TY - JOUR
T1 - Systematic Literature Review of Hearing Preservation Rates in Cochlear Implantation Associated With Medium- and Longer-Length Flexible Lateral Wall Electrode Arrays
AU - Van de Heyning, Paul H.
AU - Dazert, Stefan
AU - Gavilan, Javier
AU - Lassaletta, Luis
AU - Lorens, Artur
AU - Rajan, Gunesh P.
AU - Skarzynski, Henryk
AU - Skarzynski, Piotr H.
AU - Tavora-Vieira, Dayse
AU - Topsakal, Vedat
AU - Usami, Shin Ichi
AU - Van Rompaey, Vincent
AU - Weiss, Nora M.
AU - Polak, Marek
N1 - Funding Information:
The authors kindly acknowledge Dr. Anandhan Dhanasingh for technical support and Una Doyle for English proofreading on a version of this manuscript. The authors thank Dr. Edwin Wappl-Kornherr for the statistical evaluation.
Publisher Copyright:
Copyright © 2022 Van de Heyning, Dazert, Gavilan, Lassaletta, Lorens, Rajan, Skarzynski, Skarzynski, Tavora-Vieira, Topsakal, Usami, Van Rompaey, Weiss and Polak.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - Background: The last two decades have demonstrated that preoperative functional acoustic hearing (residual hearing) can be preserved during cochlear implant (CI) surgery. However, the relationship between the electrode array length and postoperative hearing preservation (HP) with lateral wall flexible electrode variants is still under debate. Aims/Objectives: This is a systematic literature review that aims to analyze the HP rates of patients with residual hearing for medium-length and longer-length lateral wall electrodes. Method: A systematic literature review methodology was applied following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) recommendations to evaluate the HP rates of medium-length and longer-length lateral wall electrodes from one CI manufacturer (medium length FLEX 24, longer length FLEX 28 and FLEX SOFT, MED-EL, Innsbruck, Austria). A search using search engine PubMed (https://www.ncbi.nlm.nih.gov/pubmed/) was performed using the search terms “hearing preservation” or “residual hearing” and “cochlear implant” in “All fields.” Articles published only in English between January 01, 2009 and December 31, 2020 were included in the search. Results: The HP rate was similar between medium-length (93.4%–93.5%) and longer (92.1%–86.8%) electrodes at 4 months (p = 0.689) and 12 months (p = 0.219). In the medium-length electrode group, patients under the age of 45 years had better HP than patients above the age of 45 years. Conclusions: Both medium-length and longer electrode arrays showed high hearing preservation rates. Considering the hearing deterioration over time, implanting a longer electrode at primary surgery should be considered, thus preventing the need for future reimplantation.
AB - Background: The last two decades have demonstrated that preoperative functional acoustic hearing (residual hearing) can be preserved during cochlear implant (CI) surgery. However, the relationship between the electrode array length and postoperative hearing preservation (HP) with lateral wall flexible electrode variants is still under debate. Aims/Objectives: This is a systematic literature review that aims to analyze the HP rates of patients with residual hearing for medium-length and longer-length lateral wall electrodes. Method: A systematic literature review methodology was applied following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) recommendations to evaluate the HP rates of medium-length and longer-length lateral wall electrodes from one CI manufacturer (medium length FLEX 24, longer length FLEX 28 and FLEX SOFT, MED-EL, Innsbruck, Austria). A search using search engine PubMed (https://www.ncbi.nlm.nih.gov/pubmed/) was performed using the search terms “hearing preservation” or “residual hearing” and “cochlear implant” in “All fields.” Articles published only in English between January 01, 2009 and December 31, 2020 were included in the search. Results: The HP rate was similar between medium-length (93.4%–93.5%) and longer (92.1%–86.8%) electrodes at 4 months (p = 0.689) and 12 months (p = 0.219). In the medium-length electrode group, patients under the age of 45 years had better HP than patients above the age of 45 years. Conclusions: Both medium-length and longer electrode arrays showed high hearing preservation rates. Considering the hearing deterioration over time, implanting a longer electrode at primary surgery should be considered, thus preventing the need for future reimplantation.
KW - electric-acoustic stimulation
KW - electrode length
KW - flex 24
KW - flex 28
KW - flexSoft
KW - hearing preservation cochlear implantation
UR - http://www.scopus.com/inward/record.url?scp=85134273447&partnerID=8YFLogxK
U2 - 10.3389/fsurg.2022.893839
DO - 10.3389/fsurg.2022.893839
M3 - Review article
C2 - 36034377
AN - SCOPUS:85134273447
SN - 2296-875X
VL - 9
JO - Frontiers in Surgery
JF - Frontiers in Surgery
M1 - 893839
ER -