Groupe d'Étude sur le Risque d'Exposition des Soignants aux Agents Infectieux-GERES, Faculté de Médecine Xavier-Bichat, 16 Rue Henri-Huchard, 75018 Paris, France.
Med Mal Infect. 2012 Jun;42(6):264-9. doi: 10.1016/j.medmal.2012.05.001. Epub 2012 Jun 9.
The authors had for objective to evaluate the air-tightness of FFP2 respirator masks used by healthcare workers, with a quantitative fit-test protocol.
This test measures the number of ambient particles inside and outside the respirator mask. The ratio between both is called fit-factor. The fit-test is successful for an FFP2 respirator mask when the fit-factor is equal or superior to 100. The tests were performed in three hospitals. Nine types of FFP2 respirator masks were fit-tested, classified in three groups: hard shell, duckbill, and flat-fold respirator masks.
One hundred and eighty fit-tests were performed. Less than a third of the fit-tests were successful (35/130). The rate of successful tests was higher with flat-fold (57.5%, 23/40) than with duckbill (18.3%, 11/60), or hard shell respirator masks (3.3%, 1/30), (P<0.05). Zero to 60% of healthcare workers had a successful fit-test with the respirator masks used in each hospital. This percentage increased with the number of tested respirator masks. No 100% success rate was ever reached in any hospital with the three tested respirator masks.
Duckbill, and flat-fold respirator masks seem to be better adapted for healthcare workers than hard shell respirator masks. It seems necessary to implement new recommendations for respiratory protection in France. At least two types of respirator masks with various sizes and shape should be available and fitting controls should be performed with respirator masks that are worn by healthcare workers exposed to infectious risks.
作者旨在通过定量贴合测试方案评估医护人员使用的 FFP2 防护口罩的气密性。
该测试测量口罩内外的环境粒子数。两者的比值称为贴合因子。FFP2 防护口罩的贴合测试成功标准为贴合因子等于或大于 100。测试在 3 家医院进行。对 9 种 FFP2 防护口罩进行了贴合测试，分为 3 组：硬壳、鸭嘴型和折叠型口罩。
共进行了 180 次贴合测试。只有不到三分之一的测试成功（35/130）。折叠型口罩的成功率（57.5%，23/40）高于鸭嘴型（18.3%，11/60）或硬壳口罩（3.3%，1/30）（P<0.05）。每个医院使用的口罩，只有 0%至 60%的医护人员贴合测试成功。随着测试口罩数量的增加，成功率有所提高。在任何一家医院，都没有一种口罩能达到 100%的贴合成功率。
与硬壳口罩相比，鸭嘴型和折叠型口罩似乎更适合医护人员。法国似乎有必要实施新的呼吸防护建议。至少应提供两种不同尺寸和形状的口罩，并应使用医护人员实际佩戴的口罩进行贴合控制，以保护其免受感染风险。
