Quadratus Lumborum Block : Effect on Acute Pain and Quality of Recovery After Laparoscopic Renal Surgery

This prospective, randomized study,control study aims to compare the analgesic effect,opioids consumption,quality of recovery,length of hospital stay and incidence of chronic pain,et al. between single-injection QLB(quadratus lumborum block)+ intravenous patient-controlled analgesia (IPCA) and intravenous patient-controlled analgesia (IPCA) alone in patients undergoing laparoscopic renal surgeries.

Inclusion Criteria:

• Age 18-70 yrs
• American Society of Anesthesiologists physical statusⅠ-Ⅲ
• Undergo laparoscopic nephrectomy
• Informed consent

Exclusion Criteria:

• A known allergy to the drugs being used
• Coagulopathy, on anticoagulants
• Analgesics intake, history of substance abuse
• Participating in the investigation of another experimental agent
• Inability to properly describe postoperative pain to investigators (eg, language barrier, neuropsychiatric disorder)