Postoperative analgesic effectiveness of ultrasound-guided transmuscular quadratus lumborum block in congenital hip dislocation surgery : A randomized controlled study

Postoperative analgesic effects of the quadratus lumborum block in pediatric patients: a systematic review and meta-analysis

Background

This study assessed the postoperative analgesic efficacy and safety of the quadratus lumborum block (QLB) in pediatric patients.

Methods

Electronic databases were searched for studies comparing the QLB to conventional analgesic techniques in pediatric patients. The primary outcome was the need for rescue analgesia 12 and 24 hours after surgery. Secondary outcomes covered the Face-Legs-Activity-Cry-Consolability Scale (FLACC) scores at various time points; parental satisfaction; time to the first rescue analgesia; hospitalization time; block execution time; block failure rates, and adverse events.

Results

Sixteen randomized controlled trials were analyzed involving 1,061 patients. The QLB significantly reduced the need for rescue analgesia both at 12 and 24 hours after surgery (12 hours, relative risk [RR]: 0.45; 95% confidence interval [CI]: 0.01, 0.88; 24 hours, RR: 0.51; 95% CI: 0.31, 0.70). In case of 24 hours after surgery, type 1 QLB significantly reduced the need for rescue analgesia (RR: 0.56; 95% CI: 0.36, 0.76). The QLB also exhibited lower FLACC scores at 1 hour (standardized mean difference [SMD]: -0.87; 95% CI: -1.56, -0.18) and 6 hours (SMD: -1.27; 95% CI: -2.33, -0.21) following surgery when compared to non-QLB. Among QLBs, type 2 QLB significantly extended the time until the first rescue analgesia (SMD: 1.25; 95% CI: 0.84, 1.67). No significant differences were observed in terms of parental satisfaction, hospitalization time, block execution time, block failure, or adverse events between QLB and non-QLB groups.

Conclusions

The QLB provides non-inferior analgesic efficacy and safety to conventional methods in pediatric patients.

Analgesic Efficacy of Quadratus Lumborum Block in Patients Undergoing Nephrectomy: A Systematic Review and Meta-Analysis

Objective

To evaluate the analgesic efficacy of quadratus lumborum block (QLB) in adults undergoing nephrectomy.

Design

Systematic review and meta-analysis.

Patients

Adult patients (≥18 years of age) received nephrectomy under general anesthesia.

Methods

We searched PubMed, Embase, the Cochrane Library, and Web of Science on January 10, 2022, including randomized controlled trials that evaluated the analgesic efficacy of QLB for patients undergoing nephrectomy.

Results

A total of 12 randomized controlled trials (N = 821 patients) were included in the study. Compared with the non-block, single-shot QLB reduced postoperative opioid consumption (mean difference [MD], −8.37 mg intravenous morphine equivalent; 95% confidence interval [CI], −12.19 to −4.54 mg) and pain scores at 2 hours, 6 hours, 12 hours, and 24 hours at rest and during movement after nephrectomy. Single-shot QLB also prolonged the time to first analgesic request (MD, 6.44 hours; 95% CI, 2.23 to 10.65 hours), shortened the length of hospital stay (MD, −0.32 day; 95% CI, −0.55 to −0.09 day), and decreased the incidence of postoperative nausea and vomiting (risk ratio, 0.48; 95% CI, 0.36 to 0.65). Compared with continuous epidural anesthesia, repeated QLB could provide comparable postoperative analgesic benefits.

Conclusions

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 might need to determine which approach of QLB is superior for postoperative analgesia after nephrectomy.

The Analgesic Efficacy of Ultrasound-guided Quadratus Lumborum Block (via transmuscular or posterior approach) After Hip Surgery: A Systematic Review and Meta-analysis with Trial Sequential Analysis

BACKGROUND

No review or meta-analysis exists elucidate the efficacy and safety of quadratus lumborum block (QLB) on the pain intensity, opioid requirement, and mobilization in patients undergoing hip surgery. This systematic review and meta-analysis of randomized controlled trials was designed to compare QLB with no block or placebo (without other nerve/plexus blocks) for patients undergoing hip surgery.

METHODS

Two individual researchers conducted the platform searches on the PubMed, Cochrane Library, and Embase databases from inception to 12 June 2021. Only English publications were included. The rest pain score at 12 postoperative hours was designated as the primary outcome. Secondary outcomes included rest pain score at 6 and 24 postoperative hours, dynamic pain score at 6, 12, and 24 postoperative hours, total opioid consumption, postoperative nausea and vomiting, and patient satisfaction.

RESULTS

Seven trials including 514 patients were included. When compared with controls, the QLB technique significantly reduced rest pain scores at 12 hours after surgery (mean difference -1.15, -1.52 to -0.77, P<0.0001). The secondary outcomes were limited by heterogeneity: secondary pain outcomes and opioid consumption were consistently improved with QLB (P<0.05); patient satisfaction and postoperative nausea and vomiting were similar between the groups based on the Inverse variance heterogeneity model (P>0.05). The overall quality of evidence was moderate.

CONCLUSIONS

There is moderate evidence that QLB employment in hip surgery produces significant reduction in pain scores and opioid consumption within 24 hours. QLB appears to be an appropriate option for postoperative analgesia after hip surgery.

The Effect of Transmuscular Quadratus Lumborum Block on Postoperative Opioid Consumption in Patients Undergoing Percutaneous Nephrolithotomy: A Randomized Controlled Study

Background

This study aimed to investigate the effect of ultrasound-guided transmuscular quadratus lumborum block (QLB) on postoperative opioid consumption in patients undergoing percutaneous nephrolithotomy (PCNL).

Methodology

A total of 40 patients aged between 18 and 60 who were classified as American Society of Anesthesiologists status I-II and scheduled for unilateral PCNL were randomly divided into two groups. Patients in Group QLB (n = 20) received a single-shot QLB with 20 mL of 0.25% bupivacaine in the preoperative period. No intervention was performed in the control group (Group C, n = 20). Dermatomes affected by the block procedure were evaluated in the preoperative period in the group of patients who were administered the block procedure. General anesthesia was administered to all patients in both groups. In the postoperative period, opioid consumption, pain scores, side effects related to opioid consumption, and additional analgesic requirements were recorded.

Results

Opioid consumption was significantly lower in Group QLB compared to Group C at all times (p < 0.05). Postoperative visual analog scale (VAS) scores during the movement were significantly lower in Group QLB compared to Group C at all times (p < 0.05). VAS scores at rest were reported to be significantly lower in Group QLB compared to Group C, except for the eighth and twelfth hours (p < 0.05). The requirement for additional analgesic agents was significantly lower in Group QLB compared to Group C (p < 0.05).

Conclusions

QLB reduced postoperative opioid consumption and VAS scores by providing more effective analgesia compared to the control group in patients who underwent PCNL.