Effect of bilateral ultrasound-guided erector spinae blocks on postoperative pain and opioid use after lumbar spine surgery: A prospective randomized controlled trial

Abstract

ABSTRACT Background: The control of postoperative pain following major lumbar spine surgeries remains a major challenge for anesthesiologists, and many new strategies and methods have been developed for pain control. This study’s main objective was to evaluate the efficacy of the bilateral ultrasound-guided erector spinae plane block (US-ESPB) as a method for perioperative pain management in patients undergoing lumbar spine surgeries. Methods: This double-blinded prospective randomised controlled study was conducted on 140 patients aged between 18 and 65 years; all were scheduled for elective lumbar spine surgeries. Patients were randomly allocated into one of the two groups: the ESPB group (n = 70) or the control group (n = 70). All patients received bilateral US-ESPB after induction of general anaesthesia, in the ESPB group; 20 mL of levobupivacaine 0.25% were used, while 20 mL normal saline was given to the control group instead. The primary endpoint was the total amount of morphine consumed during the intraoperative and the first 24 postoperative hours. Secondary endpoints included, time to first request of rescue analgesia as well as incidence of adverse effects. Results: The total amount of morphine consumed during the intraoperative and the first 24 postoperative hours was found to be significantly lower in the ESPB group compared to the control group (P < 0.001). Moreover, the time to first analgesic request was significantly longer in patients receiving ESPB as analgesia (P < 0.001). No statistically significant differences were observed between the two groups regarding complications. Conclusion: Bilateral US-ESPB is useful intervention for providing adequate pain management in lumbar spine surgeries.