The Effect of Stimulus Duration Using the Brookler-Grams Closed-Loop Caloric Irrigator Nystagmic responses to traditional 40-sec, 30 °C water calorics were recorded and compared to those obtained with the Brookler-Grams closed-loop irrigator using 30 °C, 40-, 50-, and 60-sec irrigations. Significant differences were noted between the responses to the water irrigator and the 40- and 50-sec closed-loop irrigations. The 60-sec closed-loop ... Research Note
Research Note  |   June 01, 1992
The Effect of Stimulus Duration Using the Brookler-Grams Closed-Loop Caloric Irrigator
 
Author Affiliations & Notes
  • Elizabeth A. Karlsen
    Otolaryngic Head & Neck Surgery Foundation Kansas City
  • C. W. Norris
    Otolaryngic Head & Neck Surgery Foundation Kansas City
  • Ruth S. Hassanein
    Department of Biometry University of Kansas Medical Center Kansas City
Article Information
Hearing / Research Note
Research Note   |   June 01, 1992
The Effect of Stimulus Duration Using the Brookler-Grams Closed-Loop Caloric Irrigator
Journal of Speech, Language, and Hearing Research, June 1992, Vol. 35, 718-719. doi:10.1044/jshr.3503.718
History: Received June 3, 1991 , Accepted October 14, 1991
 
Journal of Speech, Language, and Hearing Research, June 1992, Vol. 35, 718-719. doi:10.1044/jshr.3503.718
History: Received June 3, 1991; Accepted October 14, 1991

Nystagmic responses to traditional 40-sec, 30 °C water calorics were recorded and compared to those obtained with the Brookler-Grams closed-loop irrigator using 30 °C, 40-, 50-, and 60-sec irrigations. Significant differences were noted between the responses to the water irrigator and the 40- and 50-sec closed-loop irrigations. The 60-sec closed-loop irrigation produced responses that were equivalent to the responses obtained with the water irrigation in slow component velocity, amplitude, frequency, latency, and duration. The 30 °C 60-sec closed-loop irrigation is an acceptable stimulus in electronystagmographic caloric testing.

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