title: Wideband acoustic immittance measurements in assessing crimping status following stapedotomy: A temporal bone study.
abstract: To ascertain if wideband acoustic immitance (WAI) measurements are useful in assessing crimping status following stapedotomy.
  
  
  
  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.
  
  
  
  Eight fresh-frozen temporal bones were harvested from human cadaveric donors.
  
  
  
  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).
  
  
  
  WAI is not useful in distinguishing between tightly crimped, loosely crimped and uncrimped stapes prostheses following stapedotomy.
authors.affiliation: a Department of Otorhinolaryngology - Head and Neck Surgery , University Medical Center Utrecht , Utrecht , The Netherlands.|b Brain Center Rudolf Magnus, University Medical Center Utrecht , Utrecht , The Netherlands.|c Division of Otolaryngology, Department of Surgery , Dalhousie University , Halifax , NS , Canada , and.
authors.forename: Inge
authors.initials: I
authors.lastname: Wegner
authors.affiliation: d School of Audiology & Speech Sciences, Faculty of Medicine, University of British Columbia , Vancouver , Canada.
authors.forename: Navid
authors.initials: N
authors.lastname: Shahnaz
authors.affiliation: a Department of Otorhinolaryngology - Head and Neck Surgery , University Medical Center Utrecht , Utrecht , The Netherlands.|b Brain Center Rudolf Magnus, University Medical Center Utrecht , Utrecht , The Netherlands.
authors.forename: Wilko
authors.initials: W
authors.lastname: Grolman
authors.affiliation: c Division of Otolaryngology, Department of Surgery , Dalhousie University , Halifax , NS , Canada , and.
authors.forename: Manohar L
authors.initials: ML
authors.lastname: Bance
mesh_terms: D000162:Acoustics; D001844:Bone Conduction; D002102:Cadaver; D006314:Hearing Loss, Conductive / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D009998:Ossicular Prosthesis; D010027:Osteotomy / Q000009:adverse effects; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation*; D013201:Stapes Surgery / Q000009:adverse effects / Q000295:instrumentation*; D013701:Temporal Bone / Q000503:physiopathology / Q000601:surgery*
keywords: Otosclerosis; absorbance; acoustic resistance; hearing loss; immitance; impedance; middle ear; power absorption; reflectance; stapedotomy; stapes; surgery; temporal bone; transmittance; wideband