本文应用脉动指数(PI)作为反映颅内动脉血管顺应性的指标。分别测定了正常人和急性脑血栓、一过性脑缺血、脑动脉硬化症四组人的大脑中动脉(MCA)PI值。结果表明正常人的血管顺应性最小,缺血性脑血管病人血管顺应性增大且随着病情的加重而增大。说明颅内动脉血管顺应性的大小不仅可作为缺血性脑血管病的客观诊断指标之一,而且还可作为判断病情和预后的敏感指标。 In this paper, pulsatility index (PI) as an indicator of intracranial arterial vascular compliance. The MCA PI values ​​of the four groups of normal and acute cerebral thrombosis, transient cerebral ischemia and cerebral arteriosclerosis were measured respectively. The results showed that the normal vascular compliance of patients with ischemic cerebrovascular vascular compliance increased and with the increase of the disease increased. That the size of intracranial arterial vascular compliance not only as an objective diagnostic indicators of ischemic cerebrovascular disease, but also as a sensitive indicator of disease and prognosis.