摘要
应用彩色多普勒血流显像技术对61例眩晕患者进行颅外段颈部血管，尤其是椎动脉内径、峰值血流速度（Vp）、每分钟血流量（Q）、压力降半时间（HT）、阻力指数（RI）、窗口指数（WI）等血流频谱参数进行了测定及分析研究。结果表明:（1）眩晕患者中59％出现不同程度椎动脉供血不足改变。（2）椎动脉狭窄与年龄成正相关。61例中36例超声检查异常者均40岁以上，约占40岁以上眩晕患者的63％。（3）椎动脉内径左侧优势（P＜0.01）。（4）椎动脉供血不足发病率明显高于颈总及颈内动脉。所查61例眩晕患者中，25例椎动脉单或双侧狭窄，4例颈总动脉分支前管壁粥样斑块形成，7例椎动脉走向弯曲。（5）脉冲多普勒频谱分析示，椎动脉狭窄患者的椎动脉Vp显著降低，HT延长，外周阻力增高，WI减低表明频带沿水平轴展开，频带展宽，每分钟血流量Q减低，阻力指数RI显著增高（P＜0.01或P＜0.001）。彩色多普勒血流显示，病变部彩色血流信号失落。认为:采用切面超声、脉冲多普勒、彩色血流显像三结合检测椎动脉颅外段可为临床眩晕患者诊断提供有价值依据，此方法安全、无创、敏感性高，当为首选方法。
Objective The writer of this article has studied 61 patients with dizziness. Methods Color Doppler ultrasound technique was used to measure and study blood flow frequency parameter including diameter, peak velocity (Vp), minute flow (Q), pressure reduce half t1me (HT),resistance index(RI) and window index (WI)of vertebral artery in them. Results (1) There was short blood supply of vertebral artery in 59% patients. (2) Stricture of vertebral artery was in direct proportion to age of patients. (3) Diameter of left vertebral artery was bigger (P<0.01 ). (4) The vertebral artery was more easily involved than the carotid artery. (5) Evaluation of frequency: Vp was down,HT was prolonged, WI was lowered, Q was reduced,RI up (P <0. 01 or P <0. 001 ). Blood flow showed:Blood flow signal at region with pathological changes was disappeared. Conclusion Use of color Doppler ultrasound technique is valuable to clinical diagnosis for patients with dizziness.
出处
《中国神经免疫学和神经病学杂志》
CAS
1997年第2期87-90,共4页
Chinese Journal of Neuroimmunology and Neurology
