【摘要】 目的 :观察经颅多普勒 (TCD)诊断为颈内动脉 (ICA)狭窄或闭塞患者的频谱特点、临床表现 ,与影像学进行对照 ,并观察治疗后TCD变化。方法 :1 4例患者经TCD诊断并经数字减影血管造影 (DSA)或磁共振血管成像 (MRA)。治疗后复查 9例。结果 :大脑中动脉平均血流速度 <1 5cm/s的 4例患者梗塞面积大、症状重、预后差。脉动指数等指标的下降比流速更敏感。TCD与DSA全部符合 ,与MRA符合率为 87 5% ( 7/8)。结论 :TCD对ICA狭窄或闭塞的诊断准确性较高 ,可作为临床筛选和治疗后定期复查的手段 ,并有助于判断预后。更多还原

【Abstract】 Objective:To observe the Doppler spectrum and clinical characteristics in 14 patients with internal caroted artery(ICA) stenosis or occlusion with comparison with MRA and DSA findings and the changes after treatment.Methods:Fourteen patients with stenosis or occlusion of ICA were diagnosed by using TCD from April,1997 to April,1999 and were confirmed by using digital subtraction angiography(DSA) and magnetic resonance angiography(MRA).Of them,nine patients were reexamined after treatment.Results:The mean flow velocity of the middle cerebral artery(MCA)<15 cm/s of four patients got severe symptoms and large infarctions.The reduction of pulsatility index and pulsatility transmission index are more sensitive than blood flow velocity.Conclusion:TCD provides a reliable and noninvasive diagnosis for ICA stenosis or occclusion,which may be used for a screening examination and regular reexamination after treatment.Proper selection of TCD and other imaging examinations will benefit the patients.更多还原