Nucleus® implants

With a cochlear implant, it is essential to choose the right hearing solution for today and for the future. That’s why reliability is so important.

A mother laughs with her son in the kitchen as he wears his Nucleus device

What you'll find on this page

  • How we design Cochlear™ Nucleus implants.
  • The importance of reliability.

Cochlear Nucleus implants

We design Cochlear Nucleus implants to give the recipients their possible hearing performance for today and for the future.

Our industry leading cochlear implants are based on more than 35 years of research and innovation. Our devices are designed to suit the unique anatomy of recipient's ear and give them their possible hearing outcomes.


"I chose Cochlear because they have a very strong track record for making the newer technologies available to prior generation implants."

- Oscar, father of Chris, cochlear implant recipient

Designed for hearing performance

Our precision implants and electrodes are designed to give your patients their possible hearing performance - even in challenging listening situations.

Only Cochlear offers a thin, perimodiolar electrode with a shape that’s designed to fit the natural spiral of your patient's inner ear. The Slim Modiolar Electrode* sits close to the hearing nerve, which means it can deliver electrical stimulation to the hearing nerve more precisely3-6 and efficiently.7,8

Studies show this leads to better hearing outcomes, including improved speech recognition and understanding in both quiet and noisy environments.9-13


*The Slim Modiolar Electrode is the intracochlear electrode portion of the Cochlear™ Nucleus® Profile Series Implants CI632 and CI532.

Unmatched reliability

When someone is deciding on a hearing implant for themselves or their child, we understand they want the right solution - for today and over time.

We meet and report against the independent global standards for implant reliability, publishing data for every implant generation, past and present.14-17

So, when someone chooses a Cochlear Nucleus implant, they can trust that they have chosen the most reliable in the world.18-20

Discover the importance of implant reliability.

The world's most chosen implants

With more than 410,000 registered Cochlear Nucleus Implants worldwide, when an adult or child chooses Cochlear, they're joining the largest community of cochlear implant recipients in the world.18


Please seek advice from your health professional about treatments for hearing loss. Outcomes may vary, and your health professional will advise you about the factors which could affect your outcome. Always follow the instructions for use. Not all products are available in all countries. Please contact your local Cochlear representative for product information.

For a full list of Cochlear’s trademarks, please visit our Terms of Use page.

Views expressed are those of the individual. Consult your health professional to determine if you are a candidate for Cochlear technology.

*Unless magnet removal is necessary to reduce image artefact. If you need an MRI scan of your head, your cochlear implant magnet may need to be removed because it will distort the scan image at any MRI strength. If your magnet does need to be removed, you can feel confident that the design of the Profile Plus Series Implant makes this as swift and straightforward as possible.

  1. The following implants are designed to be compatible for MRI at 1.5 T and at 3.0 T with the magnet in place: Nucleus Profile Plus: CI612, CI622, CI632*.
  2. Compared to all currently available receiver stimulators available from Cochlear and other cochlear implant manufacturers. Based on published device specification information.
  3. Ramos de Miguel A, Argudo AA, Borkoski Barreiro SA, Falcon Gonzalez JC, Ramos Macias A. Imaging evaluation of electrode placement and effect on electrode discrimination on different cochlear implant electrode arrays. Eur Arch Otorhinolaryngol. 2018 Jun;275(6):1385-1394.
  4. Hughes ML, Abbas PJ. Electrophysiologic channel interaction, electrode pitch ranking, and behavioral threshold in straight versus perimodiolar cochlear implant electrode arrays. J Acoust Soc Am 2006; 119: 1538-47.
  5. Xi X, Ji F, Han D, Hong M, Chen A. Electrode interaction in cochlear implant recipients: comparison of straight and contour electrode arrays. ORL J Otorhinolaryngol Relat Spec 2009; 71: 228-37.
  6. Basta D, Todt I, Ernst A. Audiological outcome of the pull-back technique in cochlear implantees. Laryngoscope 2010; 120: 1391-6.
  7. Saunders E, Cohen L, Aschendorff A, Shapiro W, Knight M, Stecker M, et al. Threshold, comfortable level and impedance changes as a function of electrode-modiolar distance. Ear Hear 2002; 23(1 Suppl): 28S-40S.
  8. Parkinson AJ, Arcaroli J, Staller SJ, Arndt PL, Cosgriff A, Ebinger K. The nucleus 24 contour cochlear implant system: adult clinical trial results. Ear Hear 2002; 23(1 Suppl): 41S-8S.
  9. Shaul C, Dragovic AS, Stringer AK, O’Leary SJ, Briggs RJ. Scalar localisation of peri-modiolar electrodes and speech perception outcomes. J Laryngol Otol. 2018;132:1000–6.
  10. Cuda D, Murri A. Cochlear implantation with the nucleus slim modiolar electrode (CI532): a preliminary experience. Eur Arch Otorhinolaryngol. 2017;274:4141–8
  11. Hey, M, Hoppe, U, Stöver T, Baumann U, Mewes A, Liebscher T, Schüssler M, Aschendorrf A, Wesarg T, Büchner A, Neben N. Retrospective Hearing Performance Outcome in a Larger Cohort of CI532 Recipients; , Poster presented at 10th International Symposium on Objectives Measures in Auditory Implants (OMAI), October 2018.
  12. Friedmann DR, Kamen E, Choudhury B, Roland JT, Jr; Surgical Experience and Early Outcomes With a Slim Perimodiolar Electrode Otol Neurotol. 2019 Mar;40(3):e304-e10 NYU Cochlear Implant Center, New York (USA)
  13. Holder JT, Yawn RJ, Nassiri AM, Dwyer RT, Rivas A, Labadie RF, Gifford RH. Matched Cohort Comparison Indicates Superiority of Precurved Electrode Arrays. Otol Neurotol 2019 Oct;40(9):1160-1166.
  14. International Standard ISO 5841-2. Implants for Surgery – Cardiac Pacemakers – Part 2: Reporting of Clinical Performance of Populations of Pulse Generators or Leads. Geneva (Switzerland): International Organization for Standardization. 2000.
  15. International standard ISO 5841-2. Implants for Surgery – Cardiac Pacemakers – Part 2: Reporting of Clinical Performance of Populations of Pulse Generators or Leads. Geneva (Switzerland): International Organization for Standardisation.2014.
  16. European Consensus Statement on Cochlear Implant Failures and Explanations. Otol Neurotol. 2005 Nov;26(6):1097-9.
  17. Battmer RD, Backous DD, Balkany TJ, Briggs RJ, Gantz BJ, van Hassell A, et al. International Classification of Reliability for Implanted Cochlear Implant Receiver Stimulators. Otol Neurotol.2010 Oct;31(8):1190-3.
  18. Cochlear Limited. D1712144. Cochlear Nucleus Reliability Report (Simplified), Volume 18, December 2019. 2020, Mar.