传统的骶管阻滞是经骶裂孔穿刺,而正常人约有2 0 %的骶管呈解剖学异常,骶裂孔畸形或闭锁者占10 %,使骶管阻滞失败率高。小儿的骶骨12岁前尚未完全愈合,各椎体间由韧带或致密的结缔组织结合[1 ] 。我院自1998年～2 0 0 2年采用经骶3～骶4间隙垂直穿刺,操作简单,效果满意,现报告 The traditional sacral block is punctured by the sacrococcygeal hole, while about 20% of normal normal sacral anatomical abnormalities, sacral hole malformations or atresia accounted for 10% of the caudal block failure rate. Pediatric sacral 12 years ago has not completely healed, the vertebral body by the ligament or dense connective tissue [1]. Our hospital from 1998 to 2002 by the sacral 3 ~ sacral 4 vertical puncture, the operation is simple, the results are satisfactory, the report