颈动脉狭窄50%～69%和70%～99%的阻力指数观察  

Resistance index in patients with 50%- 69%and 70%- 99%carotid artery stenosis

作　　者：张峰[1] 王薇[1] 沈建红[1] 沈嫱[1] 

机构地区：[1]广东省中医院超声影像科,广东广州510120

出　　处：《广州医学院学报》2012年第2期31-33,共3页Academic Journal of Guangzhou Medical College

摘　　要：目的:观察颈动脉狭窄50%～69%和70%～99%患者的阻力指数特点,为颈动脉狭窄分度提供参考方法:选取30例颈动脉狭窄50%～69%和28例70%～99%患者,应用彩色多普勒技术观察阻力指数参数特点结果:50%～69%和70%～99%狭窄的2组狭窄前RICCA差异无统计学意义,而狭窄后RIDIS和狭窄前后的RI差值RI_(CCA-DIS)差异有明显统计学意义(P<0.05) RI_(CCA-DIS)≥0.215对颈动脉狭窄70%～99%的敏感性为57.1%,特异性96.7%,总准确率为77.6%。结论:RI_(CCA-DIS)不是一个判断血管狭窄分度的良好指标,但可以作为排查颈动脉狭窄70%～99%的参数。Objective ：To determine the features of resistance index in patients with 50% -69% and 70% -99% carotid artery stenosis, thereby providing references for clinical grading. Methods： Thirty patients with 50% -69% and 28 as having 70% - 99% carotid artery stenosis were enrolled to determine the features of resistance index via color Doppler uhrasonography. Results ： The distinction in RICCA prior to narrowing did not reach statistical significance （P 〉 0.05 ） in patients with 50% -69% and 70% -99% carotid artery stenosis. In contrast, both RIDIS after carotid artery narrowing and RIccA_DIS, the difference of RI prior to and after narrowing, achieved marked statistical significance （P 〈 0. 05 ）. A diagnostic accuracy of 77.6% （ sensitivity： 57. 1%, specificity：96.7% ） was reported for RICCA-DIS 1〉 0. 215 in patients with 70% - 99% carotid artery stenosis. Conclusion： RICCA-DISmay apply for exclusion of 70% -99% carotid artery stenosis ,but not being a surrogate for grading vascular stenosis.

关 键 词：颈动脉狭窄 阻力指数 彩色多普勒 

分 类 号：R445.1[医药卫生—影像医学与核医学]