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Case Report

Open Vet J. 2022; 12(6): 1035-1038

Ultrasound-guided brachial plexus block and suspected Horner’s syndrome in an alpaca (Vicugna pacos) undergoing traumatic scapulo-humeral luxation reduction and articular capsule reconstruction.

Francesco Santoro,Johanna Kaartinen .

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Background - Alpacas are becoming more and more diffused as pets in Europe and United Kingdom, and it is not uncommon to deal with these species in large animal referral hospitals. Unfortunately, pain assessment and treatment in llamoids remain challenging, due to their instinct of hiding signs of pain and the lack of relevant scientific literature.
Case description - This report describes the use of an ultrasound-guided brachial plexus block as part of a multimodal analgesic strategy in an alpaca undergoing surgical right shoulder luxation repair. Based on the intra-operative cardiovascular stability, the post-operative comfort level, and the minimal amount of systemic analgesics needed, it can be concluded that the block appeared effective and contributed to the peri-operative pain management.
After recovery from general anaesthesia, drooping of the right upper eyelid was observed and persisted for approximately 10 h. This finding could be interpreted as a Horner’s syndrome-like clinical sign and be a minor complication of the block, as previously described in other species.
Conclusion - Despite the minor complication here reported, and the difficulty in assessing intra- and post-operative nociception and pain in camelids, it can be concluded that the use of a brachial plexus block could be a valuable option when desensitisation of the forelimb is required.

Key words: alpaca, anaesthesia, analgesia, acute pain, regional anaesthesia.

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