Evaluation of clinical examination for differential diagnosis of lameness by navicular apparatus or heel pain in horses.

The research study aims to evaluate how clinical examinations can be used to discern between lameness arising from navicular region pain and other forms of palmar heel pain in horses.

Methodology and Participants

• 34 horses experiencing forelimb lameness, which seemed to stem from the palmar aspect of the hoof, made up the subjects for this study.
• The horses were further divided into two groups based on their reaction to analgesia administered to two specific areas: the distal interphalangeal joint and navicular bursa.
• If a horse exhibited strong improvement following the administration of both analgesic blocks, it was deemed to be suffering from navicular region pain.
• Horses that did not show considerable improvement were considered to be experiencing palmar heel pain from some other cause.

Diagnostic Tests

• Three different diagnostic tests were utilized: the hoof tester, distal limb flexion, and toe wedge.
• The reactions of the horses to these tests were assessed and compared between the two groups.

Results

• Sensitivity, specificity, and positive predictive values for the detection of navicular pain were calculated for all diagnostic tests.
• The research found that the most accurate diagnostic test was the administration of analgesia to the distal interphalangeal joint. This implies that horses with navicular region pain will typically show significant improvement following the introduction of anaesthesia to this region.

Conclusion

• This study has contributed to the understanding of how clinical tests can help differentiate between navicular pain and other forms of heel pain in horses.
• The findings propose that the use of analgesia in specific tests could serve as an important diagnostic tool in discerning the cause of equine lameness.