Evaluation of dexmedetomidine in combination with sufentanil or butorphanol for postoperative analgesia in patients undergoing laparoscopic resection of gastrointestinal tumors: A quasi-experimental trial.
Comparison of dexmedetomidine in combination with sufentanil or butorphanol for postoperative analgesia in patients with laparoscopic resection of gastrointestinal tumors: A quasi-experimental trial.