Page 149 - BSAVA Guide to Pain Management in Small Animal Practice

BSAVA Guide to Pain Management in Small Animal Practice

VetBooks.ir anaesthetic is in ected subcon unctivally
around the globe to provide regional
anaesthesia to the extraocular muscles. he
in ection site is mm from the limbus and
.1 . ml kg bupivacaine is administered
using a . cm needle igure 7.14 .
A curved retrobulbar needle suitable for use Subtenon nerve block
in the dog.
his techni ue provides anaesthesia,
analgesia and akinesia for corneal and
then redirected dorsomedially to reach the intraocular procedures Ahn et al., 1 . It is
caudal aspect of the globe igure 7.1 . not used by the author for enucleation as
ollowing aspiration, 1 to 4 ml of local it does not provide e ective eyelid
anaesthetic solution is in ected, depending on anaesthesia. ollowing induction of
patient si e. Although used in the cat, some anaesthesia the patient is positioned in
controversy exists over whether this techni ue dorsal recumbency, topical local anaesthesia
is appropriate in this species; care should be applied to the cornea and eyelid retractors
taken as brainstem anaesthesia has been placed. An incision is made mm from the
reported in the cat following its use liver and limbus in the dorsomedial aspect of the bulbar
Bradbrook, 1 . con unctiva. he con unctiva and tenon
capsule are bluntly dissected from the
Peribulbar nerve block (PBA) underlying sclera. A curved spatulated
his techni ue has been shown by Shilo cannula is directed dorsocaudally and
Benhamini et al. 14 to be superior to RBA in 1 ml of lidocaine solution is in ected
the cat and is used by the author. Local following aspiration igure 7.1 .

A cross sectional
3 diagram of the
orbit, globe and associated
structures 1 globe;
eyelids; needle
placement for a retrobulbar
in ection; 4 intraconal space;
orbit; 6 extraocular
muscles, nerves and blood
vessels; 7 in ection site for
1 peribulbar block.
6

4
3
2

5 7

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