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Showing posts with label filtering facepiece. Show all posts
Showing posts with label filtering facepiece. Show all posts

Thursday, October 14, 2021

Should We Be Wearing Better Masks? The Best Face Covering Is The One That Is Worn Properly & Used!

We recently read two articles in The Atlantic called "Why Are Americans Still - Still! - Wearing Cloth Masks?" and "Why Aren't We Wearing Better Masks?" and another in Scientific American called "Why We Need to Upgrade Our Face Masks - and Where to Get Them".  All three articles discuss why Americans are still wearing cloth face-coverings now that N95 respirators (or the KN95 respirators, these respirators are made in China and are not approved by the National Institute of Occupational Safety and Health (NIOSH)) are more readily available (The NIOSH Science Blog discusses the roles NIOSH, Occupational Safety and Health Administration (OSHA) and the Food and Drug Administration (FDA) play regarding respiratory protection).  The articles mention a new study not peer-reviewed yet from Bangladesh which claims that wearing surgical masks decrease COVID-19 symptoms and antibodies by 11.2 percent, while cloth masks only led to a 5 percent decrease.  It proceeds to give several reasons why we continue to use face-coverings from public-health agencies not prioritizing surgical masks and N95 respirators to price to supporting one's sports team.  Two of the articles describe how face-coverings are far better than nothing and also saying how cloth masks are more eco-friendly (The Covid Crisis Is Now a Garbage Crisis, Too) giving face-coverings a backhanded credit for helping when nothing else was available.  The articles, in my opinion, even support the notion that we should be buying KN95 respirators even though they are not approved by NIOSH.  If anything shouldn't we be buying American-made N95 respirators so we can increase the demand and hence increase the supply of masks that are made here?  This was the subject of a New York Times article "Can't Find an N95 Mask? This Company Has 30 Million That It Can't Sell" and the Washington Post article "In the early days of the pandemic, the U.S. government turned down an offer to manufacture millions of N95 masks in America."

Two suppliers of N95 respirators

Let us first say as a person, who believes in the use of respirators and their importance in protecting individuals from exposure to hazardous substances (see all our posts regarding 9/11), we agree that N95 respirators or surgical masks would protect people better from SARS-CoV-2 than cloth face-coverings if worn correctly.  However, we would need to be able to provide each person N95 respirators (in their size either small, medium, or large) or surgical masks, make sure they had a sufficient supply to meet their needs, make sure the N95 respirator fits each person, make sure they understand how to wear the N95 respirator or surgical masks correctly, and finally, they are provided a means of disposal for the respirators or the surgical masks.  As you can imagine that would be a significant cost to the government (or tax-payers) and would require a significant undertaking to make sure every American would be protected by using N95 respirators or surgical masks.  Meanwhile, the biggest issue is whether we are talking N95 respirators, surgical masks, or face coverings they must be worn correctly to protect you, and remember facial hair reduces the effectiveness of all these face coverings.  See the chart below for various ways of improperly using face coverings.  The Centers for Disease Control and Prevention (CDC) website "Types of Masks and Respirators" was updated as of September 23, 2021, and provides information on types of masks and when to wear them and now includes a section on considerations for children.


Both these articles treat surgical masks and N95 respirators as simple items to wear and that anyone can wear them.  However, this is not a fact as we mentioned above N95 respirators require medical clearance, fit testing, and training all mandated by OSHA for individuals that are required to wear them.  As for surgical masks, we have to remember the ones that are typically sold to the public aren't actually surgical masks.  Surgical masks are cleared by the FDA, see the chart below for the difference between the N95 respirators and surgical masks.  Note that surgical masks do not provide the wearer with a reliable level of protection from inhaling smaller airborne particles.  This is for FDA-cleared surgical masks, which means the ones the public purchases probably aren't reliable either considering they are not cleared by FDA.

Surgical Masks vs N95 respirators

However, the use of cloth face-coverings has been shown to reduce the emission of virus-laden droplets (source control) and help reduce inhalation of these droplets.  The CDC website "Use of Cloth Masks to Control the Spread of SARS-CoV-2" which was last updated on May 7, 2021, provides some significant research on how the use of cloth face-coverings block the transmission of respiratory droplets with some face-coverings performing on par with surgical masks as barriers for source control.  In the section "Human Studies of Masking and SARS-CoV-2 Transmission" data regarding the "real-world" effectiveness of community masking is limited to observational and epidemiological studies with many of these showing significant levels of protection from wearing face coverings.  An example of one of these was "A study of an outbreak aboard the USS Theodore Roosevelt, an environment notable for congregate living quarters and close working environments, found that use of face coverings on-board was associated with a 70% reduced risk of transmission.

Note the circled area of the package (which means they are not surgical masks). 

It is our opinion, one of the main reasons face-coverings are better is because they are easier to use, easier to breathe through, light-weight, and because of these things more likely to be used and used correctly.  Wearing the face-covering correctly and using the face covering is what is helping reduce transmission of SARS-CoV-2.  So follow the CDC guidelines on when to use face-coverings and let's stop the spread!

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Friday, September 05, 2014

September 5 is N95 Day - Whaaaaaat??

According to the National Institute of Occupational Safety and Health (NIOSH) today September 5 is N95 Day.  NIOSH says, "N95 Day is a time to recognize the importance of respiratory protection in the workplace and familiarize yourself with the resources available to help you make educated decisions when selecting and wearing a respirator."  To celebrate, NIOSH will be providing N95 filtering facepiece respirator information through social media channels such as a Twitter chat, a webinar, and new infographics.  For more information visit there website at:  http://www.cdc.gov/niosh/npptl/N95Day.html.


Interesting thing to us is why celebrate the N95 filtering facepiece respirators?  Filtering facepiece respirators have their place in protecting workers from respiratory hazards, however, that place is very limited.  This type of respirator cannot and should not be used for respirable dusts like asbestos or lead.  Nor should it be used for vapors or mists or gases.  As the picture above from Ground Zero - 9/11 World Trade Center rescue, recovery and cleanup shows, knowing which respirator to wear was one of the problems for the workers who worked there.  The picture shows workers wearing filtering facepiece respirators and half mask air purifying respirators.  Considering the contaminants (asbestos, mercury, PCBs, to name a few) at the site, filtering facepiece respirators should not have been a choice at all.  This is probably the main reason to have an N95 day is to make sure people understand the limitations of this type of respirator.  But why limit it to filtering facepiece respirators, we should be celebrating all respirators!  So for our part we say Happy Respirator Day!

Sunday, March 24, 2013

Filtering Facepiece Respirator or Dust Mask. Which is it?

Well the answer to the question in the title is similar to you saying tomatoe or tomato.  They are two ways of saying the same thing.  According to the Occupational Safety and Health Administration (OSHA) a dust mask is a filtering facepiece respirator.  For those involved in the safety and health field that is not news.  However, for everyone else it is.  In fact, we would argue that the average worker doesn't even consider the dust mask a respirator.  We recently ran into this miscommunication between an employer who was providing filtering facepiece respirators on a voluntary basis and assumed when the OSHA compliance safety and health officer was asking about respirators they were talking about the ones used in the paint booth.  Paint booth respirators were required, but the filtering facepiece respirators were not.  You could imagine the conversation.
Muster einer Atemluft-Einwegmaske
Muster einer Atemluft-Einwegmaske (Photo credit: Wikipedia)

What is the consequence of such a miscommunication?  Well once you require the wearing of filtering facepiece respirators in the workplace, these respirators must follow all the requirements of 1910.134 the OSHA respiratory protection standard.  Which means the workers must be medically cleared to wear the respirator, fit tested with the respirator to ensure it fits, and trained on the use of the respirator.  However, if the filtering facepiece respirator is being used voluntarily, all you must provide is Appendix D of standard "Information for Employees Wearing Respirators When Not Required Under The Standard."  A big difference in requirements.  So be very careful when answering this question during an OSHA workplace inspection.

Another problem with dust masks is illustrated by the photo above in an article about Suffolk County's plan to spray pesticides.  What is wrong with the picture?  Well if this worker is spraying pesticides he is wearing the wrong respirator.  Filtering facepiece respirators (dust masks) only protect from dust or particulates.  They do not protect against chemicals that are in the form of mists, vapors, or gases (which is the form that the worker in the picture is spraying).  These forms of chemicals would penetrate through the mask or worse will be absorbed into the filter and potentially concentrate the chemical or allow the chewmical to sit on worker's face.
 
The only reason for wearing a filtering facepiece respirator (dust mask) is for nuisance dusts (i.e., wood dust, pollen, grass clippings, etc.).  Though this respirator is very comfortable, and lighweight, in our view, it is very dangerous because it is readily available, many people are using it improperly, and many people believe it can do more than it was designed to do.  Use this resapirator very carefully and again only for nuisance dusts, nothing more.  Be safe out there!
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