Evaluation of the effectiveness of the Quadratus Lumborum Block type I using ropivacaine in postoperative analgesia after a cesarean section — a controlled clinical study
Abstract
Objectives: Quadratus Lumborum Block in contrast to Transversus Abdominis Plane Block contains a unique component which not only stops somatic pain but also inhibits visceral pain by spreading the local anesthetic to the paravertebral space. This study was designed to determine whether performing the Quadratus Lumborum Block type I in patients undergoing cesarean section would be associated with both decreased morphine consumption and decreased pain levels in the postoperative 48-hour period.
Material and methods: Sixty patients undergoing caesarean section under spinal anesthesia were randomly and equally assigned to one or other of two groups: QLB I (who received Bilateral Quadratus Lumborum Block type I with the use of 24 mL 0.375% ropivacaine per side) or a Control group. In both groups, on-demand morphine analgesia was administered postoperatively within the first 48 hours. The following were measured: the morphine consumption; the time elapsed from the C-section until the first dose of morphine; and the levels of pain intensity among patients in rest (numeral pain rating scale).
Results: There were no statistically significant demographic data differences between the QLB I and Control groups. The following significant differences were observed in the 48-hour postoperative period: morphine consumption was higher in the Control group (p = 0.000); the time elapsed from the C-section until the first dose of morphine was longer in QLB I group (p < 0.05); and the median of the pain numeric rating scale was higher in the Control group (p < 0.05).
Conclusions: Quadratus Lumborum Block type I significantly reduces morphine consumption and pain levels up to 48 hours postoperatively.
Keywords: quadratus lumborum block type Iropivacainecesarean sectionmultimodal analgesia
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