Details

Autor(en) / Beteiligte

• Kopelovich, Jonathan C
• Reiss, Lina A J
• Oleson, Jacob J
• Lundt, Emily S
• Gantz, Bruce J
• Hansen, Marlan R

Titel

Risk factors for loss of ipsilateral residual hearing after hybrid cochlear implantation

Ist Teil von

• Otology & neurotology, 2014-09, Vol.35 (8), p.1403-1408

Ort / Verlag

United States

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• Residual low-frequency acoustic hearing benefits cochlear implantees in difficult listening situations such as understanding speech in noise and music appreciation. Most subjects retain functional residual hearing in the operated ear. A small number of patients, however, will lose significant ipsilateral residual hearing after short-electrode cochlear implantation. The objectives of this retrospective series are to determine whether predisposition to hearing loss after implantation exists in a subset of patients and to assess the functional impact of this hearing loss on clinical measures of combined electric and acoustic hearing. Retrospective case series. Multicenter clinical trial; tertiary care facility. Hearing preservation cochlear implant recipients. Frequency-averaged ipsilateral hearing loss at 1 year after activation. Eighty-five patients from the Hybrid S8 FDA trial had serial postoperative audiometric measurements. Twenty-two of these patients, implanted at the home institution, provided additional medical data. Univariate analysis (Pearson's, Spearman's, Student's t test) showed that the severity of hearing loss at 1 year after activation was significantly correlated with age, male gender, and noise-induced hearing loss as the etiology of hearing impairment. A multivariate regression model corroborated these variables. No other medical factors were predictive. Clinical measures of speech perception (Consonant-Nucleus-Consonant and Hearing in Noise Test) worsened with hearing loss in ipsilateral but not bilateral listening conditions. Age, male gender, and a history of noise-induced hearing loss correlate with the severity of hearing loss at 1 year after activation. Even the most severely affected patients benefit from bilateral electric and acoustic inputs.