Introduction
quadratus lumborum block, postoperative pain, overweight, TAPB
SEVERE OBESITY
According to the definition by WHO, overweight is a body mass index (BMI) ≥ 25 kg/mBariatric surgery is a promising intervention for people with severe obesity. It profoundly improves the comorbidities and reduces the overall mortality during the long-term follow-up [To efficiently relieve postoperative pain, peripheral neural blocks have been applied in the multimodal analgesia management for bariatric surgery. Evidence suggests that transverse abdominis plane block (TAPB) and quadratus lumborum block (QLB) can significantly reduce postoperative pain following abdominal surgery [