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目的：研究骶前区静脉丛（Ｖｅｎｏｕｓ ｐｌｅｘｕｓ ｏｆ ｐｒｅｓａｃｒａｌ ｒｅｇｉｏｎ ，ＶＰＰＳＲ） 的解剖学特点，为骶前区静脉破裂大出血的防治提供解剖学基础。方法：在３４ 具成人尸体上，分虽观测ＶＰＰＳＲ 的组成、管壁、瓣膜、长度及直径。结果：ＶＰＰＳＲ 管壁薄、缺少静脉瓣，呈网状。ＶＰＰＳＲ Ｓ１～５ 横干的长度和直径（ Ｆ 检验） 均有显著差异，Ｐ＜ ０ ．０５ 。其长度平均（ 珋ｘ ±ｓ） ：Ｓ１ 为３ ．２ ±１ ．５ ｃｍ ，Ｓ２ 为４ ．４ ±１ ．０ ｃｍ ，Ｓ３ 为３ ．５ ±１ ．１ ｃｍ ，Ｓ４ 为２ ．３ ±０ ．９ ｃｍ ，Ｓ５ 为１ ．０ ±０ ．３ ｃｍ ；其直径平均（珋ｘ ±ｓ） ：Ｓ１ 为１ ．２ ±０ ．７ ｍ ｍ ，Ｓ２ 为２ ．５ ±１ ．５ ｍ ｍ ，Ｓ３ 为２ ．５ ±１ ．５ ｍ ｍ ，Ｓ４为１ ．７ ±１ ．５ ｍ ｍ ，Ｓ５ 为０ ．９ ±０ ．６ ｍ ｍ 。Ｓ４ 椎体前穿通支静脉口径２ ～４ ｍ ｍ 占８ ．８ ％ ，０ ．１ ～１ ．９ ｍ ｍ 占９１ ．２ ％ 。结论：ＶＰＰＳＲ 解剖变异多、血管壁薄、缺少静脉瓣是引起ＶＰＰＳＲ 损伤大出血甚至死亡的解剖学基础。
Objective: To study the anatomic features of venous plexus of presacral region (VPPSR) in presacral region and provide anatomic basis for the prevention and treatment of venous rupture in presacral region. Methods: In 34 adult cadavers, the composition, wall, valve, length and diameter of VPPSR were observed. Results: VPPSR tube wall thin, the lack of venous valve was reticular. VPPSR S1 ~ 5 transverse length and diameter (F test) were significantly different, P <0. 05. The average length (珋 x ± s): S1 is 3. 2 ± 1. 5 cm, S2 is 4. 4 ± 1. 0 cm, S3 is 3. 5 ± 1. 1 cm, S4 is 2. 3 ± 0. 9 cm, S5 is 1. 0 ± 0. 3 cm; its average diameter (珋 x ± s): S1 is 1. 2 ± 0. 7 m m, S2 is 2. 5 ± 1. 5 m m, S3 is 2. 5 ± 1. 5 m m, S4 is 1. 7 ± 1. 5 m m, S5 is 0. 9 ± 0. 6 m m. S4 vertebral anterior perforating branch vein caliber 2 ~ 4 m m accounted for 8. 8%, 0. 1 ~ 1. 9 m m accounted for 91. 2%. Conclusion: There are many anatomical variations of VPPSR, thin blood vessel wall and lack of venous flap, which are anatomical basis of hemorrhage and even death of VPPSR.