机械通气支持业已成为危重症者抢救的重要手段,但在应用机械通气治疗方面至今仍存在很多争议,机械通气的应用与脱机仍带有经验性。当导致呼衰的病因好转后,应尽快开始撤机。延迟撤机将增加医疗费用和机械通气并发症的发生;过早撤机又可导致撤机失败,增加再插管率和病死率。机械 Mechanical ventilation support has become an important means of emergency treatment for critically ill patients. However, there are still many controversies in the application of mechanical ventilation therapy. The application of mechanical ventilation and its offline are still experienced. When the cause of respiratory failure improved, should start as soon as possible weaning. Delayed weaning will increase the medical costs and complications of mechanical ventilation; premature weaning may lead to weaning failure, increase re-intubation rate and mortality. mechanical