Assessment of the ultrasonographic characteristics of the podotrochlear apparatus in clinically normal horses and horses with navicular syndrome.

This research article explores the use of ultrasound technology in identifying and measuring the podotrochlear apparatus in horses, particularly in distinguishing between healthy horses and those with navicular syndrome, a condition affecting the navicular bone and associated tendons and ligaments in the horse’s hoof.

Research Methodology

• The study is prospective and involves a total of 35 horses, which include 7 clinically normal horses and 28 horses diagnosed with navicular syndrome.
• To validate the use of ultrasound technology, 2 additional horses free of navicular syndrome were scanned and subsequently euthanatized to allow cross-verification of ultrasonographically identified structures with physical structures via necropsy.
• All the study horses were examined using ultrasonography, and both objective and subjective data were collected to identify changes associated with navicular syndrome.

Results of the Study

• The research revealed that the ultrasound method could be used to assess various components of the podotrochlear apparatus, which includes the navicular bone, impar ligament, distal digital annular ligament, deep digital flexor tendon (DDFT), and the navicular bursa.
• Although no significant differences were found between measurements of the podotrochlear apparatus in healthy horses and those with navicular syndrome, crucial subjective differences were observed through ultrasound in horses affected by the syndrome.
• Abnormalities detected in horses with navicular syndrome included navicular bursitis, dystrophic mineralization of the DDFT and impar ligament, tendonitis and insertional tenopathy of the DDFT, desmitis of the impar ligament, and alterations in the cortex of the navicular bone’s flexor surface.

Conclusion

• The researchers concluded that the use of ultrasonographic evaluation of the hoof is beneficial in identifying the cause of heel pain in horses’ hind legs and accurately distinguishing the components of navicular syndrome.
• The results of the study suggest that ultrasonography can provide substantial information on the structural changes in the podotrochlear apparatus related to navicular syndrome, thus aiding in the effective diagnosis and management of the condition.