Useful in pandemic era For protection against infection

1. MASK
YOUR PROTECTING GEAR
Dr. Toral Desai
Assistant Professor
Shree Ramkrishna Institute of Computer Education and Applied Sciences, Surat

2. What is Mask?
• A cover or partial cover for the face used for
disguise
• A physical barrier between the mouth and nose
of the wearer and potential contaminants in the
immediate environment
• Personal protective equipment that are used to
protect the wearer from airborne particles and
from liquid contaminating the face (FDA)

3. Face
protector
Mask
Basic cloth
face mask
Surgical
face mask
Respirator
Filtering
facepiece
N95 K95 P100

4. Other than these:
• Self-contained breathing apparatus
• Full face respirator
• Full length face shield
• Powered air-purifying respirators (PAPRs)
with HEPA filters (high-efficiency particulate
air filters)
• An ultra-low penetrating air filter (ULPA)

5. Basic cloth face mask (Community mask)
• Standard, everyday version of a face mask
• Made from various types of material-cotton,
sponge, nonwoven material, khadi etc.
• May be two or three ply
• One can wear this type of face mask while
going to any open public place
• Better than having nothing on hand to fight
the spread of germs, especially during a
pandemic situation

6. • Cloth and sponge masks filter out about 50% of
bacteria and dust pollutants
• How effectively they work in fighting viruses is still
under study
• Version recommended for public use in the midst of
COVID-19

7. Surgical Face Mask (medical face mask or
procedure mask)
• Disposable device-not intended to be used more than once
• Covers not just their nose and mouth, but also their cheeks
• Block large-particle droplets, splashes, sprays, or splatter
that may contain germs (viruses and bacteria)
• Surgical masks may also help reduce exposure of your
saliva and respiratory secretions to others
• Do not provide complete protection from germs and other
contaminants because of the loose fit between the surface
of the mask and your face

9. Respirator
• A personal protective device that is worn on the face or head
and covers at least the nose and mouth
• Used to reduce the wearer’s risk of inhaling hazardous
airborne particles, gases or vapours
• Respirators, including those intended for use in healthcare
settings, are certified by the health care agencies
• Respirators that filter out at least 95% of airborne particles
during “worse case” testing using a “most-penetrating”
sized particle are given a 95 rating
• That filter out at least 99% receive a “99” rating
• That filter at least 99.97% (essentially 100%) receive a
“100” rating

10. • Rated as N, R, or P for protection against oils
• Rated “N,” if they are Not resistant to oil
• “R” if somewhat Resistant to oil
• “P” if strongly resistant (oil Proof)
• Nine types of disposable particulate respirators:
• N-95, N-99, and N-100
• R-95, R-99, and R-100
• P-95, P-99, and P-100

11. N95 Respirator
• Blocks at least 95 % of very small (0.3
micron) test particles (roughly the size of a
single virus)
• Disposable particulate respirators
• Protect only against particles—not gases or
vapours
• Biological agents such as bacteria or viruses
are particles, they can be filtered
• Designed to achieve a very close facial fit and
very efficient filtration of airborne particles

12. • Edges of the respirator are designed to form a
seal around the nose and mouth (Can generate
negative pressure)
• Some models have exhalation valves that can
make breathing out easier and help reduce heat
build-up
• N95 respirators are not designed for children
or people with facial hair
• Consists of multiple layers of nonwoven
fabric, often made from polypropylene (Five
layers)

14. KN95 respirator (Chinese standard)
• Very similar to N95 masks
• Both capture about 95% of particles in the air
Full length face shield
A flimsier, plastic version of the glass
Covers the entire face from forehead to chin and
secures with a cushioned headband

15. Self-contained breathing apparatus
Full face respirator

16. Gas mask:
A gas mask is a mask used to protect the wearer
from inhaling airborne pollutants and toxic gases

17. Appropriate use of face masks is important
• Should completely cover the face from the bridge of
the nose down to the chin
• Clean hands with soap and water or alcohol-based
hand sanitizer before putting on and taking off the
face mask
• Remove it from behind, avoiding to touch the front
side
• Dispose the face mask safely if it is disposable in
closed container
• Wash your hands or apply alcohol-based hand
sanitizer immediately after removing the face mask
• Washable, reusable face should be washed as soon as
possible after each use, using common detergent at 60
°C

18. Likely disadvantages of using masks
• Risk of self contamination
• Headache and/or breathing difficulties
• Increased chances of facial skin lesions
• Difficulty communicating for deaf persons
• A false sense of security
• Poor compliance with mask wearing
• Waste management issues

19. Sources:
1. https://www.osha.gov
2. https://www.fda.gov
3. https://www.cdc.gov

20. Stay Safe
Stay Healthy
Stay Beautiful