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我公司是做:
1:新MDR法规和MDD指令的欧盟CE认证,CE*四版评价报告更新/编写
2:欧盟自由销售证书,欧盟授权代表(德国,荷兰,英国),
3:ISO9001/ISO13485认证以及咨询
4:FDA注册,FDA510K,FDA验厂/陪审和翻译
5:MDSAP咨询,国内注册证,生产许可证的申请
• A higher BFE percentage indicates a better protection level for the patient against infective agents from the OR staff.
• 这个BFE比值越高,说明口罩能的保护病人不易因为手术人员而感染。
Classification:
分类
• BFE => 95% TYPE I
• BFE => 98% TYPE II
• A different BFE test called the "Modified Green & Vesley" or BFE in vivo has been used frequently in the past. This test method always provides extremely high values, but does not really differentiate between different quality surgical facemasks. The BFE in vivo test method is therefore not part of the new EU standard.
• 不同的BFE测试可以称为“修改版的Green&Vesley”或者体外BFE,这种方法在过去经常被使用。这种测试方法能提供高的值,但并不真正的区分出不同质量口罩。这种体外BFE测试方法因此没有成为新的欧盟标准的一部分。
2. Breathing Resistance (Delta P)
呼吸阻抗 它是指气体在流经呼吸道及呼吸装置时的耗功加总值。
• Test is used to determine the resistance airflow of the facemask.
• 这种测试来确定口罩的气流阻力。
• To test, a controlled flow of air is driven through a sample of the surgical mask containing all layers. The pressure before and after the sample is measured; the difference in pressure is divided by the surface (in cm2) of the sample.

我公司是做:
1:新MDR法规和MDD指令的欧盟CE认证,CE*四版评价报告更新/编写
2:欧盟自由销售证书,欧盟授权代表(德国,荷兰,英国),
3:ISO9001/ISO13485认证以及咨询
4:FDA注册,FDA510K,FDA验厂/陪审和翻译
5:MDSAP咨询,国内注册证,生产许可证的申请
• 测试方法:使用一股定量的气流通过包含所有层的口罩样品。测量通过样品之前和之后的压力,这个不同的压力值再除以口罩的表面积(cm2)。
• A lower breathing resistance indicates a better comfort level for the user. It means the mask feels cooler and easier to breath through, and that the mask will maintain its shape in a better way as there is less pressure on the material. There will be less unfiltered air escaping around the mask.
• 一个较低水平的呼吸阻抗值说明使用者使用起来更舒服。说明口罩戴起来感觉更加凉爽和更*呼吸,因为在材料上面的压力较小,所以口罩更*保持不变形。这样还能减少从口罩边缘呼出的未经过滤的气体。
Classification:
分类
• TYPE I & II (non splash resistant) = < 3.0 mmH2O/cm2
• 类别I&II(非防溅)= < 3.0 mmH2O/cm2
• TYPE IR & IIR (splash resistant) = < 5.0 mmH2O/cm2
• 类别IR&IIR(防溅)= < 5.0 mmH2O/cm2
• The breathing resistance is always measured per square centimeter of material. One way to increase comfort is to have a low breathing resistance value per cm2, the other to enlarge the surface of the facemask and thereby the total area available for ventilation.
• 呼吸阻抗通常是用来测量每平方厘米材料上的值。一个增加舒适性的方法就是降低每平方厘米的呼吸阻抗,另外的一个方法就是通过口罩的表面积来口罩的可过滤的区域。

EUROPEAN STANDARD EN 14683
欧盟标准 EN 14683
This standard is intended to help facilitate the choice of surgical face masks in the European Market by standardizing the information and performance data required for the masks.
本标准旨在利用标准化的信息和口罩的性能数据来帮助欧盟市场方便的选择口罩。
There are three test methods used to classify surgical masks:
有三种测试方法用来给口罩进行分类:
1. Bacterial Filtration Efficiency in vitro (BFE) (ASTM F2101-07)
体外过滤率(BFE)(ASTM F2101-07)
• Test is used to determine the amount of infective agent that is retained by the surgical facemask, which is directly related to the amount of bacteria released through the mask into the air of the surgical theatre.
• 这个测试是用来确定口罩上残留的源,此源直接影响到手术室空气中由口罩中释放出的数目。
• To test, a controlled flow of air containing an aerosol with a controlled concentration of Staphylococcus aureas is driven through a sample of the surgical mask containing all layers. The average size of the aerosol droplets is around 3.0 Micron. The number of bacteria that passes the sample is compared to the number that passes without the mask sample.
• 测试方法:使用一个喷雾装置,用来释放出固定流量的空气流,这个空气流包含着一定浓度的金葡萄球菌,让这股空气流穿过包含所有层的口罩。喷雾口的平均尺寸为3微米。通过样品的数目和没有样品时的数目进行比较。
• A higher BFE percentage indicates a better protection level for the patient against infective agents from the OR staff.
• 这个BFE比值越高,说明口罩能更好的保护病人不易因为手术人员而感染。
Classification:
分类
• BFE => 95% TYPE I
• BFE => 98% TYPE II
• A different BFE test called the "Modified Green & Vesley" or BFE in vivo has been used frequently in the past. This test method always provides extremely high values, but does not really differentiate between different quality surgical facemasks. The BFE in vivo test method is therefore not part of the new EU standard.
• 不同的BFE测试可以称为“修改版的Green&Vesley”或者体外BFE,这种方法在过去经常被使用。这种测试方法能提供较高的值,但并不真正的区分出不同质量口罩。这种体外BFE测试方法因此没有成为新的欧盟标准的一部分。

Breathing Resistance (Delta P)
呼吸阻抗 它是指气体在流经呼吸道及呼吸装置时的耗功加总值。
• Test is used to determine the resistance airflow of the facemask.
• 这种测试来确定口罩的气流阻力。
• To test, a controlled flow of air is driven through a sample of the surgical mask containing all layers. The pressure before and after the sample is measured; the difference in pressure is divided by the surface (in cm2) of the sample.
• 测试方法:使用一股定量的气流通过包含所有层的口罩样品。测量通过样品之前和之后的压力,这个不同的压力值再除以口罩的表面积(cm2)。
• A lower breathing resistance indicates a better comfort level for the user. It means the mask feels cooler and easier to breath through, and that the mask will maintain its shape in a better way as there is less pressure on the material. There will be less unfiltered air escaping around the mask.
• 一个较低水平的呼吸阻抗值说明使用者使用起来更舒服。说明口罩戴起来感觉更加凉爽和更*呼吸,因为在材料上面的压力较小,所以口罩更*保持不变形。这样还能减少从口罩边缘呼出的未经过滤的气体。
Classification:
分类
• TYPE I & II (non splash resistant) = < 3.0 mmH2O/cm2
• 类别I&II(非防溅)= < 3.0 mmH2O/cm2
• TYPE IR & IIR (splash resistant) = < 5.0 mmH2O/cm2
• 类别IR&IIR(防溅)= < 5.0 mmH2O/cm2
• The breathing resistance is always measured per square centimeter of material. One way to increase comfort is to have a low breathing resistance value per cm2, the other to enlarge the surface of the facemask and thereby the total area available for ventilation.
• 呼吸阻抗通常是用来测量每平方厘米材料上的值。一个增加舒适性的方法就是降低每平方厘米的呼吸阻抗,另外的一个方法就是通过口罩的表面积来口罩的可过滤的区域。
3. Splash Resistance (ASTM F1862-07)
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