Magnetic resonance imaging features of oblique and straight distal sesamoidean desmitis in 27 horses.

This research article delves into how magnetic resonance imaging (MRI) can effectively diagnose injuries in the oblique and straight distal sesamoidean ligaments in horses, with a major cause of lameness being attributed to injuries in these regions. The study highlights the effectiveness of a six-month rest and rehabilitation program, with 76% of the horses resuming successful performance.

Objective of the Study

• The main aim of this research was to observe and interpret the MRI findings related to oblique and straight distal sesamoidean ligament injuries, conditions that are increasingly being identified as common causes of lameness in horses.
• The study also sought to assess long-term prognosis for horses diagnosed with desmitis (inflammation) of these ligaments.

Research Methodology

• 27 horses diagnosed with desmitis were included in the study. All the horses experienced lameness localized to the digit or around the metacarpophalangeal/metatarsophalangeal joint region.
• The research team used a high-field 1 T magnet machine to conduct MRI on the horses who were in right lateral recumbency (positioned on their right side).
• The study also took into account the distribution of lameness: ten horses had forelimb lameness, while 17 had hind limb lameness.

Findings from Imaging

• After analyzing the MR images, abnormalities were discerned in the oblique distal sesamoidean ligaments in 18 horses and in the straight distal sesamoidean ligament in three horses.
• Additionally, both oblique and straight distal sesamoidean ligaments showed abnormalities in six horses.

Treatment

• The researchers followed a uniform treatment protocol for all horses: a 6-month rest and rehabilitation program.
• In 22 horses, the digital flexor tendon sheath was injected with a concoction of methylprednisolone acetate and hyaluronic acid to reduce inflammation in the injured ligaments before the rest and rehabilitation program commenced.
• Ligament splitting was performed on two horses, one each in the oblique and straight distal sesamoidean ligaments.

Efficacy of the Treatment

• The study observed that 76% of the horses managed to resume performance successfully post the treatment, implicating the effectiveness of the rest and rehabilitation program.

Conclusion

• The research concluded that MRI is a reliable and effective method for diagnosing injuries in the oblique and straight distal sesamoidean ligaments in horses.
• The rest and rehabilitation treatment plan proposed in the study was seen as beneficial for most horses, highlighting its potential worth in practical, real-world applications.