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鼻腔是呼吸道的门户,鼻腔粘膜有丰富的血液循环,并有粘液腺分泌粘液,故具有清洁及消毒作用,其滤尘效能为吸入空气中灰尘总量的30～50%。吸入各种工业粉尘,尤其是含游离二氧化矽较高的无机粉尘,长期刺激鼻腔粘膜均可发生毛细血管扩张、粘膜红肿、肥厚、腺体分泌亢进,继而干燥及萎缩,导致鼻炎的发生。按其粘膜的病理表现,可分为单纯性、肥厚性、干燥性和萎缩性鼻炎,其中又
Nasal cavity is the gateway to the respiratory tract, nasal mucosa is rich in blood circulation, and mucus secretion of mucus glands, it has a cleaning and disinfection, the filter efficiency of inhalation of dust in the air the total amount of 30 to 50%. Inhalation of various industrial dusts, especially high inorganic dust containing free silicon dioxide, long-term stimulation of nasal mucosa may occur telangiectasia, mucosal swelling, hypertrophy, glandular secretion hyperthyroidism, followed by drying and atrophy, leading to the occurrence of rhinitis. According to the mucosal pathological manifestations, can be divided into simple, hypertrophic, dry and atrophic rhinitis, which in turn