Main Question or Discussion Point
This is an ER doctor in New York with a respirator with cartridges.
Due to shortages of the N95. There are hundreds of doctors in my country using them too. I even bought one. But I noticed something dangerous. The exhalation valve has only a thin rubber flap that moves when you talk or exhale (see pictures below). If the person wearing it is COVID-19 positive, can he/she spread the virus in the ER to the patients without covid?
I actually discussed this with a brain surgeon who was also using it. Then she realized only a thin flap stands the way between the wearer and outside, and there is not even any filter. There are hundreds of others who may not be aware of this.
I'd like to confirm it with people familiar with this. Can the exhalation valve of this indeed let out viruses from the wearer? If it really can. I will warn the hundreds of doctors and frontliners using it in my country. They may be releasing more viruses into other patients.
This is the breakdown of the units:
The small thin rubber flap at center above moves out when you speak or exhale inside the respirator. What if the wearer is covid positive and exhale or cough out? Can the virus be released directly into the lying patient below the doctor or frontliners (like below actual) wearing it?