眼动脉与颈内动脉床突段的动脉瘤,通常体积较大、邻近解剖结构复杂且瘤体与周围组织粘连,故成为神经外科手术的难点。对于眼动脉颅内段的起源、起点、走行、直径及分类等方面的研究表明,眼动脉大多起源于颈内动脉,从其眼动脉段的前壁内1/3发出,于视神经下方沿前外侧方向进入视神经管;眼动脉起点处直径在1.1~2.8mm之间;眼动脉的最常见类型为硬膜内型,其中又以距远侧硬膜环1mm以内者居多。 Ocular and internal carotid artery aneurysm bed segment, usually larger, adjacent to the anatomical structure of the tumor and the surrounding tissue adhesions, it becomes a neurosurgical difficulties. For the origin, starting point, walking, diameter and classification of intracranial segments of ophthalmic artery, studies have shown that most of the ophthalmic arteries originate from the internal carotid artery and emit 1/3 from the anterior wall of the segment of the ophthalmic artery. The lateral direction into the optic canal; the diameter of the starting point of the ophthalmic artery between 1.1 ~ 2.8mm; the most common type of ophthalmic intradural, which in turn from the distal dural ring within 1mm.