Conclusion IOS determine respiration impedance is a sensitive marker of judgement air velocity obstruction, it can replace FEV1 judge the degree of COPD patients airway obstruction.
结论IOS法测定呼吸阻抗是判断气道阻塞的敏感指标，可以代替FEV 1判断COPD患者的气道阻塞程度。
Conclusion IOS determine respiration impedance is a sensitive marker of judgement air velocity obstruction, it can replace FEV1 judge the degree of COPD patients airway obstruction.
结论IOS法测定呼吸阻抗是判断气道阻塞的敏感指标，可以代替FEV 1判断COPD患者的气道阻塞程度。
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