Application of an Intraoperative Auditory Brainstem Response Measurement System in Active Middle Ear Implant Revision Surgery.

Objective: To investigate the benefit of intraoperative auditory brainstem response (ABR) measurements in revision active middle ear implant surgery.

Study Design: Retrospective data analysis.

Setting: Tertiary referral center with a large active middle ear implant program.

Intraoperative determination of coupling efficiency of Carina middle ear implant by means of auditory evoked potentials.

Objective: The Carina implant system is a fully implantable active middle ear implant, which can be coupled to various structures in the middle ear, depending on the nature of the hearing loss and the middle ear anatomy. Currently, there is only one method for determining the coupling efficiency of the actuator of this implant system, and this is limited to incus coupling.

Design: The proposed method is based on the intraoperative recording and evaluation of auditory brainstem responses (ABRs) while directly stimulating the hearing system via the actuator.

Intraoperative Estimation of the Coupling Efficiency and Clinical Outcomes of the Vibrant Soundbridge Active Middle Ear Implant Using Auditory Brainstem Response Measurements.

Purpose This study intraoperatively measured the coupling efficiency of the Vibrant Soundbridge (VSB), with the aim of avoiding revision surgery due to insufficient outcome. This method can also be used to test the integrity of the implant at the end of the implantation surgery and to evaluate aided thresholds. In addition, this method makes it possible to objectively test how well the VSB has been fitted, provide assistance in fitting handicapped patients or children, evaluate hearing degradation, or test for a drop in coupling efficiency before revision surgeries.

N in Solution: Isotopic Labeling and Further Details of Its Synthesis by Phenyl Pentazole Reduction.

The cyclopentazolate anion, N, has been researched extensively over the years and detected in the gas phase more than a decade ago, but was only recently measured in solution. The process whereby aryl pentazole reduction leads to the production of N is still not fully understood. Here, the production of N in solution was investigated using isotopic labeling techniques while implementing changes to the synthesis methodologies.

Device optimised chirp stimulus for ABR measurements with an active middle ear implant.

Objective: Active middle ear implants are widely used to treat adults and children with sensorineural, conductive, or mixed hearing loss. Currently, there is no adequate method to determine the performance of active middle ear implant systems.

Design: The proposed method is based on measuring the auditory brainstem response while stimulating the hearing system via the active middle ear implant (Vibrant Soundbridge, VSB; MEDEL, Austria).