彩色多普勒超声在诊断玻璃体后脱离中的应用

目的 探讨彩色多普勒超声在玻璃体后脱离中的显像特点及其诊断价值.方法 应用高频彩色多普勒超声仪对1538例临床疑诊为玻璃体后脱离的患者进行检查,分析玻璃体后脱离的超声显像特点及鉴别诊断依据.结果 完全性玻璃体后脱离可见后界膜呈纤细波浪状,不与眼球壁相连;不完全性玻璃体后脱离与视网膜脱离的主要鉴别为后界膜回声一般增益条件下难显示清晰,视网膜较后界膜回声粗而亮,眼球转动时,玻璃体后界膜呈左右缓慢摇摆,脱离视网膜呈有弹性的上下抖动,难鉴别时CDFI显示脱离视网膜可见彩色血流信号,PW探及类似于视网膜中央动脉的低阻频谱,而玻璃体后界膜CDFI不显示血流信号.结论 超声检查可以准确诊断玻璃体后脱离,为临床诊断和手术治疗提供客观依据.

Application of color Doppler flow imaging in diagnosis of posterior vitreous detachment

ObjectiveTo discuss the diagnostic characteristics and clinical value of posterior vitreous detachment (PVD) using color Doppler flow imaging (CDFI). MethodsA total of 1538 cases with PVD underwent CDFI for the diagnostic standard and property of PVD. ResultsThe typical acoustic properties of complete PVD were that the vitreous posterior boundary membrane echoes presented clearly rugose and slender wave form which did not connect with the eyeball wall. Partial PVD presented slender and continuous echogenic band behind the vitreous body and connected with the eyeball wall in one or many places. The different point between the PVD and retinal detachment was that the former boundary membrane was thick and bright and slowly reeled right and left when the eyeball rotated, but the latter vibrated up and down elastically. If it was difficult to differentiate, color flow signals revealed on CDFI and PW showed low resistant flow Dopper similar to that of retinal central artery, otherwise, no flow appeared in PVD. ConclusionsCDFI can not only correctly diagnose PVD, but also provides foundation for clinical diagnosis and operation.