Tranquart F, Arsene S, Aubert-Urena A S, Desbois I, Audrerie C, Rossazza C, Pourcelot L
Nuclear Medicine and Ultrasound Department, Centre Hospitalier Universitaire Bretonneau, Tours, France.
J Clin Ultrasound. 1998 Mar-Apr;26(3):119-24. doi: 10.1002/(sici)1097-0096(199803/04)26:3<119::aid-jcu2>3.0.co;2-p.
We assessed the usefulness of color Doppler imaging and spectral analysis in monitoring the effect of isovolemic hemodilution on retinal vein occlusion.
Color Doppler imaging was used to measure the systolic and diastolic blood flow velocities and the resistance index (RI) in the central retinal artery and the maximum and minimum blood flow velocities in the central retinal vein of affected eyes and contralateral unaffected eyes before and 1 day after isovolemic hemodilution in 70 adults (40 men and 30 women; mean age, 62.4 +/- 13.7 years) who presented with retinal vein occlusion.
With hemodilution, the hematocrit value was decreased from 41.8 +/- 3.0 to 33.0 +/- 3.0. In central retinal vein occlusion, the pretreatment arterial and venous flow velocities of affected eyes were significantly lower than those of unaffected eyes. After hemodilution in eyes affected by ischemic occlusion, a significant improvement in the RI in the central retinal artery was observed without changes in venous flow velocity. After hemodilution in eyes affected by non-ischemic occlusion, a significant increase in maximal venous flow velocity only was noted. In branch retinal vein occlusion, no significant difference was observed in the RI between affected and unaffected eyes. After hemodilution, an improvement in RI was noted only for affected eyes.
The present results confirm the potential value of Doppler analysis in monitoring the impact of hemodilution on arterial and venous velocity in patients with central retinal vein occlusion.
我们评估了彩色多普勒成像和频谱分析在监测等容血液稀释对视网膜静脉阻塞影响方面的实用性。
对70例（40例男性和30例女性；平均年龄62.4±13.7岁）视网膜静脉阻塞患者，在等容血液稀释前及稀释后1天，使用彩色多普勒成像测量患眼及对侧未患眼视网膜中央动脉的收缩期和舒张期血流速度以及阻力指数（RI），以及视网膜中央静脉的最大和最小血流速度。
血液稀释后，血细胞比容值从41.8±3.0降至33.0±3.0。在视网膜中央静脉阻塞中，患眼的预处理动脉和静脉血流速度显著低于未患眼。在缺血性阻塞患眼中进行血液稀释后，观察到视网膜中央动脉的RI有显著改善，而静脉血流速度无变化。在非缺血性阻塞患眼中进行血液稀释后，仅观察到最大静脉血流速度显著增加。在视网膜分支静脉阻塞中，患眼和未患眼的RI无显著差异。血液稀释后，仅患眼的RI有所改善。
目前的结果证实了多普勒分析在监测血液稀释对视网膜中央静脉阻塞患者动脉和静脉速度影响方面的潜在价值。
