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目的：为了研究睡眠呼吸暂停综合征（ＳＡＳ）患者的颈动脉Ｄｏｐｐｌｅｒ超声表现并探讨血流参数的变化。方法：用彩色多普勒超声仪，７．０ＭＨｚ探头，选择４０例ＳＡＳ患者作双侧颈动脉Ｄｏｐｐｌｅｒ超声检查，并与４０例无ＳＡＳ、性别、年龄、基础疾病相匹配的对照组比较。结果：①粥样斑块的发生率ＳＡＳ组为４２．５％，对照组为３２．５％（Ｐ＜０．０５）。②阻力指数（ＲＩ）测定ＳＡＳ组明显高于非ＳＡＳ组（Ｐ＜０．０１）。③颈内动脉流速与颈总动脉流速比值（ＶＩＣＡ／ＶＣＣＡ）两组间有非常显著差异（Ｐ＜０．０１）。④ＳＡＳ组颈动脉频谱形态多有改变，文中列出四种波形。结论：作者认为，ＳＡＳ患者颈动脉硬化多较显著，血液动力学改变以外周阻力增加为主。
Objective: To study the carotid Doppler echocardiography in patients with sleep apnea syndrome (SAS) and to explore the changes of blood flow parameters. Methods: Color Doppler ultrasound and 7.0MHz probe were used to select 40 patients with SAS for bilateral carotid artery Doppler echocardiography and compared with 40 control subjects without SAS, gender, age and basic diseases. Results: ① The incidence of atherosclerotic plaques was 42.5% in SAS group and 32.5% in control group (P <0.05). ② Resistance index (RI) was significantly higher in SAS group than in non-SAS group (P <0.01). ③ The ratio of internal carotid artery velocity to carotid artery velocity ratio (VICA / VCCA) was significantly different between the two groups (P <0.01). ④SAS group carotid artery spectral morphology changes, the paper lists four waveforms. Conclusion: The authors believe that carotid atherosclerosis in SAS patients were more significant, hemodynamic changes to peripheral resistance increased mainly.