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Transient Horner's syndrome in horses following cervical plexus local anesthesia
Duncan J Pearce1, Jennifer Raffetto1, Stuart A Vallance2
1Equine Centre, University of Melbourne Faculty of Sciences, Werribee, Victoria, Australia.
Objective:
To report the development of transient Horner's syndrome in horses following local anesthesia of the cervical plexus.
Animals:
A total of 37 horses.
Study Design:
Observational retrospective short case series.
Methods:
Medical records of cases undergoing ultrasound-guided cervical plexus anesthesia for standing prosthetic laryngoplasty at a single referral institution were evaluated (2019-2020).
Results:
Five of 37 horses (14%) developed transient signs of Horner's syndrome postoperatively. Obvious clinical signs began 2 to 5 h following local anesthesia and persisted for two to 4 h. Profuse unilateral sweating of the head and upper neck was the most apparent clinical sign.
Conclusion:
Transient clinical signs of Horner's syndrome were seen following unilateral local anesthesia of the cervical plexus. Long-term adverse sequelae were not observed.
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