Ultrasound-Guided Erector Spinae Plane Block for Postoperative Analgesia in Patients Undergoing Open Radical Prostatectomy: A Randomized, Placebo-Controlled Trial

Abstract

Study objective: The aim of this study was to evaluate the effect of ultrasound-guided erector spinae plane (ESP) block on postoperative pain in radical prostatectomy, which leads to both visceral and somatic pain. Design: Prospective, randomized, placebo controlled, double-blinded. Setting: University hospital. Patients: A total of ASA I-III, 50 patients aged 18-65 who were scheduled for elective open radical prostatectomy surgery. Interventions: Patients were randomly allocated to receive an ultrasound-guided ESP block, with either local anesthetic (10 mL of 1% lidocaine +10 mL of 0.5% bupivacaine) or placebo bilaterally. Measurements: The primary outcome was morphine consumption in the first 24 h after surgery. The secondary outcomes were NRS pain scores at rest and coughing, intraoperative remifentanil consumption and need for rescue analgesic during the first 24 h after surgery. Main results: Both NRS scores for post-anesthesia care unit and NRSrest scores for 1st hours were lower in Group ESPB (p < 0.001 and p = 0.033, respectively). Cumulative morphine consumption at 24 h post-surgery was similar between the groups (p = 0.447). Rescue analgesic requirement was higher in the placebo injection group than in the ESPB group at the 1st postoperative hour (p = 0.002). Conclusions: In open radical prostatectomies, except for the first hour, ESP block is ineffective for pain scores and on morphine consumption compared to the placebo injection group in the postoperative period.