Vibrant Soundbridge for hearing restoration after chronic ear surgery

Area of Science:

• Otolaryngology
• Audiology
• Biomedical Engineering

Background:

• Middle ear surgery for chronic otitis media (COM) or cholesteatoma can lead to severe mixed hearing loss.
• Anatomical changes post-surgery often hinder effective hearing aid use.
• Middle ear implants offer an alternative for auditory rehabilitation in such cases.

Purpose of the Study:

• To evaluate the effectiveness of the MED-EL Vibrant Soundbridge (VSB) system.
• To assess VSB implantation in patients with severe conductive and mixed hearing loss.
• To analyze outcomes after middle ear surgery for cholesteatoma or COM.

Main Methods:

• A 2-year study involving 40 patients (age 35-81) implanted with the VSB system.
• Patients had a history of 1-5 previous middle ear surgeries for COM or cholesteatoma.
• Audiological assessments included bone conduction, aided thresholds, and speech recognition at 1, 6, and 9 months post-surgery.

Main Results:

• Post-operative bone conduction showed no significant hearing changes.
• Unaided hearing thresholds averaged 82.38 dB SPL (PTA4) with an SRT of 94.28 dB SPL.
• Aided thresholds improved significantly, with PTA4 at 47.89 dB SPL and SRT at 53.33 dB SPL after 6-9 months.

Conclusions:

• VSB implantation shows promising results for auditory rehabilitation in severe mixed hearing loss post-cholesteatoma surgery.
• Patient outcomes improved over the observation period.
• Further research is needed to confirm long-term stability of VSB results.