- Monday, 17 June, 2019 - Thursday, 17 June, 2021
8:00 am - 5:00 pm
Surgical Techniques for Hearing Preservation
A/Prof Catherine Birman
Preserving residual hearing and preserving cochlea structures are key considerations in the development of modern cochlear implant surgical techniques and device technologies. Hearing and structural preservation has lead to better outcomes, expanding criteria and potentially greater future opportunities.
This talk will present research regarding patient factors, device factors and surgical factors all aimed at minimising electrode insertion trauma that can all help optimise hearing preservation. The main factors identified are soft surgical techniques; fine, soft, short electrodes, minimising inner ear trauma; and reducing immune response. Novel areas of research will also be presented which in the future may contribute to our ability to preserve residual hearing in an even greater proportion of patients.
Intraoperative Monitoring of Residual Hearing
Dr WaiKong Lai
Preservation of residual acoustic hearing can be determined by objective means such as electrocochleography (ECochG), which involve a suitable measurement amplifier and sensor electrodes to record these ECochG signals. Recent models of cochlea implants are equipped with measurement circuits that are able to record the ECochG signals using the intracochlear electrodes. The Cochlear Response Telemetry (CREST) research tool is based on a prototype system developed by the University Melbourne in collaboration with Cochlear Limited, consists of both the hardware and software to present the acoustic signal as well as capture, store and analyse the measured ECochG signals.
In the current study, acoustically evoked ECochG will be measured using the CREST tool during the surgical insertion of the electrode array and during placement and fixation of the implant. Specifically, the ECochG measurements aim to characterise a specific component of the signal called the cochlear microphonic (CM) during the insertion of the electrode array. Previous research has identified a relationship between changes in the CM during surgical implantation and post-operative hearing preservation. The clinical data collected in this study will provide important input towards understanding how best to utilise the CM recording as a clinical tool for surgeons during hearing preservation surgery. In addition to the intra-operative measures, the current study will collect ECochG at 6-weeks and 3-months post-implantation.
This presentation will describe and discuss the CREST research tool, it’s applications and implications.
Fitting Hybrid Devices – Protocols and Challenges
Modern technological advances have seen a change in selection criteria determining cochlear implant (CI) candidacy, leading to an increase in the number of CI recipients with residual acoustic hearing. However, despite SCIC’s install base of approximately 3500 CI users, only 2 % of recipients have accessed hybrid technology. Of these, 30 % had reported noticing an improvement in sound quality with many stating the sound seemed “fuller” and “more rounded”. Over 50 % no longer use the hybrid device due to a drop in their remaining residual hearing or reports of discomfort.
This talk will assess the benefits of preserving residual hearing and amplifying acoustic sound with hybrid CI devices. Results will look at client access to technology and preferences and touch on overall cost effectiveness. SCIC’s hybrid fitting protocol will also be explored in this talk with a particular focus on the challenges faced by clinicians during hybrid electro-acoustic device fittings and important factors in counselling clients with residual hearing post implantation.
These are accessible and convenient to be viewed at any time. These sessions are presented by local staff at RIDBC, as well as national and international experts. If a course or webinar is accredited through either The NSW Education Standards Authority (NESA), formerly known as BOSTES, AG Bell or Audiology Australia, it will be indicated within the description of the webinar. If you are unsure and would like further information regarding accreditation, please contact Carla Silveira, Events and Administration Coordinator (email@example.com).
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