正常肺容量

ERV = 补呼气量；FRC =功能残气量；IC =吸气量；IRV =补吸气量；RV = 残气量；TLC = 肺总量；VC = 肺活量；V_T=潮气量。

FRC = RV + ERV；IC = V_T + IRV；VC =V_T+ IRV + ERV。