【摘要】 目的：探讨气道阻塞对用力肺活量的影响。方法：对２６７例肺量计测定结果进行回顾性研究。其中，正常１５４例，气道阻塞１１３例；平均年龄５８．４±１８．１岁。结果：与ＦＥＶ１％＞８０％组相比，ＦＥＶ１％＜８０％者年龄较大，ＶＣ、％ＶＣ、ＦＶＣ、ＦＥＶ１、％ＦＶＣ及ＦＥＶ１％明显降低。在ＦＥＶ１％＞８０％的１５４例中，％ＦＶＣ与ＦＥＶ１％呈负相关（ｒ＝－０．３１１，Ｐ＜０．００１）；而在ＦＥＶ１％＜８０％的１１３例中，％ＦＶＣ与ＦＥＶ１％呈正相关（ｒ＝０．３４２，Ｐ＜０．００１），回归方程为％ＦＶＣ＝２０．８＋０．７８×ＦＥＶ１％。气道阻塞对ＦＶＣ产生明显的影响，即当ＦＥＶ１％＜８０％时，ＦＥＶ１％愈低，％ＦＶＣ下降愈明显。结论：回归方程能够了解气道阻塞对ＦＶＣ的影响程度。更多还原

【Abstract】 Objective:To investigate effects of airway obstruction on forced vital capacity(FVC).Methods:Records of spirometric examination were studied retrospectively in 267 subjects,including 154 normals and 113 suffering from airway obstruction,with an average age of 58.4±18.1.Results:Vital capacity(VC),%VC,FVC,forced expiratory volume in the first second (FEV 1),%FVC and FEV 1% in the subjects with FEV 1%<80% were signficantly lower than in those with FEV 1%>80%.Percent FVC was negatively related to FEV 1%( r =-0.311, P <0.001) in 154 subjects with FEV 1%>80%,but positively related to FEV 1%( r =0.342, P <0.001) in 113 subjects with FEV 1%<80%,with a regression equation of %FVC=20.8+0.78×FEV 1%。Conclusions:There is a significant influence of airway obstruction on FVC.If FEV 1% is <80%,the smaller the FEV 1%,the more the %FVC decreases.According to the equation,the effects of airway obstruction on FVC can be deduced.更多还原