objective to determine the manifestation of impulse oscillometry (ios) in variation of respiration impedance on patients with extratracheal tumour.
目的应用脉沖振蕩法(ios)探讨气道外肿物呼吸阻抗的变化规律和临床意义。
methods the impedance of respiratory system was measured by impulse oscillometry system (ios) and compared with parameter values of routine pulmonary ventilation function in 117 patients with copd.