MV was required by 74% of patients because of bronchial secretions (83%),unconscious(78%),pneumonia (78%),and respiratory muscles paralysis (57%).

• 74%25的患者需行机械通气治疗,由于气道分泌物多(83%25),意识改变(78%25),肺炎(78%25)和呼吸肌麻痹(57%25)等因素。