My N95 respirator has an exhalation valve, is that okay?

1. My N95 respirator has an exhalation valve, is that okay?
   1. An N95 respirator with an exhalation valve does provide the same level of protection to the wearer as one that does not have a valve. The presence of an exhalation valve reduces exhalation resistance, which makes it easier to breathe (exhale). Some users feel that a respirator with an exhalation valve keeps the face cooler and reduces moisture build up inside the facepiece. However, respirators with exhalation valves should not be used in situations where a sterile field must be maintained (e.g., during an invasive procedure in an operating or procedure room) because the exhalation valve allows unfiltered exhaled air to escape into the sterile field.

 

 

https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html

 

所有跟帖： 

• 仔细看了CDC的说明，好像一般人用可以，看link: -小鸟东南飞- ♀ (166 bytes) () 02/26/2020 postreply 16:29:55

• 无菌病房里不能用，因为阀门只保护戴口罩的自己，不保护环境，把部分毒气直接排入环境 -ca981- ♂ (0 bytes) () 02/26/2020 postreply 17:47:17