Comparison of the Suppressive Effects of Tramadol and Low-dose Ketamine on the Patients with Postoperative Hyperalge- sia after Remifentanil-based Anaesthesia

YU Cong1,LUO Yu-lin1,XIAO Shui-sheng2,LI Yong2,ZHANG Qing1

West China Journal of Stomatology . 2005, (05): 404 -406 .