RESUMO
Idiopathic thrombotic thrombocytopenic purpura (TTP) is frequently complicated by microinfarcts in cerebral cortex and subcortical white matter. We describe two sisters who suffered massive hemispheric infarction due to thrombosis of the middle cerebral artery main stem during exacerbations of TTP. Acute TTP may be associated with intraluminal thrombosis of large-diameter arteries in addition to arterioles and capillaries.
Assuntos
Embolia e Trombose Intracraniana/etiologia , Púrpura Trombocitopênica Trombótica/complicações , Adulto , Artérias Cerebrais , Córtex Cerebral/irrigação sanguínea , Córtex Cerebral/patologia , Saúde da Família , Evolução Fatal , Feminino , Humanos , Embolia e Trombose Intracraniana/diagnóstico , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Núcleo Familiar , Púrpura Trombocitopênica Trombótica/genéticaRESUMO
The use of air as the caloric medium was investigated and compared to that of water. The ability of air and water to generate surface temperatures close to the fluid outlet temperature was studied by irrigation onto a thermocouple. Results of caloric tests performed with air and water are compared by calculating the average nystagmus response for the hot and cold stimuli for two groups of sixty patients. Also, the number of canal paresis, directional preponderance, mixed, bi-lateral canal paresis and normal responses are compared for each group. Finally, the effect of performing a bi-thermal air caloric on a patient having a unilateral drum perforation is discussed.