Computed Tomography Study of the Retrosigmoid Craniotomy Keyhole Approach Using Surface Landmarks.

ABSTRACT:

Background

Due to a lack of accessibility and individual differences in surgical procedures, many previous studies on keyholes are not practical.

Objective

To study the surface landmarks for optimal keyhole placement in the retrosigmoid approach.

Methods

The three-dimensional (3D) skull images of 79 patients were reconstructed using workstations, with a total of 149 hemiskull base 3D images then analyzed. Skull-surface landmarks were marked, the lateral-skull surface was observed, and the positional relationships between the asterion and the extension line of the posterior margin of the mastoid process were measured. The position of the superior curvature of the sigmoid sinus groove was located before it was projected onto the lateral surface of the skull and defined

SUBMITTER: Hu W 

PROVIDER: S-EPMC9995208 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature