Question
Can you define the differences in sensitivity of procedures such as the Cochlear Hydrops Analysis Masking Procedure (CHAMP) and the VEMP in identifying endolymphatic hydrops versus cochlear hydrops?
Answer
Well, it's a good question. I don't think the VEMP at this point is as sensitive to endolymphatic hydrops of the saccule as electrocochleography and other methods that we have of identifying cochlear hydrops. I think VEMP needs some fine-tuning before it will identify saccular hydrops with maybe 75-80% sensitivity. Currently, the sensitivity of CHAMP is far superior to that of the standard VEMP analysis that is currently used in clinical and research practice.
Dr. Ackley is Director of Audiology at Gallaudet University and former department chair at the University of Northern Colorado and Associate Professor at Colorado State University prior to that. He had an electrophysiological assessment private practice in Colorado from 1987-2000, and he currently directs the Gallaudet Electrophysiology and Balance Center. He has done extensive research on vestibular evoked myogenic potential (VEMP) assessment of Deaf and hard-of-hearing subjects during his tenure at Gallaudet.
Professor and Director, Audiology, Gallaudet University, Washington, DC Affiliate Professor, Department of Biology, Colorado State University, 1992-2003 Faculty Affiliate, Communication Disorders, University of Northern Colorado, 2000-2005 Language Fluency: American Sign Language;Advanced Rating (Gallaudet SCPI) Certification: CCC-A Education: 1983, Ph.D., University of Colorado, Communication Disorders 1972, M.Ed., Western Maryland College, Deaf Education 1968, B.S., Cornell College, Psychology Dr. Ackley is Director of Audiology at Gallaudet University and former department chair at the University of Northern Colorado and Associate Professor at Colorado State University prior to that. He had an electrophysiological assessment private practice in Colorado from 1987-2000, and he currently directs the Gallaudet Electrophysiology and Balance Center. He has done extensive research on vestibular evoked myogenic potential (VEMP) assessment of Deaf and hard-of-hearing subjects during his tenure at Gallaudet.
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