KN 95 FILTERING HALF MASK MEDICAL 5PLY 3D MASK

What Are KN95 Masks?
KN95s are closely related to N95s, but only the latter is approved for use in medical settings in the U.S., and the reasoning is pretty simple: N95s are the U.S. standard, while KN95s are the Chinese standard for these close-fitting filtration devices.
Both are rated to filter out 95 percent of very small particles.
Due to the shortage of personal protective equipment (PPE) in the U.S. at the start of the pandemic, the CDC has authorized the use of KN95 masks as a suitable alternative for N95 masks.
However, a number of hospitals and other KN95 wearers have pointed out some discrepancies in quality.
 


How Do KN95 Masks Work?
KN95 masks work similarly to N95 masks, but they aren't regulated by the same organizations.
This has led to some questions about the efficacy of KN95 masks in surgical settings.
(You can see if the FDA has approved your model of KN95 for emergency medical use by checking this list.)
In a September 2020 analysis of 200 KN95 masks from 15 manufacturers, the patient safety nonprofit ECRI found that up to 70 percent of the protective face coverings didn't meet U.S. standards for effectiveness, ''raising risks of contracting COVID-19 for care providers and patients at hospitals and other healthcare organizations that imported masks from China.''
 


How Are N95 and KN95 Masks Different?
Both N95 and KN95 masks use multiple layers of synthetic material to protect you from outside particles.
And, as their names suggest, both must filter out 95 percent of particles that are 0.3 microns in size or larger.
The main differences are the looks and regulating bodies that control the masks.
The National Institute for Occupational Safety and Health (NIOSH) regulates N95 masks, putting each mask prototype from various manufacturers through a rigorous testing process.
(You can find a list of CDC-approved N95 masks for use in surgical settings here.)
Meanwhile, the Chinese government regulates KN95 masks.


 

医用和非医用口罩有何区别？
 
口罩的N系列是 #美国标准，KN系列是 #中国标准
FFP系列是 #欧洲标准，KF系列是 #韩国标准 。
后面的数字指的 #防护能力，#越大防护等级也越高 。
95指的是能够 过滤掉超过 95% 非油性颗粒物
90系列 没有95防护 等级高
但是也能 抵抗90% 以上颗粒物
FFP系列中，2基本对应着95
3表示过滤 有效率更高，达99%。
数字结尾 带个 V ，表示有 #呼吸阀
 



二者主要区别在于 #医用类型口罩

1. 外表面经过 疏水处理，即 #血液 、#汗液等 #无法浸透 。

#如果缺乏这个防水层
前线医护人员就有双重风险
 
是口罩很 容易湿透，水分子在 成为液态后
分子之间引力加大，
相当于把口罩的屏障打穿了，
病毒就容易进入。
 

2. 是医护人员容易大概率暴露在病人的血液、体液环境中

 


防住肺炎，一定牢记佩戴方法和原则
再好的口罩，佩戴错误也没用。
因此，科学合理佩戴，规范使用，
才能帮助我们进行有效防护。
#国家卫生健康委疾病预防控制局 印发了


《预防新型冠状病毒感染的肺炎口罩使用指南》
总结出一些指导意见，也供大家借鉴：
 
1. 在非疫区空旷且通风场所不需要佩戴口罩
进入人员密集或密闭公共场所需要佩戴口罩。
 
2. 在疫情高发地区空旷且通风场所建议佩戴一次性使用医用口罩；
进入人员密集或密闭公共场所佩戴医用外科口罩或颗粒物防护口罩。
 
3. 有疑似症状到医院就诊时，
需佩戴不含呼气阀的颗粒物防护口罩或医用防护口罩。

4.棉纱口罩、海绵口罩和活性炭口罩对预防病毒感染无保护作用。

5.健康人群佩戴过的口罩，一般在口罩变形、
弄湿或弄脏导致防护性能降低时更换,按照生活垃圾分类的要求处理即可。

6.疑似病例或确诊患者佩戴的口罩，不可随意丢弃，
应视作医疗废弃物，严格按照医疗废弃物有关流程处理，不得进入流通市场。

7.在公共场合应和他人保持1m以上的距离；咳嗽、
打喷嚏时都应用纸巾、衣袖遮掩口鼻。


https://cn.chinadaily.com.cn/a/202002/08/WS5e3e8ed7a3107bb6b579e0ae.html