The Application of Impulse Oscillometry on the Diagnosis of ACOS,Asthma and COPD.

"1，Before the experiment, the patient is arranged to rest 10min. 2, IOS: The patient take seats, body relax, make sure the mouthpiece is fully covered by mouth, then clip nose with both hands to cover both sides of the cheek, and then calm breathing 1 minutes, the computer is automatically collected data calculation and print out the measurement results.~3, Bronchial Dilation Test: The patient is asked to take IOS again after gaven aerosol inhalation of 200g salbutamol for 15min, the computer is automatically collects the data computation and prints the measurement result."