Positive contrast magnetic resonance bursography for assessment of the navicular bursa and surrounding soft tissues.

This research article examines the use of magnetic resonance (MR) bursography in investigating and distinguishing certain elements in the foot of horses. Using contrast injections of varying volumes, the researchers managed to better distinguish structural features and anomalies in both healthy and unhealthy horse limbs.

Objective and Process

• The primary objective of this research was to assess how distension of the navicular bursa, a small fluid-filled sac in the heel of a horse, affects its appearance and the surrounding structures in MR imaging. This process aimed at determining the cause of palmar heel pain in horses.
• The researchers studied normal cadaver limbs and limbs from lame horses, where lameness had been localized to the foot. The navicular bursae in the normal limbs were injected with different quantities of a solution – 2 ml, 4 ml, or 6 ml.
• The lame horse’s feet were injected with 4 ml or 6 ml of the solution, and then a repeated MR study was conducted.

Findings

• According to the findings, a 2 ml solution was sufficient to distend the proximal recess of the normal navicular bursa, which is positioned above the collateral sesamoidean ligament. A larger dosage, 4 ml, was needed to separate this ligament from the deep digital flexor tendon (DDFT).
• The separation of the navicular bone from the DDFT and the distal sesamoidian impar ligament required a dose of 6 ml. Using these techniques, the researchers successfully determined the presence or absence of adhesions, or fibrous bands of scar tissue, in the bursae of the horse feet.

Implications

• This study concluded that MR bursography was essential in identifying adhesions in horses that could not be definitively identified through normal MRI. The results and techniques discussed could have significant implications in veterinary care for diagnosing and treating foot ailments in horses.
• These findings also suggest that MR bursography could be a useful and effective tool in diagnosing foot-related ailments in other animals or even humans.