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对１７例并发急性下呼吸道感染的慢性阻塞性肺病（ＣＯＰＤ）病人进行了营养状态评定和血浆游离氨基酸测定。本组病人在感染时和感染控制后的理想体重百分比（％ＩＢＷ）均低于９０％，亮氨酸、缬氨酸、精氨酸、丙氨酸和组氨酸等含量在感染控制后明显升高，支链氨基酸／芳香氨基酸比值（ＢＣＡＡ／ＡＡＡ）与％ＩＢＷ之间存在显著相关性。结果表明，ＣＯＰＤ病人并发急性下呼吸道感染时可促使营养不良更趋恶化，而ＢＣＡＡ／ＡＡＡ可作为评定ＣＯＰＤ营养状态的一种重要指标推荐应用。
Twenty-seven patients with chronic obstructive pulmonary disease (COPD) complicated by acute lower respiratory tract infection were evaluated for nutritional status and plasma free amino acids. In this group, the ideal percentage of body weight (% IBW) at infection and after infection control was less than 90%, and the contents of leucine, valine, arginine, alanine and histidine were obvious after infection control There was a significant correlation between the ratio of BCAA / AAA and% IBW. The results show that COPD patients with acute lower respiratory tract infection can promote malnutrition worsened, and BCAA / AAA can be used as a measure of nutritional status of COPD is an important indicator of recommended.