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被划为二类医疗器械的医用口罩,因全国大范围雾霾天气和流感频发,不少城市的口罩一度脱销。然而,杭州市中医院呼吸科副主任医师付骞指出,医用口罩并非人人能戴,尤其是太过严密的N95口罩,心血管患者不建议戴。从理论上来讲,口罩防护材料越密闭,阻挡颗粒物的效果越好;反过来说,口罩越密闭,呼吸阻力也会增加,呼吸不畅通则可能因缺氧
Was classified as two types of medical masks medical equipment, because the country a wide range of frequent haze and flu weather, many city masks once out of stock. However, deputy director of the Department of Respiratory Medicine, Hangzhou Hospital of Traditional Chinese Medicine Fu Qian pointed out that not all medical masks can be worn, especially too tight N95 masks, cardiovascular patients is not recommended to wear. In theory, the more confidential masks protective material, the better the effect of blocking particles; the other hand, the more closed mask, respiratory resistance will increase, may be due to lack of breathing may be due to lack of oxygen