彩色多普勒成像技术对近视眼眼部血流动力学研究  

Studying on ocular hemodynamics in myopia with color Doppler flow imaging

作　　者：苟珊[1] 龚渭冰[1] 

机构地区：[1]南方医科大学附属南方医院超声科,广东广州510515

出　　处：《中国临床医学影像杂志》2006年第5期241-243,共3页Journal of China Clinic Medical Imaging

摘　　要：目的:观察近视眼的血流动力学改变,及与眼轴、眼压等的关系。方法:应用彩色多普勒超声诊断仪对中度近视(26例,52只眼)、高度近视(23例,44只眼)患者和正常人(25例,50只眼)的眼动脉、睫状后短动脉、视网膜中央动脉的收缩期峰值流速(PSV)、舒张期最小流速(EDV)和阻力指数(RI)以及眼轴、眼压等进行检测。结果:近视眼患者眼动脉的PSV、EDV及RI与正常人相比无显著性差异(P>0.05);视网膜中央动脉和睫状后短动脉的PSV、EDV比正常人低(P<0.05),RI比正常人高(P<0.05);中度近视眼组与高度近视眼组比较,睫状后短动脉的EDV、视网膜中央动脉的EDV、RI有显著性差异(P<0.05);近视眼眼轴、眼压与正常人相比亦有显著性差异(P<0.05)。结论:近视眼眼底血管视网膜中央动脉、睫状后短动脉血流动力学改变是屈光度进一步加深、视功能损害的重要原因之一。Objective： To study the hemodynamic changes of ophthalmic artery（OA）, short posterior ciliary artery（SPCA）, and central retinal artery（CRA） in patients with myopia. Methods： Fifty-two eyes in 26 patients with medium myopia, 44 eyes of 23 patients with severe myopia, and 50 eyes of 25 normal subjects were studied. Peak systolic velocity（PSV）, end diastolic velocity（EDV） and resistance index（Rl） of OA, SPCA and CRA were measured in the 3 groups and comparison was carried out. Results： Compared to normal subjects, the patients with medium myopia and severe myopia showed a significant decrease （P〈0.05） in the mean PSV and EDV of the CRA and SPCA, and a significant increase（P〈0.05） in the mean RI of the CRA and the PCA, but there was no significant difference （P〉O.05） in the OA for the 3 groups. Compared to the patients with medium myopia, the patients with severe myopia showed a significant decrease （P〈0.05） in the mean PSV and EDV of the CRA and SPCA, and a significant increase（P〈0.05） in the mean RI of the CRA. Compare to normal subjects, eye axes and eye pressure in myopia patients also showed a significant difference（P〈0.05）. Conclusion： In patients with myopia, there appears to be an association between decreased mean flow velocity and an increased mean resistive index in the ocular vasculature. Factors relating to both vasculature and eye pressure have an important role in the pathogenesis of myopia.

关 键 词：近视 超声检查 多普勒 彩色 

分 类 号：R778.11[医药卫生—眼科] R445.1[医药卫生—临床医学]