作者研究了32例严重脑外伤病人治疗前后的脑 动静脉血氧差(AVDO_2),以明确AVDO_2和脑灌注压(CPP)、迟发性脑梗塞及预后之间的关系。 32名病人皆在伤后8小时内入院(CCS≤8分),其中男21例,女11例,平均年龄34.5岁(14～79岁),全部病例均符合以下标准:(1)单纯性头部非穿透伤;(2)血压正常;(3)体温正常;(4)血细胞比容>30％;(5)入院生存时间超过24小时。病人分为两组:A组15例,行开颅血肿清除术。B组17例,CT扫描未发现血肿, The authors studied the cerebral arteriovenous oxygen difference (AVDO_2) in 32 patients with severe traumatic brain injury before and after treatment to clarify the relationship between AVDO_2 and cerebral perfusion pressure (CPP), delayed cerebral infarction and prognosis. All 32 patients were admitted within 8 hours after injury (CCS≤8), including 21 males and 11 females, with an average age of 34.5 years (range, 14-79 years). All cases met the following criteria: (1) Head non-penetrating injury; (2) normal blood pressure; (3) normal body temperature; (4) hematocrit> 30%; (5) admission survival time of more than 24 hours. Patients were divided into two groups: A group of 15 patients underwent craniotomy hematoma. B group 17 cases, CT scan found no hematoma,