Hearing preservation in cochlear implantation for electric acoustic stimulation

Gstœttner, Wolfgang; Kiefer, Jan; Baumgartner, Wolf Dieter; Pok, Stefan Marcel; Peters, Silke; Adunka, Oliver F.

doi:10.1080/00016480410016432

Cited by 253 publications

(223 citation statements)

References 7 publications

Supporting

Mentioning

199

Contrasting

Unclassified

Order By: Relevance

“…The electriconly score was 23%, again suggesting a strong synergistic effect for this patient. Gstoettner et al (2004) reported speech results for one patient implanted with a 22mm electrode who improved from 38%-recognition of monosyllables in the acoustic-only mode to 90% with the addition of electric stimulation. Kiefer et al (2005) reported monosyllabic word understanding a group of 11 patients with preserved residual hearing.…”

Section: A+e Results For Speech Presented In Quietmentioning

confidence: 99%

“…When those three subjects were compared to a group of long-electrode patients (whose speech scores in quiet were matched to the Hybrid subjects), a significant advantage was observed. Gstoettner et al (2004) reported results from one A+E patient tested on sentence recognition in noise. Performance was best for the A+E condition, as compared to either the acoustic-alone or electric-alone condition.…”

Section: A+e Results For Speech Presented In Quietmentioning

confidence: 99%

“…Gstoettner et al (2004) described full or at least partial preservation of hearing in 18 of 21 patients using this technique. Kiefer et al (2005) reported that at least partial preservation of hearing was accomplished in 11 out of 13 patients.…”

Section: Preservation Of Hearing Following Cochlear Implant Surgerymentioning

confidence: 98%

See 2 more Smart Citations

Combined acoustic and electric hearing: Preserving residual acoustic hearing

2008

View full text Add to dashboard Cite

The topic of this review is the strategy of preserving residual acoustic hearing in the implanted ear to provide combined electrical stimulation and acoustic hearing as a rehabilitative strategy for sensorineural hearing loss. This chapter will concentrate on research done with the Iowa/Nucleus 10mm Hybrid device, but we will also attempt to summarize strategies and results from other groups around the world who use slightly different approaches. A number of studies have shown that preserving residual acoustic hearing in the implanted ear is a realistic goal for many patients with severe high-frequency hearing loss. The addition of the electric stimulation to their existing acoustic hearing can provide increased speech recognition for these patients. In addition, the preserved acoustic hearing can offer considerable advantages, as compared to a traditional cochlear implant, for tasks such as speech recognition in backgrounds or appreciation of music and other situations where the poor frequency resolution of electric stimulation has been a disadvantage.

show abstract

Section: A+e Results For Speech Presented In Quietmentioning

confidence: 99%

Section: A+e Results For Speech Presented In Quietmentioning

confidence: 99%

See 1 more Smart Citation

Combined acoustic and electric hearing: Preserving residual acoustic hearing

2008

View full text Add to dashboard Cite

show abstract

“…(This ability is nonexistent or almost nil with a unilateral implant, as noted before.) Combined EAS also provides a substantial benefit for listening to speech in quiet, in noise, in competition with another talker, or in competition with a multi-talker babble, compared with either electric stimulation only or acoustic stimulation only (e.g., von Ilberg et al, 1999;Kiefer et al, 2002Kiefer et al, , 2005Gantz and Turner, 2003;Wilson et al, 2003;Gstoettner et al, 2004Gstoettner et al, , 2006Gantz et al, 2005Gantz et al, , 2006Kong et al, 2005;James et al, 2006;Gifford et al, 2007;Dorman et al, 2007;Turner et al, this issue). Indeed, in some cases the score for combined EAS is greater than the sum of the scores for the electric-only and acoustic-only conditions.…”

Section: Two Recent Advancesmentioning

confidence: 99%

“…Indeed, in some cases the score for combined EAS is greater than the sum of the scores for the electric-only and acoustic-only conditions. This has been described as a synergistic effect (e.g., Gstoettner et al, 2004;Wilson et al, 2003). In addition, identification of melodies and reception of musical sounds is greatly improved with combined EAS compared to electric stimulation alone (Gantz et al, 2005;Kong et al, 2005;Gfeller et al, 2006 andGstoettner et al, 2006;Dorman et al, 2007).…”

Section: Two Recent Advancesmentioning

confidence: 99%

Cochlear implants: A remarkable past and a brilliant future

2008

View full text Add to dashboard Cite

The aims of this paper are to (i) provide a brief history of cochlear implants; (ii) present a status report on the current state of implant engineering and the levels of speech understanding enabled by that engineering; (iii) describe limitations of current signal processing strategies and (iv) suggest new directions for research. With current technology the "average" implant patient, when listening to predictable conversations in quiet, is able to communicate with relative ease. However, in an environment typical of a workplace the average patient has a great deal of difficulty. Patients who are "above average" in terms of speech understanding, can achieve 100% correct scores on the most difficult tests of speech understanding in quiet but also have significant difficulty when signals are presented in noise. The major factors in these outcomes appear to be (i) a loss of low-frequency, fine structure information possibly due to the envelope extraction algorithms common to cochlear implant signal processing; (ii) a limitation in the number of effective channels of stimulation due to overlap in electric fields from electrodes, and (iii) central processing deficits, especially for patients with poor speech understanding. Two recent developments, bilateral implants and combined electric and acoustic stimulation, have promise to remediate some of the difficulties experienced by patients in noise and to reinstate low-frequency fine structure information. If other possibilities are realized, e.g., electrodes that emit drugs to inhibit cell death following trauma and to induce the growth of neurites toward electrodes, then the future is very bright indeed.

show abstract

Predicting Basal Cochlear Length for Electric-Acoustic Stimulation

Adunka¹,

Unkelbach²,

Mack³

et al. 2005

Arch Otolaryngol Head Neck Surg

Self Cite

View full text Add to dashboard Cite

To assess the feasibility and accuracy of predicting electrode insertion depth necessary in cochlear implantations for electric-acoustic stimulation by means of preoperative high-resolution computed tomography (HRCT). Design: Human temporal bone study with evaluation of cochlear dimensions. Setting: Tertiary care medical center. Methods: Eight fresh human temporal bones were scanned, and basal cochlear structures were reconstructed and measured. Standard cochlear implantations with a free-fitting array were performed, and the bones then underwent histologic analysis using a technique that allows sectioning of undecalcified bones. After embedding, all bones underwent conventional radiologic analysis with further insertion measurements. Preimplantation HRCT data were compared with radiologic and histologic data. Results: Preimplantation HRCT-based measurements correlated very well with postimplantation radiologic data. A mean failure of 0.3 mm was found. Mean values for the first 360°ranged from 18.8 to 22.0 mm. Conclusions: Preimplantation HRCT-based prediction of cochlear implant insertion depths is both feasible and accurate. It is especially useful when aiming for hearing preservation, where insertion depths of 360°are necessary.

show abstract

Hearing preservation in cochlear implantation for electric acoustic stimulation

Abstract: Preservation of low-frequency hearing in cochlear implantation is possible in patients implanted because of profound high-frequency deafness. With the development of new, more atraumatic electrode designs, preservation of residual hearing should be further improved.

Cited by 253 publications

References 7 publications

Combined acoustic and electric hearing: Preserving residual acoustic hearing

Combined acoustic and electric hearing: Preserving residual acoustic hearing

Cochlear implants: A remarkable past and a brilliant future

Predicting Basal Cochlear Length for Electric-Acoustic Stimulation

Contact Info

Product

Resources

About