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Morphologic Analysis of the Scala Tympani Using Synchrotron: Implications for Cochlear Implantation.
Micuda, Ashley; Li, Hao; Rask-Andersen, Helge; Ladak, Hanif M; Agrawal, Sumit K.
Afiliação
  • Micuda A; Department of Medical Biophysics, Western University, London, Ontario, Canada.
  • Li H; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden.
  • Rask-Andersen H; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden.
  • Ladak HM; Department of Medical Biophysics, Western University, London, Ontario, Canada.
  • Agrawal SK; School of Biomedical Engineering, Western University, London, Ontario, Canada.
Laryngoscope ; 134(6): 2889-2897, 2024 Jun.
Article em En | MEDLINE | ID: mdl-38189807
ABSTRACT

OBJECTIVES:

To use synchrotron radiation phase-contrast imaging (SR-PCI) to visualize and measure the morphology of the entire cochlear scala tympani (ST) and assess cochlear implant (CI) electrode trajectories.

METHODS:

SR-PCI images were used to obtain geometric measurements of the cochlear scalar diameter and area at 5-degree increments in 35 unimplanted and three implanted fixed human cadaveric cochleae.

RESULTS:

The cross-sectional diameter and area of the cochlea were found to decrease from the base to the apex. This study represents a wide variability in cochlear morphology and suggests that even in the smallest cochlea, the ST can accommodate a 0.4 mm diameter electrode up to 720°. Additionally, all lateral wall array trajectories were within the anatomically accommodating insertion zone.

CONCLUSION:

This is the first study to use SR-PCI to visualize and quantify the entire ST morphology, from the round window to the apical tip, and assess the post-operative trajectory of electrodes. These high-resolution anatomical measurements can be used to inform the angular insertion depth that can be accommodated in CI patients, accounting for anatomical variability. LEVEL OF EVIDENCE N/A. Laryngoscope, 1342889-2897, 2024.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Rampa do Tímpano / Cadáver / Implantes Cocleares / Síncrotrons / Implante Coclear Limite: Humans Idioma: En Revista: Laryngoscope Assunto da revista: OTORRINOLARINGOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Canadá

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Rampa do Tímpano / Cadáver / Implantes Cocleares / Síncrotrons / Implante Coclear Limite: Humans Idioma: En Revista: Laryngoscope Assunto da revista: OTORRINOLARINGOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Canadá