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facemask instructions COVID-19.doc

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Home-Made Face Mask Design
Studies in 2008 by Public Health England evaluated a range of household materials
that, in the event of a pandemic, could be used by members of the general public to
make individual facemasks.
These studies found that t-shirts and pillow cases made into a facemask using the
design detailed below may act as a barrier against influenza, or to limit spread by a
person with symptoms (we have no data on SARS-CoV-2 but it’s not unreasonable to
assume similarity).
It is important to stress, however, that the wearing of facemasks will only offer
limited protection, and should not be considered sufficient protection. Additional
preventative measures need to be adopted. These are detailed below:
1) Avoid close contact with people who appear unwell and who have fever and
cough.
2) Cover your nose and mouth when coughing or sneezing, using a tissue when
possible and disposing of it promptly.
3) It is also important to wash your hands frequently with soap and water to
reduce the spread of the virus from your hands to face or to other people and
cleaning hard surfaces like door handles frequently using a normal cleaning
product.
4) If caring for someone with a flu-like illness, a mask may be worn to cover the
nose and mouth to reduce the risk of transmission. The UK is looking at
increasing its stockpile of masks for healthcare workers for this reason.
Please read all instructions before beginning
Supplies:
Two clean 100% cotton washed t-shirts in contrasting colours. (These can be obtained
at relatively low cost from many retailers- Tip: Get a large sized t-shirt for extra
material!). Using two colours will make it easier to remember which side of the mask
is facing outwards and which is facing inwards so that you do not self-contaminate by
putting the mask on back to front. However, if you wish to make the mask using one
piece of material, we suggest that you mark the fabric in some way.
Scissors
Pencil/ Yellow marker pen
1.10m elastic
Needle + thread / sewing machine (preferable)
Cutting:
Cut out the template attached to this document and place it on a single layer of the t-
shirt. Use the pencil to draw around the template so that when you remove it, you
have a guide as to where to cut. Cut around the rectangle. Repeat this with the other
coloured t-shirt.
Step 1:
Place the two rectangles on top of each other. If there is a significant difference
between the appearance of the inside and outside of the material, place the softer sides
facing each other.
Step 2:
Either with a needle and thread or with a sewing machine stitch the two rectangles
together at each end as shown on the template by seam A
Step 3:
You will now have a rectangle of fabric that is stiched at either end to form a loop.
Turn this inside out, so that the edges at each end are neatly sewn together and the
stitching is less visible. Iron the seams flat-this makes the next step easier.
Step 4: Again, using either a sewing machine or a needle and thread, sew the fabric
together at either end where indicated by Seam B. This will create two ‘tubes’ at either
end of the mask.
Step 5: Cut the elastic in half, creating two lengths, each approximately 55cm in
length. Each length should be long enough to go around your head from the bridge of
your nose to the back of your head. Tie a loose knot at one end of the elastic to help
feed it through the tube. Do the same for the other tube. Once the elastic has been fed
through there should be an equal length visible either side of the mask.
Step 6:
Pleating and folding: Fold the fabric as shown in the template: fold the uneven dashed
lines backwards, and the evenly dashed line forward (may re-word/design this-image
needed!). It may help to indicate on the fabric where the folds should roughly be. Iron
the pleats flat. (This is where a paper version suggested below may be of assistance).
Helpful hint: Fold the paper template first to calculate how the pleats should be
made.
Step 7:
Pin the fabric with the pleats folded at either side of the mask, and at either side where
the hard line indicates to hold the pleats in place. The length now on either side should
be about 2/3 the original length of the mask. Iron the pleats flat and sew on either side,
indicated on the template by seam C.
Step 8. The mask is nearly finished. Place the mask so that it sits on the bridge of
your nose and under your chin. You may need some one to help you with this part.
Hold the elastic at the back of your head at a comfortable length so that it keeps the
mask on. It should be comfortable: not so tight that the elastic digs in, but not so loose
that the mask does not stay in place. Mark the correct length and stitch the together
the ends of the elastic to finish the mask.
IMPORTANT: Remember to always wear your facemask in the same orientation, i.e.
you should always have the same side facing outwards (the contaminated side).
Different colours used should help with this. Facemasks should be machine-washed
frequently to eliminate any residual flu particles which may be contaminating the
outside of the mask. Remove your mask by taking the straps from the back of your
head and pull forward-do not touch the material part of the mask. If you do, please
remember to wash your hands with soap and water before and after you touch your
mask.

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... Previous studies of fitted filtration efficiency for medical and non-medical masks have been limited by very small sample sizes and incomplete descriptions of the masks. For cloth masks, our data (47-55%) are in keeping with the higher end of reported fitted filtration efficiencies: 27% (3-ply cotton on earloops, 0.02-3µm particles, 1 participant, 4 replicates) 5 ; 28% (2-ply, 3ply and 4-ply polyester, cotton and poly-cotton masks on earloops, 0.1µm particles; 3-4 participants, 1 replicate) 50 ; 50% (2-ply cotton T-shirt fabric, on overhead elastic ties, <0.1µm particles, 21 participants, 1 replicate) [51][52][53] ; 52% (head attachments and material not reported, 5 designs including 1-ply and bandana fabric, <0.1µm particles, 3 participants, 1 replicate). 42 This . ...
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Importance Masks reduce transmission of SARS-CoV2 and other respiratory pathogens. Comparative studies of the fitted filtration efficiency of different types of masks of are few. Objective To describe the fitted filtration efficiency against small aerosols (0.02 – 1 µm) of medical and non-medical masks and respirators when worn, and how this is affected by user modifications (hacks) and by overmasking with a cloth mask. Design We tested a 2-layer woven-cotton cloth mask of a consensus design, ASTM-certified level 1 and level 3 masks, a non-certified mask, KF94s, KN95s, an N95 and a CaN99. Setting Closed rooms with ambient particles supplemented by salt particles. Participants 12 total participants; 21 – 55 years, 68% female, 77% white, NIOSH 1 to 10. Main Outcome and Measure Using standard methods and a PortaCount 8038, we counted 0.02–1µm particles inside and outside masks and respirators, expressing results as the percentage filtered by each mask. We also studied level 1 and level 3 masks with earguards, scrub caps, the knot-and-tuck method, and the effects of braces or overmasking with a cloth mask. Results Filtration efficiency for the cloth mask was 47-55%, for level 1 masks 52-60%, for level 3 masks 60-77%. A non-certified KN95 look-alike, two KF94s, and three KN95s filtered 57-77%, and the N95 and CaN99 97-98% without fit testing. External braces and overmasking with a well-fitting cloth mask increased filtration, but earguards, scrub caps, and the knot-and-tuck method did not. Limitations Limited number of masks of each type sampled; no adjustment for multiple comparisons. Conclusions and Relevance Well-fitting 2-layer cotton masks filter in the same range as level 1 masks when worn: around 50%. Level 3 masks and KN95s/KF94s filter around 70%. External braces or overmasking with a cloth-mask-on-ties produced filtration around 90%. Only N95s and CaN99s, both of which have overhead elastic, performed close to the occupational health and safety standards for fit tested PPE (>99%), filtering at 97-99%, without fit testing. These findings inform public health messaging about relative protection from aerosols from different mask types and increase understanding of findings of studies of implementation of masks and respirators. Key Points Question: How well do medical and non-medical masks filter aerosols when worn? Findings: Well-fitting 2-layer cotton masks, and level 1 medical masks were similar, both filtering around 50% of aerosols. Level 3 masks and KN95/KF94s were similar, filtering around 70%. N95s and CaN99s, without formal fit testing, filtered 97-98%. Meaning: Level 1 medical masks were not better than the well-fitting 2-layer cotton masks we tested. KN95/KF94s are not as efficient, when worn, as N95s and CaN99s. Overmasking and the use of external braces improve filtration: these are potentially useful strategies when N95s are not available. Abstract Figure
... O estudo evidenciou, ainda, que o uso de duas camadas representou aumento significante na filtração apenas para o tecido de toalhas. Assim, o estudo concluiu que máscaras caseiras devem ser as últimas opções para evitar a transmissão de doenças respiratórias, mas que o uso, apesar dos limites de proteção, é melhor que não usar nenhuma proteção 43 43 , frente a essa pandemia da COVID-19, publicaram alguns informes no site da Research Gates para confeccionar máscaras, recomendando tecido de algodão 100%, empregado para produzir camisetas, em duas camadas, incluindo um molde para essas máscaras, que foi desenhado a partir do modelo das máscaras cirúrgicas [44][45][46] . Em outro informe, estes autores organizaram as perguntas mais frequentes durante esse tempo sobre máscaras caseiras e responderam, esclarecendo sobre a forma de produção de máscaras caseiras de tecido, ressaltando que elas não representam uma proteção completa contra a transmissão do vírus, mas podem ajudar como uma barreira 47 . ...
Article
Com a pandemia da COVID-19, causada pelo vírus SARS-Cov-2, o uso de máscaras para evitar transmissão tornou-se imprescindível em todo mundo, preconizado como medida essencial para proteção, em conjunto as condutas de higienização das mãos e distanciamento social. As máscaras ideais, que fornecem maior proteção, são denominadas N95 e PFF2; já as máscaras cirúrgicas, mais utilizadas e conhecidas, têm faixas variáveis de proteção dependendo dos fornecedores. Em função da alta demanda mundial e necessidade de priorizar as máscaras de proteção e cirúrgicas aos profissionais que atuam na linha de frente no combate a pandemia, as autoridades de saúde mundialmente estimulam o uso de máscaras de tecido, também denominadas máscaras caseiras, que são produzidas artesanalmente, surgindo questionamentos da validade ou não do uso na prevenção da COVID-19. Assim, este trabalho objetivou revisar os estudos na temática, constatando que há opiniões divergentes de pesquisadores quando a eficiência desse utensílio, mas há metodologias capazes de avaliar o potencial desses utensílios, demonstrando que a eficácia está condicionada a qualidade dos materiais e técnica de confecção empregada, passível de obtenção de máscaras de tecidos com benefício na contenção dessa infecção. Assim, o trabalho disponibiliza orientações para confecção e manejo dessas máscaras; concluindo que uso de máscaras adequadas de tecidos pode representar ferramenta de grande utilidade na prevenção da COVID-19. ABSTRACTWith the pandemic of COVID-19, caused by the SARS-Cov-2 virus, the use of masks to prevent transmission has become essential worldwide, recommended as an essential measure for protection, together with hand hygiene and social distance. The ideal masks, which provide greater protection, are called N95 and PFF2; the surgical masks, more used and known, have variable protection bands depending on the suppliers. Due to the high global demand and the need to prioritize protective and surgical masks for professionals working on the front lines in the fight against the pandemic, health authorities worldwide encourage the use of fabric masks, also called homemade masks, which are produced handcrafted, raising questions about the validity or not of use in the prevention of COVID-19. Thus, this study aimed to review the studies on the theme, noting that there are divergent opinions from researchers when the efficiency of this tool, but there are methodologies capable of evaluating the potential of these tools, demonstrating that the effectiveness is conditioned to the quality of the materials and the cooking technique employed, capable of obtaining tissue masks with benefit in containing this infection. Thus, the work provides guidelines for making and handling these masks; concluding that the use of appropriate fabric masks can represent a very useful tool in the prevention of COVID-19.Keywords: SARS-CoV-2; homemade masks; efficiency; confection. RESUMENCon la pandemia de COVID-19, provocada por el virus SARSCov-2, el uso de mascarillas para prevenir la transmisión se ha vuelto imprescindible a nivel mundial, recomendado como medida imprescindible de protección, junto con la higiene de manos y el distanciamiento social. Las máscaras ideales, que brindan mayor protección, se denominan N95 y PFF2; las mascarillas quirúrgicas, más utilizadas y conocidas, tienen bandas de protección variables según los proveedores. Debido a la alta demanda mundial y la necesidad de priorizar las mascarillas protectoras y quirúrgicas para los profesionales que trabajan en primera línea en la lucha contra la pandemia, las autoridades sanitarias de todo el mundo fomentan el uso de mascarillas de tela, también llamadas mascarillas caseras, que se producen de forma artesanal. planteando dudas sobre la validez o no del uso en la prevención de COVID-19. Así, este trabajo tuvo como objetivo revisar los estudios sobre el tema, notando que existen opiniones divergentes de los investigadores a la hora de la eficiencia de este utensilio, pero existen metodologías capaces de evaluar el potencial de estos utensilios, demostrando que la efectividad está condicionada a la calidad. de los materiales y la técnica de cocción empleada., capaz de obtener mascarillas de tejido con beneficio para contener esta infección. Por lo tanto, el trabajo proporciona pautas para la fabricación y manipulación de estas máscaras; concluyendo que el uso de máscaras de tela adecuadas puede representar una herramienta muy útil en la prevención de COVID-19.Palabras Clave: SARS-CoV-2; Máscaras caseras; Eficiencia; Confección.
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