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Int Arch Otorhinolaryngol 2014; 18(04): 362-368
DOI: 10.1055/s-0034-1372510
Original Research
Thieme Publicações Ltda Rio de Janeiro, Brazil

Longitudinal Analysis of the Absence of Intraoperative Neural Response Telemetry in Children using Cochlear Implants

Amanda Christina Gomes de Moura
1   ENT Department, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
,
Maria Valéria Schmidt Goffi-Gomez
1   ENT Department, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
,
Maria Ines Vieira Couto
2   Physical Therapy, Speech, Occupational Therapy Department Faculdade de Medicina da Universidade de São Paulo, Universidade de São Paulo, São Paulo, Brazil
,
Rubens Brito
1   ENT Department, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
,
Robinson Koji Tsuji
1   ENT Department, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
,
Debora Maria Befi-Lopes
2   Physical Therapy, Speech, Occupational Therapy Department Faculdade de Medicina da Universidade de São Paulo, Universidade de São Paulo, São Paulo, Brazil
,
Carla Gentile Matas
2   Physical Therapy, Speech, Occupational Therapy Department Faculdade de Medicina da Universidade de São Paulo, Universidade de São Paulo, São Paulo, Brazil
,
Ricardo Ferreira Bento
1   ENT Department, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
› Author Affiliations
Further Information

Publication History

21 January 2014

10 February 2014

Publication Date:
17 July 2014 (online)

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Abstract

Introduction Currently the cochlear implant allows access to sounds in individuals with profound hearing loss. The objective methods used to verify the integrity of the cochlear device and the electrophysiologic response of users have noted these improvements.

Objective To establish whether the evoked compound action potential of the auditory nerve can appear after electrical stimulation when it is absent intraoperatively.

Methods The clinical records of children implanted with the Nucleus Freedom (Cochlear Ltd., Australia) (CI24RE) cochlear implant between January 2009 and January 2010 with at least 6 months of use were evaluated. The neural response telemetry (NRT) thresholds of electrodes 1, 6, 11, 16, and 22 during surgery and after at least 3 months of implant use were analyzed and correlated with etiology, length of auditory deprivation, and chronological age. These data were compared between a group of children exhibiting responses in all of the tested electrodes and a group of children who had at least one absent response.

Results The sample was composed of clinical records of 51 children. From these, 21% (11) showed no NRT in at least one of the tested electrodes. After an average of 4.9 months of stimulation, the number of individuals exhibiting absent responses decreased from 21 to 11% (n = 6).

Conclusion It is feasible that absent responses present after a period of electrical stimulation. In our sample, 45% (n = 5) of the patients with intraoperative absence exhibited a positive response after an average of 4.9 months of continued electrical stimulation.

Keywords

cochlear implants - neural response telemetry - children
 

  • References

  • 1 Ferrari DV, Sameshima K, Costa Filho OA, Bevilacqua MC. A telemetria de respostas neurais no sistema de implante coclear multicanal nucleus 24: revisão da literatura. Rev Bras Otorrinolaringol 2004; 70 (1) 112-118
    CrossrefSearch in Google Scholar
  • 2 Abbas PJ, Brown CJ, Shallop JK , et al. Summary of results using the nucleus CI24M implant to record the electrically evoked compound action potential. Ear Hear 1999; 20 (1) 45-59
    CrossrefPubMedSearch in Google Scholar
  • 3 Guedes MC, Brito Neto RV, Goffi-Gomez MVS , et al. Telemetria de resposta neural intra-operatória em usuários de implante coclear. Rev Bras Otorrinolaringol 2005; 71 (5) 660-667
    CrossrefSearch in Google Scholar
  • 4 Shallop JK, Facer GW, Peterson A. Neural response telemetry with the nucleus CI24M cochlear implant. Laryngoscope 1999; 109 (11) 1755-1759
    CrossrefPubMedSearch in Google Scholar
  • 5 Gantz BJ, Brown CJ, Abbas PJ. Intraoperative measures of electrically evoked auditory nerve compound action potential. Am J Otol 1994; 15 (2) 137-144
    Search in Google Scholar
  • 6 Blamey P. Are spiral ganglion cell numbers important for speech perception with a cochlear implant?. Am J Otol 1997; 18 (6, Suppl): S11-S12
    Search in Google Scholar
  • 7 Abbas PJ, Brown CJ. Electrophysiology and device telemetry. In: Waltzman SB, Cohen NL, , eds. Cochlear Implants. New York, NY: Thieme; 2000: 121-138
    Search in Google Scholar
  • 8 Tanamati LF, Bevilacqua MC, Costa OA. Avaliação longitudinal do ECAP registrado em crianças usuárias de implante coclear. Rev Bras Otorrinolaringol 2009; 75 (1) 90-98
    CrossrefSearch in Google Scholar
  • 9 Cafarelli Dees D, Dillier N, Lai WK , et al. Normative findings of electrically evoked compound action potential measurements using the neural response telemetry of the Nucleus CI24M cochlear implant system. Audiol Neurootol 2005; 10 (2) 105-116
    CrossrefPubMedSearch in Google Scholar
  • 10 van Dijk B, Botros AM, Battmer RD , et al. Clinical results of AutoNRT, a completely automatic ECAP recording system for cochlear implants. Ear Hear 2007; 28 (4) 558-570
    CrossrefPubMedSearch in Google Scholar
  • 11 Guedes MC, Weber R, Goffi-Gomez MVS, Brito Neto RV, Peralta CGO, Bento RF. Efeitos do potencial de ação neural sobre a percepção de fala em usuários de implante coclear. Rev Bras Otorrinolaringol 2007; 73 (4) 439-445
    CrossrefSearch in Google Scholar
  • 12 Brown CJ. Clinical uses of electrically evoked auditory nerve and brainstem responses. Curr Opin Otolaryngol Head Neck Surg 2003; 11 (5) 383-387
    CrossrefSearch in Google Scholar
  • 13 Roehm PC, Hansen MR. Strategies to preserve or regenerate spiral ganglion neurons. Curr Opin Otolaryngol Head Neck Surg 2005; 13 (5) 294-300
    CrossrefSearch in Google Scholar
  • 14 Shepherd RK, Hardie NA. Deafness-induced changes in the auditory pathway: implications for cochlear implants. Audiol Neurootol 2001; 6 (6) 305-318
    CrossrefSearch in Google Scholar
  • 15 Gordon KA, Papsin BC, Harrison RV. Activity-dependent developmental plasticity of the auditory brain stem in children who use cochlear implants. Ear Hear 2003; 24 (6) 485-500
    CrossrefPubMedSearch in Google Scholar
  • 16 Gordon KA, Ebinger KA, Gilden JE, Shapiro WH. Neural response telemetry in 12- to 24-month-old children. Ann Otol Rhinol Laryngol Suppl 2002; 189 (189) 42-48
    PubMedSearch in Google Scholar
  • 17 Hughes ML, Brown CJ, Abbas PJ, Wolaver AA, Gervais JP. Comparison of EAP thresholds with MAP levels in the nucleus 24 cochlear implant: data from children. Ear Hear 2000; 21 (2) 164-174
    CrossrefPubMedSearch in Google Scholar
  • 18 Smoorenburg GF, Willeboer C, van Dijk JE. Speech perception in nucleus CI24M cochlear implant users with processor settings based on electrically evoked compound action potential thresholds. Audiol Neurootol 2002; 7 (6) 335-347
    CrossrefSearch in Google Scholar
  • 19 Tsuji RK, Goffi-Gomez MVS, Peralta CO , et al. Neural response thresholds in the Nucleus Contour cochlear implant before and after stylet removal. Acta Otolaryngol 2009; 129 (11) 1330-1336
    CrossrefSearch in Google Scholar
  • 20 Franck KH, Norton SJ. Estimation of psychophysical levels using the electrically evoked compound action potential measured with the neural response telemetry capabilities of Cochlear Corporation's CI24M device. Ear Hear 2001; 22 (4) 289-299
    CrossrefPubMedSearch in Google Scholar