text: 【病理变化】HIE的病理变化与胎龄、损伤性质和程度密切相关，主要有以下几种病理类型：（一）两侧大脑半球损伤主要见于足月儿，窒息为不完全性，首先发生器官间的血液分流（潜水反射）以保证心、脑血供；随着缺氧持续，血压下降，血流第二次重新分布（脑内分流），即大脑半球的血供由于前脑循环血管收缩而减少，而丘脑、脑干和小脑的血供则由于后脑循环血管扩张而增加。
entities.entity: HIE
entities.label: dis
entities.entity: 两侧大脑半球
entities.label: bod
entities.entity: 窒息
entities.label: dis
entities.entity: 心
entities.label: bod
entities.entity: 脑
entities.label: bod
entities.entity: 缺氧
entities.label: dis
entities.entity: 血压
entities.label: ite
entities.entity: 丘脑
entities.label: bod
entities.entity: 脑干
entities.label: bod
entities.entity: 小脑
entities.label: bod
entities.entity: 血管
entities.label: bod