目的探讨横窦引流小脑桥静脉的形态特点及其临床意义。方法运用显微解剖与铸型方法观察60例(120侧)成人头颅的湿标本与24例胎儿及幼儿脑静脉的血管铸型。结果根据进入小脑幕位置的不同,小脑桥静脉可分成窦汇组、小脑幕组和岩部组;三组桥静脉数量相仿(P>0.05),桥静脉直径分别为(1.7±0.8)mm、(2.0±0.8)mm和(2.2±0.8)mm。窦汇组中,7%的标本没有小脑桥静脉;小脑幕组中,13%的标本没有桥静脉;显微解剖的标本每侧有超过1根岩部组小脑桥静脉。结论在脑幕下手术,选择旁正中手术路径对小脑桥静脉损伤几率最小。 Objective To investigate the morphological characteristics and clinical significance of transverse sinus drainage of the cerebellopontine vein. Methods Sixty cases (120 sides) of adult skulls and 24 cases of fetal and preschool cerebral veins were observed with microdissection and cast method. Results According to the location of the cerebellar tentorium, the cerebellopontine cords could be divided into the sinusoid group, the cerebellum group and the rock group. The numbers of the bridge vessels in the three groups were similar (P> 0.05), the diameter of the bridge veins were (1.7 ± 0.8) mm, 2.0 ± 0.8) mm and (2.2 ± 0.8) mm. In the sinus junction group, 7% of the specimens did not have a CPB; in the cerebellar group, 13% had no BRs; and on each side of the microdissection, there was more than 1 in the MCC. Conclusions Under the surgery of the head and shoulders, the path of paravertebral midline operation has the least damage to the cerebellopontine vein.