眼动脉的解剖变异及临床意义

目的:观察眼动脉的变异情况及其临床意义。方法:手术显微镜下解剖15例(30侧)福尔马林固定标本的眼动脉起始,观察眼动脉起始位置,起始处与脑膜环的关系,眼动脉与脑膜中动脉的交通支情况。结果:有93.3%的眼动脉起始自颈内动脉,6.7%眼动脉起始自脑膜中动脉。其中53.3%起始于硬脑膜下,30%起始于远侧硬膜环上,而起始于床突段的占6.7%,海绵窦段占3.3%。眼动脉与脑膜中动脉间存在交通支的占25%。结论:眼动脉起源存在变异及异常交通支,在行上颌动脉栓塞前要评估是否存在这些变异。

Anatomic variation of ophthalmic artery and its clinical significance

Objective:To investigate anatomic variation of ophthalmic artery and its clinical significance. Methods: Through anatomic dissection under operation microscope, the origin and location of ophthalmic artery,its relation with the dural ring, communicating branches between it and middle meningeal arteries were examined and analyzed in 15 cases (30 sides) formalin-fixed specimens. Results: 93.3% of ophthalmic arteries originated from internal carotid artery, while 6.7% from middle meningeal artery. Ophthalmic artery originated from the internal carotid artery within the intradural space in 53.3% of cases, just above the upper dural ring in 30%, at the clinoid segment in 6.7%, and within the cavernous sinus in 3.3%. 25% of cases presented communicating branches between ophthalmic arteries and middle meningeal arteries. Conclusions:The origin of ophthalmic artery is variable. It usually gives off abnormal communicating branches, which should be evaluated before embolismic operation of maxillary artery.