Electromagnetic Transduction and Bone-Conduction Implants
Reinfeldt et al (2015) reported on six patients implanted with a new direct drive, active, transcutaneous bone-conduction implant (BCI) from Sweden. The device is a low-profile device and uses electromagnetic transduction across the skin—importantly not requiring a percutaneous abutment (screw attachment through the skin). The results indicated 10 to 41 dB improvement from 250 to 8000 Hz, improved SRT of 27 dB, and statistically significant APHAB improvements in 3 of 4 subscales.
Carr et al (2015) reported their results from 10 patients implanted with Cochlear Corp’s BAHA Attract (a magnetic transcutaneous, osseo-integrated bone-conduction device) between November 2013 and May 2014. The authors report that all of their patients were adults with single-sided deafness (SSD) or conductive-mixed hearing loss. They reported that “all patients had maximum bone-conduction thresholds of 30 dBHL for conductive or mixed hearing loss or 20 dBHL in the contralateral ear for SSD.” Carr et al report significant increases in the Glasgow Benefit Inventory (GB) and the Client Oriented Scale of Improvement (COSI) as compared to conventional hearing aids. However, they also report the improvement in word discrimination scores (WDS) was not significant at 30 and 50 dBA.
For More Information, References, and Recommendations
Carr SD, Moraleda J, Procter V, Wright K, Ray J. (2015) Initial UK Experience with a Novel Magnetic Transcutaneous Bone Conduction Device. Otology & Neurotology 36:1399-1402.
Reinfeldt S, Hakansson B, Taghavi H, Jansson K-JF, Eeg-Olofsson M. (2015) The Bone-Conduction Implant—Clinical Results of the First Six Patients. International Journal of Audiology 54:408-416.