肺容积、肺容量和肺通气量简介

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                    <section><section powered-by="gulangu"><section><section><p><img src="image/20201019/ee5351fab4981dceda029e1266a48758_1.gif" /></p></section></section></section><section powered-by="gulangu"><section><section><p>肺容积</p></section><p><img src="image/20201019/19a6da88b13814e5800024e789b60abc_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;潮气量（VT）：平静呼吸时吸入或呼出的气体量。正常值为（500~600）mL。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 补吸气量（IRV）：平静吸气末，再尽力吸气所能吸入的气体量。正常为（1500~2500）mL，或2/3肺活量。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 补呼气量（ERT）：平静呼气末，再尽力呼气所能呼出的气体量。正常为（1000~2000）mL，或1/3肺活量。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;残气量（RV）：最大呼气末仍存留在肺内不能呼出的气量。正常为（1500~2000）mL。</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/1f7aa1ba900c8ffd7c0c3b15cea48e5c_3.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>肺容量</p></section><p><img src="image/20201019/19a6da88b13814e5800024e789b60abc_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 功能残气量（FRC）：平静呼气末仍存留在肺内的气体量，是补气量和残气量之和（FRC=ERV+RV），正常为（2500~3500）mL。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 吸气量（IC）：平静呼气末做气体最大限度的吸气动作时所能吸入的量，是潮气量和补吸气量之和（IC=IRV+VT）。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 肺活量（VC）：最大吸气后所能呼出的气体量，是潮气量、补吸气量和补呼气量之和（VC=TRV+VT+ERV）。VC反映了一次通气的最大能力，正常为（3000~5500）mL。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 肺总量（TLC）：肺所能容纳的最大气体量，是肺活量和残气量之和（TLC=VC+RV）。正常约为（5000~6000）mL。</p></section></section></section><section powered-by="gulangu"><section><section><p>闭合容量</p></section><p><img src="image/20201019/19a6da88b13814e5800024e789b60abc_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 闭合容量（closing capacity,CC）是指在呼气相小气道（细支气管）关闭时肺内残留的气体量。小气道关闭易发生于肺的重力依赖区（下方背侧），由于重力的作用，气道管壁周围组织的压力超过终末气道内压力，易于将管腔压闭。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;正常情况下，CC小于FRC，即在平静呼气末之前无小气道提前关闭。</p></section></section></section><section powered-by="gulangu"><section><section><p>肺通气量</p></section><p><img src="image/20201019/19a6da88b13814e5800024e789b60abc_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;分钟通气量是指每分钟进或出肺的气体总量，等于潮气量乘以呼吸频率。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;在计算真正有效的气体交换量时，应扣除死腔部分。肺泡通气量是指每分钟进入肺泡的新鲜气体量，等于（潮气量-死腔）*呼吸频率，是真正参与气体交换的部分。</p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>欢</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>迎</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>注</p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><img src="image/20201019/0cd2ef3f7891605295295294472eba14_7.jpg" /></p></section></section></section></section><section><section powered-by="gulangu"><section><section></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section></section></section></section></section>