Cochlear implantation in patients with bilateral cochlear trauma

Area of Science:

• Otolaryngology
• Neurosurgery
• Audiology

Background:

• Temporal bone fractures involving the otic capsule can cause complete auditory and vestibular dysfunction.
• Cochlear trauma, even without fracture, may lead to profound sensorineural hearing loss.
• Cochlear implantation is a viable option for hearing restoration in cases of cochlear trauma with an intact auditory nerve.

Observation:

• A retrospective review of 5 postlingually deafened patients with cochlear trauma who underwent cochlear implantation between 2001 and 2006.
• Preoperative and postoperative hearing performance data were collected and analyzed.
• Surgical considerations included potential anatomical irregularities, fibrosis, and ossification within the cochlea.

Findings:

• All implanted patients achieved excellent outcomes, including open-set speech understanding.
• Patients successfully utilized telephones for communication post-implantation.
• Speech understanding performance was comparable to that of standard postlingual adult cochlear implant recipients.

Implications:

• Cochlear implantation is an effective aural rehabilitation strategy for profound hearing loss resulting from temporal bone trauma.
• Preoperative imaging (CT, MRI) and promontory stimulation are crucial for surgical planning and determining the implantation side.
• While surgery can be complex due to anatomical variations and cochlear changes, successful outcomes are achievable.