Furuhashi M
Bull Tokyo Med Dent Univ. 1978 Mar;25(1):7-15.
With the experimental apparatus designed and made available by Nicholes, we evaluated the bacterial filtration efficienty (B.F.E.) of the non-woven fabric and cotton cloth masks. The apparatus was supplied by Nicholes (U.S. Military Specification 36954 C mask, surgical, disposable). The study presented here was performed as a round robin test with Nicholes. By using this apparatus, comparison was made as to the B.F.E. of the six different kinds of surgical face mask before and after prolonged use. The result was obtained that the disposable mask made of glass fiber mat combined with non-woven fabric proved to be the highest in performance with a B.F.E. of 98.1-99.4%. It is useful both in preventing hospital infection and in general clinical practice. The B.F.E. of the conventional cotton cloth masks is not only lower but variable over a wide range of 43.1-93.6%.
利用尼科尔斯设计并提供的实验装置，我们评估了无纺布口罩和棉布口罩的细菌过滤效率（B.F.E.）。该装置由尼科尔斯提供（美国军方规格36954 C型口罩，外科用，一次性）。此处呈现的研究是与尼科尔斯合作进行的循环测试。通过使用该装置，对六种不同类型的外科口罩在长期使用前后的细菌过滤效率进行了比较。结果表明，由玻璃纤维毡与无纺布组合制成的一次性口罩性能最高，细菌过滤效率为98.1 - 99.4%。它在预防医院感染和一般临床实践中都很有用。传统棉布口罩的细菌过滤效率不仅较低，而且在43.1 - 93.6%的广泛范围内变化。
