Ultrasound-guided lateral and subcostal transversus abdominis plane block in calves: a cadaveric study.

Mirra, Alessandro; von Rotz, Alois; Schmidhalter, Marta; Moser, Lara Ivana; Casoni, Daniela; Spadavecchia, Claudia (2018). Ultrasound-guided lateral and subcostal transversus abdominis plane block in calves: a cadaveric study. Veterinary anaesthesia and analgesia, 45(3), pp. 384-391. Blackwell Science 10.1016/j.vaa.2018.02.001

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OBJECTIVE: To describe and assess the ultrasound-guided transversus abdominis plane (TAP) block feasibility in calf cadavers, to compare two injection volumes and to evaluate possible undesired solution spreads. STUDY DESIGN: Prospective, descriptive, anatomic study. ANIMALS: A group of 15 bovine cadavers weighing 47±11 kg (mean±standard deviation). METHODS: Lateral (n = 24) and subcostal (n = 12) TAP block approaches were assessed. For each approach, two volumes (0.2 or 0.4 mL kg-1) of toluidine blue and contrast medium were injected using both sides of the animals. Nerve staining was assessed by anatomical dissection and spread of injectate by contrast-enhanced computed tomography. Objective and subjective technique feasibility was evaluated by a specific score (poor, good, excellent). RESULTS: Using the lateral approach, 58%, 92% and 25% and 75%, 83% and 25% of the thirteenth thoracic, first and second lumbar nerves were stained by 0.2 and 0.4 mL kg-1, respectively. Craniocaudal and dorsoventral solution spread and number of blocks that adequately stained an individual nerve were not significantly different between the volumes. Using the subcostal approach, 67%, 83%, 67%, 67% and 50%, and 83%, 100%, 83%, 83% and 50% of the eighth, ninth, tenth, eleventh, twelfth thoracic nerves were stained by 0.2 and 0.4 mL kg-1, respectively. With both techniques, no intraspinal and one intraperitoneal spread were observed. Objective and subjective feasibility score was excellent for both approaches in the majority of the cases. CONCLUSIONS AND CLINICAL RELEVANCE: TAP injections were easy to perform with both techniques in calf cadavers. The volume of injectate did not influence spread. The authors conclude that a combination of the two approaches is necessary, but perhaps not sufficient, to stain all of the nerves innervating the ventral abdominal wall. Further studies are required to refine the technique and evaluate its efficacy in preventing nociception in calves.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > DKV - Anaesthesiology
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR)
05 Veterinary Medicine > Research Foci > NeuroCenter
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Clinic for Ruminants
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > DKV - Clinical Radiology
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Anatomy
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

UniBE Contributor:

Mirra, Alessandro; von Rotz, Alois; Schmidhalter, Marta; Moser, Lara Ivana; Casoni, Daniela and Spadavecchia, Claudia

Subjects:

600 Technology > 610 Medicine & health
600 Technology > 630 Agriculture

ISSN:

1467-2987

Publisher:

Blackwell Science

Language:

English

Submitter:

Vanessa Alice Blum

Date Deposited:

21 Nov 2018 15:02

Last Modified:

24 Oct 2019 07:19

Publisher DOI:

10.1016/j.vaa.2018.02.001

PubMed ID:

29625919

Uncontrolled Keywords:

TAP block calves local anaesthesia nerve staining ultrasound

BORIS DOI:

10.7892/boris.121347

URI:

https://boris.unibe.ch/id/eprint/121347

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