Tag Archives: Face Shields

Dr. C "Comments", Men's Health, Prevention, Women's Health

HEALTH: ARE FACE SHIELDS THE BETTER PROTECTOR?

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From a New York Times article (May 24, 2020):

Dr. Perencevich believes that face shields should be the preferred personal protective equipment of everyone for the same reason health care workers use them. They protect the entire face, including the eyes, and prevent people from touching their faces or inadvertently exposing themselves to the coronavirus.

The debate over whether Americans should wear face masks to control coronavirus transmission has been settled. Governments and businesses now require or at least recommend them in many public settings. But as parts of the country reopen, some doctors want you to consider another layer of personal protective equipment in your daily life: clear plastic face shields.

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COMMENTARY

When I take my walk, which currently is my only outing, I wear a face SHIELD for my personal protection against contracting Covid 19 from others.

I gave up on the face MASK because it is uncomfortable, especially when I am breathing heavily while walking rapidly up hills.

There isn’t much research supporting the self-protective use of face shields, but the video accompanying this article was enough for me; notice the aerosol-free area behind the face shield.

While walking, I breathe In deeply through my nose, and exhale through my mouth, using “pursed lips”, which aids in oxygen extraction by holding the alveolae open.

Exhaling through the mouth also clears the air behind the mask for subsequent nasal inhalation.

With nasal inspiration, any SARS CoV-2 aerosol particles would be deposited in the nasal passages, Which are that much farther away from your vulnerable lung.

It isn’t perfect. For one thing, it wouldn’t protect you much if someone coughed at you from the side or behind. I often hold my breath reflexes when I hear someone cough, or when I pass closely (even 6ft.) to someone.

The face shield holds promise for protecting you from viral infection, including the “flu”.

—Dr. C.

Men's Health, Opinion, Prevention, Women's Health

OPINION: FACE MASKS AND SHIELDS TO PREVENT COVID

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My main exercise for the day is a 45 minute fast walk around my community.

Hat – check. Sunglasses – check, FACE SHIELD – check.

Yes, face shield. The shield has the advantage of allowing me to talk, plus being more comfortable to wear. I clean it with a woolen cloth on one side and cotton on the other, hoping for a condenser electrostatic effect (I’m open to suggestion from engineers).

If I cough, any large particles of mucus would impact the shield, leaving only tiny aerosol particles to escape around the edges into the environment to endanger others.

It is Saturday today, and I pass a man and a woman pushing a baby buggy, and give them wide berth. I don’t consider 6-feet far enough distancing. 12-18 feet would be better, since, at 88-years of age, I am at least 2-3 times more susceptible.

A 12-year old zooms by me on a scooter. His age predicts less viral effluent, and the exposure time is less. I then go by a large collection of 20-year olds, Wide berth again, and, holding my breath, continuing to walk fast.

As I walk, I breathe air in through my nose, and out through my mouth. I feel the warmth (and purity) of the exhaled air, which may push aside and dilute any contaminants coming from the outside.

Another group of young adults! Well, maybe the risk is not as bad as the numbers would indicate. Odds are there would be only one spreader in the group, and the healthy ones would act as particle filters for me.

So far, not a single young person had a mask on. They are probably just thoughtless young people, and not necessarily “objectors” believing that mask-wearing is a sign of submission. As Peggy Noonan said in her column in today’s WSJ:

“…IT’S A SIGN OF RESPECT, RESPONSIBILTY AND ECONOMIC ENCOURAGEMENT”.

Going forward, we must all do our part to reduce the likelihood of another Covid surge. WEARING A MASK PROTECTS OTHERS.

I finally spied 2 masks! They were fitted on 2 ceramic lions flanking a front door. It is true that felines can catch Covid. But ceramic ones?

I thought I was walking fast, but was overtaken from the rear by a long-legged young lady. She passed within 4 feet of me, and of course had no mask on. I only hope she didn’t have Covid, and that my shield worked.

On the subject of the effectiveness of wearing a shield, while walking I tune into the odors along the way. I use the odors as surrogate aerosols, especially a recently fertilized curbside flower bed, I compare walking by the flowers, with and without my face shield, and find that the shield reduces but does not eliminate the odor. For more distant odors, like a barbecue, it does not make a difference.

Perhaps the shield, like the prow of a ship, pushes aside STREAMS of particle-laden air. Like coughing or talking nearby. But if the particles (yes, odors are nanometer particles) are well mixed with the air, there is no effect. Air must be breathed, after all.

There are a couple of other things I practice on my walk. I exercise my EYES by looking into the DISTANCE as much as possible. I try to walk as erect as I can. Gravity, my friend in grounding many big Covid-containing mucus particles, tries to bend me over.

The BOTTOM LINE, until more information is available), is: SPREADERS WEAR MASKS, SUSCEPTIBLES  WEAR SHIELDS. Of course, hand-washing, social-distancing, coughing into your elbow, and staying at home, especially if sick, are all still important admonitions.,

-Dr. C.

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