title: Hearing preservation and cochlear implants according to inner ear approach: multicentric evaluation.
abstract: BACKGROUND
  Electroacoustic stimulation is an excellent option for people with residual hearing in the low frequencies, who obtain insufficient benefit with hearing aids. To be effective, the subject's residual hearing should be preserved during cochlear implant surgery.
  
  
  OBJECTIVE
  To evaluate the hearing preservation in patients that underwent implant placement and to compare the results in accordance with the approach to the inner ear.
  
  
  METHODS
  19 subjects underwent a soft surgical technique, and the electrode MED-EL FLEX™ EAS, designed to be atraumatic, was used. We evaluated pre- and postoperative tonal audiometric tests with an average of 18.4 months after implantation, to measure the rate of hearing preservation.
  
  
  RESULTS
  17 patients had total or partial preservation of residual hearing; 5 had total hearing preservation and two individuals had no preservation of hearing. The insertion of the electrode occurred through a cochleostomy in 3 patients, and in 2 of these there was no hearing preservation; the other 16 patients experienced electrode insertion through a round window approach. All patients benefited from the cochlear implant, even those who are only using electrical stimulation.
  
  
  CONCLUSIONS
  The hearing preservation occurred in 89.4% of cases. There was no significant difference between the forms of inner ear approach.
authors: Faculdade de Ciências Médicas, Universidade Estadual de Campinas (FCM/UNICAMP), Campinas, SP, Brazil. Electronic address: alecgxl2@hotmail.com.
authors: Alexandre Caixeta
authors: AC
authors: Guimarães
authors: Faculdade de Ciências Médicas, Universidade Estadual de Campinas (FCM/UNICAMP), Campinas, SP, Brazil.
authors: Guilherme Machado de
authors: GM
authors: Carvalho
authors: Faculdade de Ciências Médicas, Universidade Estadual de Campinas (FCM/UNICAMP), Campinas, SP, Brazil.
authors: Alexandre S M
authors: AS
authors: Duarte
authors: Faculdade de Ciências Médicas, Universidade Estadual de Campinas (FCM/UNICAMP), Campinas, SP, Brazil.
authors: Walter A
authors: WA
authors: Bianchini
authors: Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors: Andrea Bravo
authors: AB
authors: Sarasty
authors: Universidade Nacional de Córdoba, Córdoba, Argentina.
authors: Maria Fernanda di
authors: MF
authors: Gregorio
authors: Universidade Católica de Córdoba, Córdoba, Argentina.
authors: Mario Emilio
authors: ME
authors: Zernotti
authors: CBMEG, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors: Edi Lúcia
authors: EL
authors: Sartorato
authors: Department of Otolaryngology and Ophthalmology, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors: Arthur Menino
authors: AM
authors: Castilho
mesh_terms: D000328:Adult; D000368:Aged; D001309:Auditory Threshold; D019929:Cochlear Implantation / Q000379:methods*; D003054:Cochlear Implants; D004558:Electric Stimulation; D005260:Female; D046088:Hearing Loss, Unilateral / Q000175:diagnosis* / Q000601:surgery*; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011446:Prospective Studies; D017755:Prosthesis Fitting; D012405:Round Window, Ear / Q000601:surgery; D013067:Speech Perception; D014432:Tympanic Membrane / Q000601:surgery; D055815:Young Adult
keywords: Bilateral hearing loss; Cochlear implants; Correction of hearing impairment; Correção de deficiência auditiva; Implante coclear; Inner ear; Orelha interna; Perda auditiva bilateral
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