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OJVRTM
Online Journal of Veterinary Research©
Volume 12
(1) :14-20, 2008
Palmar
digital nerve block and bursal analgesia
in lame horses due to exostosis
of third phalanx
Kamran Sardari
DVM, PhD
Department of Clinical
Sciences,
ABSTRACT
Kamran Sardari, Palmar
digital nerve block and bursal analgesia
in lame
horses due to exostosis of third phalanx,
Online
J Vet
Res 12 (1)
:7-13, 2008. It
has been hypothesised that pain originating from the distal interphalangeal
joint (DIP) in horses can be attenuated by analgesia of the distal interphalangeal (DIP) joint or navicular
bursa (NB) and palmar digital (PD) nerve
block. To
test this hypothesis, 6 adult horses with lameless
due
to exostosis at the extensor process of
the third phalanx
were selected. Both synovial structures
and PD nerve
were blocked and the effects on the lameness were quantitatively
scored.
Lameness score was high at the trot before injection of lidocain
HCl around the PD nerves and DIP joint, and
significantly reduced 5 minutes after administration of drug around the
PD
nerves (P<0.05), and into the DIP joint (P<0.0001). At the walk
the
difference was even greater and became 0 after DIP joint analgesia.
Lameness
score was also high at the trot and walk before injection into the navicular bursa and no significant differences
was seen 5
minutes after navicular bursa analgesia in
both trot
and walk (P>0.05). Fifteen minutes after navicular
bursa analgesia, significant reduction of the lameness at the trot and
walk was
seen (P<0.05). It is concluded that, pain arising from the third
phalanx such
as extensor process exostosis should not
be
eliminated as a possible cause of lameness when lameness is
significantly
reduced by diagnostic analgesia of any of related structures.
Keywords: Horse, navicular bursa,
distal interphalangeal joint, lameness,
third phalanx
extensor process
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