1. Comparative study between lateral versus latero-ventral quadratus lumborum block for perioperative analgesia in canine laparoscopic ovariectomy.
- Author
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Degani M, Paolini A, Bianchi A, Tamburro R, Di Matteo L, Sandersen C, and Briganti A
- Subjects
- Animals, Dogs surgery, Female, Ropivacaine administration & dosage, Analgesia veterinary, Analgesia methods, Anesthetics, Local administration & dosage, Anesthetics, Local pharmacology, Abdominal Muscles innervation, Ovariectomy veterinary, Nerve Block veterinary, Nerve Block methods, Pain, Postoperative veterinary, Pain, Postoperative prevention & control, Laparoscopy veterinary
- Abstract
Objective: To compare the perioperative analgesic effect of lateral versus latero-ventral quadratus lumborum block (QLB) in dogs undergoing laparoscopic ovariectomy., Study Design: Randomized, blinded clinical study., Animals: A total of 15 client-owned female dogs undergoing laparoscopic ovariectomy., Methods: Animals were randomly assigned to receive a bilateral QLB, performed with 0.3 mL kg
-1 ropivacaine 0.5%, either with lateral (group LQLB , n = 7) or latero-ventral approach (group LVQLB , n = 7). Dogs were premedicated intramuscularly with methadone 0.2 mg kg-1 and dexmedetomidine 3 μg kg-1 . General anaesthesia was induced intravenously (IV) with propofol and maintained with isoflurane. Cardiovascular and respiratory variables were continuously monitored and recorded every 5 minutes during surgery. Fentanyl 3 μg kg-1 was administered IV if there was a 20% increase in heart rate and/or mean arterial pressure from previous values recorded 5 minutes before. Meloxicam 0.2 mg kg-1 was administered IV to all dogs during recovery. The short-form of the Glasgow Composite Pain Scale was used hourly for 8 hours post-QLB. Methadone 0.2 mg kg-1 was administered IV when pain score was ≥ 6/24. A chi-square test compared the number of dogs requiring intraoperative rescue fentanyl. A Friedman test with a Dunn's post hoc was used to evaluate the trend in postoperative pain scores within each group, and a Mann-Whitney U test compared scores between the groups at each time point; p < 0.05., Results: Significantly fewer dogs required intraoperative rescue fentanyl in group LQLB than in group LVQLB . No dog required postoperative rescue methadone, and there were no significant differences in pain scores., Conclusions and Clinical Relevance: Bilateral QLB performed with lateral approach reduced the number of dogs requiring intraoperative rescue analgesia in comparison with the latero-ventral approach. No differences were detected postoperatively, possibly owing to the confounding effects of methadone, dexmedetomidine and meloxicam., (Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)- Published
- 2024
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