A Comparison of Intracochlear Pressures During Ipsilateral and Contralateral Stimulation With a Bone Conduction Implant.

Ear and Hearing
Jameson K MattinglyNathaniel T Greene

Abstract

To compare contralateral to ipsilateral stimulation with percutaneous and transcutaneous bone conduction implants. Bone conduction implants (BCIs) effectively treat conductive and mixed hearing losses. In some cases, such as in single-sided deafness, the BCI is implanted contralateral to the remaining healthy ear in an attempt to restore some of the benefits provided by binaural hearing. While the benefit of contralateral stimulation has been shown in at least some patients, it is not clear what cues or mechanisms contribute to this function. Previous studies have investigated the motion of the ossicular chain, skull, and round window in response to bone vibration. Here, we extend those reports by reporting simultaneous measurements of cochlear promontory velocity and intracochlear pressures during bone conduction stimulation with two common BCI attachments, and directly compare ipsilateral to contralateral stimulation. Fresh-frozen whole human heads were prepared bilaterally with mastoidectomies. Intracochlear pressure (PIC) in the scala vestibuli (PSV) and tympani (PST) was measured with fiber optic pressure probes concurrently with cochlear promontory velocity (VProm) via laser Doppler vibrometry during stimulation provided ...Continue Reading

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Citations

Apr 3, 2020·The Journal of the Acoustical Society of America·Ivo DobrevChristof Röösli
Apr 28, 2020·Laryngoscope Investigative Otolaryngology·Ryan A BartholomewElliott D Kozin
Aug 3, 2021·Hearing Research·C RöösliF Pfiffner
Oct 27, 2021·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Morgan PotierStéphane Gallégo

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