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Caloric Stimulation with Water and Air: Responses by Age and Gender
Lilian Felipe1,2, Rocio Cavazos2
1Department of Speech and Hearing, Lamar University, Beaumont, TX. USA.
Iranian Journal of Otorhinolaryngology
|April 29, 2021
Summary
Air and water caloric stimulation yield similar results for evaluating semicircular canal function. Elderly individuals showed lower slow-phase velocity (SPV) responses in caloric testing.
Area of Science:
- Otolaryngology
- Neuroscience
- Vestibular System Assessment
Background:
- The caloric test is crucial for assessing lateral semicircular canal function.
- Standardization of air caloric stimulation is lacking due to insufficient data on response variability compared to water.
- Evaluating differences between air and water caloric stimulation is necessary due to ongoing controversy.
Purpose of the Study:
- To compare post-caloric responses between air and water stimulation methods.
- To analyze differences based on gender and age groups.
Main Methods:
- 91 participants (46 male, 45 female) without otoneurologic complaints were enrolled.
- Bithermal caloric stimulation was performed using water (44°C, 30°C) and air (50°C, 24°C).
Main Results:
- Caloric response showed no significant difference between genders (P=0.958) or between air and water stimuli (P=0.93).
- The elderly group (over 60 years) exhibited lower Slow-Phase Velocity (SPV) compared to younger groups.
Conclusions:
- Air caloric stimulation is a valid alternative to water stimulation, providing comparable absolute values.
- Reduced SPV in the elderly population indicates potential age-related changes in vestibular function.
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