Periocular nerve blocks in horses

Authors

  • Christiane Kafarnik Dr Med Vet MRCVS

    MSD Animal Health, Ophthalmology Resident
    1. ANIMAL HEALTH TRUST, LANWADES PARK, KENTFORD, NEWMARKET, SUFFOLK. CB8 7UU
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ABSTRACT:

Periocular nerve blocks allow safe, precise ophthalmic examination and enable surgical procedures, such as placing a subpalpebral lavage system, or minor corneal and conjunctival surgeries under additional deep sedation. Licensed local anaesthetic are mepivacaine hydrochloride 2% (Intra-epicaine®) and lidocaine hydrochloride which contains adrenaline (Locaine 2%®, Lignol 2%®); 1 – 2 millilitre of this local anaesthetic using a 25 gauge 5/8 needle is usually sufficient. The auriculopalpebral nerve block is a motor nerve block, and will not permit corneal or conjunctival desensitisation. The infratrochlear, supraorbital, lacrimal and zygomatic nerve block will desensitise the periocular skin.

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