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Case History
6
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TUB
MAN
Tubman first came to us on
a dark winters evening in January 2008. He had been hunting that
afternoon and on his canter home had suddenly become extremely lame
on his left fore limb. He was immediately rushed to the Peasebrook
Equine Clinic for evaluation. On arrival Tubman was not able to
weight bear on his left fore limb and was very painful around his
pastern. His pastern joint and fetlock joint were also swollen.
X-rays were taken
straightway and revealed a fracture of his long pastern bone (P1).
The fracture extended from the articular surface of his fetlock
joint, right down to the articular surface of his pastern joint.

This
type of fracture is known as a saggital P1 fracture and can only be
corrected surgically. This was discussed with the owner and
scheduled for the following day. Overnight, Tubman was kept
comfortable with intravenous pain relief and with the application of
a large support bandage (known as a Robert-Jones bandage) and a
splint.
The following day, Tubman
was prepared for his surgery. He was starved of food prior to his
anaesthetic and began a course of prophylactic intravenous
antibiotics. He was given his premedication, which included potent
pain relief in the form of anti-inflammatories and morphine.
Tubman is a very large
hunter and therefore presented somewhat more of an anaesthetic risk
than a more average sized horse, particularly in conjunction with
the pastern fracture. His knock down went extremely smoothly
however in our purpose built, padded knock down box and no extra
strain was put on his fracture site. He was then carefully moved by
hoist to the theatre table.

As with all surgeries the
surgical site was made completely sterile prior to making an
incision. The surgery involved screwing the two fractured pieces of
bone back together by internal fixation using a ‘lag screw’
technique. Several cortical screws were used throughout the length
of the bone.

After making a stab
incision, a hole is made in the bone using a high-speed drill,
driven by high-pressure gas. A thread was then made in each hole
before each screw was placed. Several x-rays were taken throughout
surgery to ensure correct placement of each screw.

The two pieces of bone came
back together well and his anaesthetic was excellent. Although the
two fractured pieces of bone were fixed by screws, the limb was also
placed in a cast for extra support. Tubman was then hoisted into
our padded recovery box where he had a very smooth and quiet
recovery.
Tubman remained
hospitalised whilst he was in a cast and was monitored very
closely. Tubman was also cross-tied to prevent him from lying down,
as this would have put extra strain on the fracture site. Although
this may seem a little unfair, horses actually tolerate this
extremely well and it really helps to reduce the risk of the
fracture site re-fracturing, which would be a disaster. Tubman was
also kept on potent pain relief and prophylactic antibiotics.
A week later Tubman’s cast
was removed and he was placed once again into a Robert-Jones
bandage. His left fore fetlock and pastern joint were both
medicated two weeks postoperatively, to help to reduce the
inflammation in these joints. Tubman was then discharged and was
cross-tied at home. We changed his Robert-Jones bandage once a week
and he remained on potent pain relief.
Every week Tubman’s comfort
levels continued to improve. Repeat x-rays were taken 6 weeks
post-operatively and they showed that the fracture was healing
well. Tubman’s bandage was removed at this stage and after a
further week he was removed from his crossties.
Tubman then began a rehabilitation programme of hand walking and
turn out in a small paddock, prior to eventually being brought back
into work. Tubman has now made a complete recovery and is looking
forward to going hunting next season!
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