With the maintenance, purchase and utilization analyzed, the medical engineer is oriented to enhancing the efficiency of the hospital and strengthening the construction of medical engineering department.

The inhalation,exhalation,electronics system and clinical application of Newport E360 ventilator are introduced.Study and technical analysis are given on the working principles of dual servo gas delivery system(one for air and the other for oxygen).The safety system and circuit system are studied and analyzed to provide reference for engineers in equpiment department in hospital.