Predicted Gain and Functional Gain With Transcranial Routing of Signal Completely-in-the-Canal Hearing Aids

Fagelson, Marc A.; Noe, Colleen M.; Murnane, Owen D.; Blevins, Jennifer S.

doi:10.1044/1059-0889(2003/015)

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…22 This method is practically challenging given the requirement for a deep, close fitting of a powerful hearing aid without feedback. Protocols for both CROS aid fitting 20 and evaluation 21,23 are available. The degree of benefit of CROS may depend on the nature of difficulties experienced.…”

Section: Traditional Managementmentioning

confidence: 99%

The evidence base for the application of contralateral bone anchored hearing aids in acquired unilateral sensorineural hearing loss in adults

Baguley

Bird

Humphriss

et al. 2006

Clinical Otolaryngology

117

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. Acquired unilateral sensorineural hearing loss reduces the ability to localize sounds and to discriminate in background noise. . Four controlled trials attempt to determine the benefit of contralateral bone anchored hearing aids over contralateral routing of signal (CROS) hearing aids and over the unaided condition. All found no significant improvement in auditory localization with either aid. Speech discrimination in noise and subjective questionnaire measures of auditory abilities showed an advantage for bone anchored hearing aid (BAHA) > CROS > unaided conditions. . All four studies have material shortfalls: (i) the BAHA was always trialled after the CROS aid; (ii) CROS aids were only trialled for 4 weeks; (iii) none used any measure of hearing handicap when selecting subjects; (iv) two studies have a bias in terms of patient selection; (v) all studies were underpowered (vi) double reporting of patients occurred. . There is a paucity of evidence to support the efficacy of BAHA in the treatment of acquired unilateral sensorineural hearing loss. Clinicians should proceed with caution and perhaps await a larger randomized trial. . It is perhaps only appropriate to insert a BAHA peg at the time of vestibular schwanoma tumour excision in patients with good preoperative hearing, as their hearing handicap increases most.

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Section: Traditional Managementmentioning

confidence: 99%

The evidence base for the application of contralateral bone anchored hearing aids in acquired unilateral sensorineural hearing loss in adults

Baguley

Bird

Humphriss

et al. 2006

Clinical Otolaryngology

117

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“…Hayes and Chen [16] also reported on the CIC device, but their study group only comprised three cases. As far as we know, little attention has been paid to this type of transcranial CROS method, since then [14, 17]. …”

Section: Introductionmentioning

confidence: 99%

Pilot study on the effectiveness of the conventional CROS, the transcranial CROS and the BAHA transcranial CROS in adults with unilateral inner ear deafness

Hol

Kunst

Snik

et al. 2009

Eur Arch Otorhinolaryngol

101

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The objective of the present pilot study is to evaluate the effectiveness of three conventional contralateral routing of sound (CROS) hearing aids in adults with unilateral inner ear deafness. The study included tertiary referral center. Ten patients with unilateral inner ear deafness and normal hearing in the contralateral ear were selected to evaluate three different methods of amplification: the CROS hearing aid, the completely in the canal hearing aid and the bone-anchored hearing aid CROS (BAHA). Each of the three hearing aids was tried in a random order for a period of 8 weeks. Audiometric performance, including speech-in-noise, directional hearing and subjective benefit were measured after each trial period, using the APHAB, SSQ and single-sided deafness questionnaire. Sound localization performance was essentially at chance level in all four conditions. Mixed results were seen on the other patient outcome measures that alternated in favor of one of the three CROS devices. After the trial, three patients chose to be fitted with the BAHA CROS and one with the conventional CROS. In conclusion, most of the patients experienced some degree of benefit with each of the three hearing aids. Preference for one of the three hearing aids was independent of the order in which they were tried. It would be worthwhile to formulate selection criteria; still, we recommend that all patients with unilateral inner ear deafness should be offered a trial with at least the BAHA CROS.

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“…An alternative approach to providing contralateral routing of sound than with conventional CROS and BICROS hearing aid systems is with a so‐called transcranial CROS hearing aid, most commonly referred to as t‐CROS. It is argued that the t‐CROS stimulates the contralateral cochlea via bone conduction 10, 11. This device can be regarded as somewhat experimental, as there seems to be some variability in patient outcome 12, 13.…”

Section: Introductionmentioning

confidence: 99%

The current status of audiologic rehabilitation for profound unilateral sensorineural hearing loss

Bishop

Eby

2009

The Laryngoscope

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There is indication in the literature that BAHA provides greater relief of hearing handicap associated with USNHL than CROS hearing aids; however, both have been found to provide limited patient satisfaction and seemingly fall short of restoring true sound localization. Adequate trials have not been performed comparing BAHA with the best CROS hearing aid technology. Transcranial hearing aids and cochlear implants are experimental methods to treat USNHL and hold promise, although there remains a lack of studies available to fully support this.

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Predicted Gain and Functional Gain With Transcranial Routing of Signal Completely-in-the-Canal Hearing Aids

Cited by 4 publications

References 7 publications

The evidence base for the application of contralateral bone anchored hearing aids in acquired unilateral sensorineural hearing loss in adults

The evidence base for the application of contralateral bone anchored hearing aids in acquired unilateral sensorineural hearing loss in adults

Pilot study on the effectiveness of the conventional CROS, the transcranial CROS and the BAHA transcranial CROS in adults with unilateral inner ear deafness

The current status of audiologic rehabilitation for profound unilateral sensorineural hearing loss

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