新版E-tracking技术在颈动脉弹性功能定量研究中的应用

目的 探讨新版血管回声跟踪（ET）技术在定量评价颈动脉弹性功能中的价值。方法研究对象为有颈动脉斑块并有相应症状（症状组）、有颈动脉斑块但无相应症状（斑块组）、颈动脉无斑块形成但有高危临床表现（高危组）及健康查体者（对照组），采用新版ET技术对其颈动脉血管弹性功能进行测定，参数包括僵硬度（B）、压力应变弹性系数（Ep）、顺应性（AC）、增大指数（AI）、脉搏波传导速度（PWVβ）、收缩期内径（Ds）和舒张期内径（Dd），并对症状组和斑块组上述参数进行相关性分析。结果症状组及斑块组双侧颈动脉弹性指标差异无统计学意义，但其EO、β、PWVβ、AI及IMT显著高于高危组及对照组，AC显著低于高危组及对照组（P〈0．05、0．01）；症状组及斑块组PWVβ与β、EO和IMT呈正相关，与AC呈负相关，AI与EO、β、AC和IMT无明显相关。结论新版ET技术可客观准确反映颈动脉血管的弹性变化，为早期预防和疗效评价提供重要信息。

Application of newly E-Tracking technique in the quantitative evaluation of carotid elasticity

Objective To investigate the value of newly E-Tracking technique in the quantitative evaluation of carotid elasticity. Methods The subjects included 32 cases with carotid atheromatous plaque and symptoms （ symptom group） ,26 cases with carotid atheromatous plaque and no symptoms （plaque group）, 26 cases with high risk symptoms （high risk group） ,25 normal eases （control group ）. The carotid elasticity in the four groups were evaluated by newly E- Tracking teclmique. Results There were no significant difference in carotid elasticity parameters between two sides in symptom group and plaque group, but the data of Eρ, β, PWVβ,AI and IMT in which were significantly higher than those in the high risk group and control group, and AC in which was significantly lower （P 〈0.05,0.01 ）. PWVβ in symptom group and plaque group was positively related to β, Ep, IMT and negatively related to AC, while there was no correlation among EO, β, AC, IMT and AI. Conclusions Newly E- Tracking teclmique can reflect the changes of carotid elasticity objectively and accurately, and may provide important information for early prevention and therapeutic evaluation .