Percutaneous Versus Transcutaneous Bone Conduction Implant System: A Feasibility Study on a Cadaver Head
2008 (English)In: Otology and Neurotology, ISSN 1531-7129, E-ISSN 1537-4505, Vol. 29, no 8, 1132-1139 p.Article in journal (Refereed) Published
Objective: Percutaneous bone-anchored hearing aid (BAHA) is an important rehabilitation alternative for patients who have conductive or mixed hearing loss. However, these devices use a percutaneous and bone-anchored implant that has some drawbacks reported. A transcutaneous bone conduction implant system (BCI) is proposed as an alternative to the percutaneous system because it leaves the skin intact. The BCI transmits the signal to a permanently implanted transducer with an induction loop system through the intact skin. The aim of this study was to compare the electroacoustic performance of the BAHA Classic-300 with a full-scale BCI on a cadaver head in a sound field. The BCI comprised the audio processor of the vibrant sound bridge connected to a balanced vibration transducer (balanced electromagnetic separation transducer).
Methods: Implants with snap abutments were placed in the parietal bone (Classic-300) and 15-mm deep in the temporal bone (BCI). The vibration responses at the ipsilateral and contralateral cochlear promontories were measured with a laser Doppler vibrometer, with the beam aimed through the ear canal.
Results: Results show that the BCI produces approximately 5 dB higher maximum output level and has a slightly lower distortion than the Classic-300 at the ipsilateral promontorium at speech frequencies. At the contralateral promontorium, the maximum output level was considerably lower for the BCI than for the Classic-300 except in the 1-2 kHz range, where it was similar.
Conclusion: Present results support the proposal that a BCI system can be a realistic alternative to a BAHA.
Place, publisher, year, edition, pages
2008. Vol. 29, no 8, 1132-1139 p.
Bone conduction, Hearing, Implant, Transcutaneous
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-16205DOI: 10.1097/MAO.0b013e31816fdc90OAI: oai:DiVA.org:liu-16205DiVA: diva2:133433