超声造影技术在颈动脉狭窄评价中的应用价值

目的探索超声造影技术在颈内动脉狭窄评价中的应用.方法常规超声沿颈动脉扫描检查,测量管径及内中膜的厚度,注意观察斑块大小、回声特点,频谱观察血流速度和方向等;肘部浅静脉注射1 mL造影剂,同时注射5 mL生理盐水,用造影成像软件着重观察颈动脉长轴切面,尤其是狭窄部位,同时以横切面从近到远心段顺序扫查.结果以数字减影血管造影（DSA）作为判断血管狭窄程度的金标准,常规超声和超声造影对于颈内动脉狭窄程度的判断精确率有统计学意义（P〈0.05）,超声造影更易检测出溃疡,两者联合检测临床效果更佳.结论造影增强超声利用静脉注射超声造影剂和超声成像的新型技术,能够非常清晰的呈现微细血管及组织血流灌注,进一步增强图像的对比分辨力.

Application of Ultrasound Imaging Techniques in the Evaluation of Carotid Artery Stenosis

Objective To explore the application of ultrasound imaging techniques in the evaluation of carotid artery stenosis. Methods Conventional ultrasound scan along carotid, to observe plaque size, echo size, blood flow velocity and flow direction, diameter and thickness of the medial and so on. Following elbow superficial vein injection 1 mL of contrast agent and 5 mL saline. Contrast imaging software focuses on observing carotid long axis, especially stenosis, while the cross -section from proximal to distal segment sequential scan. Results There was statistical significance in the precise rate of judgement of carotid artery stenosis between conventional ultrasound and ultrasound imaging techniques（P〈0. 05）. Conclusion Ultrasound imaging techniques has a higher accuracy rate than conventional ultrasound in diagnosis of internal carotid artery stenosis.