Comparison of the Effect of Ketamine and Dexmedetomidine Combined with Total Intravenous Anesthesia in Laparoscopic Cholecystectomy Procedures: A Prospective Randomized Controlled Study

比较氯胺酮和右美托咪定联合全静脉麻醉在腹腔镜胆囊切除术中的效果：一项前瞻性随机对照研究