objective to study the window technique in evaluating the chronic obstructive emphysema and pulmonary residual volume in long-term smoker without symptoms.
目的探讨窗技术对慢性阻塞性肺气肿和无癥状长期吸烟者肺残气量的评价。
obstructive emphysema is one of the primary pathological manifestations of chronic obstructive pulmonary disease(copd), scientists have been focusing on obstructive emphysema.