Radiologic anatomy of the round window relevant to cochlear implantation and inner ear drug delivery.

ABSTRACT:

Objective

To determine anatomic relationships and variation of the round window membrane to bony surgical landmarks on computed tomography.

Study design

Retrospective imaging review.

Methods

100 temporal bone images were evaluated. Direct measurements were obtained for membrane position. Vector distances and angulation from umbo and bony annulus were calculated from image viewer software coordinates.

Results

The angle of round window membrane at junction with cochlear basal turn was (42.1 ± 8.6)°. The membrane's position relative to plane of the facial nerve through facial recess was (14.7 ± 5.2)° posterior from a reference line drawn through facial recess to carotid canal. Regarding transtympanic drug delivery, the round window membrane was directed 4.1 mm sup

SUBMITTER: Nguy PL 

PROVIDER: S-EPMC7801246 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature