脑血流自动调节是机体的一种适应能力,即灌注压变化时机体仍能保持恒定的脑血流供应。脑血流量和脑有效灌注压(CCP)成正比,与脑血管阻力(CVR)成反比,其关系为CBF=CPP/CVR。脑血流量特别是脑不同部位区域性血流量的调节,大多是通过改变脑血管阻力来完成的。在总脑血管阻力中,毛细小动 Auto-regulation of cerebral blood flow is an adaptive capacity of the body, that is, when the perfusion pressure changes, the body can still maintain a constant supply of cerebral blood flow. Cerebral blood flow is proportional to the effective cerebral perfusion pressure (CCP) and inversely proportional to cerebral vascular resistance (CVR). The relationship is CBF = CPP / CVR. Cerebral blood flow, especially in different parts of the brain regional blood flow regulation, mostly through the change of cerebral vascular resistance to complete. In total cerebral vascular resistance, small capillaries