Group A was used the needle core of trocar of 22G or 24G for single spinal anesthesia, and group B was used ketamine for intravenous anesthesia.

• A组用22G或24G国际通用型号静脉套管针针芯行腰麻,B组以氯胺酮行全凭静脉麻醉, 术中均辅以咪达唑仑镇静。