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目的为经胼胝体穹窿间入路切除第三脑室病变提供形态学依据。方法手术显微镜下在12例(24侧)国人尸头上模仿了经胼胝体穹窿间入路的手术操作,观察并测量相关数据。结果冠矢点位于眉间上(126.10±9.50)mm,中央沟前(43.02±7.00)mm,额静脉在冠状缝前后的2 cm范围内19支(占79.2%),该静脉向前2~3 cm内桥静脉稀疏;在冠矢点与室间孔的连线(PoCS-FM)上冠矢点至胼胝体上缘的距离为(40.81±6.99)mm,冠矢点至扣带沟的距离(29.04±6.61)mm;在PoCS-FM上胼胝体的厚度为(7.15±1.96)mm;透明隔平均厚度为(1.73±0.71)mm,透明隔间腔3例,较易分开透明隔两叶的7例,不能分开2例;经胼胝体穹窿间入路的显露范围为(16.87±4.19)mm,和穹窿的位置有关。结论穹窿间入路操作相对简单快捷,可以直视下操作,无需过度牵拉,即可看到双侧重要结构,适用于较大肿瘤的切除。
Objective To provide morphological evidence for the removal of third ventricle lesions through the corpus callosum. Methods Under the operation microscope, 12 cases (24 sides) of the cadaver head cadaver mimicked the corpus callosum intervertebral approach operation, observation and measurement of relevant data. Results The mean coronary angle was (126.10 ± 9.50) mm in front of the glabella and (43.02 ± 7.00) mm in front of the central sulcus, 19 (79.2%) in 2 cm before and after the coronary vein, (40.81 ± 6.99) mm from the point of coronary artery to the upper margin of corpus callosum at PoCS-FM. The distance from the point of coronary artery to the cingulate groove (29.04 ± 6.61) mm. The thickness of the corpus callosum on PoCS-FM was (7.15 ± 1.96) mm. The average thickness of the transseptal septum was (1.73 ± 0.71) mm. There were 3 cases of clear compartment, 7 cases, can not be separated in 2 cases; the corpus callosum between the posterior fornix revealed the range of (16.87 ± 4.19) mm, and the location of the dome. Conclusion The approach between the fornixes is relatively simple and quick. It can be operated under direct vision and can be seen without significant distraction. It is suitable for the resection of larger tumors.