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Teste do gelo no diagnóstico de miastenia gravis Ice pack test in the diagnosis of myasthenia gravis

By Nilson Lopes da Fonseca Junior, Lucia Miriam Dumont Lucci and José Ricardo Carvalho Lima Rehder

Abstract

OBJETIVO: Demonstrar a sensibilidade e especificidade do teste do gelo no diagnóstico diferencial de ptose palpebral por miastenia gravis. MÉTODOS: Estudo prospectivo tipo ensaio clínico com grupo controle. Foi realizado o teste do gelo em pacientes portadores de ptose palpebral. Os pacientes foram divididos em 2 grupos, sendo o grupo I constituído por pacientes com miastenia gravis e o grupo II (controle) formado por pacientes portadores de ptose congênita, miogênica não-miastênica ou aponeurótica. RESULTADOS: Todos os pacientes do grupo I tiveram aumento da fenda palpebral de, no mínimo, 3 mm após a aplicação do gelo. Nenhum paciente do grupo II apresentou incremento da fenda palpebral após o teste. CONCLUSÃO: O teste do gelo mostrou-se específico para detecção de ptose palpebral de causa miastênica.<br>PURPOSE: To demonstrate the sensitivity and the specificity of the ice test in the differential diagnosis of ptosis in myasthenia gravis. METHODS: Prospective trial with a control group. The patients were instructed to hold a frozen ice pack on the closed ptotic eyelid. They were divided into 2 groups, with group I consisting of patients with myasthenia gravis and group II (control) consisting of patients with congenital, non-myasthenic myogenic or aponeurotic ptosis. RESULTS: All patients in group I had increased palpebral fissure for at least 3 mm after the application of ice pack. No patient in group II showed increased palpebral fissure after the ice test. CONCLUSION: Ice test proved to be specific for the detection of myasthenic ptosis

Topics: Miastenia gravis, Temperatura baixa, Blefaroptose, Sensibilidade e especificidade, Myasthenia gravis, Cold temperature, Blepharoptosis, Sensivity and specificity, Ophthalmology, RE1-994, Medicine, R, DOAJ:Ophthalmology, DOAJ:Medicine (General), DOAJ:Health Sciences
Publisher: Conselho Brasileiro de Oftalmologia
Year: 2010
DOI identifier: 10.1590/S0004-27492010000200012
OAI identifier: oai:doaj.org/article:8b6885701eb44ca297d02fa1d50043e5
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