Evaluation of the Efficacy of the Illioinguinal-Illiohypogastric Nerve Block on Postoperative Pain Control in Cesarean Section
Background: Postoperative pain management is a critical aspect of recovery after cesarean section, impacting maternal comfort, early mobilization, and breastfeeding. The ilioinguinal-iliohypogastric nerve block has been proposed as a regional anesthesia technique to reduce postoperative pain. However, its efficacy remains under investigation, with conflicting evidence regarding its benefits. This study aims to evaluate the effectiveness of the ilioinguinal-iliohypogastric nerve block in controlling postoperative pain in women undergoing cesarean section. Method and Materials: This clinical trial study was conducted in 2025 on 66 pregnant mothers who were candidates for cesarean section. The samples were selected by convenience sampling and randomly divided into two equal groups. After antagonizing the neuromuscular block with intravenous neostigmine 0.04 mg/kg and atropine 0.02 mg/kg, before extubation, a II-IH nerve block was performed in group I (II-IH block), and patients received a sham block with saline solution at the corresponding puncture site in group II (sham block). The patient's vital signs (such as blood pressure, heart rate, and body temperature), complications, and postoperative pain intensity were measured in the patients. Results: The study demonstrated that intraoperative vital signs such as heart rate and oxygen saturation did not differ significantly between the nerve block and sham groups, nor across different age and BMI subgroups, underscoring the safety of the procedure during surgery. Postoperative pain assessments revealed that pain scores increased over time, with the highest severity observed at 6 hours post-surgery, where nearly half of the patients experienced moderate pain (score of 5). The distribution of pain scores suggests that the nerve block did not significantly alter the pain trajectory compared to the control group. Adverse effects were frequently observed, with bleeding being the most common complication (about 41%), followed by nausea (17%), hypotension, and headache. The incidence of bradycardia remained low, around 10%. Analgesic use was predominantly with Tramadol, and the groups were evenly balanced in terms of demographic and clinical characteristics, supporting the validity of the comparison. Conclusion: Overall, the results indicate that while the nerve block is safe, its efficacy in reducing postoperative pain remains inconclusive in this study.