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- Title
The analgesic efficacy of quadratus lumborum block in caesarean delivery: a meta-analysis and trial sequential analysis.
- Authors
Singh, Narinder P.; Makkar, Jeetinder K.; Borle, Anuradha; Monks, David; Goudra, Basavana Gouda; Zorrilla-Vaca, Andres; Singh, Preet Mohinder
- Abstract
Purpose: Quadratus lumborum block (QLB) has recently gained popularity for postoperative analgesia after cesarean delivery (CD) as it provides both visceral and somato-sensory blockade of the abdomen. Aim of this meta-analysis was to evaluate the analgesic potential of QLB after CD. Methods: Electronic database from inception to December 2019 was searched systematically for randomized-controlled trials comparing QLB with injection of inactive solution in women undergoing CD. Primary outcome was consumption of morphine at 24 h. Morphine consumption at 48 h, dynamic and static pain scores at various time intervals were the secondary outcomes studied. Results: Seven trials met the inclusion criteria. Morphine consumption was reduced significantly with QLB in comparison to sham or no block at 24 h (mean difference [MD] − 9.84 mg; 95% confidence interval [CI] − 18.16, − 0.50; p = 0.04; I2 = zero). Adequate "information size" for above outcome was confirmed with trial sequential analysis, ruling out any possibility of a false-positive result. QLB significantly reduced pain scores at rest (MD − 1.13; 95% CI − 1.75, − 0.56; p = 0.00) and on movement (MD − 1.48; 95% CI − 2.5, − 0.46; p = 0.01) at 6 h. However, statistically significant difference in pain scores persisted only for dynamic pain at 24 h (MD − 0.55; 95% CI − 1.04, − 0.06; p = 0.03). QLB does not provide any additional analgesic benefit to the parturient receiving intrathecal morphine. Conclusion: QLB significantly reduces opioid requirements in CD and may have analgesic effects lasting 24 h.
- Subjects
CESAREAN section; SEQUENTIAL analysis; SPINAL infusions; POSTOPERATIVE pain; MORPHINE; CONFIDENCE intervals
- Publication
Journal of Anesthesia, 2020, Vol 34, Issue 6, p814
- ISSN
0913-8668
- Publication type
Article
- DOI
10.1007/s00540-020-02822-7