Eida H, Bhutto I A, Amemiya T
Department of Ophthalmology, Nagasaki University School of Medicine, Japan.
Ital J Anat Embryol. 2001;106(2 Suppl 1):245-50.
No previous attempt has been made so to demonstrate the details of the choroid vascularization in the rat. This paper describes the choroidal vascular pattern of the normal Wistar Kyoto rat using the corrosion cast method. 6-month-old normal Wistar Kyoto rats were used. Vascular casts prepared by our previously described technique were observed with a Hitachi S-2360N scanning electron microscope. Corrosion casts of the entire choroidal vasculature showed that the ophthalmic artery branched into two main ciliary arteries: the nasal and temporal arteries, which extend forward to form the iridociliary circle. Further the inferior ciliary artery arises from the temporal ciliary artery. In the posterior eye segment these arteries form four to seven branches supplying the adjacent choriocapillaris. There are different arrangements of choriocapillaris. The larger veins formed four vortex veins, one in each quadrant, draining blood from the anterior region of the choroid or iris. Venous blood from the central region, peripapillary choroid and sometimes optic nerve head is drained by smaller veins, which run more or less directly into the posterior ciliary veins. In conclusion corrosion casts and SEM can show the details of the choroidal vascular architecture. These three-dimensional (3-D) findings of choroidal vessels of the rat are very useful for the study of choroid vascular abnormalities in various pathological conditions.
此前尚未有人尝试如此详细地展示大鼠脉络膜血管化的细节。本文采用铸型腐蚀法描述了正常Wistar Kyoto大鼠的脉络膜血管模式。使用6月龄的正常Wistar Kyoto大鼠。用我们之前描述的技术制备的血管铸型，通过日立S-2360N扫描电子显微镜进行观察。整个脉络膜血管系统的铸型腐蚀显示，眼动脉分支为两条主要的睫状动脉：鼻侧动脉和颞侧动脉，它们向前延伸形成虹膜睫状体环。此外，睫状下动脉起源于颞侧睫状动脉。在眼后段，这些动脉形成4至7个分支，为相邻的脉络膜毛细血管供血。脉络膜毛细血管有不同的排列方式。较大的静脉形成四条涡静脉，每个象限一条，引流脉络膜前部或虹膜的血液。来自中央区域、视乳头周围脉络膜以及有时还有视神经乳头的静脉血由较小的静脉引流，这些静脉或多或少直接汇入睫状后静脉。总之，铸型腐蚀和扫描电子显微镜可以显示脉络膜血管结构的细节。大鼠脉络膜血管的这些三维（3-D）发现对于研究各种病理状况下的脉络膜血管异常非常有用。
