Laryngeal Paralysis

Laryngeal paralysis affects primarily older, large breed dogs, especially Labrador retrievers. Affected dogs develop stridor and exercise intolerance, which is most severe during excitement or exercise.

The diagnosis is made by direct observation of immobile arytenoid cartilages under very light anesthesia. Conservative management includes weight reduction, exercise restriction, and use of a chest harness. We have found arytenoid lateralization (tie-back) to be the most effective surgical procedure. Non absorbable sutures are used to hold the arytenoid cartilage in the open position. Potential complications include aspiration, suture or cartilage breakage, and difficulty eating or swallowing. Severe complications are rare, and most dogs breathe much easier following the surgery.

While laryngeal paralysis secondary to neoplasia, trauma, and immune mediated conditions (especially myasthenia gravis) has been reported, the disease is usually idiopathic. Clients must understand that laryngeal paralysis is often just the first manifestation of a generalized, degenerative neuromuscular disorder, and other signs may follow in months or years.

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