\n\n
支气管哮喘是一种慢性炎症性疾病,由多种炎症细胞及细胞组分参与,常伴随引起气道反应性增高,导致反复发作的喘息、气促、胸闷和(或)咳嗽等症状,多在夜间和(或)凌晨发生,此类症状常伴有广泛而多变的气流阻塞,可以自行或通过治疗而逆转。
\n\n而慢性喘息性支气管炎是指气管、支气管粘膜及其周围组织的慢性非特异性炎症,以长期咯、咳痰或伴有喘息及反复发作为特征。慢性咳嗽、咳痰或伴有喘息,每年发作持续 3 个月,连续 2 年或以上,并能排除心、肺其他疾患而反复发作可诊断为支气管炎。临床上又可分为单纯型和喘息型两个类型。
\n\n喘息性支气管炎和支气管哮喘之间究竟有哪些不同特点可加以区别呢?
\n\n主要包括有以下几个方面:
\n\n从发病年龄看,支气管哮喘病人多年幼或青年时发病,约 1/5 的病人有本病的家族史,慢性喘息性支气管炎的人群患病率 4%,多发于中老年人,50 岁以上可高达 13%。
\n\n北方较南方高,农村比城市多,山区高于平原,个别地区高达20%,没有家族史,但部分患者有长期吸烟史或长期使用生物燃料的经历。
\n\n从发病季节与发作特点看,支气管哮喘根据不同类型发病时间有自身特点,比如花粉过敏引起的哮喘在花粉季节发病;感染引起的哮喘多加重于气候多变季节;运动性哮喘发生于运动后;月经性哮喘发病与月经周期密切相关等等。
\n\n典型哮喘的喘息特点是突然发作,突然缓解,发作时肺部布满哮鸣音,间歇期即不发作时没有咳嗽、咳痰症状,如正常人一样。
\n\n而慢性喘息性支气管炎一般在秋冬季节或感冒时加重,以反复的急性加重为主要表现。发作缓解后,仍有一个长期慢性的咳嗽、喘、咳痰的表现。
\n\n再从临床症状看,支气管哮喘一般没有慢性的咳嗽、咳痰病史,而以喘息为主耍特征。伴发的咳痰较轻。
\n\n而慢性喘息性支气管炎则多在咳嗽,咳痰若干年之后才伴发喘息,而且咳痰较重。多半在上呼吸道感染后加剧。
\n\n病情发作时的体征两者也有差别,支气管哮喘以双肺布满哮鸣音为主;而慢性喘息性支气管炎肺部除了哮鸣音外,常有湿性啰音。
\n\n从辅助检查上来说,支气管哮喘非重症发作时通常患者因过度通气而导致呼吸性碱中毒,影像学上也呈现两肺过度充气的特征,而慢性喘息性支气管炎患者则因病程迁延和肺功能损害,可出现呼吸性酸中毒伴有二氧化碳储留,胸部影像学上通常也会夹杂肺纹理增多紊乱甚至肺气肿肺大泡等慢性改变。
\n\n最后,从对药物的反应来说,支气管解痉药物对支气管哮喘疗效显著,肺功能能得到明显改善。
\n\n而慢性喘息性支气管炎在急性发作时,往往需联合抗感染、祛痰等综合治疗手段,使用支气管扩张剂后肺功能提高不明显。
\n\n了解了以上支气管哮喘和喘息性慢性支气管炎各自的特点,希望大家能对这两种疾病的自我鉴别有初步的认识,配合医生一起做好疾病的预防和治疗。
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