Morphologic Analysis of the Scala Tympani Using Synchrotron: Implications for Cochlear Implantation.
Laryngoscope
; 134(6): 2889-2897, 2024 Jun.
Article
en 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.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Rampa Timpánica
/
Cadáver
/
Implantes Cocleares
/
Sincrotrones
/
Implantación Coclear
Límite:
Humans
Idioma:
En
Revista:
Laryngoscope
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Canadá
Pais de publicación:
Estados Unidos