Evaluation of clinical and tenoscopic findings in the carpal flexor sheath of horses
2017
Zetterstrom, Sandra M. | Johansson, Bengt C. | Carmalt, James L.
OBJECTIVE To evaluate clinical and tenoscopic findings in a large group of horses undergoing surgery of the carpal flexor sheath (CFS) and determine whether any of the presurgical clinical signs were associated with tenoscopic findings. ANIMALS 242 horses that had undergone diagnostic and therapeutic tenoscopy of the CFS because of aseptic tenosynovitis. PROCEDURES Medical and tenoscopic video records (when available) of 242 horses undergoing tenoscopy of the CFS at a single equine clinic between January 2005 and June 2014 were reviewed. Tenoscopic findings were categorized as present or absent, and tears in the deep digital flexor tendon (DDFT) were subjectively graded according to severity. Logistic regression analysis was used to examine whether presurgical clinical findings were associated with intraoperative tenoscopic findings. RESULTS 242 horses (411 limbs) were evaluated by use of tenoscopy. An exostosis was detected in 228 horses (379 limbs) and was often multipartite. Most exostoses were found medial to, or within, the sagittal plane at the caudal margin of the scar on the distal physis of the radius. Effusion in the CFS was associated with tears in the DDFT. Other presurgical clinical findings were not predictive of intrathecal findings. CONCLUSIONS AND CLINICAL RELEVANCE Synovial effusion was predictive of DDFT lesions within the CFS but was not predictive of the severity of lesions. Further studies will be necessary to determine whether any tenoscopic findings are associated with reduced athletic performance and to assess the effect of surgical intervention in affected horses.
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