2022/1/23  
Wear two masks or tie mask strings in a knot to maximize efficiency: doctor (2022/01/14)
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  • 英文 English 
    Wear two masks or tie mask strings in a knot to maximize efficiency: doctor (2022/01/14)

    As COVID cases spread in Taiwan, and the omicron variant proliferates abroad, COVID safety is a top priority. The U.S. CDC has indicated that the public might want to wear medical-grade N95 masks in daily life. We spoke to a Taiwanese doctor and pulmonary expert to get the lowdown in a Taiwanese context.

    With omicron sweeping the globe, reports suggest the U.S. CDC may advise citizens to upgrade their face masks. The pandemic is heating up in Taiwan too. Many are concerned about the more highly transmissible variant.

    Dr. Huang Hsuan
    Pulmonary and Critical Care Specialist
    For most people, wearing an N95 mask for a long time is extremely uncomfortable. Wear two masks. The inner layer must be a medical mask, the outer layer must be a cloth mask. That will stop 96.4% of viruses spread by aerosol transmission.

    Pulmonary and Critical Care specialist Dr. Huang Hsuan黃軒 says he thinks that N95 masks in Taiwan should still be reserved for medical workers. But by taking some extra steps, the average citizen can improve the effectiveness of a normal mask. Wearing two different types of mask layered upon one another, first medical, then cloth, is his suggestion. It will create a tighter seal, but also last longer than an N95 mask. But the medical mask must be the inner layer, he warns, or it won’t work.

    Dr. Huang Hsuan
    Pulmonary and Critical Care Specialist
    You can’t use two of the same type of mask. That will have no effect on the tightness of the seal. It will leak air in the same places.

    Dr. Huang warns that people with suppressed immune systems or cardiovascular diseases should not wear multiple masks. Instead, think about following this U.S. CDC demo for how to tie your mask.

    By tying the strings in a knot, you pull the mask closer to your face. Or you can use a frame like this one, to fix the mask closer to your face.

    Both these methods are approved by the U.S. CDC, which says they reduce aerosol transmission.

    If you don’t have a medical mask available, Taiwanese manufacturers have now produced a 3D mask with the same specs of N95. But unlike an N95, it can be folded up, and then opened with a simple wave, reducing the need to touch its surface.

    Chen Yen-chua
    Mask manufacturer
    It's the same grade as an N95 or an FFP2, and is extremely close-fitting. It contains your whole face from below your eye to your cheeks and chin.

    But no matter what type of mask you opt for…

    The key is to get it to fit as close to your face as you can. Keeping it on as much as possible is the No. 1 way to improve your COVID precautions.
    中文 Chinese  
    學起來! 口罩繩打結.戴雙層媲美N95防護力

    美國疫情持續延燒,美國CDC考慮建議民眾配戴高等級口罩,美國一盒50個N95口罩,去年初23美元,現在飆漲到57美元。Omicron肆虐全球,疫情也燒進台灣。但醫師黃軒建議大家都戴N95,,提醒善用現有的口罩,也能達到跟N95一樣的效果,先戴醫療口罩再戴一布口罩,或是在醫療口罩打結,都可以提高密合度。

    Omicron席捲全球,傳出美國CDC考慮建議民眾配戴高等級的口罩。台灣現在疫情也升溫,民眾拉高警覺心。

    [[胸腔暨重症專科醫師 黃軒]]
    “N95大部分的人戴久了,就非常的不舒服。兩層口罩,第一層,裡面的內用那一層一定要是醫療口罩,外面那一層一定是要布口罩。阻擋了96.4%左右的氣溶膠傳播的病毒。”

    胸腔科醫師黃軒在臉書分享,認為以台灣來說,N95還是先保留給防疫、醫護人員,現有的口罩加上幾個技巧配合,不一定要用到N95。例如使用2層不同種類口罩,內層醫療口罩、外層布口罩。但提醒戴錯順序無效,主要是改善密合度,而且還比N95更耐戴。

    [[胸腔暨重症專科醫師 黃軒]]
    “(戴兩層)不可以用同類種的口罩,它的密合度是一模一樣,它漏氣的地方也是一模一樣。”

    醫師還提醒,免疫力低下,心肺患者不適合戴多層口罩。可以參考美國CDC拍攝的影片,將掛繩打結。

    打結後的口罩,更服貼臉部,或者是加裝罩在口罩外的固定器。

    這兩種方法都是美國CDC認可,有效降低氣溶膠傳播的方法。

    如果手邊沒有N95口罩,現在台灣廠商也研發出,與N95同等級的立體口罩,而且相較於傳統碗型N95,可以折疊式的,輕輕一拉就可撐開,大幅減少接觸面積。

    [[立體口罩業者 陳妍妡]]
    “跟N95和FFP2是同等級的,密合度比較高,它從眼部以下把你的臉頰兩側、下巴全部都包覆住。”

    無論是戴哪種,或是戴幾層,重點與臉的密合度,還有要一直戴得住,有沒有戴好、戴滿、戴緊,才是防疫關鍵。
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