Is an important way of life for urgent, critical and serious patients. But some patients disease mood immediately undertake no longer breathing machine auxiliary breath still need tracheostomy, suction gas through the nose moist, easy to cause the lower respiratory tract dryness, sputum not easy eduction, serious when even ventilation in patients with blood flow caused by imbalance, atelectasis, block airway and pulmonary complications, eventually cause or worsen hypoxemia, lung infection. It has been reported that the incidence rate of pulmonary infection in patients with gas resection in intensive care unit (icu) is the first in the hospital acquired infection in icu, which is 25% ~ 78%, and the highest is 100% [1]