Perioperative Use of Intravenous Lidocaine Infusion to Decrease Postoperative Opioids in Colorectal Surgery: A Randomized Prospective Study

Pain is defined as an unpleasant sensory and emotional sensation provoked by real tissue damage and manifested by autonomic, psychological, and behavioral reactions. Improvement of postoperative pain control remains a significant challenge among clinicians. 40 patients aged 30-60 years, ASA 1-2 scheduled for colorectal surgery, were divided into two groups 20 patients each. Lidocaine group: (n= 20) received bolus intravenous lidocaine 20 min before incision with a dose of 1.5mg/kg followed by lidocaine infusion with a dose of 1.5mg/kg/h. Control group: (n= 20) receive intravenous lidocaine only. After premedication with a bolus dose of lidocaine at induction, the heart rate was lower in the interventional group compared with the control one until 12 hours post-operatively, then returned to be equal by 24 hours. Between recovery and one hour postoperative, intraoperative serial differences were significant only for the intervention group. After premedication and during the operation until 24 hours, postoperative mean blood pressure was significantly higher among controls. This returns to be equal by 48 hours and beyond. The postoperative VAS score and analgesic requirements were significantly lower in the lidocaine infusion group. Perioperative lidocaine infusion provides analgesia, low pain score, and decreases postoperative opioid consumption in laparoscopic colorectal surgery.