Marco Aurélio Camargo Fontanela, Marina Moresco, Gilberto Serighelli-Júnior, Marcello Machado, Fabiano Montiani-Ferreira, Juan Carlos Duque Moreno
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引用次数: 0
Abstract
Objective: To compare dye spread after injection in the quadratus lumborum plane (QLP) via transmuscular and lateral approaches with different volumes in canine cadavers.
Study design: Cadaveric, experimental, prospective study.
Animals: A group of 58 canine cadavers.
Methods: Cadavers were classified by body mass as small (S, < 10 kg), medium (M, 10-20 kg) or large (L, > 20 kg). Morphometric data (mass, body condition score, axial length, abdominal and thoracic circumference) were recorded. Ultrasound-guided QLP injections with 0.15, 0.3 and 0.6 mL kg-1 of 0.1% methylene blue were performed via transmuscular or lateral approaches on both hemiabdomens. Craniocaudal and dorsoventral dye spread, the number of stained ventral branches of thoracolumbar spinal nerves (VBSNs) and whether the sympathetic trunk was stained were evaluated. Technique and dissection times, along with visibility scores for reference structures, needle and the injected solution within the QLP were recorded. Statistical analysis included two-way analysis of variance, Kruskal-Wallis, Pearson correlation and multiple regression tests, with significance set at p < 0.050.
Results: Morphometric variables influenced only the craniocaudal spread (p < 0.001). Craniocaudal spread did not differ significantly between approaches (p = 0.766) but was significantly influenced by volume (p < 0.002). However, greater craniocaudal spread did not result in an increased number of stained VBSNs (p = 0.488). The number of VBSNs stained was lower with 0.15 mL kg-1 (p < 0.013), with no differences observed between 0.3 and 0.6 mL kg-1 (p = 0.488). The most frequently stained VBSNs were L2, L3 and L1, in that order.
Conclusions and clinical relevance: There were no significant differences in dye spread between transmuscular and lateral approaches. Injectate volume affects spread, but volumes > 0.3 mL kg-1 do not increase the number of stained VBSNs. Morphometric variables do not affect the number of stained VBSNs.
期刊介绍:
Veterinary Anaesthesia and Analgesia is the official journal of the Association of Veterinary Anaesthetists, the American College of Veterinary Anesthesia and Analgesia and the European College of Veterinary Anaesthesia and Analgesia. Its purpose is the publication of original, peer reviewed articles covering all branches of anaesthesia and the relief of pain in animals. Articles concerned with the following subjects related to anaesthesia and analgesia are also welcome:
the basic sciences;
pathophysiology of disease as it relates to anaesthetic management
equipment
intensive care
chemical restraint of animals including laboratory animals, wildlife and exotic animals
welfare issues associated with pain and distress
education in veterinary anaesthesia and analgesia.
Review articles, special articles, and historical notes will also be published, along with editorials, case reports in the form of letters to the editor, and book reviews. There is also an active correspondence section.