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Surgical mask : ウィキペディア英語版
Surgical mask

A surgical mask, also known as a procedure mask, is intended to be worn by health professionals during surgery and during nursing〔(Procedure mask. )〕 to catch the bacteria shed in liquid droplets and aerosols from the wearer's mouth and nose. Its first recorded use was by the French surgeon Paul Berger during an 1897 operation in Paris.
Surgical masks are also popularly worn by the general public in East Asian countries to reduce the chance of spreading airborne diseases; in Japan, it is common to wear a face mask whilst ill to avoid infecting others in public settings. Surgical masks were widely used in China, Hong Kong, Vietnam, and Toronto, Canada during outbreaks of the SARS virus, during the 2007 bird flu pandemic in Japan, and in the United States and Mexico City during the 2009 flu pandemic featuring swine flu and the H1N1 virus. They are also worn by people in dusty environments such as sanitation workers.
In higher risk environments, N95 or NIOSH masks may be used in place of surgical masks as they provide better protection due to their shape and securing straps.

Modern surgical masks are made from paper or other non-woven material and should be discarded after each use.
==Usage==

Simple surgical masks protect wearers from being splashed in the mouth with body fluids and to prevent transmission of body fluids from the medical professional to the patient. They also remind wearers not to touch their mouth or nose, which could otherwise transfer viruses and bacteria after having touched a contaminated surface (fomite). They can also reduce the spread of infectious liquid droplets (carrying bacteria or viruses) that are created when the wearer coughs or sneezes. They are not designed to protect the wearer from inhaling airborne bacteria or virus particles. They will trap some particles but are less effective than respirators, which are designed for this purpose.
Evidence supports their effectiveness in reducing the risk of infection among other healthcare workers and in the community.
Safety guidelines for healthcare workers recommend the wearing of a face-fit tested respirator mask conforming to United States standard NIOSH N95 or European standard EN 149 FFP3 in the vicinity of pandemic-flu patients, to reduce the exposure of the wearer to potentially infectious aerosols and airborne liquid droplets.〔(【引用サイトリンク】title=Interim guidance on planning for the use of surgical masks and respirators in health care settings during an influenza pandemic )〕〔(【引用サイトリンク】title=Working with highly pathogenic avian influenza virus )
CDC provides additional information on manufacturers' products, as well as the importance of correct fitting of such masks (respirators). A printable factsheet has been designed for issue to those unaccustomed to respirator use.〔(【引用サイトリンク】title=N95 Factsheet )
In community settings, according to the U. S. Centers for Disease Control and Prevention (CDC) in its guidance regarding the 2009 swine flu outbreak, the use of facemask must be coupled with other measures such as avoiding close contact and maintaining good hand hygiene to reduce the risk of getting influenza.〔
Cotton and gauze masks are also available but they do not serve as surgical masks as they do not offer adequate filtration of microbes. Some people wear these over a normal surgical mask as they often feature patterns and designs that are more attractive and fashionable.
* Cryptomeria japonica discharges a large amount of pollen in spring. To prevent allergic rhinitis with the pollen of Cryptomeria japonica, the mask is multiused in Japan.
* In Japan and Taiwan, it is common to see these masks worn while ill, as a show of consideration for others and social responsibility.〔(【引用サイトリンク】title=For allergy season, Japan turns to surgical masks )

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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