A Modified Approach for the Ultrasound-Guided Quadratus Lumborum Block in Dogs: A Cadaveric Study

Overview

Journal Animals (Basel)

Date 2021 Oct 23

PMID 34679966

Citations 14

Authors

Jaime Viscasillas

Jose Terrado

Reyes Marti-Scharfhausen

Diego Castineiras

Vicente Esteve

Niamh Clancy

Jose Ignacio Redondo

Affiliations

Soon will be listed here.

Abstract

Ultrasound-guided quadratus lumborum block (QLB) is a locoregional technique described in canine cadavers. The aim of this study was to assess a modified approach to QLB to minimise potential complications such as abdominal organ puncture. Nine canine cadavers were included and were positioned in lateral recumbency. An ultrasound-guided QLB was performed on each side. The probe was placed in the transverse position over the lumbar muscles just caudal to the last rib, and a needle was advanced in-plane from a dorso-lateral to a ventro-medial. A volume of 0.2 mL kg of a mixture of iomeprol and methylene blue was injected. Computed tomography (CT) and dissection were performed to evaluate the spreading. Success was defined as staining of the nerve with a length of more than 0.6 cm. Potential complications such as intra-abdominal, epidural, or intravascular spreading of the mixture were also assessed. The CT images showed a T13 to L7 vertebra distribution, with a median of 5 (3-6). Dissection showed staining of the nerves from T13 to L4, with a median of 3 (2-5). No complications were found. This modified approach to QLB is safe and shows similar results to the previous studies in canine carcass.

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