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哮喘(反應性氣道疾病)是一種慢性疾病,由於支氣管(肺中只要的氣體通道)炎症導致呼吸受限。哮喘影響3%至5%的成年人以及7%至10%的兒童。嚴重的哮喘發作導致每年死亡人數數以萬計。 哮喘患者肺部氣道內發生三種變化:第一個變化是炎症或腫脹,由此氣道發炎並產生濃痰。然後,炎症導致氣道周圍的肌肉收縮,導致氣道變窄。這種變窄也稱為支氣管痙攣。第三個變化是氣道敏感度增加,導致氣喘患者對動物皮屑、花粉、冷空氣和煙草煙霧等等過於敏感。 哮喘患者需要與醫生配合,共同制定出藥物行動計畫,以控制症狀並最大限度地減少疾病發作。
Duration: 01:14
Published: 3/9/2017
Blausen Medical
Scientific and Medical Animations
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