Abdominal muscles infiltration analgesia for donor-site pain in autologous ear reconstruction: A randomized controlled clinical trial

Costal cartilage donor-site pain is an adverse effect of autologous ear reconstruction. This study aimed to introduce rectus abdominis and external oblique muscle infiltration analgesia (RAM+EOM-IA) for costal cartilage donor-site pain and evaluate its efficacy and safety. The study was a randomized controlled clinical trial. Patients were randomized between intermittent RAM+EOM-IA combined with intravenous patient-controlled anesthesia (IPCA) and IPCA alone. Thirty patients were followed in the RAM+EOM-IA combined with the IPCA group and 30 patients in the IPCA alone group. The primary outcome was the numerical rating score (NRS) of pain recorded during 48 h postoperatively. Secondary outcomes included the Barthel index (BI) and rescue analgesic consumption. Sensory block areas were tested using a cold stimulus. NRS was significantly lower with RAM+EOM-IA combined with IPCA than with IPCA alone at 28 h (P