A New Surgical Approach for Direct Acoustic Cochlear Implant: A Temporal Bone Study

Area of Science:

• Otolaryngology
• Neurosurgery
• Biomedical Engineering

Background:

• Direct acoustic cochlear implant (DACI) represents an advancement in implantable acoustic prostheses.
• Current surgical approaches for DACI are complex and time-consuming, involving mastoidectomy and posterior-inferior tympanotomy.
• A need exists for a more efficient surgical technique for DACI placement.

Purpose of the Study:

• To introduce and evaluate a novel, shorter surgical approach for direct acoustic cochlear implant (DACI) placement.
• To assess the feasibility and efficiency of the new surgical technique in temporal bone specimens.

Main Methods:

• A new surgical approach was developed, utilizing a superior-anterior tympanotomy to position an artificial incus above the oval window.
• The feasibility of this approach was tested by performing DACI placement in five human temporal bone specimens.

Main Results:

• The average surgical time for DACI placement using the new approach was 112 minutes (range: 94-142 minutes).
• The procedure demonstrated ease of access, minimal drilling, and low associated clinical risk.
• The novel approach significantly reduced the overall surgical duration compared to conventional methods.

Conclusions:

• The developed surgical approach simplifies the procedure for direct acoustic cochlear implant (DACI) placement.
• This simplified technique effectively reduces the time required for DACI implantation.
• The findings suggest a more efficient and potentially less invasive surgical option for DACI procedures.