颅内动脉瘤即颅内动脉上的病理性突出物,人群发生率为5%~8%,由于其部位、形状、大小以及瘤颈宽度等因素所致的瘤体破裂发生率约占动脉瘤人群的1%~2%[1-4]。动脉瘤一旦破裂出现侧脑室出血,患者将会陷入深度昏迷状态,而随着昏迷时间的延长肺部感染的几率也将增大,其致残、致死率极高。颅内动脉瘤患者入院时Hunt-Hess分级越高、GCS评分越低,其自主排痰能力越差,越易发生肺部感染。气管切开术 Intracranial aneurysm that intracranial artery pathological prominence, the crowd rate of 5% to 8%, due to its location, shape, size and tumor neck width and other factors caused by aneurysm rupture rate accounts for about 1% to 2% of the population [1-4]. Once the rupture of the aneurysm results in lateral ventricle hemorrhage, the patient will fall into deep coma, and as the coma prolongs the chances of lung infection will increase, causing disability and high mortality. Patients with intracranial aneurysm admission Hunt-Hess higher grading, GCS score lower, the more their ability to expectoration worse, the more prone to pulmonary infection. Tracheotomy