Computed tomographic anatomy of the equine stifle joint.

The research conducted focuses on creating a comprehensive Computed Tomography (CT) representation of the anatomy of a healthy horse stifle joint, using 16 hind limbs from eight equine cadavers as samples. The findings will be helpful when other imaging methods fail to provide precise results, allowing better diagnostics in veterinary medicine.

Methodology

• Eight hind limbs from equine cadavers were subjected to CT scanning, ensuring that none of these horses had any signs of orthopedic disease affecting their stifle joints.
• The CT scanning was done both before and after injecting a contrast material into the medial and lateral compartments of the femorotibial joint and femoropatellar joint. This process is called CT arthrography.
• The CT images acquired were then restructured in different planes – transverse, parasagittal, and dorsal – and were paired with corresponding anatomical sections from the remaining eight limbs.

Results

• The CT images clearly depicted the femur, tibia, and patella. Other structures like patellar ligaments, some muscles’ tendinous parts, collateral ligaments, and the cruciate ligaments were also consistently visible.
• The arthrogram sequences allowed for a complete assessment of the cruciate ligaments and the meniscotibial ligaments.
• However, it was difficult to delineate the margins of the meniscofemoral ligament and the lateral and medial femoropatellar ligaments on both precontrast and postcontrast images.

Conclusions

• The research successfully utilized CT and CT arthrography to identify and characterize the bony and soft tissue structures of a horse’s stifle joint.
• The results may prove beneficial when results from other imaging methods fail to yield conclusive outcomes, thus enhancing the diagnostic capabilities in equine orthopedic cases.
• Finally, the images and findings from this research would serve as a useful CT reference for the anatomy of the equine stifle joint in future studies and diagnostics.