玻璃体后脱离的超声诊断特点分析

目的探讨玻璃体后脱离的超声显像特点及其诊断价值。方法应用超声诊断技术对1002例患者进行检查，分析玻璃体后脱离的声像图特点和诊断依据。结果玻璃体后脱离的典型形态学改变表现为玻璃体内连续条带状回声，根据其是否与眼球后极部球壁回声相连分为完全性玻璃体后脱离和不完全性玻璃体后脱离。完全性玻璃体后脱离不与眼球后极部球壁回声相连，运动时表现为自眼球壁一侧向另一侧的波浪状推进的运动；不完全性玻璃体后脱离可与视盘或黄斑以及后极部任意一点或多点相固着，运动试验及后运动试验均阳性。玻璃体后脱离在彩色多普勒血流成像检查均无异常血流信号发现。结论超声检查可以准确地诊断玻璃体后脱离，为临床诊断和手术治疗提供客观依据．

Diagnosis and analysis in posterior vitreous detachment by ultrasonography

Objective To discuss the diagnosis characteristics and clinical value of posterior vitreous detachment (PVD) by color Doppler flow imaging(CDFI). Methods One thousand and two cases were examed by CDFI for the diagnosis standard and property of PVD. Results Typical acoustic properties of PVD: the B scan may show a very fluid thick line. There were two types complete PVD and part PVD based on the vitreous separated from the optic nerve. Kinetic echography typically showed a very fluid, undulating after movement of the completely PVD. Part PVD had more than one dot with attachments to the retina and less mobile than complete PVD. There was not blood flow signal on the PVD by CDFI. Conclusions Ultrasonography for PVD not only exactitudes,but also provides foundation for clinic.