Comparison Between Computed Tomographic Arthrography, Radiography, Ultrasonography, and Arthroscopy for the Diagnosis of Femorotibial Joint Disease in Western Performance Horses.

The research article compares the efficiency of four diagnostic methods—computed tomographic arthrography (CTA), radiography, ultrasonography, and arthroscopy—in detecting femorotibial joint disease in Western performance horses. The findings revealed that CTA was superior in identifying defects in the cruciate ligaments, proximal tibia, and ligament entheses, though it lacked reliability in detecting articular cartilage damage on the medial femoral condyle.

Research Objective and Methodology

• The study undertook to evaluate and compare the effectiveness of radiography, ultrasonography, computed tomographic arthrography (CTA), and arthroscopy in diagnosing conditions causing lameness in horses linked to the femorotibial joints.
• The prospective study included 25 stifles from 24 horses, all assessed using the four diagnostic techniques.
• Differences between the methods were determined using a McNemar’s test.

Findings

• Arthroscopy detected cranial medial meniscotibial desmopathy—a potential cause of the lameness—in 14 out of the 25 instances. Ultrasonography, by comparison, only detected it in 3 out of 11 arthroscopically observed cases. CTA picked it up in 9 out of 12 arthroscopically observed cases.
• Medial meniscal injury located on the craniolateral border was most commonly detected with arthroscopy and picked up by CTA in five instances, but ultrasonography detected it in none.
• Of a potential 25 cases of articular cartilage defects on the medial femoral condyle, arthroscopy detected them in 24 instances (96%). They were also found by CTA in 12 out of 20 cases (60%), representing significant disagreement between these two modalities (P = 0.02).
• Both cranial and caudal cruciate ligament defects were identified more often by CTA than by arthroscopy: 6 out of 22 cases and 7 out of 19 cases, versus 3 out of 25 cases and 2 out of 25 cases, respectively.

Conclusion

• The findings reveal CTA to be more capable than the other methods in detecting defects within the cruciate ligaments, the proximal tibia, and ligament entheses. However, it wasn’t reliable for detecting articular cartilage damage on the medial femoral condyle, a defect better detected by arthroscopy.
• The distinctions in efficiency among these diagnostic techniques can serve as valuable guidance for veterinary healthcare providers in choosing the more effective methods in specific scenarios.