Analgesic effects of intrathecal bupivacaine with neostigmine or morphine among elective surgical patients in selected comprehensive specialised hospitals, Southern Ethiopia: a prospective cohort study

在埃塞俄比亚南部部分综合专科医院中，择期手术患者鞘内注射布比卡因联合新斯的明或吗啡的镇痛效果：一项前瞻性队列研究