Article  |   June 2007
Stapedial Reflex and Ears With High Static Acoustic Admittance
Author Affiliations & Notes
  • Dennis T. Ries
    University of North Texas, Denton
  • Contact author: Jeffrey J. DiGiovanni, School of Hearing, Speech, and Language Sciences, W222 Grover Center, Ohio University, Athens, OH 45701. E-mail: digiovan@ohio.edu.
  • Dennis T. Ries is currently affiliated with Ohio University, Athens.
    Dennis T. Ries is currently affiliated with Ohio University, Athens.×
Article Information
Hearing & Speech Perception / Acoustics / Hearing Disorders
Article   |   June 2007
Stapedial Reflex and Ears With High Static Acoustic Admittance
American Journal of Audiology, June 2007, Vol. 16, 68-74. doi:10.1044/1059-0889(2007/006)
History: Received May 15, 2006 , Accepted April 3, 2007
American Journal of Audiology, June 2007, Vol. 16, 68-74. doi:10.1044/1059-0889(2007/006)
History: Received May 15, 2006; Accepted April 3, 2007

Purpose: To evaluate modified acoustic reflex diagnostic protocols for a group of individuals (n = 9) with high peak compensated static acoustic admittance (Ytm) tympanograms.

Method: A modified procedure designed to improve acoustic stapedius reflex threshold (ASRT) measurements in individuals with high-admittance tympanograms was employed in both an experimental and a control group. ASRTs were measured at 0.5, 1.0, and 2.0 kHz, ipsilateral and contralateral. Measurements were obtained within each condition for 7 ear canal pressures that were set to 0, ±50, ±100, and ±150 daPa (relative to tympanometric peak pressure [TPP]).

Results: Though measuring ASRTs at −50 daPa (relative to TPP) in the high-admittance and normal groups did not result in significantly better thresholds than at TPP, the absent reflex rate was reduced when the ear canal pressure was changed by −50 daPa during ASRT measurements.

Conclusions: Based on this sample, it is suggested that a patient presenting with high peak compensated static acoustic admittance (peak Ytm ≥ 2.1 mmho) undergo ASRT evaluation with the ear canal pressure set to −50 daPa (relative to TPP).

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