NDLI: Intraoperative round window recordings to acoustic stimuli from cochlear implant patients.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Choudhury, Baishakhi Fitzpatrick, Douglas C. Buchman, Craig A. Wei, Benjamin P. Dillon, Margaret T. He, Shuman Adunka, Oliver F.
Description	Country affiliation: United States Author Affiliation: Choudhury B ( Department of Otolaryngology/Head and Neck Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7070, USA.)
Abstract	HYPOTHESIS: Acoustically evoked neural and hair cell potentials can be measured from the round window (RW) intraoperatively in the general population of cochlear implant recipients. BACKGROUND: Cochlear implant performance varies greatly among patients. Improved methods to assess and monitor functional hair cell and neural substrate before and during implantation could potentially aid in enhanced nontraumatic intracochlear electrode placement and subsequent improved outcomes. METHODS: Subjects (1-80 yr) undergoing cochlear implantation were included. A monopolar probe was placed at the RW after surgical access was obtained. The cochlear microphonic (CM), summating potential (SP), compound action potential (CAP), and auditory nerve neurophonic (ANN) were recorded in response to tone bursts at frequencies of 0.25 to 4 kHz at various levels. RESULTS: Measurable hair cell/neural potentials were detected to 1 or more frequencies in 23 of 25 subjects. The greatest proportion and magnitude of cochlear responses were to low frequencies (<1,000 Hz). At these low frequencies, the ANN, when present, contributed to the ongoing response at the stimulus frequency. In many subjects, the ANN was small or absent, whereas hair cell responses remained. CONCLUSION: In cochlear implant recipients, acoustically evoked cochlear potentials are detectable even if hearing is extremely limited. Sensitive measures of cochlear and neural status can characterize the state of hair cell and neural function before implantation. Whether this information correlates with speech performance outcomes or can help in tailoring electrode type, placement or audiometric fitting, can be determined in future studies.
File Format	HTM / HTML
ISSN	15317129
e-ISSN	15374505
DOI	10.1097/MAO.0b013e31826dbc80
Journal	Otology & Neurotology
Issue Number	9
Volume Number	33
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2012-12-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Research Support, N.i.h., Extramural Therapy Research Support, Non-u.s. Gov't Hair Cells, Auditory Audiometry Cochlear Nerve Child, Preschool Infant Electroencephalography Action Potentials Etiology Surgery Physiology Monitoring, Intraoperative Data Interpretation, Statistical Acoustic Stimulation Neurons Discipline Otolaryngology Auditory Threshold Evoked Potentials, Auditory Cochlear Implantation Round Window, Ear Audiometry, Evoked Response Adolescent Hearing Loss Cochlear Microphonic Potentials
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Sensory Systems Neurology (clinical)

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Round window electrocochleography just before cochlear implantation: relationship to word recognition outcomes in adults.

Intraoperative monitoring using cochlear microphonics in cochlear implant patients with residual hearing.

Electrophysiologic consequences of flexible electrode insertions in gerbils with noise-induced hearing loss.

Cochlear implant-evoked cortical activation in children with cochlear nerve deficiency.

Third-window vibroplasty with an active middle ear implant: assessment of physiologic responses in a model of stapes fixation in Chinchilla lanigera.

Functional magnetic resonance imaging of hearing-impaired children under sedation before cochlear implantation.

Impact of hair cell preservation in cochlear implantation: combined electric and acoustic hearing.

Exploration fonctionnelle du nerf cochléaire et de l'audition.

Detection of intracochlear damage with cochlear implantation in a gerbil model of hearing loss.

Intraoperative round window recordings to acoustic stimuli from cochlear implant patients.

Similar Documents

Round window electrocochleography just before cochlear implantation: relationship to word recognition outcomes in adults.

Intraoperative monitoring using cochlear microphonics in cochlear implant patients with residual hearing.

Electrophysiologic consequences of flexible electrode insertions in gerbils with noise-induced hearing loss.

Cochlear implant-evoked cortical activation in children with cochlear nerve deficiency.

Third-window vibroplasty with an active middle ear implant: assessment of physiologic responses in a model of stapes fixation in Chinchilla lanigera.

Functional magnetic resonance imaging of hearing-impaired children under sedation before cochlear implantation.

Impact of hair cell preservation in cochlear implantation: combined electric and acoustic hearing.

Exploration fonctionnelle du nerf cochléaire et de l'audition.

Detection of intracochlear damage with cochlear implantation in a gerbil model of hearing loss.

Intraoperative round window recordings to acoustic stimuli from cochlear implant patients.