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Assessment of aloe vera for qualitative fit testing of particulate respirators: a logistic regression approach.
Industrial Health ( IF 2 ) Pub Date : 2019-06-01 , DOI: 10.2486/indhealth.2109-0019
Anahita Fakherpour 1 , Mehdi Jahangiri 1 , Saeed Yousefinejad 1 , Mozhgan Seif 2 , Sean Banaee 3
Affiliation  

Fit testing procedure is required for filtering facepiece respirators (FFRs) to ascertain an acceptable fit between the skin and facepiece sealing surface. The present study seeks to compare the efficacy of Aloe vera (A. vera) and commercial BitrexTM as challenge agents of qualitative fit testing of particulate respirators. An herbal solution consisting of A. vera at seven different concentrations was developed. Threshold Screening Tests (TSTs) of A. vera solutions were compared to BitrexTM. To do so, solutions were administered randomly on a total of 62 participants. A placebo was also tested to ensure the taste response being valid. Statistical analysis was performed using R 3.2.5.0 software. There were no statistically significant differences between the A. vera (41.7, 58.3, 75, and 91.7 mg/ml) and BitrexTM threshold tests. Therefore, the minimum concentration of A. vera to develop the threshold solution was considered to be 41.7 mg/ml. When commercial products are expensive and unavailable, a cost-effective technique would be to replace A. vera solution with a commercial product as a challenge agent of qualitative fit testing of respirators.

中文翻译:

芦荟评估用于颗粒呼吸器的定性拟合测试:逻辑回归方法。

过滤口罩呼吸器(FFR)需要合适的测试程序,以确保蒙皮和面罩密封表面之间的可接受配合。本研究旨在比较芦荟(A. vera)和商用BitrexTM作为颗粒呼吸器定性拟合测试的挑战剂的功效。开发了由七种不同浓度的维拉曲霉组成的草药溶液。比较了A.vera溶液的阈值筛选测试(TST)与BitrexTM。为此,对总共62位参与者随机分配了解决方案。还对安慰剂进行了测试,以确保味道反应有效。使用R 3.2.5.0软件进行统计分析。A. vera(41.7、58.3、75和91.7 mg / ml)与BitrexTM阈值测试之间没有统计学上的显着差异。因此,产生阈值溶液的维拉农杆菌的最低浓度被认为是41.7 mg / ml。当商业产品价格昂贵且无法获得时,一种经济有效的技术将是用商业产品替代A. vera解决方案,作为呼吸器定性适合性测试的挑战剂。
更新日期:2019-11-01
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