Cadaver anatomy for the safety of sacrocolpopexy

ZHANG Xiao-wei; CHEN Li-quan

Abstract：Objective To supply applied anatomical data for the safety of sacrocolpopexy. Methods Detailed dissections of the presacral space were performed in 16 adult female cadavers after injection of different color perfusate into the inferior vena cava and lilac artery. Observe and measure the composition of presacral space, the presacral space and the distance around the main structure. Results The location of the median sacral vessels were various, 43.75% through the midpoint of sacral promontory while 56.25% through the midline of sacrum. The location of the first transverse veins were great various. The normal group(Ⅰ type)constituted 73.33%, located on the first transverse lines of sacrum. The group of variation(Ⅱ type) occupies 26.67% ,located 10ram below the sacral promontory. The height of sacral vertebral, the distance of anterior sacral foramina, the space between presacral transverse veins was declining from S1 ～ S5 (P < 0.05). The distance between median sacral vessel and the anterior sacral foramina was declining from S1 ～ S5 (P < 0.05) ; At the level of sacral promontory and the first anterior sacral foramina, the vessel which nearest to the median sa-cral were the fight internal iliac vein. Conclusion The presacral space of S, has the largest avascular zone,which is the relatively safe area of fixation position for sacrocolpopexy. The relative safety area is a rectangle which upper bound is 10mm under sacral promontory and lower bound is 40ram under with 15 mm in width, which rectangle is (30mm × 15 mm).