经颅彩色及频谱多普勒超声评价大脑中动脉狭窄支架术血流动力学变化

目的 应用经颅彩色及频谱多普勒超声观察大脑中动脉(MCA)支架成形术前后的血流动力学变化.方法 对30例大脑中动脉狭窄的患者行经颅超声检查,采用二维及频谱多普勒对比观察MCA支架成形术前、术中即刻及术后的血流动力学变化.所有患者均经数字减影血管造影检查确诊.结果 30例MCA狭窄患者彩色多普勒超声检查均成功显像.28例...

Tranacranial color-coded and pulsed-Doppler sonographic evaluation of hemodynamics of the middle cerebral artery stenting

Objective To evaluate the hemodynamic changes in patients with middle cerebral artery (MCA) stenosis pre- and post-stenting by transcranial color-coded and pulsed-Doppler sonography.Methods Thirty patients with middle cerebral artery stenosis were included.Two-dimensional,color-coded and pulsed-Doppler sonography were used to monitor the morphologic and hemodynamic changes of the MCA before,in the middle of,and after the endovascular stenting operation.All patients were verified by digital substract angiography.Results The hyper-echoic stent grafts and also the size and location of the stent were clearly shown by two-dimensional ultrasonography in 28 patients.The systolic,diastolic and the timeaveraged maximal flow velocities significantly decreased both instantly and 3 - 7 d after the stenting.Specifically,the systolic peak flow velocity of the MCA dramatically decreased immediately after the stenting [(151.43 ± 25.14) cm/s vs (286.13 ± 57.38)cm/s,P ＜0.05],and showed a further decrease after 3 - 7 d [(108.80 ± 9.95) cm/s vs (151.43 ± 25.14) cm/s,P ＜0.05].Conclusions Transcranial color-coded and pulsed-Doppler sonography could be used to evaluate the hemodynamic changes after MCA stenting,and could be considered as the first choice of method for evaluating the therapeutic outcome of stenting.