经颅多普勒超声诊断脑动脉痉挛与数字减影血管造影的对比研究

目的探讨经颅多普勒超声(TCD)诊断大脑中动脉(MCA)、椎动脉(VA)、基底动脉(BA)痉挛的可靠性。方法对50例蛛网膜下腔出血患者同时行TCD和数字减影血管造影(DSA)检查并进行对比分析。结果DSA发现MCA痉挛26条，其中TCD检出21条，DSA未证实有痉挛的MCA中，TCD检出4条，TCD诊断MCA痉挛的敏感性为80．8％，特异性为84．0％，而且MCA痉挛程度越重，TCD敏感性越高。DSA发现BA痉挛18条，其中经TCD检出13条，DSA未证实有痉挛的BA中，TCD检出4条，TCD诊断BA痉挛的敏感性为72．2％，特异性为76．5％。DSA发现VA痉挛28条，其中经TCD检出20条，DSA未证实有痉挛的VA中，TCD检出6条，TCD诊断VA痉挛的敏感性为71．4％，特异性为76．9％。结论TCD诊断MCA、VA、BA痉挛有较高的可靠性。

Comparative study on transcranial doppler and digital subtraction angiography in detection of cerebral arterial spasm

Objective To evaluate the reliability of transcranial doppler (TCD) in detection spasm of middle cerebral artery (MCA),vertebral artery (VA ) and basilar artery (BA).Methods TCD and digital subtraction angiography (DSA) examination were undertaken in 50 patients with subarachnoid hemorrhage.Results Arterial spasm was diagnosed in 26 MCA by DSA,21 of which were detected by TCD at same time.4 MCA were showed by TCD but not confirmed by DSA. The sensitivity and specificity of TCD in diagnosing MCA spasm were 80.8% and 84.0% respectively. Higher sensitivity was revealed in those with severe MCA spasm. DSA also found out asterial spasm of BA in 18 BA,among which 13 arteries were detected by TCD simutaneously.4 BA were diagnosed by TCD but not proved by DSA. The sensitivity and the specificity of TCD in diagnosing BA spasm were 72.2% and 76.5% respectively.28 VA were diagnosed by DSA,among which 20 arteries were proved by TCD.6 VA were detected by TCD but not proved by DSA. The sensitivity and specificity of TCD in diagnosing VA spasm were 71.4% and 76.9% respectively.Conclusion TCD is reliable in diagnosing the spasm of MCA,BA and VA.