Objective The success rate and adverse effects and the relationship between volume and effects of pediatric caudal anesthesia were reported in a retrospective study of 751 pediatric cases.

Cognition on some problems about sacral canal injection;

MRI diagnosis of Sacral canal arachnoid cysts;

Objective To explore the clinical characteristics and the treatment of arachnoid cysts in sacral canal.

25% , for caudal anesthesia in children.

Objective To observe the clinical efficacy of instillation of sacral canal for the treatment of lumbar disc herniation.

Clinical research of ropivacaine supplemented with midazolam for sacral block in pediatric operation;

Clinical evaluation of Shujin Zhitong decoction with sacral block in the treatment of lumbar intervertebral disc prolapse;

Value of magnesium sulfate and/or valium in preventing local anesthetic toxicicity of sacral block;