Abstract

SummaryA 13‐year‐old Irish Draught cross gelding was referred for abnormal respiratory noise at low level exercise. Bilateral laryngeal paralysis was observed during the resting endoscopic examination. Blood samples revealed lead toxicosis and subsequent soil analysis confirmed high lead levels. Treatment with the lead chelating agent calcium disodium ethylenediamine tetraacetic acid was successful in rapidly reducing blood lead levels; however, complications were observed during this treatment. Despite bilateral laryngeal paralysis, the horse maintained a good quality of life and following placement of a tracheostomy tube was able to continue ridden exercise. Two years after treatment right sided laryngeal function appeared normal; however, agrade 5(of 5) left laryngeal hemiplegia was still present. Prolonged time periods are required for improvements in peripheral neuropathy subsequent to lead toxicosis to occur.

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