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1959年,英国内科医生小组提出:凡有肺泡扩大,无论是否伴有肺组织的破坏均可列为肺气肿范畴。随后,世界卫生组织、美国胸科学会又将肺气肿定义为部分或全部肺泡扩大伴有呼吸组织的破坏。至60年代,人们对肺气肿有了进一步的认识:某些类型病人可无症状,通气受限和呼吸困难的程度与肺气肿严重度密切相关,而与肺气肿类型关系不大。临床最常见的类型是小叶中心性或全腺泡性或二者合并存在的肺气肿。【呼吸气腔扩大的定义】气腔大于正常范围者称作呼吸气腔扩大。
In 1959, the British physicians group proposed: where there is an expansion of alveoli, whether accompanied by the destruction of lung tissue can be classified as emphysema. Subsequently, the World Health Organization, the American Thoracic Society in turn the definition of emphysema as part or all of the expansion of the alveolar accompanied by respiratory tissue damage. By the 1960s, there was a further understanding of emphysema: asymptomatic, restricted ventilation, and dyspnea in certain types of patients were closely related to the severity of emphysema and not to the type of emphysema. The most common type of clinical is centrilobular or total acinar, or a combination of the two emphysema. [Definition of Breathing Air Chamber Expansion] Air space greater than the normal range is called the breathing air chamber expansion.