European Archives of Oto-Rhino-Laryngology

, Volume 270, Issue 4, pp 1507–1512

Multicenter evaluation of Neurelec Digisonic® SP cochlear implant reliability


    • ENT Department, Rehabilitation HospitalUniversity of Medicine and Pharmacy “Gr. T. Popa”
  • Sebastian Cozma
    • ENT Department, Rehabilitation HospitalUniversity of Medicine and Pharmacy “Gr. T. Popa”
  • Casimir Niemczyk
    • ENT DepartmentUniversity Hospital Banacha
  • Nicolas Guevara
    • ENT DepartmentPasteur Hospital
  • Ivan Gahide
    • ENT DepartmentPasteur Hospital
  • John Economides
    • ENT DepartmentGeneral Children’s Hospital Aghia Sophia
  • Jean-Pierre Lavieille
    • ENT DepartmentNord Hospital
  • Renaud Meller
    • ENT DepartmentNord Hospital
  • Jean-Pierre Bébéar
    • ENT DepartmentPellegrin Hospital, University of Bordeaux
  • Emilien Radafy
    • ENT DepartmentUniversity Hospital Nantes
  • Philippe Bordure
    • ENT DepartmentUniversity Hospital Nantes
  • Djamel Djennaoui
    • ENT DepartmentUniversity Hospital Mustafa
  • Eric Truy
    • ENT DepartmentEdouard Herriot University Hospital, Hospices Civils de Lyon
    • INSERM U1028–CNRS UMR5292, Lyon Neuroscience Research CenterBrain Dynamics and Cognition Team, University of Lyon

DOI: 10.1007/s00405-012-2266-2

Cite this article as:
Rădulescu, L., Cozma, S., Niemczyk, C. et al. Eur Arch Otorhinolaryngol (2013) 270: 1507. doi:10.1007/s00405-012-2266-2


Over the past decade, the adoption of universal hearing screening in newborns has led to earlier detection of hearing problems and significant lowering of the age of first cochlear implantation. As a consequence, recipients are now expected to keep their cochlear implants (CIs) for a longer period of time. Comprehensive longitudinal information on CI reliability is essential for device choice. The aim of this study was to assess the reliability (in children and adults) of the latest generation of the Digisonic® SP CI launched in 2006 by Neurelec. Failure rate (FR) and cumulative survival rate (CSR) for a 5-year period were calculated. This survey is a multicenter retrospective study. A questionnaire was sent to nine CI centers requesting information about patients implanted with Neurelec Digisonic® SP CIs. FR and CSR over a 5-year period were calculated on this group. Collaborating centers collected data on 672 patients (362 children and 310 adults) implanted between March 2006 and March 2011. The overall rate of explantation was 2.23 % (15 cases): six devices were explanted due to device failure (0.89 %) and nine were explanted for medical reasons (1.34 %). Four patients were lost to follow-up. The CSR at 5 years was 98.51 % on all patients, 98.48 % for children and 98.57 % for adults. FR was 0.97 % for adults and 0.83 % for children. This first independent study that assesses FR and CSR on the current generation of Digisonic® SP CI represents an important resource that can help clinicians and patients during their device choice.


Failure rateCumulative survival rateReliabilityCochlear implant

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© Springer-Verlag Berlin Heidelberg 2012