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胸灌注压是维持正常脑血液循环的决定性因素之一。脑血流量与脑灌注压力成正比,与脑血流阻力成反比。脑灌注压等于平均动脉压(MABP)与出颅的平均静脉压力差。预内静脉压(IJP)对脑血流影响不大。脑血流的调节主要通过颅外调节与颅内调节。颅外调节以平均动脉压起作用最大,颅内调节以脑血管阻力的改变起作用最大。维
Chest perfusion pressure is one of the decisive factors in maintaining normal cerebral blood circulation. Cerebral blood flow is proportional to cerebral perfusion pressure and inversely proportional to cerebral blood flow resistance. Cerebral perfusion pressure is equal to the mean arterial pressure (MABP) and the mean difference of venous pressure from the skull. Pre-venous pressure (IJP) has little effect on cerebral blood flow. Cerebral blood flow regulation mainly through the extracranial and intracranial regulation. Extracranial regulation of the role of the average arterial pressure, intracranial regulation of cerebral vascular resistance changes play a role. dimension