Assessing Hearing Performance Based on Cochlear Implant Position

Location

Medical Education Building, LSUHSC-NO

Presentation Date

10-10-2019 10:00 AM

End Date

10-10-2019 12:00 PM

Description

Cochlear implants are auditory protheses used to artificially stimulate the neurons of the inner ear in cases of severe to profound deafness. An electrode is inserted into the scala tympani following a cochleostomy. The insertion type of the electrode is determined prior to surgery and is limited to either the perimodiolar insertion method or the lateral wall insertion method. The stiffer, precurved perimodiolar electrode arrays are located closer to the spiral nerve endings in the organ of Corti though increase the risk of basilar membrane perforation during insertion. The flexible lateral wall electrode arrays provide for a less traumatic entry yet lie further from the spiral nerve endings leading to stimulatory frequency overlap. It was thus desirable for us to review which cochlear implant array benefitted patients in our system. A review proceeded of patients who had received either perimodiolar and lateral wall cochlear implantation at Our Lady of the Lake Hospital. Patients were selected using exclusion criteria to remove patients without full audiology data available and patients without surgical record of implantation. Patient Sound Recognition Test (SRT, dB) and Word Recognition Score (WRS, %) were used as metrics to evaluate pre- and post-operative hearing levels in patients. Analysis of the data includes tracking patients over 1-year of post-operative therapy and comparison of improvement seen in the perimodiolar and lateral wall implants. The analysis will show whether treatment of severe to profound hearing loss with the perimodiolar or lateral wall cochlear implant better improves sound and word recognition in our patients. This will help clinical decision making in referring patients to either one of the available models.

Comments

Mentor: Moises Arriaga, MD (LSUHSC, Children’s Hospital, Our Lady of the Lake Hospital)

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Oct 10th, 10:00 AM Oct 10th, 12:00 PM

Assessing Hearing Performance Based on Cochlear Implant Position

Medical Education Building, LSUHSC-NO

Cochlear implants are auditory protheses used to artificially stimulate the neurons of the inner ear in cases of severe to profound deafness. An electrode is inserted into the scala tympani following a cochleostomy. The insertion type of the electrode is determined prior to surgery and is limited to either the perimodiolar insertion method or the lateral wall insertion method. The stiffer, precurved perimodiolar electrode arrays are located closer to the spiral nerve endings in the organ of Corti though increase the risk of basilar membrane perforation during insertion. The flexible lateral wall electrode arrays provide for a less traumatic entry yet lie further from the spiral nerve endings leading to stimulatory frequency overlap. It was thus desirable for us to review which cochlear implant array benefitted patients in our system. A review proceeded of patients who had received either perimodiolar and lateral wall cochlear implantation at Our Lady of the Lake Hospital. Patients were selected using exclusion criteria to remove patients without full audiology data available and patients without surgical record of implantation. Patient Sound Recognition Test (SRT, dB) and Word Recognition Score (WRS, %) were used as metrics to evaluate pre- and post-operative hearing levels in patients. Analysis of the data includes tracking patients over 1-year of post-operative therapy and comparison of improvement seen in the perimodiolar and lateral wall implants. The analysis will show whether treatment of severe to profound hearing loss with the perimodiolar or lateral wall cochlear implant better improves sound and word recognition in our patients. This will help clinical decision making in referring patients to either one of the available models.