McLure H A, Mannam M, Talboys C A, Azadian B S, Yentis S M
Magill Department of Anaesthetics, Chelsea & Westminster Hospital, London, UK.
Anaesthesia. 2000 Feb;55(2):173-6. doi: 10.1046/j.1365-2044.2000.055002173.x.
Surgical face masks prevent the dispersal of bacteria from the upper airway to surfaces immediately in front of and below the face during talking. However, mask wiggling has been reported to increase dermabrasion and bacterial contamination of surfaces immediately below the face. Facial hair and recent shaving may alter the quantity of particles shed by dermabrasion when the mask is wiggled. We investigated the effect of mask wiggling in 10 bearded and 10 clean-shaven male subjects, and 10 female subjects. Wiggling the mask significantly increased the degree of bacterial shedding onto agar plates 15 cm below the lips in bearded males (p = 0.03) and females (p = 0.03), but not in clean-shaven males. At rest without mask wiggling the bearded subjects shed significantly more bacteria than clean-shaven males (p = 0.01) or females (p = 0.001). To reduce the risks of contamination of the sterile field when face masks are worn females and bearded males should avoid wiggling the face mask. Bearded males may also consider removing their beards.
外科口罩可防止在说话时细菌从上呼吸道扩散到面部正前方和下方的表面。然而，据报道，口罩晃动会增加面部正下方表面的皮肤磨损和细菌污染。当口罩晃动时，面部毛发和近期剃须可能会改变皮肤磨损所脱落颗粒的数量。我们对10名留胡须男性、10名剃须男性和10名女性受试者进行了口罩晃动影响的研究。晃动口罩显著增加了留胡须男性（p = 0.03）和女性（p = 0.03）嘴唇下方15厘米处琼脂平板上的细菌脱落程度，但剃须男性未出现这种情况。在不晃动口罩的静止状态下，留胡须受试者比剃须男性（p = 0.01）和女性（p = 0.001）脱落的细菌明显更多。为降低佩戴口罩时无菌区域被污染的风险，女性和留胡须男性应避免晃动口罩。留胡须男性也可考虑剃掉胡须。
