功能残气量和肺一氧化碳弥散量测定的技术规范和质量控制
Chinese Journal of Tuberculosis and Respiratory Diseases(2012)
Abstract
功能残气量(functional residual capacity,FRC)指的是平静呼气后肺内残留的气体量,等于残气量(RC)加补呼气量(ERV).FRC对稳定肺泡气体分压起缓冲作用,如果没有FRC,呼气末期肺泡将完全陷闭.FRC增加提示肺泡扩张,FRC减少说明肺泡缩小或陷闭.FRC不能直接测定,通常采用间接的方法,主要有密闭体描法,密闭式氮稀释法,密闭氦稀释法(一口气法和重复呼吸法).
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