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Doctors find cochlear implants restore hearing in rare disorder

Previous concerns about complications of cochlear implantation in FAO patients were not seen using newer surgical techniques

2012-04-21
(Press-News.org) CLEVELAND -- Clinical-researchers from University Hospitals (UH) Case Medical Center report that cochlear implantation provides an effective and safe way of restoring hearing in patients with far advanced otosclerosis (FAO), a hereditary condition that can lead to severe hearing loss.

"This is the first study to demonstrate that cochlear implants provide robust and long-term hearing restoration for patients with FAO," said lead author Maroun T. Semaan, M.D., an otolaryngologist with UH Case Medical Center and an Assistant Professor at Case Western Reserve University School of Medicine. "This is an important new treatment option for this challenging group of patients."

FAO causes abnormal growth of bone in the middle and inner ear. This bone prevents structures within the ear from working properly and it diminishes hearing. Therapies have included fluoride pills to potentially prevent development of hearing loss, but they will not improve hearing loss that has already developed. Hearing aids are commonly prescribed for patients with FAO. Surgery is an option with an operation called a stapedectomy, or stapedotomy, where an otologist (ear surgeon) bypasses the diseased bone with a prosthetic device that allows sound waves to be passed to the inner ear. However, in cases with advanced disease, stapedectomy surgery is not effective in restoring hearing, and the patient is essentially deaf, even with the strongest hearing aids.

The authors studied the records of 30 patients with FAO with age-matched controls who suffered from hearing loss from other causes besides FAO. The researchers found that previous concerns about possible complications thought to potentially affect cochlear implantation in FAO patients were not seen using newer surgical techniques.

Cliff A. Megerian, MD, senior author on the study, noted, "Although a significant percentage of these patients required the additional operative step of 'round window drill out,' this finding in no way diminished the excellent hearing outcomes enjoyed using cochlear implantation. In addition, the study showed that the presence of abnormalities on radiographic imaging did not affect hearing following implantation." Dr. Megerian is Director, Otology, Neurotology, and Cochlear Implants, UH Case Medical Center, and a Professor at Case Western Reserve University School of Medicine.

The findings were presented at the115th Annual Meeting of the Triological Society, the most prestigious meeting for ear, nose and throat specialists. Gail S. Murray, PhD, Director of Audiology Services at UH Case Medical Center, was also an author on the paper.

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The study was funded by UH Case Medical Center.

About University Hospitals

University Hospitals serves the needs of patients through an integrated network of hospitals, outpatient centers and primary care physicians. At the core of our health system is University Hospitals Case Medical Center. The primary affiliate of Case Western Reserve University School of Medicine, University Hospitals Case Medical Center is home to some of the most prestigious clinical and research centers of excellence in the nation and the world, including cancer, pediatrics, women's health, orthopedics and spine, radiology and radiation oncology, neurosurgery and neuroscience, cardiology and cardiovascular surgery, organ transplantation and human genetics. Its main campus includes the internationally celebrated UH Rainbow Babies & Children's Hospital, ranked fourth in the nation for the care of critically ill newborns; UH MacDonald Women's Hospital, Ohio's only hospital for women; and UH Seidman Cancer Center, part of the NCI-designated Case Comprehensive Cancer Center. For more information, go to www.uhhospitals.org

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[Press-News.org] Doctors find cochlear implants restore hearing in rare disorder
Previous concerns about complications of cochlear implantation in FAO patients were not seen using newer surgical techniques