颈动脉支架置入术后颅内血管反应性动态观察

目的 探讨颈动脉支架置入术(CAS)后脑血管反应性(CVR)的变化规律及影响CVR的相关因素.方法 选择自2008年7月至2009年9月南京军区南京总医院神经内科行CAS并完成随访的37例患者,采用经颅多普勒超声(TCD)结合屏气试验检测术前、术后1～2d和随访3～10月时双侧大脑中动脉的屏气指数(BHI).采用重复测量设计的方差分析检测支架置入术前后BHI的变化规律,并采用多元回归法分析影响最终BHI的相关因素.结果 37例患者术后手术侧BHI均较术前明显提高(P＜0.05).随访时的BHI与术后BHI呈正相关(β=1.030,P=0.000),串联狭窄与随访时的BHI呈负相关(β=-0.016,P=0.002).结论 CAS能立即改善术侧CVR使之逐渐接近正常,串联狭窄是影响最终CVR的独立危险因素.

Abstract：

Objective To explore the changes and influencing factors of cerebral vasoreactivity (CVR) in patients after carotid angioplasty and stenting (CAS). Methods Thirty-seven patients performed CAS, admitted to our hospital from July 2008 to September 2009, were finished the follow-up and chosen in our study; the breath-holding index (BHI) of the bilateral middle cerebral artery was measured using transcranial Doppler combined with breath holding test before thc operation, and 1 d and 3-10 months after the operation. Repeated measures design analysis of variance was employed to detect the BHI changes before and after the stenting; multiple regression was employed to analyze the influencing factors of BHI. Results BHI values after stenting were significantly higher than those before stenting on the stenotic side (P＜0.05). The follow-up BHI values were negatively correlated with those of tandem stenoses (β=-0.016, P=0.002) and positively correlated with the postoperative BHI values (β=1.030, P=0.000). Conclusion CAS can immediately improve CVR on the ipsilateral side and make it close to normalization gradually. Tandem stenoses are the independent risk factors of CVR.

Dynamic observation of cerebral vasoreactivity after carotid angioplasty and stenting

Objective To explore the changes and influencing factors of cerebral vasoreactivity (CVR) in patients after carotid angioplasty and stenting (CAS). Methods Thirty-seven patients performed CAS, admitted to our hospital from July 2008 to September 2009, were finished the follow-up and chosen in our study; the breath-holding index (BHI) of the bilateral middle cerebral artery was measured using transcranial Doppler combined with breath holding test before thc operation, and 1 d and 3-10 months after the operation. Repeated measures design analysis of variance was employed to detect the BHI changes before and after the stenting; multiple regression was employed to analyze the influencing factors of BHI. Results BHI values after stenting were significantly higher than those before stenting on the stenotic side (P＜0.05). The follow-up BHI values were negatively correlated with those of tandem stenoses (β=-0.016, P=0.002) and positively correlated with the postoperative BHI values (β=1.030, P=0.000). Conclusion CAS can immediately improve CVR on the ipsilateral side and make it close to normalization gradually. Tandem stenoses are the independent risk factors of CVR.