Ultrasonographic diagnosis of femoral fractures in large animals.

The research article studies the use of ultrasonography for diagnosing femoral fractures in large animals, considering it as a potentially superior alternative to radiography. 12 large animals with diagnosed femoral fractures were studied, and results showed that ultrasonography was not only able to identify the fractures but also visualise their movements, aiding in quicker decisions related to treatment or euthanasia.

Introduction and Study Details

• The study is a retrospective analysis of cases from 2000 to 2019 where large animals like horses, cattle, and an elephant were diagnosed with femoral fracture using femoropelvic ultrasonography.
• The animals ranged in age from less than a year to 33 years old, with a median age of 13 years.
• The animals included in the study had experienced severe acute lameness due to various reasons including falling, limb entrapment, dystocia, vehicular collision, full limb casting, or unknown events.

Observations and Findings

• All patients were unable to bear weight on the affected limb or were limping while walking, with two cases of recumbent (laying down) cattle.
• Most of them showed upper limb swelling and some experienced nonspecific upper limb crepitus (a cracking or popping sound).
• Application of ultrasonography revealed evidence of different types of femoral fractures – diaphyseal (relating to the main part of the bone), greater trochanteric (upper part of thigh bone), capital physeal (growth plate), and distal femoral (lower part of thigh bone).
• In five animals, any movements of the fractures could be visualized using ultrasonography during limb manipulation or weight shifting.

Comparison with Radiography and Outcomes

• Radiography, which traditionally serves as a diagnostic tool for fractures, managed to confirm fractures in only 3 out of 8 animals it was used on.
• On the other hand, ultrasonography findings were confirmed in postmortem examinations in 10 out of 10 animals.
• Ultimately, due to the severity of the fractures, all animals were euthanized or, in the case of one bovine, slaughtered.

Conclusion

• Femoral fractures were neither localized nor confirmed using any other diagnostic method before ultrasonography in any of the cases. This indicates that there were limitations in other standard diagnostic options for large animals.
• The findings of the study strongly support the adoption of ultrasonography for an immediate, accurate diagnosis of femoral fractures in large animals, aiding in decisions about their prognosis and treatment.