Fu J, Liang Y, Zhang Y
Department of Ultrasound, People's Hospital, Beijing Medical University.
Zhonghua Yan Ke Za Zhi. 1997 Mar;33(2):96-9.
To investigate ocular hemodynamics with color Doppler imaging, in low-tension glaucoma.
Nineteen patients with low-tension glaucoma (LTG) and 15 normal subjects were studied. The peak systolic velocity (Vmax), the end diastolic velocity (Vmin), the mean-enveloped velocity (Vmean), the pulse index (PI), the resistance index (RI) and S/D (Vmax/Vmin) of the ophthalmic artery (OA), the short posterior ciliary arteries (SPCA) and the central retinal artery (CRA) were compared in the two groups.
(1) Compared with the normal subjects, the patients with LTG showed a decreased Vmax and Vmin in SPCA in bilateral eyes and Vmean in the right eye (P < 0.05), and a decreased RI and S/D in the left eye (P < 0.05). (2) Vmax and Vmean of CRA in LTG were lower than that in normal subjects (P < 0.01). (3) All six blood flow parameters of OA in the two groups were not significantly different from each other.
Blood flow velocity of SPCA in LTG was lower than that in the normal subjects. The results support the theory that LTG is induced by the perfusion impairment of optic nerve head.
采用彩色多普勒成像技术研究低眼压性青光眼的眼部血流动力学。
对19例低眼压性青光眼（LTG）患者和15名正常受试者进行研究。比较两组患者眼动脉（OA）、睫状后短动脉（SPCA）和视网膜中央动脉（CRA）的收缩期峰值流速（Vmax）、舒张末期流速（Vmin）、平均血流速度（Vmean）、搏动指数（PI）、阻力指数（RI）以及S/D（Vmax/Vmin）。
（1）与正常受试者相比，LTG患者双眼SPCA的Vmax和Vmin以及右眼的Vmean降低（P<0.05），左眼的RI和S/D降低（P<0.05）。（2）LTG患者CRA的Vmax和Vmean低于正常受试者（P<0.01）。（3）两组患者OA的所有六项血流参数彼此之间无显著差异。
LTG患者SPCA的血流速度低于正常受试者。这些结果支持低眼压性青光眼是由视神经乳头灌注受损所致的理论。
