Management of rupture of the gastrocnemius and superficial digital flexor muscles with a modified Thomas splint-cast combination in a horse.

The study reports successful treatment of significant leg muscle injury in a young horse using a custom-fit, modified Thomas splint-cast combination. The treatment effectively led to muscle healing and functional recovery, although a related joint condition developed within weeks after the injury.

Introduction

• The research foregrounds a case of a 6-month-old warmblood filly (a young female horse), who suffered a traumatic rupture in two important muscles of the left hind limb: the gastrocnemius and superficial digital flexor muscles.

Methodology

• A special treatment approach was implemented to handle this situation. This involved the use of a modified Thomas splint-cast combination that was custom fitted to the horse’s limb. The purpose of this external coaptation device was to prevent further disruption of the caudal reciprocal apparatus – a system of muscles and tendons that allow the horse’s leg to move and function properly.
• The device was kept in place for 21 days, after which it was removed.

Results and Observations

• Eight weeks post the initial injury, the horse developed lesions consistent with osteochondrosis of the femoropatellar articulation. This is a disorder that affects joint cartilage and subchondral bone, often inhibiting the horse’s ability to move without pain.
• However, upon examination six months after the initial injury, the researchers discovered fibrous healing of the ruptured muscles, indicating that the applied treatment was successful.
• Additionally, the function of the caudal reciprocal apparatus was restored, suggesting a positive outcome of the methodology in terms of joint functionality.
• The external appearance of both hind limbs had also normalized, with no obvious differences being noticed.

Summary

• This research provides significant insight into treating muscle traumas in horses using a modified Thomas splint-cast combination. Despite the development of osteochondrosis post-treatment, the overall recovery indicates a successful healing intervention that can enhance the restoration of muscular and joint function.