| 摘要 |
PROBLEM TO BE SOLVED: To provide a testing method and apparatus which enable a clinical pulmonary function test based on a respiratory tract cross section for testing a pulmonary function by using sounds.SOLUTION: In a pulmonary function testing method, forced oscillation is applied to a pulmonary airway, pressure fluctuation inside the pulmonary airway or a tube connected to the pulmonary airway is detected, a cross section of an upper respiratory tract is estimated on the basis of this pressure signal, and a pulmonary function is tested on the basis of information on the estimated cross section. Alternatively, the contribution of the upper respiratory tract is removed from respiratory impedance on the basis of the information on the upper respiratory tract cross section, and peripheral airway impedance expected from a peripheral side end position of the upper respiratory tract to the pulmonary airway is estimated. |
