Bilateral subcostal transversus abdominis plane block does not improve the postoperative analgesia provided by multimodal analgesia after laparoscopic cholecystectomy: A randomised placebo-controlled trial.

BACKGROUND: Laparoscopic cholecystectomy might be considered minor surgery, but it may result in severe postoperative pain. Subcostal transversus abdominis plane (TAP) block, which produces long-lasting supra-umbilical parietal analgesia, might improve analgesia after laparoscopic cholecystectomy. OBJECTIVE: We investigated whether subcostal TAP block would reduce opioid consumption and pain after laparoscopic cholecystectomy in patients provided with multimodal analgesia. DESIGN: A randomised, placebo-controlled, double-blind study. SETTING: The study was conducted at a university teaching hospital from December 2017 to June 2018. PATIENTS: Sixty patients scheduled for laparoscopic cholecystectomy were included. Anaesthesia and postoperative analgesia (etoricoxib, paracetamol, ketamine and dexamethasone) were standardised. INTERVENTION: After induction of anaesthesia, patients were allocated into two groups: ultrasound-guided bilateral subcostal TAP block with 20 ml of levobupivacaine 0.375% and epinephrine 5 µg ml or 0.9% saline with epinephrine 5 µg ml. MAIN OUTCOME MEASURES: Opioid consumption in the recovery room and during the first 24 h after surgery were recorded. Postoperative somatic and visceral pain scores, fatigue and nausea were measured. Intra-operative end-tidal concentrations of sevoflurane (FETSEVO) were also recorded. RESULTS: Twenty-four hour postoperative opioid consumption were similar in both groups: 21.2 mg (95% CI 15.3 to 27.1) vs. 25.2 (95% CI 15.1 to 35.5) oral morphine equivalent in the levobupivacaine and 0.9% saline groups, respectively; P = 0.48. No significant between-group differences were observed with regards to parietal (P = 0.56) and visceral (P = 0.50) pain scores, fatigue and nausea. FETSEVO was slightly lower in the levobupivacaine group (P < 0.01). CONCLUSION: Subcostal TAP block does not improve the analgesia provided by multimodal analgesia after laparoscopic cholecystectomy. It allows for a small reduction in intra-operative sevoflurane requirements. TRIAL REGISTRATION: NCT0339153.