低浓度舒芬太尼联合曲马多在老年患者术后静脉镇痛的疗效观察
저농도서분태니연합곡마다재노년환자술후정맥진통적료효관찰
Effect observation of low concentrations of Sufentanil combined Tramadol in postoperative intravenous analgesia for elderly patients
저자의 최근 논문