A retrospective analysis of high resolution computed tomography in the assessment of cochlear implant patients

Nair, S. R.; Abou-Elhamd, KA; Hawthorne, Maurice

doi:10.1046/j.1365-2273.2000.00325.x

Cited by 45 publications

(23 citation statements)

References 26 publications

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“…Meningitis is one of the most common causes of acquired hearing loss in children and adults (Nadol, 1978;Nair et al, 2000). In our study meningitis was most commonly caused by Neisseria meningitidis and least commonly by Haemophilus infl uenzae.…”

Section: Discussionmentioning

confidence: 93%

Meningitis resulting in hearing loss and labyrinthitis ossificans - does the causative organism matter?

Douglas¹,

Sanli²,

Gibson³

2008

Cochlear Implants Int.

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Section: Discussionmentioning

confidence: 93%

Meningitis resulting in hearing loss and labyrinthitis ossificans - does the causative organism matter?

Douglas¹,

Sanli²,

Gibson³

2008

Cochlear Implants Int.

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“…In the study of Nikolopoulos et al (17), CT images showed a sensitivity of 62% and a specificity of 82% for the detection of cochlear ossification in a group of 44 children. HRCT findings in patients deafened by meningitis assessed by Nair et al (18) were reported to possess a sensitivity of 71% and a specificity of 100%.…”

Section: Discussionmentioning

confidence: 98%

Cochlear Osteoneogenesis After Meningitis in Cochlear Implant Patients

Ďurišin¹,

Bartling²,

Arnoldner³

et al. 2010

Otology &Amp; Neurotology

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Cochlear implants are the treatment of choice for auditory rehabilitation of patients with sensory deafness. They restore the missing function of Thomas Lenarz 1 inner hair cells by transforming the acoustic signal into electrical stimuli 1 Department of Otolaryngology, Head & Neck for activation of auditory nerve fibers. Due to the very fast technology development, cochlear implants provide open-set speech understanding Surgery, Hannover Medical School, Hannover, Germany in the majority of patients including the use of the telephone. Children can achieve a near to normal speech and language development provided their deafness is detected early after onset and implantation is performed quickly thereafter. The diagnostic procedure as well as the surgical technique have been standardized and can be adapted to the individual anatomical and physiological needs both in children and adults. Special cases such as cochlear obliteration might require special measures and re-implantation, which can be done in most cases in a straight forward way. Technology upgrades count for better performance. Future developments will focus on better electrode-nerve interfaces by improving electrode technology. An increased number of electrical contacts as well as the biological treatment with regeneration of the dendrites growing onto the electrode will increase the number of electrical channels. This will give room for improved speech coding strategies in order to create the bionic ear, i.e. to restore the process of natural hearing by means of technology. The robot-assisted surgery will allow for high precision surgery and reliable hearing preservation. Biological therapies will support the bionic ear. Methods are bio-hybrid electrodes, which are coded by stem cells transplanted into the inner ear to enhance auto-production of neurotrophins. Local drug delivery will focus on suppression of trauma reaction and local regeneration. Gene therapy by nanoparticles will hopefully lead to the preservation of residual hearing in patients being affected by genetic hearing loss. Overall the cochlear implant is a very powerful tool to rehabilitate patients with sensory deafness. More than 1 million of candidates in Germany today could benefit from this high technology auditory implant. Only 50,000 are implanted so far. In the future, the procedure can be done under local anesthesia, will be minimally invasive and straight forward. Hearing preservation will be routine.

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“…Previous studies have reported that the sensitivity of high resolution CT imaging in detect otosclerosis is between 71–78% (16,17). In a case series of nine patients, ossification of the round window was evident on imaging in 4/9 patients.…”

Section: Discussionmentioning

confidence: 99%

Adult Progressive Sensorineural Hearing Loss

Roberts

Bush

Jones

2014

Otology &Amp; Neurotology

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Objective Pre-operative evaluation of cochlear implant candidate includes routine imaging in order to identify anatomic abnormalities that may preclude or complicate implantation, such as cohlear aplasia, absent/narrowed internal audiotory canals, cochlear ossificans, or significant traumatic fracture. The aim of this study is to determine if preoperative imaging is necessary in select cochlear implant candidates thus defraying cost and ionizing radiation. Study Design Retrospective chart review. Setting Tertiary referral facility. Patients Adult patients with progressive sensorineural hearing loss without evidence of head trauma, meningitis, or congenital hearing loss who underwent cochlear implantation. Interventions Diagnostic and Therapeutic. Main Outcome Measures Pre operative radiologic abnormalities, deviation from standard cochlear implant operation. Results 118 cochlear implants met inclusion criteria. 23.7% of CT scans had a documented abnormality, including chronic otitis media (14.4%), otosclerosis (4.2%) and an enlarged vestibular aqueduct (3.4%). There were 6 eventful surgeries in patients with normal documented CT scan. Events included multiple insertion attempts (3.4%), CSF leak (2.5%) and no apparent round window (2.5%). In every case, a cochlear implant was able to be placed successfully. Conclusion In the appropriately selected patient, pre-operative imaging is not necessary as it does not impact the cochlear implant surgery and will defray cost and ionizing radiation

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A retrospective analysis of high resolution computed tomography in the assessment of cochlear implant patients

Cited by 45 publications

References 26 publications

Meningitis resulting in hearing loss and labyrinthitis ossificans - does the causative organism matter?

Meningitis resulting in hearing loss and labyrinthitis ossificans - does the causative organism matter?

Cochlear Osteoneogenesis After Meningitis in Cochlear Implant Patients

Adult Progressive Sensorineural Hearing Loss

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