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目的：研究经颅多普勒（ＴＣＤ）评估蛛网膜下腔出血患者脑血流量（ＣＢＦ）的价值。方法：３１例蛛网膜下腔出血患者同时做了ＴＣＤ及１３３Ｘｅ吸入法测定ＣＢＦ。结果：蛛网膜下腔出血患者平均血流速度（Ｖｍ）升高者，则相应区域ＣＢＦ降低，呈负相关（ｐ＜０．０１）；而Ｖｍ降低者则相应区域ＣＢＦ亦降低，呈正相关ｐ＜０．０１。病情越严重则ＴＣＤ－Ｖｍ升高或降低越明显，ＣＢＦ亦明显下降。结论：ＴＣＤ可以有效判断蛛网膜下腔出血患者的脑血流量。
Objective: To study the value of transcranial Doppler (TCD) in assessing cerebral blood flow (CBF) in patients with subarachnoid hemorrhage. Methods: Thirty-one patients with subarachnoid hemorrhage underwent both TCD and 133Xe inhalation to determine CBF. Results: The mean CBF of patients with subarachnoid hemorrhage increased (P <0.01), while the corresponding areas of CBF decreased, with a negative correlation <0.01. The more serious the condition TCD-Vm increase or decrease the more obvious, CBF also decreased significantly. Conclusion: TCD can effectively determine the cerebral blood flow in patients with subarachnoid hemorrhage.