Inge Wegner1,2,3, Navid Shahnaz4, Wilko Grolman1,2, Manohar L Bance3. 1. a Department of Otorhinolaryngology - Head and Neck Surgery , University Medical Center Utrecht , Utrecht , The Netherlands. 2. b Brain Center Rudolf Magnus, University Medical Center Utrecht , Utrecht , The Netherlands. 3. c Division of Otolaryngology, Department of Surgery , Dalhousie University , Halifax , NS , Canada , and. 4. d School of Audiology & Speech Sciences, Faculty of Medicine, University of British Columbia , Vancouver , Canada.
Abstract
OBJECTIVE: To ascertain if wideband acoustic immitance (WAI) measurements are useful in assessing crimping status following stapedotomy. DESIGN: WAI measurements were obtained using the Mimosa Acoustics HearID system. Wideband chirp sound stimuli and a set of tone stimuli for nine frequencies between 0.2 and 6 kHz were used at 60 dB SPL. Five sets of measurements were performed on each temporal bone: mobile stapes, stapes fixation and stapedotomy followed by insertion of a tightly crimped, a loosely crimped and an uncrimped prosthesis. STUDY SAMPLE: Eight fresh-frozen temporal bones were harvested from human cadaveric donors. RESULTS: At lower frequencies, up to 1 kHz, stapes fixation decreased absorbance. Compared to the baseline absorbance, absorbance with stapes fixation dropped by 6 to 17% in absolute terms from the baseline value (p = 0.027). Absorbance was not affected in higher frequencies (p = 0.725). Stapedotomy changed the absorbance curve significantly compared to the normal condition with an increase of absolute absorbance values by 6 to 36% around 0.25-1 kHz (p-value <0.01). The crimping conditions did not differ from one another (p = 0.555). CONCLUSION: WAI is not useful in distinguishing between tightly crimped, loosely crimped and uncrimped stapes prostheses following stapedotomy.
OBJECTIVE: To ascertain if wideband acoustic immitance (WAI) measurements are useful in assessing crimping status following stapedotomy. DESIGN: WAI measurements were obtained using the Mimosa Acoustics HearID system. Wideband chirp sound stimuli and a set of tone stimuli for nine frequencies between 0.2 and 6 kHz were used at 60 dB SPL. Five sets of measurements were performed on each temporal bone: mobile stapes, stapes fixation and stapedotomy followed by insertion of a tightly crimped, a loosely crimped and an uncrimped prosthesis. STUDY SAMPLE: Eight fresh-frozen temporal bones were harvested from human cadaveric donors. RESULTS: At lower frequencies, up to 1 kHz, stapes fixation decreased absorbance. Compared to the baseline absorbance, absorbance with stapes fixation dropped by 6 to 17% in absolute terms from the baseline value (p = 0.027). Absorbance was not affected in higher frequencies (p = 0.725). Stapedotomy changed the absorbance curve significantly compared to the normal condition with an increase of absolute absorbance values by 6 to 36% around 0.25-1 kHz (p-value <0.01). The crimping conditions did not differ from one another (p = 0.555). CONCLUSION: WAI is not useful in distinguishing between tightly crimped, loosely crimped and uncrimped stapes prostheses following stapedotomy.
Authors: Jordan M Racca; Laura L Jones; Robert T Dwyer; Mary Ferguson; Linsey Sunderhaus; Linda J Hood; René H Gifford Journal: Am J Audiol Date: 2022-05-12 Impact factor: 1.636