Estimations of auditory sensitivity for young cochlear implant candidates using the ASSR: preliminary results

Int J Audiol. 2004 Jul-Aug;43(7):377-82. doi: 10.1080/14992020400050048.

Abstract

This paper presents preliminary results obtained with the use of the auditory steady-state response (ASSR) technique as part of a cochlear implant candidacy assessment protocol for infants Fifteen infants (30 ears), between 10 and 60 months of age, with severe-to-profound hearing loss participated in the study. ASSR measurements were performed for 0.5, 1, 2 and 4kHz at intensities up to 120-128dB HL. The ASSR thresholds were obtained in 74%, of the measurements, and exceeded the maximum auditory brainstem response (ABR) intensity output in 91% of cases and the maximum free-field behavioral intensity output in 84% of cases. Eighty-seven per cent of ASSR threshold measurements were measured at intensities of 100dB HL or higher, and almost half (47%) were measured at intensities of 115 dB HL and higher. Preliminary results indicate that absent ABR and behavioral thresholds do not preclude the possibility of residual hearing, making the ASSR a primary source of information regarding profound levels of hearing loss.

MeSH terms

  • Auditory Perception*
  • Auditory Threshold / physiology*
  • Child, Preschool
  • Cochlear Implantation / methods*
  • Evoked Potentials, Auditory, Brain Stem / physiology*
  • Female
  • Hearing Loss / physiopathology
  • Hearing Loss / therapy*
  • Humans
  • Infant
  • Male
  • Treatment Outcome