# Quadratus Lumborum Block Versus Transversus Abdominis Plane Block in Laparoscopic Colorectal Surgery: A Systematic Review and Meta-Analysis

## TL;DR

This study compares two pain management techniques after colorectal surgery and finds no major difference in opioid use, but one method offers short-term pain relief benefits.

## Contribution

The study provides a meta-analysis comparing analgesic efficacy of QLB and TAPB in laparoscopic colorectal surgery, revealing transient early pain relief advantages of QLB.

## Key findings

- QLB showed better transient pain relief at rest at 12 hours and during movement at 6 hours.
- QLB was associated with shorter surgery duration but no significant difference in opioid consumption or hospital stay.
- No significant differences were found in postoperative opioid consumption between QLB and TAPB.

## Abstract

Background and Objectives: Effective pain control after laparoscopic colorectal surgery is crucial for Enhanced Recovery After Surgery (ERAS) protocols. The transversus abdominis plane block (TAPB) provides somatic analgesia but lacks visceral coverage. The quadratus lumborum block (QLB) has emerged as an alternative, potentially offering both somatic and visceral blockade, but its superiority is debated. This systematic review and meta-analysis aimed to compare the analgesic efficacy of QLB versus TAPB in this setting. Materials and Methods: A comprehensive search of PubMed, Scopus, CENTRAL, and Web of Science was conducted for randomized controlled trials (RCTs) up to November 2025. Primary outcomes were 24 h postoperative and intraoperative opioid consumption. Secondary outcomes included pain scores, length of hospital stay (LoS), surgery duration, and adverse events. Standardized mean differences (SMD) and risk ratios (RR) were pooled. Results: Five RCTs involving 520 patients were included. No significant difference was found in 24 h postoperative opioid consumption (SMD: −1.62, 95% CI [−3.45, 0.20]; p = 0.08) or intraoperative opioid consumption (SMD: 0.38, 95% CI [−0.36, 1.12]; p = 0.31). QLB provided better, transient pain relief at rest at 12 h (SMD: −0.30, 95% CI [−0.52, −0.07]; p = 0.01) and during movement at 6 h (SMD: −0.20, 95% CI [−0.49, −0.09]; p = 0.01). No other time points for pain showed significant differences. QLB was associated with a shorter surgery duration (MD: −5.61 min, 95% CI [−10.38, −0.85]; p = 0.02), but not LoS (p = 0.53) or rates of PONV (p = 0.24) or dizziness (p = 0.32). Conclusions: With uncertain evidence, QLB and TAPB showed no significant difference in opioid consumption. QLB demonstrated a statistically significant but transient early analgesic advantage. This heterogeneity may be due to different QLB techniques, warranting further investigation.