Equine laryngeal hemiplegia. Part III. Treatment by laryngoplasty

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Abstract
During the years 1971-1979, 127 horses with left laryngeal hemiplegia were studied. The physical characteristics and clinical signs observed in this study were recorded in Part I and Part II of ths series of papers. Of these 127 horses, 81 were treated by the laryngoplasty procedure. Complications of surgery are described and the effects of the operation on respiratory noise and performance are evaluated. In 54.8% of horses the chronic respiratory noise observed during exercise was apparently diminished or eliminated post-operatively. The performance of 44% of horses was apparently improved after surgery. Post-operative racing success occurred in 38% of horses treated. Satisfactory arytenoid adduction as assessed endoscopically within 9 days of surgery was achieved in 77% of cases. Surgical failure appeared to be related to cutting of the laryngeal cartilages by the prosthesis and techniques to minimise this are discussed.

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