The oscillation frequency only was the function of oscillating tube length, not influenced by the spliter.

While impulse forces not acting on the centroid, the influence of accessional attack Angle oscillation amplitude, impulse force scale and function time interval on range correction was discussed.

Objective To evaluate the relationship between the pulmonary function with impulse oscillation system and postoperative respiratory complications of esophagus carcinoma and gastric cardiac carcinoma.