Equis ISSN 2398-2977

Supraorbital nerve: perineural anesthesia

Contributor(s): Dennis E Brooks, Graham Munroe, John Parker

Introduction

  • Local anesthesia of cranial nerves supplying the periocular region of the horse are occasionally used one of the most frequent being the supraorbital (frontal) nerve block (part of the Ophthalmic Branch of Trigeminal V).
  • This leads to skin desensitization of the middle two-thirds of the upper eyelid and variable motor paralysis due to blocking of the palpebral branches of the facial nerve present at this site.

Uses

  • Desensitization of upper eyelid for minor eyelid surgery, eg biopsies , subpalpebral lavage systems   Eye: drug administration 02 - topical  .
  • May partially reduce upper eyelid blepharospasm facilitating examination of the eye .

Advantages

Disadvantages

  • Can be slightly difficult to undertake in uncooperative individuals.

Requirements

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Preparation

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Procedure

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Michou J & Leece E (2012) Sedation and analgesia in the standing horse 2. Local anaesthesia and analgesia techniques. In Pract 34 (10), 578-587 VetMedResource.
  • Kafarnik C (2011) Periocular nerve blocks in horses. UK Vet 16 (8), 9-12 VetMedResource.


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