46TH
ANNUAL
CONGRESS
OF
THE
SAEVA
SKUKUZA
16-‐20
FEBRUARY
2014
97
Procedure:
The patient should be adequately restrained in stocks to prevent excessive
movement or shifting. The site for injection should be surgically prepared and local
deposition of 2% lidocaine subcutaneously will improve patient compliance.
The caudolateral border of the bony orbit and dorsal margin of the zygomatic arch
should be palpated. The needle should be inserted caudal to the bony orbit and
advanced craniocaudal on the dorsal margin of the zygomatic arch to just proximal
to the ear. The syringe is aspirated and slowly withdrawn while continuously
depositing local anaesthetic.
Complications:
Neuropraxia to the auriculopalpebral nerve can cause ptosis of the eyelids.
Figure. 1. Dissection of cranial regions of left side of the head of a fresh horse cadaver (MC
Carthy1996. Anat. Histol. Embryol. 25, 7-10).
Retrobulbar Nerve Block:
Indications:
The retrobulbar nerve block anaesthetizes all structures present in the periorbita.
This will provide unilateral akinesia, analgesia and blindness. The technique is
indicated for procedures performed on the conjunctiva and cornea.
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