Analgesic efficacy of quadratus lumborum block in patients undergoing nephrectomy: A systematic review and meta-analysis.

Single-shot QLB provided a statistically significant, but clinically-small improvement in postoperative analgesia and recovery for patients undergoing nephrectomy. The QLB would be beneficial as part of multimodal analgesia. Future research may need to determine which approach of QLB is superior for postoperative analgesia after nephrectomy.