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18 year old Thoroughbred Broodmare
Referral case from DR. Tilley, DVM

Horse arrived on 2/4/2008
She had a laceration that had completely opened the front face of the left rear hock joint and severed (or
ruptured) the attachment of the Peronius Tertius ligament.
It was later determined that both the upper and lower tarsal joints were exposed and penetrated. The owners
were informed it would take a month to determine whether this mare can be returned to pasture soundness.
The original goal was to prevent contamination of the joints and grow a protective granulation bed over the
exposed ligaments around the hock.
Gentocin IV and Penicillin IM were administered once a day and the hock joint was cleaned with Wound Wash
and followed with injections of Platelet Rich Plasma into the joint.
Due to the heavy discharge from the injury, bandage changes were made every third day.
Day 9 – A discharge on the lateral side of the hock joint was back flushed and this demonstrated that the
discharge flow was connected to the lower hock joint.
Since this occurrence all efforts of treatment have been by back flushing while the upper hock joint was flushed
from the front.
Day 15 – Since the granulation bed has completely covered the opening of the hock joint we no longer consider
generalized infection of the hock joint a threat.
We continue to flush the joints every third day, and the joint does not indicate any purulent discharge.
The mare is still extremely sore and not putting the leg to the ground.
Instability of the lower leg indicates there is no re-attachment of the Peronius Tertius ligament.
Pain medication has been altered from Banamine to Phenolbutazone injections on a daily basis, for four days,
and then returned to Banamine.
Amikacin added to infusions of gel in the joint.
My evaluation at this stage is complete rupture of the Peronius Tertius ligament. Re-attachment will not occur.
Due to financial circumstances, and the fact that this mare has lost 250 pounds, we have not employed a farrier
to shoe this mare with a wedge shoe on the good leg to help prevent founder.
The owners were presented with this information in order for them to make an informed decision on this mare.

Treatment 2-4-2008 through 3-20-2008
2-4-08 Day 1
2-7-08 Day 4
3-8-08 Day 30
3-20-08 Day 42
Case 185
Hock Injury
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