肺残气量是指补呼气后剩余在肺里的气量. 一般来说，在人体呼气后，大量二氧化碳气体都被排出，但是肺内仍存有少量无法呼出的气体，这就是肺残气量。
肺功能残气量 pulmonary functional residual capacity
肺扩张一残气量测定仪 diffusion-residual tester ; residual tester
残气量／肺总量比值 RV/TLC
残气量/肺总量比值 RV/TLC
目的探讨窗技术对慢性阻塞性肺气肿和无症状长期吸烟者肺残气量的评价。
Objective to study the window technique in evaluating the chronic obstructive emphysema and pulmonary residual volume in long-term smoker without symptoms.
结论：呼气末HRCT可用于评估old患者肺残气量并可诊断这类疾病。
Conclusions: Postexpiratory HRCT can be used to evaluate air trapping in patients with OLD, and be useful in the diagnosis of these diseases.
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