The Eye

Retrobulbar vs peribulbar regional anesthesia techniques using bupivacaine in dogs

“…This is similar to data reported in dogs following RBA or PBA and in cats following PBA and successful RBA . Mydriasis occurs following RBA and PBA due to anesthesia of the oculomotor nerve, cranial nerve III, and is one of the benefits of using these regional anesthetic techniques for intraocular surgery . Surprisingly, HPD decreased for 2‐3 hours in the treated eye of two dogs in the present study (one from each treatment group).…”

Local and regional anaesthesia in dogs and cats: Descriptions of specific local and regional techniques (Part 2)

“…Retrobulbar block (Giuliano & Walsh, 2013;Accola et al, 2006;Myrna, Bentley, & Smith, 2010;Shilo-Benjamini, 2019) Box 10 Tissues/area desensitized: Structures of the eye including the conjunctiva, cornea and uvea. Used primarily for enucleation but could be considered for other ocular surgeries.…”

“…▪ Technique: The technique described here (the inferior-temporal palpebral retrobulbar block) is used by the author and was deemed the most effective and easiest of 5 different approaches to the retrobulbar block (Accola et al, 2006;Giuliano & Walsh, 2013).…”

“…• Potential injection site complications include penetration of the globe (described as unlikely by Giuliano & Walsh, 2013), intravascular injection (remember to aspirate! ), intraneural injection (do not inject if excess pressure), retrobulbar haemorrhage and proptosis, which is more likely with large volumes of anaesthetic used in brachycephalic breeds (Giuliano & Walsh, 2013).…”

“…• Potential injection site complications include penetration of the globe (described as unlikely by Giuliano & Walsh, 2013), intravascular injection (remember to aspirate! ), intraneural injection (do not inject if excess pressure), retrobulbar haemorrhage and proptosis, which is more likely with large volumes of anaesthetic used in brachycephalic breeds (Giuliano & Walsh, 2013). compared with use of systemic opioids alone (Buback, Boothe, Carroll, & Green, 1996), the author's clinical experience is that the block is at least partially effective for pain relief and should be in-…”