Ultrasonography assessment focuses on evaluating which structures in stay apparatus injuries?

• A. Suspensory ligaments and distal sesamoidean ligaments
• B. Cartilage only
• C. Nerves only
• D. Bone changes only

Answer: (A)

Ultrasonography in stay apparatus injuries mainly targets the soft-tissue support structures that keep the fetlock and pastern functioning. The most important of these are the suspensory ligament and the distal sesamoidean ligaments. These ligaments run around the fetlock area and are the entities most likely to be injured in stay apparatus problems. Using ultrasound, you can examine their fiber pattern, echogenicity, and thickness, and look for signs of disruption, tearing, or inflammatory change, as well as swelling in surrounding tissues. Cartilage or nerves are not the primary focus of this imaging modality in this context, and bone changes are better evaluated with radiographs or other imaging. So the structures best assessed by ultrasonography for stay apparatus injuries are the suspensory ligaments and distal sesamoidean ligaments.