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Comparison of Responses to Air, Water, and Closed-Loop Caloric Irrigators

1992; American Speech–Language–Hearing Association; Volume: 35; Issue: 1 Linguagem: Inglês

10.1044/jshr.3501.186

1558-9102

Elizabeth A. Karlsen, Hany H. Mikhail, Charley W. Norris, Ruth S. Hassanein,

Visual perception and processing mechanisms

Three types of commercially available caloric irrigation units—air, water, and closed-loop—were evaluated for nystagmus response patterns and comfort. Electronystagmographic recordings were analyzed for slow-phase velocity, response duration, amplitude, frequency, and test-retest reliability. Significant differences were found among the three types of irrigators, between warm and cool irrigators, and between male and female subjects. Test-retest reliability was adequate for all three units. Subjects clearly favored the closed-loop system over the water and air irrigators, but the water irrigator yielded the most robust caloric response.