European Archives of Oto-Rhino-Laryngology

, Volume 270, Issue 4, pp 1507-1512

First online:

Multicenter evaluation of Neurelec Digisonic® SP cochlear implant reliability

  • Luminiţa RădulescuAffiliated withENT Department, Rehabilitation Hospital, University of Medicine and Pharmacy “Gr. T. Popa” Email author 
  • , Sebastian CozmaAffiliated withENT Department, Rehabilitation Hospital, University of Medicine and Pharmacy “Gr. T. Popa”
  • , Casimir NiemczykAffiliated withENT Department, University Hospital Banacha
  • , Nicolas GuevaraAffiliated withENT Department, Pasteur Hospital
  • , Ivan GahideAffiliated withENT Department, Pasteur Hospital
  • , John EconomidesAffiliated withENT Department, General Children’s Hospital Aghia Sophia
  • , Jean-Pierre LavieilleAffiliated withENT Department, Nord Hospital
  • , Renaud MellerAffiliated withENT Department, Nord Hospital
  • , Jean-Pierre BébéarAffiliated withENT Department, Pellegrin Hospital, University of Bordeaux
    • , Emilien RadafyAffiliated withENT Department, University Hospital Nantes
    • , Philippe BordureAffiliated withENT Department, University Hospital Nantes
    • , Djamel DjennaouiAffiliated withENT Department, University Hospital Mustafa
    • , Eric TruyAffiliated withENT Department, Edouard Herriot University Hospital, Hospices Civils de LyonINSERM U1028–CNRS UMR5292, Lyon Neuroscience Research Center, Brain Dynamics and Cognition Team, University of Lyon

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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 rate Cumulative survival rate Reliability Cochlear implant