Comparison of Ultrasound-Guided Versus Anatomical Landmark-Guided Thoracolumbar Retrolaminar Techniques in Canine Cadavers

Julia Pentsou, Séamus Hoey, Michail Vagias, Bethany Guy, Vilhelmiina Huuskonen

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The retrolaminar block was developed in humans as an easier and safer alternative to the thoracic paravertebral block. This study aims to describe an ultrasound-guided thoracolumbar retrolaminar injection in canine cadavers and compare the injectate distribution between a landmark-guided and an ultrasound-guided thoracolumbar retrolaminar technique using computed tomography. Ten canine cadavers were randomised to receive two injections each of 0.6 mL/kg of iodinated contrast at the level of the twelfth thoracic vertebra (T12): a landmark-guided retrolaminar injection was performed on one hemithorax (group B, n = 10) and an ultrasound-guided on the other hemithorax (group U, n = 10). Groups were compared using the Mann-Whitney U test. The median (range) spread of the contrast in the paravertebral space was 0 (0-3) and 1 (0-5) vertebrae in groups B and U, respectively (p = 0.038). The median (range) extent of the spread surrounding the interverbal foramina was 4 (0-5) in group B and 4 (3-5) in group U. The median (range) spread along the retrolaminar space cranial and caudal to T12 was 3 (0-6) retrolaminar segments in group B and 3 (3-4) in group U. The potential of the ultrasound-guided retrolaminar injection to provide analgesia for dogs suffering from thoracolumbar pain should be further investigated.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalAnimals
Volume13
Issue number19
Early online date28 Sept 2023
DOIs
Publication statusE-pub ahead of print - 28 Sept 2023

Keywords / Materials (for Non-textual outputs)

  • dogs
  • fascial plane block
  • retrolaminar block
  • paravertebral
  • thoracolumbar
  • analgesia
  • ultrasound-guided

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