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An Implant for Hearing Loss Due to Removal of Neurofibromatosis 2 Tumors

This study has been completed.
Information provided by:
FDA Office of Orphan Products Development Identifier:
First received: January 30, 2002
Last updated: March 24, 2015
Last verified: January 2002
This is a study to gather some information on the safety and efficacy of the penetrating auditory brainstem implant (PABI) in patients with neurofibromatosis type 2.

Condition Intervention Phase
Neurofibromatosis 2 Device: Penetrating auditory brainstem implant Phase 1

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Penetrating Auditory Brainstem Implant for Neurofibromatosis 2

Resource links provided by NLM:

Further study details as provided by FDA Office of Orphan Products Development:

Estimated Enrollment: 10
Study Start Date: September 2001
Estimated Study Completion Date: August 2003
Detailed Description:

Neurofibromatosis Type 2 (NF2) is characterized by multiple tumors of the cranial and spinal nerves, and, in particular, by bilateral acoustic tumors. Surgical resection of these tumors generally results in the transection of the VIIIth nerve, destruction of the cochlea and auditory nerve, and total hearing loss. Due to the loss of the auditory nerve, these patients are not candidates for cochlear implantation. The Auditory Brainstem Implant (ABI) provides the only available intervention to restore some auditory sensation to these patients. An ABI is an implantable prosthesis that produces sound sensation by electrical stimulation of the ascending auditory pathway at the level of the cochlear nucleus.

The PABI may be placed surgically during tumor resection. Efficacy will be assessed using psychophysical and standard speech reception measures.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion criteria:

  • Diagnosis of neurofibromatosis type 2
  • Speak English as a primary language

Exclusion criteria:

  • Physical, psychological, or medical conditions that contraindicate the surgical procedure
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00030043

United States, California
House Ear Institute
Los Angeles, California, United States, 90057
Huntington Medical Research Institutes
Pasadena, California, United States
United States, Colorado
Cochlear Corporation
Englewood, Colorado, United States
Sponsors and Collaborators
FDA Office of Orphan Products Development
  More Information Identifier: NCT00030043     History of Changes
Other Study ID Numbers: FD-R-001969-01
Study First Received: January 30, 2002
Last Updated: March 24, 2015

Keywords provided by FDA Office of Orphan Products Development:
Electric Stimulation
Implants, Artificial
Speech Perception

Additional relevant MeSH terms:
Neurofibromatosis 2
Nerve Sheath Neoplasms
Neoplasms, Nerve Tissue
Neoplasms by Histologic Type
Neoplastic Syndromes, Hereditary
Neurocutaneous Syndromes
Nervous System Diseases
Heredodegenerative Disorders, Nervous System
Neurodegenerative Diseases
Genetic Diseases, Inborn
Peripheral Nervous System Neoplasms
Nervous System Neoplasms
Peripheral Nervous System Diseases
Neuromuscular Diseases
Neuroma, Acoustic
Neuroendocrine Tumors
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Vestibulocochlear Nerve Diseases
Retrocochlear Diseases
Ear Diseases
Otorhinolaryngologic Diseases
Otorhinolaryngologic Neoplasms
Cranial Nerve Neoplasms
Cranial Nerve Diseases processed this record on August 18, 2017