定款式N95口罩都進行測試，並於測試過程中監測並即時指導調整口罩正確密合佩戴。研究中利用美國常用之TSI定量密合度測試儀(PortaCount Plus Model 8020)搭配N95模組評估醫護人員佩戴拋棄式N95口罩之密合度，透過是否通過密合度測試結果及受測者問卷調查，評估此修正是否可行。問卷結果發現，密合度測試後90%以上的醫護人員更清楚口罩與臉型密合情形、更有信心正確佩戴口罩、及願意繼續進行密合度測試情形，可知推動密合度測試對醫護人員有實質之助益。在方法上，二種方式實際測試結果比較發現，對特定款式N95口罩要求受測者都進行測試，並未降低通過測試之比例。而透過監測並及時指導調整，實際密合度測試結果明顯增加通過比例，受測者問卷認知顯示對正確密合佩戴口罩認知及信心也未明顯變化，可知對拋棄式N95口罩採取此種方式進行密合度測試是屬可行。

For improving the problem of stock management that employer followed the fit test procedure of OSHA (Occupational Safety and Health Administration, American) standard for N95 filtering facepiece respirators. The study modified the procedure of OSHA fit test, the procedure required all the subjects to test assigned N95 mask, and monitor the result of fit test and adjust in time. The fit factors of health workers by quantitative fit test (QNFT) using TSI PORTACOUNT Plus (Model 8020, TSI, St. Paul, Minn.) with N95-champion which is OSHA-accepted fit test methods(appendix A to 1910.134: Fit Testing Procedure) and the questionnaires of subjects' attitude and cognition were assessed the feasibility of the modified procedure. The over 90% of the health workers caught the fit between face with mask clearer, increased the confidence of correctly worn the mask, hoped carried to QNFT fit testing by the result of questionnaires. The QNFT fit test in the study had helped the health workers to correctly worn the mask. The change required all the subjects to test assigned N95 mask was not affected the rate of passing QNFT fit test and decreased the wish of the health workers to wear the mask through the health workers' same cognitions testing by 2 procedures. The change monitored the result of fit test and adjust in time had increased the rate of passing QNFT fit test and didn't affected the cognitions of the confidence of correctly worn the mask, and the distinct knowledge of the fit between face and mask. To adjust the procedure of OSHA fit test for N95 filtering facepiece respirators is feasibility.