Abstract
Objective
To compare the dye distribution following either two lateral abdominal or one lateral
abdominal and one subcostal ultrasound-guided transversus abdominis plane (TAP) injections
of a clinically relevant volume of dye solution in dogs.
Study design
Randomized cadaveric study.
Animals
A total of eight canine cadavers.
Methods
On one side of each cadaver, two TAP injections were performed on the lateral aspect
of the abdomen (approach LL), caudal to the last rib and cranial to the iliac crest.
On the contralateral hemiabdomen, one subcostal (caudal to the costal arch) and one
lateral abdominal injection (between last rib and iliac crest), were performed (approach
SL). Side allocation was randomly determined. A spinal needle was introduced in-plane
to the transducer for each injection of methylene blue (0.25 mL kg−1). All cadavers were dissected to assess dye distribution and number of stained target
nerves.
Results
All injections were performed in the TAP. The proportion of target nerve staining
was 53.5% versus 80.4% with approaches LL and SL, respectively (p = 0.005). Approach LL stained the first lumbar (L1) spinal nerve in 100% of injections
and ninth thoracic (T9), T10, T11, T12, T13 and L2 were stained in 0%, 0%, 37.5%,
62.5%, 87.5% and 87.5% of injections, respectively. Approach SL stained T11, L1 and
L2 in 100% of injections and T9, T10, T12 and T13 were stained in 37.5%, 87.5%, 75%
and 62.5% of injections, respectively. Approach SL resulted in greater staining of
nerves cranial to T12 compared with approach LL. The two approaches were equivalent
in staining nerves caudal to T12.
Conclusions and clinical relevance
Approach SL provided a broader distribution of the injected solution than approach
LL, which may result in a larger blocked area in live animals undergoing celiotomy.
Keywords
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References
- Cutaneous innervation of the thorax and abdomen of the dog.Am J Vet Res. 1984; 45: 1689-1698
- Ultrasound-guided bilateral dual transversus abdominis plane block: a new four-point approach.Acta Anaesthesiol Scand. 2011; 55: 658-663
- Anatomical evaluation of the thoracolumbar nerves related to the transversus abdominis plane block technique in the dog.Anat Histol Embryol. 2017; 46: 373-377
- Effect of contrast and local anesthetic on dye spread following transversus abdominis plane injection in dog cadavers.Vet Anaesth Analg. 2020; 47: 391-395
- Ultrasound-guided subcostal oblique transversus abdominis plane block in canine cadavers.Vet Anaesth Analg. 2017; 44: 183-186
- Spinal nerves.in: Evans H.E. de Lahunta A. Miller’s Anatomy of the Dog. 4th edn. Saunders Elsevier, USA2013: 611-657
- Two-point ultrasound-guided transversus abdominis plane injection in canine cadavers — a pilot study.Vet Anaesth Analg. 2018; 45: 871-875
- Acute cardiovascular toxicity of intravenous amide local anesthetics in anesthetized ventilated dogs.Anesth Analg. 1982; 61: 317-322
- Mechanism of action of the erector spinae plane block: distribution of dye in a porcine model.Reg Anesth Pain Med. 2020; 45: 198-203
- Retrospective clinical evaluation of ultrasound guided transverse abdominis plane block in dogs undergoing mastectomy.Vet Anaesth Analg. 2014; 41: 319-324
- Systematic review of the systemic concentrations of local anaesthetic after transversus abdominis plane block and rectus sheath block.Br J Anaesth. 2017; 118: 517-526
- Perioperative analgesic effects of an ultrasound-guided transversus abdominis plane block with a mixture of bupivacaine and lidocaine in cats undergoing ovariectomy.Vet Anaesth Analg. 2018; 45: 374-383
- Ultrasound-guided transversus abdominis plane block in the dog: an anatomical evaluation.Vet Anaesth Analg. 2011; 38: 267-271
- Comparison of the spread of two different volumes of contrast medium when performing ultrasound-guided transversus abdominis plane injection in dog cadavers.J Small Anim Pract. 2017; 58: 269-275
Article info
Publication history
Published online: October 09, 2020
Accepted:
September 26,
2020
Received:
March 6,
2020
Identification
Copyright
© 2020 Association of Veterinary Anaesthetists and American College of Veterinary Anesthesia and Analgesia. Published by Elsevier Ltd. All rights reserved.