Limits...
The bone conduction implant: Clinical results of the first six patients.

Reinfeldt S, Håkansson B, Taghavi H, Fredén Jansson KJ, Eeg-Olofsson M - Int J Audiol (2015)

Bottom Line: The surgical procedure was found uneventful with no adverse events.All BCI results were better than, or similar to the reference device results, and the APHAB and GBI questionnaires scores showed statistically significant improvements versus the unaided situation, supporting the second and third hypotheses.The BCI provides significant hearing rehabilitation for patients with mild-to-moderate conductive or mixed hearing impairments, and can be easily and safely implanted under intact skin.

View Article: PubMed Central - PubMed

Affiliation: * Department of Signals and Systems, Chalmers University of Technology , Gothenburg , Sweden.

ABSTRACT

Objective: To investigate audiological and quality of life outcomes for a new active transcutaneous device, called the bone conduction implant (BCI), where the transducer is implanted under intact skin.

Design: A clinical study with sound field audiometry and questionnaires at six-month follow-up was conducted with a bone-anchored hearing aid on a softband as reference device.

Study sample: Six patients (age 18-67 years) with mild-to-moderate conductive or mixed hearing loss.

Results: The surgical procedure was found uneventful with no adverse events. The first hypothesis that BCI had a statistically significant improvement over the unaided condition was proven by a pure-tone-average improvement of 31.0 dB, a speech recognition threshold improvement in quiet (27.0 dB), and a speech recognition score improvement in noise (51.2 %). At speech levels, the signal-to-noise ratio threshold for BCI was - 5.5 dB. All BCI results were better than, or similar to the reference device results, and the APHAB and GBI questionnaires scores showed statistically significant improvements versus the unaided situation, supporting the second and third hypotheses.

Conclusions: The BCI provides significant hearing rehabilitation for patients with mild-to-moderate conductive or mixed hearing impairments, and can be easily and safely implanted under intact skin.

No MeSH data available.


Related in: MedlinePlus

Signal-to-noise ratio threshold (SNR-threshold) for 50% intelligibility for the BCI, and the reference device for all patients, mean improvement, and standard deviation. BCI SRT-threshold = − 5.5 ± 2.3 dB, and Ref SRT-threshold = − 2.4 ± 3.8 dB.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4487578&req=5

Figure 0004: Signal-to-noise ratio threshold (SNR-threshold) for 50% intelligibility for the BCI, and the reference device for all patients, mean improvement, and standard deviation. BCI SRT-threshold = − 5.5 ± 2.3 dB, and Ref SRT-threshold = − 2.4 ± 3.8 dB.

Mentions: Figure 4 shows the SNR-thresholds using the BCI and the reference device. Increasing negative SNR-thresholds means that the patient reaches the same speech intelligibility with a higher noise level. As can be seen in the figure, the BCI shows better or similar results compared to the reference device for all patients; however, it was not statistically different according to the Wilcoxon signed rank test. On average the BCI gave a SNR-threshold of −5.5 ±2.3 dB, while the reference device gave an average SNR-threshold of −2.4±3.8 dB. It should be noted that in the unaided condition, the speech level of 63 dB SPL was too low and no patient reached 50% speech intelligibility even without noise.


The bone conduction implant: Clinical results of the first six patients.

Reinfeldt S, Håkansson B, Taghavi H, Fredén Jansson KJ, Eeg-Olofsson M - Int J Audiol (2015)

Signal-to-noise ratio threshold (SNR-threshold) for 50% intelligibility for the BCI, and the reference device for all patients, mean improvement, and standard deviation. BCI SRT-threshold = − 5.5 ± 2.3 dB, and Ref SRT-threshold = − 2.4 ± 3.8 dB.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4487578&req=5

Figure 0004: Signal-to-noise ratio threshold (SNR-threshold) for 50% intelligibility for the BCI, and the reference device for all patients, mean improvement, and standard deviation. BCI SRT-threshold = − 5.5 ± 2.3 dB, and Ref SRT-threshold = − 2.4 ± 3.8 dB.
Mentions: Figure 4 shows the SNR-thresholds using the BCI and the reference device. Increasing negative SNR-thresholds means that the patient reaches the same speech intelligibility with a higher noise level. As can be seen in the figure, the BCI shows better or similar results compared to the reference device for all patients; however, it was not statistically different according to the Wilcoxon signed rank test. On average the BCI gave a SNR-threshold of −5.5 ±2.3 dB, while the reference device gave an average SNR-threshold of −2.4±3.8 dB. It should be noted that in the unaided condition, the speech level of 63 dB SPL was too low and no patient reached 50% speech intelligibility even without noise.

Bottom Line: The surgical procedure was found uneventful with no adverse events.All BCI results were better than, or similar to the reference device results, and the APHAB and GBI questionnaires scores showed statistically significant improvements versus the unaided situation, supporting the second and third hypotheses.The BCI provides significant hearing rehabilitation for patients with mild-to-moderate conductive or mixed hearing impairments, and can be easily and safely implanted under intact skin.

View Article: PubMed Central - PubMed

Affiliation: * Department of Signals and Systems, Chalmers University of Technology , Gothenburg , Sweden.

ABSTRACT

Objective: To investigate audiological and quality of life outcomes for a new active transcutaneous device, called the bone conduction implant (BCI), where the transducer is implanted under intact skin.

Design: A clinical study with sound field audiometry and questionnaires at six-month follow-up was conducted with a bone-anchored hearing aid on a softband as reference device.

Study sample: Six patients (age 18-67 years) with mild-to-moderate conductive or mixed hearing loss.

Results: The surgical procedure was found uneventful with no adverse events. The first hypothesis that BCI had a statistically significant improvement over the unaided condition was proven by a pure-tone-average improvement of 31.0 dB, a speech recognition threshold improvement in quiet (27.0 dB), and a speech recognition score improvement in noise (51.2 %). At speech levels, the signal-to-noise ratio threshold for BCI was - 5.5 dB. All BCI results were better than, or similar to the reference device results, and the APHAB and GBI questionnaires scores showed statistically significant improvements versus the unaided situation, supporting the second and third hypotheses.

Conclusions: The BCI provides significant hearing rehabilitation for patients with mild-to-moderate conductive or mixed hearing impairments, and can be easily and safely implanted under intact skin.

No MeSH data available.


Related in: MedlinePlus