Hearing Preservation in Cochlear Implantation Surgery
Key facts
- Where
- Utrecht, NetherlandsSee the site
Where in Netherlands
- University Medical Center UtrechtUtrecht, NetherlandsContact: Hans GXM Thomeer, MD, PhDTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- UMC Utrecht
- Trial code
- NCT07146841
- Record updated
- 28 August 2025
- Original description
In order to preserve the residual hearing in patients with sensorineural hearing loss (SNHL) receiving a cochlear implant (CI), the insertion trauma to the delicate and microscopic structures of the cochlea needs to be minimized. The surgical procedure starts with the conventional mastoidectomy-posterior tympanotomy (MPT) approach to the middle ear, and is followed by accessing the cochlea, with either a cochleostomy (CO) or via the round window (RW). Both techniques have their benefits and disadvantages. Another aspect is the design of the electrode array. There are fundamentally two different designs: a *straight* lateral wall lying electrode array (LW), or a *pre-curved* perimodiolar cochlear lying electrode array (PM). Interestingly, until now, the best surgical approach and type of implant is unknown. Our hypothesis is that the combination of a RW approach and a LW lying electrode array minimizes insertion trauma, leading to better hearing outcome for SNHL patients.Read full original descriptionShow less
Evaluating Cochlear Insertion Trauma and Hearing Preservation After Cochlear Implantation (CIPRES): a Study Protocol for a Randomized Single-blind Controlled Trial
In order to preserve the residual hearing in patients with sensorineural hearing loss (SNHL) receiving a cochlear implant (CI), the insertion trauma to the delicate and microscopic structures of the cochlea needs to be minimized. The surgical procedure starts with the conventional mastoidectomy-posterior tympanotomy (MPT) approach to the middle ear, and is followed by accessing the cochlea, with either a cochleostomy (CO) or via the round window (RW). Both techniques have their benefits and disadvantages. Another aspect is the design of the electrode array. There are fundamentally two different designs: a *straight* lateral wall lying electrode array (LW), or a *pre-curved* perimodiolar cochlear lying electrode array (PM). Interestingly, until now, the best surgical approach and type of implant is unknown. Our hypothesis is that the combination of a RW approach and a LW lying electrode array minimizes insertion trauma, leading to better hearing outcome for SNHL patients.
Inclusion: Severe hearing loss, CI candidate; 18 years of age or older; normal function of middle ear (i.e. no acute middle ear infections); dutch language proficiency; choice for Advanced Bionics implant.
Exclusion: prior otologic surgery in the implanted ear (excluding tympanostomy tube placement); neurocognitive disorders; inner ear malformation present in the ear to be implanted (i.e. ossification, Mondini malformation); retrocochlear pathology present in the auditory system to be implanted; sudden deafness.