Auditory Neuropathy Spectrum Disorder: 2011
Roush et al (2011) systematically searched 25 electronic databases for articles addressing auditory neuropathy spectrum disorder (ANSD) and hearing loss. Eighteen articles were identified. Fifteen articles (of the 18) addressed the use of cochlear implants (CIs) with regard to ANSD and four articles (of the 18) addressed hearing aid (HA) amplification. Of note, although all participants showed improved auditory performance, all 18 studies were considered exploratory and additional research will be required to address the efficacy of CIs and HAs for children with ANSD.
Their evidence-based systematic review indicated (paraphrased here):
Perhaps some 10 percent of children with permanent hearing loss may have ANSD. The majority of children studied with ANSD (to date) have presented with severe-to-profound hearing loss, additional research is needed relating to children with lesser degrees of hearing loss. Group studies have included children with multiple signs, symptoms and medical etiologies, however—well-controlled, longitudinal studies of homogenous groups of ANSD children are needed. For ANSD children using HAs and CIs, additional studies including electrophysiology as well as medical and radiological studies are needed. Documentation of HA fitting formulas, methods and verifications protocols are needed for HA successes as well as HA failures. Beyond audiological performance, a full range of developmental outcomes would be beneficial.
For More Information, References, and Recommendations
Roche JP, Huang BY, Castillo M, Bassim MK, Adunka OF, Buchman CA. (2010) Imaging Characteristics of Children with Auditory Neuropathy Spectrum Disorder. Otology & Neurotology 31(5):780–788.
Roush PA. (2011) Children with Auditory Neuropathy Spectrum Disorder. In the "Comprehensive Handbook of Pediatric Audiology." Eds Richard Seewald and Anne Marie Tharpe. Plural Publishing, San Diego, CA, pages 734-750.
Roush P, Frymark T, Venediktov R, Wang B. (2011) Audiologic Management of Auditory Neuropathy Spectrum Disorder in Children – A systematic review of the Literature. American Journal of Audiology 20(December):159-170.
Spirakis SE. (2011) Auditory Neuropathy Spectrum Disorder and Hearing Aids: Re-Thinking Fitting Strategies. Hearing Review. October.
Teagle HFB, Roush PA, Woodard JS, Hatch DR, Zdanski CJ, Buss E, Buchman CA. (2010) Cochlear Implantation in Children with Auditory Neuropathy Spectrum Disorder. Ear & Hearing 31(3):325-335.