Do nistagmo às provas calóricas com ar e com água

• Ano de defesa: 2011
• Autor(a) principal: Perrella de Barros, Anna Carolina Marques [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
• Palavras-chave em Português: Nistagmo fisiológico; Testes de função vestibular; Vestíbulo do labirinto; Testes calóricos; Nystagmus, physiologic; Vestibular function tests; Vestibule, labyrinth; Caloric tests
• Link de acesso: http://repositorio.unifesp.br/handle/11600/9341

Purpose: to compare the nystagmus response in air (50°C/24°C) and water (44°C/30°C) caloric tests. Method: controlled cross-sectional study in 40 healthy individuals without any symptoms or signs of either hearing or balance disorders who were not making use of any medications. The individuals underwent an otoneurological evaluation, including air (50°C/24°C) and water (44°C/30°C) caloric tests. Results: Comparing air and water caloric tests, no significant difference was found among the values of slow-phase velocity post-caloric nystagmus regarding the stimulation order, between ears and between the values of unilateral weakness and directional preponderance. Slow-phase velocity values were higher in water than in air stimulation (p=0.008, p<0.001). Cold stimulation evoked more intense responses than warm stimulation in both air and water tests (p<0.001). Conclusion: In air (50°C/24°C) and water (44°C/30°C) caloric tests, the post-caloric nystagmus is similar in terms of slow-phase velocity values in both ears, higher responses in the cold temperature, unilateral weakness and directional preponderance results but it is different with regard to slow-phase velocity values which are higher in water test.