Anatomy-based Fitting in Cochear Implant Users

Official title

Anatomy-based Fitting in Unexperienced Cochlear Implant Users. Programación Basada en la anatomía en Usuarios Nuevos de Implante Coclear.

Overview

In this study, the performance with the CI is investigated over time in three groups of freshly implanted CI users. Both the standard frequency-band distribution and anatomy-based fitting will be used to compare outcomes.

Detailed description

In this study, the performance with the CI is investigated over time in three groups of freshly implanted CI users. The first group is fitted using the standard frequency-band distribution as implemented in MAESTRO 9. In the second group of users, an anatomy-based frequency distribution is used as per anatomy-based fitting in MAESTRO 9. The performance with anatomy-based fitting is assessed by comparing performance with the CI in these two groups over time.

The third group constitutes the within-subject design. These subjects are both fitting using the standard frequency-band distribution and the anatomy-based frequency distribution in MAESTRO 9. So, subjects will have both study maps on their audio processor throughout the whole study. They will have to change weekly between both fittings: standard fitting and anatomy-based fitting. Here, the performance with anatomy-based fitting is assessed by comparing performance with standard fitting and anatomy-based fitting.

Interventions

• Procedure Anatomy-based fitting (ABF)
  MAESTRO 9 can display the tonotopic frequency of each individual electrode channel imported from OTOPLAN to further support fitting based on these measures. The audiologist can set a frequency-band distribution that is more closely aligned to the tonotopic frequency distribution as imported from OTOPLAN.
• Procedure Standard Fitting
  These group is fitted using the standard frequency-band distribution as implemented in MAESTRO 9.
• Procedure Standard fitting+ ABF
  Patients of this group are both fitting using the standard frequency-band distribution and the anatomy-based frequency distribution in MAESTRO 9. So, subjects will have both study maps on their audio processor throughout the whole study. They will have to change weekly between both fittings: standard fitting and anatomy-based fitting. Here, the performance with anatomy-based fitting is assessed by comparing performance with standard fitting and anatomy-based fitting.

Primary outcome measures

• Result from the speech test in noise (S0N0) [Time frame: Month 6]
• Results from speech tests in noise with spatially separated loudspeakers [Time frame: Month 6]
• Result from the speech test in quiet (S0) [Time frame: Month 6]

Secondary outcome measures (2)

• Results of quality of sound [Time frame: Month 6]
• Results of quality of life in challenging situations [Time frame: Month 6]

Eligibility criteria

Inclusion criteria

• Age ≥ 18 years
• Post-lingual onset of severe to profound sensory-neural hearing loss in the implanted ear(s)
• Post-OP CT scan of the CI electrode available
• Subject implanted with MED-EL cochlear implant(s)
• Subjects received a Flex28 or FlexSoft electrode
• Subject planned to receive a SONNET 2 /RONDO3 audio processor on the newly implanted side
• Audio processor not yet activated on the newly implanted side
• The most apical active electrode contact has to be inserted at least 450°
• Minimum of 10 active channels can be activated
• Fluent in Spanish
• Signed and dated ICF before the start of any study-specific procedure

Specific inclusion criteria for the possible study groups • Bilateral CI users: Bilateral CI implantation SONNET 2/RONDO3 audio processor on the first ear implanted

• 40% speech recognition a monosyllabic word Test in quiet at 65 dB SPL (last time tested) on the already implanted side
• 40% speech recognition in a sentence test in noise (10 dB SNR) on the already implanted side First activation of the already implanted side between 3 and 12 months prior to study inclusion

• Unilateral CI users: Unilateral CI implantation CI user with contralateral hearing ≥ 60 dB (PTA measured at 500, 1000, 2000, and 4000 Hz)

• SSD CI users: Unilateral CI implantation CI user with contralateral hearing ≤30 dB (PTA measured at 500, 1000, 2000, and 4000 Hz) Interaural threshold gap ≥40 dB

• Bimodal CI users: Unilateral CI implantation Contralateral ear adequately fitted with a hearing aid CI user with contralateral hearing ≥30 dB (PTA measured at 500, 1000, 2000, and 4000 Hz) CI user with contralateral hearing ≤55 dB (PTA measured at 500, 1000, 2000, and 4000 Hz) Interaural threshold gap ≥15 dB

Exclusion criteria

• Lack of compliance with any inclusion criteria
• EAS user (user of an EAS audio processor)
• Implanted with C40+, C40X and C40C
• Implanted with an ABI or Split electrode array
• Known allergic reactions to components of the investigational medical device
• Anything that, in the opinion of the Investigator, would place the subject at increased risk or preclude the subject's full compliance with or completion of the study

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Allocation

Randomized

Model

Parallel assignment

Masking

Open label

Primary purpose

Other

Study locations

Spain · 1 center

• Hospital Universitario de La Paz — Madrid

Identifiers

NCT: NCT05360212 · PI-6128

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗