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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 observe the resistance index of patients with carotid artery stenosis between 50% -69% and 70% -99%, and to provide a reference for carotid artery stenosis classification: 30 cases of carotid stenosis 50% -69% and 28 cases 70% In 99% of the patients, the color Doppler technique was used to observe the resistance index parameters. RESULTS: There was no significant difference in RICIS before and after stenosis between 50% ~ 69% and 70% ~ 99% stenosis The difference of RI_ (CCA-DIS) was statistically significant (P <0.05) RI_ (CCA-DIS) ≥0.215 The sensitivity of carotid artery stenosis was 57.1% and specificity was 96.7% The rate was 77.6%. Conclusion: RI_ (CCA-DIS) is not a good index to judge the degree of vascular stenosis, but it can be used as a parameter to investigate 70% ~ 99% of carotid stenosis.