Research Note: Platelet Function in Cats with Hyperthyroidism

In humans, the risk for thromboembolism increases in hyperthyroid patients. Although it is known that cats with hyperthyroidism are prone to thromboembolism, the mechanism is unclear. This study compared platelet function in hyperthyroid cats with that in euthyroid age-matched cats. The study authors hypothesized that hyperthyroid cats would have platelet function abnormalities; however, this study did not find platelet function in these cats to be affected. In humans with hyperthyroidism, increases are seen in von Willebrand factor; this may be a source for further studies in feline patients.