Cochlear implants: our experience and literature review

Summary

Introduction: Cochlear Implants are important for individuals with severe to profound bilateral sensorineural hearing loss.

Objective: Evaluate the experience of cochlear implant center of Otorhinolaryngology through the analysis of records of 9 patients who underwent cochlear implant surgery.

Methods: This is a retrospective study performed with the patients records. Number 0191.0.107.000-11 ethics committee approval. We evaluated gender, etiology, age at surgery, duration of deafness, classification of deafness, unilateral or bilateral surgery, intraoperative and postoperative neural response and impedance of the electrodes in intraoperative and preoperative tests and found those that counter-indicated surgery.

Results: There were 6 pediatric and 3 adult patients. Four male and 5 female. Etiologies: maternal rubella, cytomegalovirus, ototoxicity, meningitis, and sudden deafness. The age at surgery and duration of deafness ranged from 2–46 years and 2–18 years, respectively. Seven patients were pre-lingual. All had profound bilateral PA. There were 7 bilateral implants. Intraoperative complications: hemorrhage. Complications after surgery: vertigo and internal device failure. In 7 patients the electrodes were implanted through. Telemetry showed satisfactory neural response and impedance. CT and MRI was performed in all patients. We found enlargement of the vestibular aqueduct in a patient and incudomalleolar malformation.

Conclusion: The cochlear implant as a form of auditory rehabilitation is well established and spreading to different centers specialized in otoaudiology. Thus, the need for structured services and trained professionals in this type of procedure is clear.

Keywords

cochlear implants - hearing loss - hearing loss - sensorineural

• References

• 1 Luxford W, Brackmann D. The history of cochlear implantes. In: Gray R, , ed. Cochlear implantes. San Diego: College Hill Press; 1985. 10. 1100-6
• 2 Bevilacqua MC, Moret ALM, Costa Filho AO, Nascimento LT, Banhara MR. Implantes cocleares em crianças portadoras de deficiência auditiva decorrente de meningite. Braz J Otorhinolaryngol 1994; 60 (4) 1-16
• 3 Lima Júnior LRP, Rocha MD, Walsb PV, Antunes CA, Calhau CMDF. Avaliação por imagem nos candidatos ao implante coclear: correlação radiológico-cirúrgica. Braz J Otorhinolaryngol 2008; 74 (3) 395-400
• 4 Lima Júnior LRP, Rodrigues Júnior FA, Calhau CMDF, Calhau ACDF, Palhano CTP. Complicações pós-cirúrgicas em pacientes impantados no Programa de Implante Coclear do Rio Grande do Norte. Braz J Otorhinolaryngol 2010; 76 (4) 517-21
• 5 Nóbrega M. Deficiência auditiva na infância: a experiência do ambulatório de deficiência auditiva da UNIFESP/EPM. Anais do 170 Encontro Internacional de Audiologia. Bauru; 2002.
• 6 Reis DC. Saúde auditiva em João Pessoa. [mestrado]. São Paulo (SP): Pontifícia Universidade Católica de São Paulo; 2006
• 7 Egeli E, Ciçekci G, Silan F, Oztürk O, Harputluoglu U, Onur A , et al. Etiology of deafness at the Yeditepe school for the deaf in Istanbul. Int J Pediatr Otorhinolaryngol 2003; 67 (5) 467-71
• 8 Calháu CMDF, Lima Júnior LRP, Reis AMCS, Capistrano AKB, Lima DVSP, Calháu ACDF , et al. Perfil etiológico dos pacientes implantados do Programa de Implante Coclear. Braz J Otorhinolaryngol 2011; 77 (1) 13-8
• 9 Cohen NL, Hoffman RA. Complications of cochlear implant surgery in adults and children. Ann Otol Rhinol Laryngol 1991; 100: 708-11
• 10 Dutt SN, Ray J, Hadjihannas E, Cooper H, Donalds I, Proops D. Medical and surgical complications of the second 100 adult cochlear implant patients in Birmingham. J Laryngol Otol 1996;
• 11 Hoffman RA, Cohen NL. Complications of cochlear implant surgery. Ann Otol Rhinol Laryngol 1995; 166: 420-2
• 12 Collins MM, Hawthorne MH, el Hmd K. Cochlear implantation in a district general hospital: problems and complications in the first five years. J Laryngol Otol 1997; 111: 325-32
• 13 Aschendorff A, Marangos N, Laszig R. Complications and reimplantation. Adv Otorhinolaryngol 1997; 52: 167-70
• 14 Lai W. An NRT Cookbook: Guidelines for making NRT measurements. 1st ed. Zürich: Cochlear AG; 1999
• 15 O'neill C, O'donoghue GM, Archbold SM, Nikolopoulos TP, Sach T. Variations in gains in auditory performance from pediatric cochlear implantation. Otol Neurotol 2002; 23 (1) 44-48
• 16 Richter B, Eibele S, Laszig R, Löhle E. Receptive and expressive language skills of 106 children with a minimum of 2 years'experience in hearing with a cochlear implant. Int J Pediatr Otorhinolaryngol 2002; 64 (2) 111-25
• 17 Kirk KI, Miyamoto RT, Lento CL, Ying E, O'neill T, Fears B. Effects of age at implantation in young children. Ann Otol Rhinol Laryngol 2002; 111 (5) 69-73
• 18 Baumgartner WD, Pok SM, Egelierler B, Franz P, Gstoettner W, Hamzavi J. The role of age in pediatric cochlear implantation. Int J Pediatr Otorhinolaryngol 2002; 62 (3) 223-28
• 19 Miyamoto RT, Houston DM, Kirk KI, Perdew AE, Svirsky MA. Language development in deaf infants following cochlear implantation. Acta Otolaryngol 2003; 123 (2) 241-44
• 20 Nicholas JG, Geers AE. Will they catch up? The role of age at cochlear implantation in the spoken language development of children with severe to profound hearing loss. J Speech Lang Hear Res 2007; 50 (4) 1048-62
• 21 Flipsen Jr P, Colvard LG. Intelligibility of conversational speech produced by children with cochlear implants. J Commun Disord 2006; 39 (2) 93-108
• 22 Ramirez IJM, Nikolopoulos TP. Cochlear Implantation in children deafened by cytomegalovirus: Speech perception and speech intelligibility outcomes. Otology & Neurotology 2004; 25 (4) 479-82