Comparing epidural and wound infiltration analgesia for total abdominal hysterectomy: A randomised controlled study

BACKGROUND AND AIMS: Continuous wound infiltration (CWI) is emerging as an alternative to continuous epidural infusion (CEI). This study compared postoperative pain scores of CEI with CWI in patients undergoing total abdominal hysterectomy (TAH). METHODS: This prospective randomised controlled trial included 102 patients planned for TAH who were randomised into either Group E (CEI) or Group L (CWI). The catheter (epidural/wound infiltration) was inserted in Group E before induction) and Group L at the end of surgery. General anaesthesia was administered according to standard protocol. At the end of surgery, both groups received 10 mL bolus of 0.2% ropivacaine followed by infusion at 6 mL/h through the respective catheters. They also received intravenous patient-controlled analgesia with morphine. The primary outcome was the visual analogue score at rest (VAS(R)) and at deep breathing (VAS(DB)) post-operatively. Secondary outcomes were post-operative morphine consumption, side effects and patient satisfaction. RESULTS: The mean VAS(R) between two groups were comparable up to 8 h. Group E showed significantly reduced VAS(R) compared to Group L at 12 h (2.32 ± 0.59 vs 2.62 ± 0.67, P = 0.019) and 24 h (2.30 ± 0.58 vs 2.62 ± 0.57, P = 0.006). Group E showed significantly reduced VAS(DB) compared to Group L at 5 min and from 4 to 24 h. Total morphine consumption, side effects and patient satisfaction were comparable. CONCLUSION: We conclude that CEI is a superior analgesic technique compared to CWI in total abdominal hysterectomy in terms of reduced pain scores.