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目的 研究视交叉池的结构特征及其手术意义。方法 在手术显微镜下观测15个头颅标本视交叉池的显微解剖。结果 视交叉池的上壁主要是视神经、视交叉及视神经间的蛛网膜,下壁为覆盖鞍膈和鞍结节的蛛网膜,池前缘上、下壁锐角交融。池内常有大量密集的纤维小梁,纵横交锗,构成纤维网复合体,可形成多种网样结构,仅50%的视交叉池与颈动脉池间存在“隔膜”。结论 视交叉池并不包绕视交叉,以致密而复杂的纤维网复合体为特征,手术中不可强行撕拉,宜在妥善保留小血管的同时小心剪开。垂体柄与视交叉的交接处常有纤维网与小动脉缠结,术中要小心。
Objective To study the structural characteristics of optic chiasm pool and its operative significance. Methods The microscopic anatomy of the optic chiasm in 15 skull specimens was observed under a surgical microscope. Results The upper wall of the optic chiasm was mainly composed of the optic nerve, the optic chiasm and the arachnoid between the optic nerves. The lower wall was the arachnoid covering the saddle diaphragm and the saddle nodules. The upper and lower walls of the lap pool merged acutely. The pool often has a large number of dense fiber trabecular, vertical and horizontal cross-germanium, constitute a complex network of fibers, can form a variety of network-like structure, only 50% of the optic chiasm pool and carotid artery pool “diaphragm.” Conclusion The optic chiasm does not enclose the optic chiasm and is characterized by a dense and complex fibrous network complex that can not be severed during surgery. It is advisable to cut carefully while keeping small blood vessels properly. Pituitary stalk and the optic chiasm at the junction often fibrous tangles and arterioles, surgery be careful.